ghostscope-ui 0.1.1

use super::syntax_highlighter;
use crate::action::ResponseType;
use crate::model::panel_state::{CommandPanelState, InteractionMode, LineType};
use crate::ui::themes::UIThemes;
use ratatui::{
    layout::Rect,
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, BorderType, Borders, Paragraph},
    Frame,
};
use unicode_width::UnicodeWidthChar;

/// Direct renderer for command panel (no caching)
#[derive(Debug)]
pub struct OptimizedRenderer {
    // Viewport management only
    scroll_offset: usize,
    visible_lines: usize,
}

impl OptimizedRenderer {
    pub fn new() -> Self {
        Self {
            scroll_offset: 0,
            visible_lines: 0,
        }
    }

    /// Mark that updates are pending (placeholder for API compatibility)
    pub fn mark_pending_updates(&mut self) {
        // No-op: direct rendering doesn't need pending flags
    }

    /// Main render function with direct rendering
    pub fn render(
        &mut self,
        f: &mut Frame,
        area: Rect,
        state: &CommandPanelState,
        is_focused: bool,
    ) {
        // Update viewport
        self.update_viewport(area);

        // Always render directly - no caching
        self.render_border(f, area, is_focused, state);
        self.render_content(f, area, state);
    }

    /// Update viewport information
    fn update_viewport(&mut self, area: Rect) {
        let height = area.height.saturating_sub(2);
        self.visible_lines = height as usize;
    }

    /// Render border with mode status
    fn render_border(
        &self,
        f: &mut Frame,
        area: Rect,
        is_focused: bool,
        state: &CommandPanelState,
    ) {
        let border_style = if !is_focused {
            Style::default().fg(Color::White)
        } else {
            match state.input_state {
                crate::model::panel_state::InputState::WaitingResponse { .. } => {
                    Style::default().fg(Color::Yellow)
                }
                _ => match state.mode {
                    InteractionMode::Input => Style::default().fg(Color::Green),
                    InteractionMode::Command => Style::default().fg(Color::Cyan),
                    InteractionMode::ScriptEditor => Style::default().fg(Color::Green),
                },
            }
        };

        let title = match state.input_state {
            crate::model::panel_state::InputState::WaitingResponse { .. } => {
                "Interactive Command (waiting for response...)".to_string()
            }
            _ => match state.mode {
                InteractionMode::Input => "Interactive Command (input mode)".to_string(),
                InteractionMode::Command => "Interactive Command (command mode)".to_string(),
                InteractionMode::ScriptEditor => "Interactive Command (script mode)".to_string(),
            },
        };

        let block = Block::default()
            .title(title)
            .borders(Borders::ALL)
            .border_type(if is_focused {
                BorderType::Thick
            } else {
                BorderType::Plain
            })
            .border_style(border_style);

        f.render_widget(block, area);
    }

    /// Render content directly
    fn render_content(&self, f: &mut Frame, area: Rect, state: &CommandPanelState) {
        let inner_area = Rect::new(
            area.x + 1,
            area.y + 1,
            area.width.saturating_sub(2),
            area.height.saturating_sub(2),
        );

        let width = inner_area.width;
        let mut lines = Vec::new();

        // Render static lines (welcome messages, etc.)
        for static_line in &state.static_lines {
            match static_line.line_type {
                LineType::Welcome => {
                    if let Some(ref styled_content) = static_line.styled_content {
                        let wrapped_lines = self.wrap_styled_line(styled_content, width as usize);
                        lines.extend(wrapped_lines);
                    } else {
                        let wrapped_lines = self.wrap_text(&static_line.content, width);
                        for wrapped_line in wrapped_lines {
                            lines.push(self.create_fallback_welcome_line(&wrapped_line));
                        }
                    }
                }
                LineType::Response => {
                    // Check if we have pre-styled content
                    if let Some(ref styled_content) = static_line.styled_content {
                        let wrapped_lines = self.wrap_styled_line(styled_content, width as usize);
                        lines.extend(wrapped_lines);
                    } else {
                        // Fallback to old logic
                        let wrapped_lines = self.wrap_text(&static_line.content, width);
                        // If original content has ANSI codes, don't use response_type for wrapped lines
                        let has_ansi = static_line.content.contains("\x1b[");
                        for wrapped_line in wrapped_lines {
                            let response_type = if has_ansi {
                                None // Let ANSI parser handle colors
                            } else {
                                static_line.response_type
                            };
                            lines.push(self.create_response_line(&wrapped_line, response_type));
                        }
                    }
                }
                LineType::Command => {
                    let wrapped_lines = self.wrap_text(&static_line.content, width);
                    for wrapped_line in wrapped_lines {
                        lines.push(self.create_command_line(&wrapped_line));
                    }
                }
                LineType::CurrentInput => {
                    let wrapped_lines = self.wrap_text(&static_line.content, width);
                    for wrapped_line in wrapped_lines {
                        lines.push(Line::from(Span::styled(
                            wrapped_line,
                            Style::default().fg(Color::White),
                        )));
                    }
                }
            }
        }

        // Note: command_history is now rendered via static_lines above
        // (see ResponseFormatter::update_static_lines which is called in add_response)
        // This eliminates redundant parsing and styling on every frame

        // Render current input
        match state.mode {
            InteractionMode::ScriptEditor => {
                if let Some(ref script_cache) = state.script_cache {
                    self.render_script_editor(script_cache, width, &mut lines);
                }
            }
            _ => {
                if matches!(
                    state.input_state,
                    crate::model::panel_state::InputState::Ready
                ) {
                    if state.is_in_history_search() {
                        self.render_history_search(state, width, &mut lines);
                    } else {
                        self.render_normal_input(state, width, &mut lines);
                    }
                }
            }
        }

        // Apply viewport
        let total_lines = lines.len();
        let visible_count = inner_area.height as usize;

        let (start_line, cursor_line_in_viewport) =
            if matches!(state.mode, InteractionMode::Command) || state.is_in_history_search() {
                let cursor_line = if state.is_in_history_search() {
                    total_lines.saturating_sub(1)
                } else {
                    state.command_cursor_line
                };

                let mut start = total_lines.saturating_sub(visible_count);

                if cursor_line < start {
                    start = cursor_line;
                } else if cursor_line >= start + visible_count {
                    start = cursor_line.saturating_sub(visible_count - 1);
                }

                (start, Some(cursor_line.saturating_sub(start)))
            } else {
                let start = total_lines.saturating_sub(visible_count);
                (start, None)
            };

        let mut visible_lines: Vec<Line> = lines
            .into_iter()
            .skip(start_line)
            .take(visible_count)
            .collect();

        // Add command mode cursor if needed
        if let Some(cursor_line_idx) = cursor_line_in_viewport {
            if cursor_line_idx < visible_lines.len()
                && matches!(state.mode, InteractionMode::Command)
            {
                self.add_command_cursor(
                    &mut visible_lines[cursor_line_idx],
                    state.command_cursor_column,
                );
            }
        }

        let paragraph = Paragraph::new(visible_lines);
        f.render_widget(paragraph, inner_area);
    }

    /// Render script editor content
    fn render_script_editor(
        &self,
        script_cache: &crate::model::panel_state::ScriptCache,
        width: u16,
        lines: &mut Vec<Line<'static>>,
    ) {
        // Header - make sure it doesn't exceed terminal width
        let header = format!(
            "🔨 Entering script mode for target: {}",
            script_cache.target
        );
        // Truncate if too long
        let header_display = if header.len() > width as usize {
            format!("{}...", &header[..width as usize - 3])
        } else {
            header
        };
        lines.push(Line::from(Span::styled(
            header_display,
            Style::default().fg(Color::Cyan),
        )));

        // Separator - adapt to terminal width, but ensure minimum visibility
        let separator_width = std::cmp::min(width as usize, 60).saturating_sub(4); // Leave some margin
        let separator = "─".repeat(separator_width);
        lines.push(Line::from(Span::styled(
            separator,
            Style::default().fg(Color::Cyan),
        )));

        // Prompt - wrap if necessary
        let prompt_text = "Script Editor (Ctrl+s to submit, Esc to cancel):";
        let wrapped_prompts = self.wrap_text(prompt_text, width);
        for wrapped_prompt in wrapped_prompts {
            lines.push(Line::from(Span::styled(
                wrapped_prompt,
                Style::default()
                    .fg(Color::Cyan)
                    .add_modifier(Modifier::BOLD),
            )));
        }

        // Add empty line for better separation
        lines.push(Line::from(""));

        // Script lines
        for (line_idx, line_content) in script_cache.lines.iter().enumerate() {
            let line_number = format!("{:3} │ ", line_idx + 1);
            let is_cursor_line = line_idx == script_cache.cursor_line;

            // Check if line content needs wrapping
            let line_number_width = line_number.chars().count();
            let available_width = width as usize - line_number_width;

            if line_content.chars().count() > available_width {
                // Line needs wrapping
                let wrapped_lines = self.wrap_text(line_content, width - line_number_width as u16);
                for (wrap_idx, wrapped_content) in wrapped_lines.iter().enumerate() {
                    if wrap_idx == 0 {
                        // First line includes line number
                        if is_cursor_line {
                            lines.push(self.create_script_line_with_cursor(
                                &line_number,
                                wrapped_content,
                                script_cache.cursor_col,
                            ));
                        } else {
                            lines.push(
                                self.create_highlighted_script_line(&line_number, wrapped_content),
                            );
                        }
                    } else {
                        // Continuation lines use spaces for alignment
                        let continuation_prefix = " ".repeat(line_number_width);
                        if is_cursor_line
                            && script_cache.cursor_col >= wrapped_content.chars().count()
                        {
                            // Cursor might be on this continuation line
                            let cursor_in_continuation =
                                script_cache.cursor_col - wrapped_content.chars().count();
                            lines.push(self.create_script_line_with_cursor(
                                &continuation_prefix,
                                wrapped_content,
                                cursor_in_continuation,
                            ));
                        } else {
                            lines.push(self.create_highlighted_script_line(
                                &continuation_prefix,
                                wrapped_content,
                            ));
                        }
                    }
                }
            } else {
                // Line fits within width
                if is_cursor_line {
                    lines.push(self.create_script_line_with_cursor(
                        &line_number,
                        line_content,
                        script_cache.cursor_col,
                    ));
                } else {
                    lines.push(self.create_highlighted_script_line(&line_number, line_content));
                }
            }
        }
    }

    /// Render history search input
    fn render_history_search(
        &self,
        state: &CommandPanelState,
        width: u16,
        lines: &mut Vec<Line<'static>>,
    ) {
        let search_query = state.get_history_search_query();

        if let Some(matched_command) = state
            .history_search
            .current_match(&state.command_history_manager)
        {
            // Success case
            let prompt_text = format!("(reverse-i-search)`{search_query}': ");
            let full_content = format!("{prompt_text}{matched_command}");

            if full_content.chars().count() > width as usize {
                // Wrapped case
                let wrapped_lines = self.wrap_text(&full_content, width);
                let cursor_pos = prompt_text.chars().count() + search_query.len();

                let mut char_count = 0;
                for line in wrapped_lines.iter() {
                    let line_char_count = line.chars().count();
                    let line_end = char_count + line_char_count;

                    if cursor_pos >= char_count && cursor_pos < line_end {
                        // This line contains the cursor
                        let cursor_in_line = cursor_pos - char_count;
                        lines.push(self.create_history_search_line_with_cursor(
                            line,
                            &prompt_text,
                            cursor_in_line,
                        ));
                    } else {
                        lines.push(
                            self.create_history_search_line_without_cursor(line, &prompt_text),
                        );
                    }
                    char_count = line_end;
                }
            } else {
                // Single line case
                let cursor_pos = search_query.len();
                lines.push(self.create_simple_history_search_line(
                    &prompt_text,
                    matched_command,
                    cursor_pos,
                    true,
                ));
            }
        } else if search_query.is_empty() {
            // Empty search
            let prompt_text = "(reverse-i-search)`': ";

            if prompt_text.chars().count() > width as usize {
                // Wrapped empty search
                let wrapped_lines = self.wrap_text(prompt_text, width);
                for wrapped_line in wrapped_lines {
                    lines.push(Line::from(Span::styled(
                        wrapped_line,
                        Style::default().fg(Color::Cyan),
                    )));
                }
            } else {
                // Single line empty search
                lines.push(Line::from(Span::styled(
                    prompt_text,
                    Style::default().fg(Color::Cyan),
                )));
            }
        } else {
            // Failed search
            let failed_prompt = format!("(failed reverse-i-search)`{search_query}': ");

            if failed_prompt.chars().count() > width as usize {
                // Wrapped failed search
                let wrapped_lines = self.wrap_text(&failed_prompt, width);
                for wrapped_line in wrapped_lines {
                    lines.push(Line::from(Span::styled(
                        wrapped_line,
                        Style::default().fg(Color::Red),
                    )));
                }
            } else {
                // Single line failed search
                lines.push(Line::from(Span::styled(
                    failed_prompt,
                    Style::default().fg(Color::Red),
                )));
            }
        }
    }

    /// Render normal input
    fn render_normal_input(
        &self,
        state: &CommandPanelState,
        width: u16,
        lines: &mut Vec<Line<'static>>,
    ) {
        let prompt = "(ghostscope) ";
        let input_text = state.get_display_text();
        let cursor_pos = state.get_display_cursor_position();

        // Include auto-suggestion in wrapping calculation
        let suggestion_text = state.get_suggestion_text().unwrap_or_default();
        let full_content_with_suggestion = format!("{prompt}{input_text}{suggestion_text}");
        let base_content = format!("{prompt}{input_text}");

        if full_content_with_suggestion.chars().count() > width as usize {
            // Handle wrapped input - wrap based on input only, but suggestion affects decision
            tracing::debug!(
                "Wrapping text: suggestion_len={}, input_len={}, total_len={}, width={}",
                suggestion_text.len(),
                input_text.len(),
                full_content_with_suggestion.len(),
                width
            );
            // Calculate how much space suggestion would take in the last line
            let base_wrapped = self.wrap_text(&base_content, width);
            let last_line_len = base_wrapped
                .last()
                .map(|line| line.chars().count())
                .unwrap_or(0);
            let suggestion_fits_in_last_line =
                last_line_len + suggestion_text.chars().count() <= width as usize;

            let wrapped_lines = if suggestion_fits_in_last_line {
                // Suggestion fits, use base wrapping
                base_wrapped
            } else {
                // Suggestion doesn't fit, wrap the full content but remove suggestion from lines
                let full_wrapped = self.wrap_text(&full_content_with_suggestion, width);
                full_wrapped
                    .into_iter()
                    .map(|line| {
                        // Remove suggestion text from lines (it will be added back during rendering)
                        if line.ends_with(&suggestion_text) {
                            line[..line.len() - suggestion_text.len()].to_string()
                        } else {
                            line
                        }
                    })
                    .collect()
            };
            tracing::debug!(
                "Wrapped into {} lines: {:?}",
                wrapped_lines.len(),
                wrapped_lines
            );
            let cursor_pos_with_prompt = cursor_pos + prompt.chars().count();

            let mut char_count = 0;
            for (line_idx, line) in wrapped_lines.iter().enumerate() {
                let line_char_count = line.chars().count();
                let line_end = char_count + line_char_count;

                let is_last_line = line_idx == wrapped_lines.len() - 1;
                let cursor_in_range = cursor_pos_with_prompt >= char_count
                    && (cursor_pos_with_prompt < line_end
                        || (cursor_pos_with_prompt == line_end && is_last_line));

                if cursor_in_range {
                    let cursor_in_line = cursor_pos_with_prompt - char_count;
                    lines.push(self.create_input_line_with_cursor_wrapped(
                        line,
                        prompt,
                        cursor_in_line,
                        line_idx == 0,
                        is_last_line,
                        state,
                    ));
                } else {
                    lines.push(self.create_input_line_without_cursor(line, prompt, line_idx == 0));
                }
                char_count = line_end;
            }
        } else {
            // Single line input
            lines.push(self.create_input_line(prompt, input_text, cursor_pos, state));
        }
    }

    /// Create simple history search line
    fn create_simple_history_search_line(
        &self,
        prompt_text: &str,
        matched_command: &str,
        cursor_pos: usize,
        show_cursor: bool,
    ) -> Line<'static> {
        let mut spans = vec![Span::styled(
            prompt_text.to_string(),
            Style::default().fg(Color::Cyan),
        )];

        if show_cursor {
            self.add_text_with_cursor(&mut spans, matched_command, cursor_pos);
        } else {
            spans.push(Span::styled(matched_command.to_string(), Style::default()));
        }

        Line::from(spans)
    }

    /// Create history search line with cursor (wrapped)
    fn create_history_search_line_with_cursor(
        &self,
        line: &str,
        prompt_text: &str,
        cursor_pos: usize,
    ) -> Line<'static> {
        let chars: Vec<char> = line.chars().collect();
        let mut spans = Vec::new();
        let prompt_len = prompt_text.chars().count();

        if prompt_len > 0 && prompt_len <= chars.len() {
            // Line contains prompt
            let prompt_part: String = chars[..prompt_len].iter().collect();
            spans.push(Span::styled(prompt_part, Style::default().fg(Color::Cyan)));

            let text_part: String = chars[prompt_len..].iter().collect();
            let cursor_in_text = cursor_pos.saturating_sub(prompt_len);
            self.add_text_with_cursor(&mut spans, &text_part, cursor_in_text);
        } else {
            // Continuation line
            self.add_text_with_cursor(&mut spans, line, cursor_pos);
        }

        Line::from(spans)
    }

    /// Create history search line without cursor (wrapped)
    fn create_history_search_line_without_cursor(
        &self,
        line: &str,
        prompt_text: &str,
    ) -> Line<'static> {
        let chars: Vec<char> = line.chars().collect();
        let mut spans = Vec::new();
        let prompt_len = prompt_text.chars().count();

        if prompt_len > 0 && prompt_len <= chars.len() {
            let prompt_part: String = chars[..prompt_len].iter().collect();
            spans.push(Span::styled(prompt_part, Style::default().fg(Color::Cyan)));

            let text_part: String = chars[prompt_len..].iter().collect();
            spans.push(Span::styled(text_part, Style::default()));
        } else {
            spans.push(Span::styled(line.to_string(), Style::default()));
        }

        Line::from(spans)
    }

    /// Create input line with cursor for wrapped text environment
    fn create_input_line_with_cursor_wrapped(
        &self,
        line: &str,
        prompt: &str,
        cursor_pos: usize,
        is_first_line: bool,
        is_last_line: bool,
        state: &CommandPanelState,
    ) -> Line<'static> {
        let chars: Vec<char> = line.chars().collect();
        let mut spans = Vec::new();
        let prompt_len = if is_first_line {
            prompt.chars().count()
        } else {
            0
        };

        if is_first_line && prompt_len <= chars.len() {
            let prompt_part: String = chars[..prompt_len].iter().collect();
            spans.push(Span::styled(
                prompt_part,
                Style::default().fg(Color::Magenta),
            ));

            let text_part: String = chars[prompt_len..].iter().collect();
            let cursor_in_text = cursor_pos.saturating_sub(prompt_len);

            // Only show auto-suggestion on last line when cursor is at end
            if is_last_line && cursor_in_text >= text_part.chars().count() {
                // Add text with suggestion
                tracing::debug!(
                    "Rendering with suggestion: is_last_line={}, cursor_in_text={}, text_part='{}'",
                    is_last_line,
                    cursor_in_text,
                    text_part
                );
                self.add_text_with_cursor_and_suggestion(
                    &mut spans,
                    &text_part,
                    cursor_in_text,
                    state,
                );
            } else {
                // Add text without suggestion
                tracing::debug!("Rendering without suggestion: is_last_line={}, cursor_in_text={}, text_part='{}'",
                               is_last_line, cursor_in_text, text_part);
                self.add_text_with_cursor(&mut spans, &text_part, cursor_in_text);
            }
        } else {
            // Only show auto-suggestion on last line when cursor is at end
            if is_last_line && cursor_pos >= line.chars().count() {
                // Add text with suggestion
                self.add_text_with_cursor_and_suggestion(&mut spans, line, cursor_pos, state);
            } else {
                // Add text without suggestion
                self.add_text_with_cursor(&mut spans, line, cursor_pos);
            }
        }

        Line::from(spans)
    }

    /// Create input line without cursor
    fn create_input_line_without_cursor(
        &self,
        line: &str,
        prompt: &str,
        is_first_line: bool,
    ) -> Line<'static> {
        let chars: Vec<char> = line.chars().collect();
        let mut spans = Vec::new();
        let prompt_len = if is_first_line {
            prompt.chars().count()
        } else {
            0
        };

        if is_first_line && prompt_len <= chars.len() {
            let prompt_part: String = chars[..prompt_len].iter().collect();
            spans.push(Span::styled(
                prompt_part,
                Style::default().fg(Color::Magenta),
            ));

            let text_part: String = chars[prompt_len..].iter().collect();
            spans.push(Span::styled(text_part, Style::default()));
        } else {
            spans.push(Span::styled(line.to_string(), Style::default()));
        }

        Line::from(spans)
    }

    /// Add command cursor to existing line
    fn add_command_cursor(&self, line: &mut Line<'static>, cursor_col: usize) {
        let mut new_spans = Vec::new();
        let mut current_pos = 0;

        for span in &line.spans {
            let span_len = span.content.chars().count();
            let span_end = current_pos + span_len;

            if cursor_col >= current_pos && cursor_col < span_end {
                let chars: Vec<char> = span.content.chars().collect();
                let cursor_pos_in_span = cursor_col - current_pos;

                if cursor_pos_in_span > 0 {
                    let before: String = chars[..cursor_pos_in_span].iter().collect();
                    new_spans.push(Span::styled(before, span.style));
                }

                if cursor_pos_in_span < chars.len() {
                    let cursor_char = chars[cursor_pos_in_span];
                    new_spans.push(Span::styled(
                        cursor_char.to_string(),
                        UIThemes::cursor_style(),
                    ));

                    if cursor_pos_in_span + 1 < chars.len() {
                        let after: String = chars[cursor_pos_in_span + 1..].iter().collect();
                        new_spans.push(Span::styled(after, span.style));
                    }
                } else {
                    new_spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
                }
            } else {
                new_spans.push(span.clone());
            }

            current_pos = span_end;
        }

        if cursor_col >= current_pos {
            new_spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
        }

        line.spans = new_spans;
    }

    /// Create a styled input line with cursor
    fn create_input_line(
        &self,
        prompt: &str,
        input_text: &str,
        cursor_pos: usize,
        state: &CommandPanelState,
    ) -> Line<'static> {
        let chars: Vec<char> = input_text.chars().collect();
        let mut spans = vec![Span::styled(
            prompt.to_string(),
            Style::default().fg(Color::Magenta),
        )];

        let show_cursor = matches!(state.mode, InteractionMode::Input);

        if chars.is_empty() {
            if let Some(suggestion_text) = state.get_suggestion_text() {
                let suggestion_chars: Vec<char> = suggestion_text.chars().collect();
                if !suggestion_chars.is_empty() {
                    spans.push(Span::styled(
                        suggestion_chars[0].to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default().fg(Color::DarkGray)
                        },
                    ));
                    if suggestion_chars.len() > 1 {
                        let remaining: String = suggestion_chars[1..].iter().collect();
                        spans.push(Span::styled(
                            remaining,
                            Style::default().fg(Color::DarkGray),
                        ));
                    }
                }
            } else {
                spans.push(Span::styled(
                    " ".to_string(),
                    if show_cursor {
                        UIThemes::cursor_style()
                    } else {
                        Style::default()
                    },
                ));
            }
        } else if cursor_pos >= chars.len() {
            // Cursor at end - check if we have auto-suggestion to merge
            if let Some(suggestion_text) = state.get_suggestion_text() {
                // We have auto-suggestion, show merged text with cursor at boundary
                let full_text = format!("{input_text}{suggestion_text}");
                let full_chars: Vec<char> = full_text.chars().collect();

                // Show input part in normal color
                if !input_text.is_empty() {
                    spans.push(Span::styled(input_text.to_string(), Style::default()));
                }

                // Show the character at cursor position as block cursor
                if cursor_pos < full_chars.len() {
                    let cursor_char = full_chars[cursor_pos];
                    spans.push(Span::styled(
                        cursor_char.to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default().fg(Color::DarkGray)
                        },
                    ));

                    // Show remaining characters in dark gray
                    if cursor_pos + 1 < full_chars.len() {
                        let remaining: String = full_chars[cursor_pos + 1..].iter().collect();
                        spans.push(Span::styled(
                            remaining,
                            Style::default().fg(Color::DarkGray),
                        ));
                    }
                } else {
                    // Fallback - show space as block cursor
                    spans.push(Span::styled(
                        " ".to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default()
                        },
                    ));
                }
            } else {
                // No auto-suggestion, show block cursor at end
                spans.push(Span::styled(input_text.to_string(), Style::default()));
                spans.push(Span::styled(
                    " ".to_string(),
                    if show_cursor {
                        UIThemes::cursor_style()
                    } else {
                        Style::default()
                    },
                ));
            }
        } else {
            // Cursor in middle of text - show character as block cursor
            let before_cursor: String = chars[..cursor_pos].iter().collect();
            let at_cursor = chars[cursor_pos];
            let after_cursor: String = chars[cursor_pos + 1..].iter().collect();

            // Text before cursor
            if !before_cursor.is_empty() {
                spans.push(Span::styled(before_cursor, Style::default()));
            }

            // Character at cursor position as block cursor
            spans.push(Span::styled(
                at_cursor.to_string(),
                if show_cursor {
                    UIThemes::cursor_style()
                } else {
                    Style::default()
                },
            ));

            // Text after cursor
            if !after_cursor.is_empty() {
                spans.push(Span::styled(after_cursor, Style::default()));
            }

            // Add auto-suggestion at the end if cursor is at the end of meaningful text
            if cursor_pos + 1 >= chars.len() {
                if let Some(suggestion_text) = state.get_suggestion_text() {
                    spans.push(Span::styled(
                        suggestion_text.to_string(),
                        Style::default().fg(Color::DarkGray),
                    ));
                }
            }
        }

        Line::from(spans)
    }

    /// Create a script line with syntax highlighting
    fn create_highlighted_script_line(&self, line_number: &str, content: &str) -> Line<'static> {
        let mut spans = vec![Span::styled(
            line_number.to_string(),
            Style::default().fg(Color::DarkGray),
        )];

        // Get syntax highlighted spans for the content
        let highlighted_spans = syntax_highlighter::highlight_line(content);
        spans.extend(highlighted_spans);

        Line::from(spans)
    }

    /// Create a script line with cursor and syntax highlighting
    fn create_script_line_with_cursor(
        &self,
        line_number: &str,
        content: &str,
        cursor_pos: usize,
    ) -> Line<'static> {
        let chars: Vec<char> = content.chars().collect();
        let mut spans = vec![Span::styled(
            line_number.to_string(),
            Style::default().fg(Color::DarkGray),
        )];

        if chars.is_empty() {
            spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
        } else if cursor_pos >= chars.len() {
            // Add syntax highlighted content, then cursor at end
            let highlighted_spans = syntax_highlighter::highlight_line(content);
            spans.extend(highlighted_spans);
            spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
        } else {
            // Split content at cursor position
            let before_cursor: String = chars[..cursor_pos].iter().collect();
            let at_cursor = chars[cursor_pos];
            let after_cursor: String = chars[cursor_pos + 1..].iter().collect();

            // Highlight before cursor part
            if !before_cursor.is_empty() {
                let before_spans = syntax_highlighter::highlight_line(&before_cursor);
                spans.extend(before_spans);
            }

            // Character at cursor position as block cursor
            spans.push(Span::styled(
                at_cursor.to_string(),
                UIThemes::cursor_style(),
            ));

            // Highlight after cursor part
            if !after_cursor.is_empty() {
                let after_spans = syntax_highlighter::highlight_line(&after_cursor);
                spans.extend(after_spans);
            }
        }

        Line::from(spans)
    }

    /// Create a styled command line
    fn create_command_line(&self, content: &str) -> Line<'static> {
        if content.starts_with("(ghostscope) ") {
            let prompt_part = "(ghostscope) ";
            let command_part = &content[prompt_part.len()..];

            Line::from(vec![
                Span::styled(
                    prompt_part.to_string(),
                    Style::default().fg(Color::DarkGray),
                ),
                Span::styled(command_part.to_string(), Style::default().fg(Color::Gray)),
            ])
        } else {
            Line::from(Span::styled(
                content.to_string(),
                Style::default().fg(Color::Gray),
            ))
        }
    }

    /// Create a styled response line
    fn create_response_line(
        &self,
        content: &str,
        response_type: Option<ResponseType>,
    ) -> Line<'static> {
        // Check if content contains ANSI color codes
        if content.contains("\x1b[") {
            // Parse ANSI codes and create styled spans
            Line::from(self.parse_ansi_colors(content))
        } else {
            // Use default response type styling
            let style = match response_type {
                Some(ResponseType::Success) => Style::default().fg(Color::Green),
                Some(ResponseType::Error) => Style::default().fg(Color::Red),
                Some(ResponseType::Warning) => Style::default().fg(Color::Yellow),
                Some(ResponseType::Info) => Style::default().fg(Color::Cyan),
                Some(ResponseType::Progress) => Style::default().fg(Color::Blue),
                Some(ResponseType::ScriptDisplay) => Style::default().fg(Color::Magenta),
                None => Style::default(), // No color for wrapped ANSI lines
            };
            Line::from(Span::styled(content.to_string(), style))
        }
    }

    /// Create fallback welcome line
    fn create_fallback_welcome_line(&self, content: &str) -> Line<'static> {
        if content.contains("GhostScope") {
            Line::from(Span::styled(
                content.to_string(),
                Style::default()
                    .fg(Color::Green)
                    .add_modifier(Modifier::BOLD),
            ))
        } else if content.starts_with("•") || content.starts_with("Loading completed in") {
            Line::from(Span::styled(
                content.to_string(),
                Style::default().fg(Color::Cyan),
            ))
        } else if content.starts_with("Attached to process") {
            Line::from(Span::styled(
                content.to_string(),
                Style::default().fg(Color::White),
            ))
        } else if content.trim().is_empty() {
            Line::from("")
        } else {
            Line::from(Span::styled(
                content.to_string(),
                Style::default().fg(Color::White),
            ))
        }
    }

    /// Add text with cursor to spans vector
    fn add_text_with_cursor(&self, spans: &mut Vec<Span<'static>>, text: &str, cursor_pos: usize) {
        let chars: Vec<char> = text.chars().collect();

        if chars.is_empty() {
            spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
        } else if cursor_pos == 0 {
            let first_char = chars[0];
            spans.push(Span::styled(
                first_char.to_string(),
                UIThemes::cursor_style(),
            ));
            if chars.len() > 1 {
                let remaining: String = chars[1..].iter().collect();
                spans.push(Span::styled(remaining, Style::default()));
            }
        } else if cursor_pos >= chars.len() {
            spans.push(Span::styled(text.to_string(), Style::default()));
            spans.push(Span::styled(" ".to_string(), UIThemes::cursor_style()));
        } else {
            let before_cursor: String = chars[..cursor_pos].iter().collect();
            let at_cursor = chars[cursor_pos];
            let after_cursor: String = chars[cursor_pos + 1..].iter().collect();

            if !before_cursor.is_empty() {
                spans.push(Span::styled(before_cursor, Style::default()));
            }

            spans.push(Span::styled(
                at_cursor.to_string(),
                UIThemes::cursor_style(),
            ));

            if !after_cursor.is_empty() {
                spans.push(Span::styled(after_cursor, Style::default()));
            }
        }
    }

    /// Add text with cursor and auto-suggestion support
    fn add_text_with_cursor_and_suggestion(
        &self,
        spans: &mut Vec<Span<'static>>,
        text: &str,
        cursor_pos: usize,
        state: &CommandPanelState,
    ) {
        let chars: Vec<char> = text.chars().collect();
        let show_cursor = matches!(state.mode, InteractionMode::Input);

        if chars.is_empty() {
            if let Some(suggestion_text) = state.get_suggestion_text() {
                let suggestion_chars: Vec<char> = suggestion_text.chars().collect();
                if !suggestion_chars.is_empty() {
                    spans.push(Span::styled(
                        suggestion_chars[0].to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default().fg(Color::DarkGray)
                        },
                    ));

                    if suggestion_chars.len() > 1 {
                        let remaining: String = suggestion_chars[1..].iter().collect();
                        spans.push(Span::styled(
                            remaining,
                            Style::default().fg(Color::DarkGray),
                        ));
                    }
                } else {
                    spans.push(Span::styled(
                        " ".to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default()
                        },
                    ));
                }
            } else {
                spans.push(Span::styled(
                    " ".to_string(),
                    if show_cursor {
                        UIThemes::cursor_style()
                    } else {
                        Style::default()
                    },
                ));
            }
        } else if cursor_pos >= chars.len() {
            // Cursor at end - check if we have auto-suggestion to merge
            if let Some(suggestion_text) = state.get_suggestion_text() {
                // We have auto-suggestion, show merged text with cursor at boundary
                let full_text = format!("{text}{suggestion_text}");
                let full_chars: Vec<char> = full_text.chars().collect();

                // Show input part in normal color
                if !text.is_empty() {
                    spans.push(Span::styled(text.to_string(), Style::default()));
                }

                // Show the character at cursor position as block cursor
                if cursor_pos < full_chars.len() {
                    let cursor_char = full_chars[cursor_pos];
                    spans.push(Span::styled(
                        cursor_char.to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default().fg(Color::DarkGray)
                        },
                    ));

                    // Show remaining characters in dark gray
                    if cursor_pos + 1 < full_chars.len() {
                        let remaining: String = full_chars[cursor_pos + 1..].iter().collect();
                        spans.push(Span::styled(
                            remaining,
                            Style::default().fg(Color::DarkGray),
                        ));
                    }
                } else {
                    // Fallback - show space as block cursor
                    spans.push(Span::styled(
                        " ".to_string(),
                        if show_cursor {
                            UIThemes::cursor_style()
                        } else {
                            Style::default()
                        },
                    ));
                }
            } else {
                // No auto-suggestion, show block cursor at end
                spans.push(Span::styled(text.to_string(), Style::default()));
                spans.push(Span::styled(
                    " ".to_string(),
                    if show_cursor {
                        UIThemes::cursor_style()
                    } else {
                        Style::default()
                    },
                ));
            }
        } else {
            // Cursor in middle of text
            let before_cursor: String = chars[..cursor_pos].iter().collect();
            let at_cursor = chars[cursor_pos];
            let after_cursor: String = chars[cursor_pos + 1..].iter().collect();

            if !before_cursor.is_empty() {
                spans.push(Span::styled(before_cursor, Style::default()));
            }

            spans.push(Span::styled(
                at_cursor.to_string(),
                if show_cursor {
                    UIThemes::cursor_style()
                } else {
                    Style::default()
                },
            ));

            if !after_cursor.is_empty() {
                spans.push(Span::styled(after_cursor, Style::default()));
            }

            // Add auto-suggestion at the end if cursor is at the end of meaningful text
            if cursor_pos + 1 >= chars.len() {
                if let Some(suggestion_text) = state.get_suggestion_text() {
                    spans.push(Span::styled(
                        suggestion_text.to_string(),
                        Style::default().fg(Color::DarkGray),
                    ));
                }
            }
        }
    }

    /// Wrap text to fit within the specified width (preserves ANSI escape sequences and color state)
    fn wrap_text(&self, text: &str, width: u16) -> Vec<String> {
        if width <= 2 {
            return vec![text.to_string()];
        }

        let max_width = width as usize;
        let mut lines = Vec::new();

        for line in text.lines() {
            // Calculate visible width (excluding ANSI codes)
            let line_width = self.visible_width(line);

            if line_width <= max_width {
                lines.push(line.to_string());
            } else {
                let mut current_line = String::new();
                let mut current_width = 0;
                let mut chars = line.chars().peekable();
                let mut in_ansi_sequence = false;
                let mut active_color_code = String::new(); // Track active color

                while let Some(ch) = chars.next() {
                    // Detect ANSI escape sequence start
                    if ch == '\x1b' && chars.peek() == Some(&'[') {
                        in_ansi_sequence = true;
                        current_line.push(ch);
                        active_color_code.clear();
                        active_color_code.push(ch);
                        continue;
                    }

                    // If in ANSI sequence, add character without counting width
                    if in_ansi_sequence {
                        current_line.push(ch);
                        active_color_code.push(ch);
                        if ch == 'm' {
                            in_ansi_sequence = false;
                            // Check if this is a reset code
                            if active_color_code == "\x1b[0m" {
                                active_color_code.clear();
                            }
                        }
                        continue;
                    }

                    // Normal character - count width
                    let char_width = UnicodeWidthChar::width(ch).unwrap_or(0);

                    if current_width + char_width > max_width && !current_line.is_empty() {
                        // Add reset before line break if we have active color
                        if !active_color_code.is_empty() && !current_line.ends_with("\x1b[0m") {
                            current_line.push_str("\x1b[0m");
                        }
                        lines.push(current_line);

                        // Start new line with active color if any
                        current_line = String::new();
                        if !active_color_code.is_empty() && active_color_code != "\x1b[0m" {
                            current_line.push_str(&active_color_code);
                        }
                        current_line.push(ch);
                        current_width = char_width;
                    } else {
                        current_line.push(ch);
                        current_width += char_width;
                    }
                }

                if !current_line.is_empty() {
                    lines.push(current_line);
                }
            }
        }

        if lines.is_empty() {
            lines.push(String::new());
        }

        lines
    }

    /// Calculate visible width of text (excluding ANSI escape sequences)
    fn visible_width(&self, text: &str) -> usize {
        let mut width = 0;
        let mut chars = text.chars().peekable();
        let mut in_ansi_sequence = false;

        while let Some(ch) = chars.next() {
            if ch == '\x1b' && chars.peek() == Some(&'[') {
                in_ansi_sequence = true;
                continue;
            }

            if in_ansi_sequence {
                if ch == 'm' {
                    in_ansi_sequence = false;
                }
                continue;
            }

            width += UnicodeWidthChar::width(ch).unwrap_or(0);
        }

        width
    }

    /// Wrap styled line preserving spans - uses same logic as wrap_text() for consistency
    fn wrap_styled_line(&self, styled_line: &Line<'static>, width: usize) -> Vec<Line<'static>> {
        // Extract plain text from styled line
        let plain_text: String = styled_line
            .spans
            .iter()
            .map(|span| span.content.as_ref())
            .collect();

        // Use wrap_text to get line breaks (same logic as cursor calculation)
        let wrapped_texts = self.wrap_text(&plain_text, width as u16);

        if wrapped_texts.len() <= 1 {
            return vec![styled_line.clone()];
        }

        // Now split styled_line according to wrapped_texts
        let mut result_lines = Vec::new();
        let mut span_index = 0;
        let mut span_char_offset = 0;

        for wrapped_text in wrapped_texts {
            let mut current_line_spans = Vec::new();
            let mut chars_needed = wrapped_text.chars().count();

            while chars_needed > 0 && span_index < styled_line.spans.len() {
                let span = &styled_line.spans[span_index];
                let span_text = span.content.as_ref();
                let span_chars: Vec<char> = span_text.chars().collect();

                let available_chars = span_chars.len() - span_char_offset;
                let chars_to_take = chars_needed.min(available_chars);

                let taken_text: String = span_chars
                    [span_char_offset..span_char_offset + chars_to_take]
                    .iter()
                    .collect();

                if !taken_text.is_empty() {
                    current_line_spans.push(Span::styled(taken_text, span.style));
                }

                span_char_offset += chars_to_take;
                chars_needed -= chars_to_take;

                if span_char_offset >= span_chars.len() {
                    span_index += 1;
                    span_char_offset = 0;
                }
            }

            if !current_line_spans.is_empty() {
                result_lines.push(Line::from(current_line_spans));
            }
        }

        result_lines
    }

    /// Scroll methods for API compatibility
    pub fn scroll_up(&mut self) {
        if self.scroll_offset > 0 {
            self.scroll_offset -= 1;
        }
    }

    pub fn scroll_down(&mut self) {
        self.scroll_offset += 1;
    }

    /// Parse ANSI color codes and create styled spans
    fn parse_ansi_colors(&self, text: &str) -> Vec<Span<'static>> {
        let mut spans = Vec::new();
        let mut current_text = String::new();
        let mut current_style = Style::default();
        let mut chars = text.chars().peekable();

        while let Some(ch) = chars.next() {
            if ch == '\x1b' && chars.peek() == Some(&'[') {
                // Save current text if any
                if !current_text.is_empty() {
                    spans.push(Span::styled(current_text.clone(), current_style));
                    current_text.clear();
                }

                // Skip '['
                chars.next();

                // Parse color code
                let mut code = String::new();
                while let Some(&c) = chars.peek() {
                    if c == 'm' {
                        chars.next(); // consume 'm'
                        break;
                    }
                    code.push(c);
                    chars.next();
                }

                // Apply color based on code
                current_style = match code.as_str() {
                    "0" => Style::default(),                     // Reset
                    "31" => Style::default().fg(Color::Red),     // Red
                    "32" => Style::default().fg(Color::Green),   // Green
                    "33" => Style::default().fg(Color::Yellow),  // Yellow
                    "34" => Style::default().fg(Color::Blue),    // Blue
                    "35" => Style::default().fg(Color::Magenta), // Magenta
                    "36" => Style::default().fg(Color::Cyan),    // Cyan
                    _ => current_style,                          // Unknown, keep current
                };
            } else {
                current_text.push(ch);
            }
        }

        // Add remaining text
        if !current_text.is_empty() {
            spans.push(Span::styled(current_text, current_style));
        }

        if spans.is_empty() {
            spans.push(Span::raw(text.to_string()));
        }

        spans
    }
}

impl Default for OptimizedRenderer {
    fn default() -> Self {
        Self::new()
    }
}