text-document-io 1.4.1

// Generated by Qleany v1.4.8 from feature_use_case.tera
use crate::ExportDocxDto;
use crate::ExportDocxResultDto;
use anyhow::{Result, anyhow};
use common::database::QueryUnitOfWork;
use common::entities::{
    Block, Document, Frame, InlineContent, InlineElement, List, Root, Table, TableCell,
};
use common::long_operation::LongOperation;
use common::types::{EntityId, ROOT_ENTITY_ID};
use std::collections::HashSet;
use std::sync::Arc;

pub trait ExportDocxUnitOfWorkFactoryTrait: Send + Sync {
    fn create(&self) -> Box<dyn ExportDocxUnitOfWorkTrait>;
}

#[macros::uow_action(entity = "Root", action = "GetRO", thread_safe = true)]
#[macros::uow_action(entity = "Root", action = "GetRelationshipRO", thread_safe = true)]
#[macros::uow_action(entity = "Document", action = "GetRO", thread_safe = true)]
#[macros::uow_action(entity = "Document", action = "GetRelationshipRO", thread_safe = true)]
#[macros::uow_action(entity = "Frame", action = "GetRO", thread_safe = true)]
#[macros::uow_action(entity = "Frame", action = "GetRelationshipRO", thread_safe = true)]
#[macros::uow_action(entity = "Block", action = "GetMultiRO", thread_safe = true)]
#[macros::uow_action(entity = "Block", action = "GetRelationshipRO", thread_safe = true)]
#[macros::uow_action(entity = "InlineElement", action = "GetMultiRO", thread_safe = true)]
#[macros::uow_action(entity = "List", action = "GetRO", thread_safe = true)]
#[macros::uow_action(entity = "Table", action = "GetRO", thread_safe = true)]
#[macros::uow_action(entity = "Table", action = "GetRelationshipRO", thread_safe = true)]
#[macros::uow_action(entity = "TableCell", action = "GetMultiRO", thread_safe = true)]
pub trait ExportDocxUnitOfWorkTrait: QueryUnitOfWork + Send + Sync {}

pub struct ExportDocxUseCase {
    uow_factory: Box<dyn ExportDocxUnitOfWorkFactoryTrait>,
    dto: ExportDocxDto,
}

impl ExportDocxUseCase {
    pub fn new(
        uow_factory: Box<dyn ExportDocxUnitOfWorkFactoryTrait>,
        dto: &ExportDocxDto,
    ) -> Self {
        ExportDocxUseCase {
            uow_factory,
            dto: dto.clone(),
        }
    }
}

impl LongOperation for ExportDocxUseCase {
    type Output = ExportDocxResultDto;

    fn execute(
        &self,
        progress_callback: Box<dyn Fn(common::long_operation::OperationProgress) + Send>,
        cancel_flag: Arc<std::sync::atomic::AtomicBool>,
    ) -> Result<Self::Output> {
        use docx_rs::*;
        use std::sync::atomic::Ordering;

        // Validate output path
        let output_path = std::path::Path::new(&self.dto.output_path);
        if let Some(parent) = output_path.parent()
            && !parent.as_os_str().is_empty()
            && !parent.exists()
        {
            return Err(anyhow!(
                "Output directory does not exist: '{}'",
                parent.display()
            ));
        }

        progress_callback(common::long_operation::OperationProgress::new(
            0.0,
            Some("Starting DOCX export...".to_string()),
        ));

        let uow = self.uow_factory.create();
        uow.begin_transaction()?;

        // Step 1: Get Root and Document
        let root = uow
            .get_root(&ROOT_ENTITY_ID)?
            .ok_or_else(|| anyhow!("Root entity not found"))?;

        let doc_ids = uow.get_root_relationship(
            &root.id,
            &common::direct_access::root::RootRelationshipField::Document,
        )?;
        let doc_id = *doc_ids
            .first()
            .ok_or_else(|| anyhow!("Root has no associated Document"))?;

        let frame_ids = uow.get_document_relationship(
            &doc_id,
            &common::direct_access::document::DocumentRelationshipField::Frames,
        )?;

        // Collect all cell frame IDs so we can skip them in the main loop
        let table_ids = uow.get_document_relationship(
            &doc_id,
            &common::direct_access::document::DocumentRelationshipField::Tables,
        )?;
        let mut cell_frame_ids: HashSet<EntityId> = HashSet::new();
        for tid in &table_ids {
            let cell_ids = uow.get_table_relationship(
                tid,
                &common::direct_access::table::TableRelationshipField::Cells,
            )?;
            let cells_opt = uow.get_table_cell_multi(&cell_ids)?;
            for cell in cells_opt.into_iter().flatten() {
                if let Some(cf_id) = cell.cell_frame {
                    cell_frame_ids.insert(cf_id);
                }
            }
        }

        let mut docx = Docx::new();
        let mut paragraph_count: i64 = 0;

        progress_callback(common::long_operation::OperationProgress::new(
            10.0,
            Some("Walking document tree...".to_string()),
        ));

        for frame_id in &frame_ids {
            if cancel_flag.load(Ordering::Relaxed) {
                uow.end_transaction()?;
                return Err(anyhow!("Operation was cancelled"));
            }

            // Skip cell frames — they're rendered as part of their table
            if cell_frame_ids.contains(frame_id) {
                continue;
            }

            // Check if this is a table anchor frame
            let frame = uow.get_frame(frame_id)?;
            if let Some(ref f) = frame
                && let Some(table_id) = f.table
            {
                let table = self.render_table_docx(&*uow, &table_id)?;
                docx = docx.add_table(table);
                paragraph_count += 1;
                continue;
            }

            let block_ids = uow.get_frame_relationship(
                frame_id,
                &common::direct_access::frame::FrameRelationshipField::Blocks,
            )?;

            if block_ids.is_empty() {
                continue;
            }

            let blocks_opt = uow.get_block_multi(&block_ids)?;
            let mut blocks: Vec<Block> = blocks_opt.into_iter().flatten().collect();
            blocks.sort_by_key(|b| b.document_position);
            let total = blocks.len();

            for (idx, block) in blocks.iter().enumerate() {
                if cancel_flag.load(Ordering::Relaxed) {
                    uow.end_transaction()?;
                    return Err(anyhow!("Operation was cancelled"));
                }

                let element_ids = uow.get_block_relationship(
                    &block.id,
                    &common::direct_access::block::BlockRelationshipField::Elements,
                )?;

                let elements_opt = uow.get_inline_element_multi(&element_ids)?;
                let elements: Vec<InlineElement> = elements_opt.into_iter().flatten().collect();

                let mut paragraph = Paragraph::new();

                // Apply heading style
                if let Some(level) = block.fmt_heading_level {
                    let style_name = format!("Heading{}", level.clamp(1, 6));
                    paragraph = paragraph.style(&style_name);
                }
                // Apply line height (thousandths → 240ths: 1000 = 240, 1500 = 360)
                if let Some(lh) = block.fmt_line_height {
                    let twips = (lh as f64 / 1000.0 * 240.0) as i32;
                    paragraph = paragraph.line_spacing(
                        LineSpacing::new()
                            .line_rule(LineSpacingType::Auto)
                            .line(twips),
                    );
                }
                // Apply non-breakable lines
                if block.fmt_non_breakable_lines == Some(true) {
                    paragraph = paragraph.keep_lines(true);
                }
                // Note: bidi (RTL direction) and paragraph shading (background_color)
                // are not directly exposed on Paragraph in docx-rs 0.4.

                for elem in &elements {
                    let text = match &elem.content {
                        InlineContent::Text(t) => t.clone(),
                        InlineContent::Image { name, .. } => {
                            format!("[Image: {}]", name)
                        }
                        InlineContent::Empty => String::new(),
                    };

                    if text.is_empty() {
                        continue;
                    }

                    let mut run = Run::new().add_text(text);

                    if elem.fmt_font_bold == Some(true) {
                        run = run.bold();
                    }
                    if elem.fmt_font_italic == Some(true) {
                        run = run.italic();
                    }
                    if elem.fmt_font_underline == Some(true) {
                        run = run.underline("single");
                    }
                    if elem.fmt_font_strikeout == Some(true) {
                        run = run.strike();
                    }
                    if elem.fmt_font_family.as_deref() == Some("monospace") {
                        run = run.fonts(RunFonts::new().ascii("Courier New"));
                    }

                    paragraph = paragraph.add_run(run);
                }

                docx = docx.add_paragraph(paragraph);
                paragraph_count += 1;

                if idx % 10 == 0 {
                    let pct = 10.0 + (idx as f32 / total as f32) * 80.0;
                    progress_callback(common::long_operation::OperationProgress::new(
                        pct,
                        Some(format!("Processing paragraph {}/{}", idx + 1, total)),
                    ));
                }
            }
        }

        uow.end_transaction()?;

        progress_callback(common::long_operation::OperationProgress::new(
            90.0,
            Some("Writing DOCX file...".to_string()),
        ));

        // Write to file
        let file = std::fs::File::create(&self.dto.output_path).map_err(|e| {
            anyhow!(
                "Failed to create output file '{}': {}",
                self.dto.output_path,
                e
            )
        })?;
        docx.build()
            .pack(file)
            .map_err(|e| anyhow!("Failed to write DOCX: {}", e))?;

        progress_callback(common::long_operation::OperationProgress::new(
            100.0,
            Some("completed".to_string()),
        ));

        Ok(ExportDocxResultDto {
            file_path: self.dto.output_path.clone(),
            paragraph_count,
        })
    }
}

impl ExportDocxUseCase {
    fn render_table_docx(
        &self,
        uow: &dyn ExportDocxUnitOfWorkTrait,
        table_id: &EntityId,
    ) -> Result<docx_rs::Table> {
        use docx_rs::*;

        let table = uow
            .get_table(table_id)?
            .ok_or_else(|| anyhow!("Table not found"))?;

        let cell_ids = uow.get_table_relationship(
            table_id,
            &common::direct_access::table::TableRelationshipField::Cells,
        )?;
        let cells_opt = uow.get_table_cell_multi(&cell_ids)?;
        let mut cells: Vec<common::entities::TableCell> = cells_opt.into_iter().flatten().collect();
        cells.sort_by(|a, b| a.row.cmp(&b.row).then(a.column.cmp(&b.column)));

        // Build a grid to track which cells are covered by spans
        let rows = table.rows as usize;
        let cols = table.columns as usize;
        let mut covered = vec![vec![false; cols]; rows];

        // Build column grid widths
        let grid: Vec<usize> = table.column_widths.iter().map(|w| *w as usize).collect();

        let mut docx_rows: Vec<TableRow> = Vec::new();

        for r in 0..rows {
            let mut docx_cells: Vec<docx_rs::TableCell> = Vec::new();

            for c in 0..cols {
                if covered[r][c] {
                    // This position is covered by a row/column span from another cell.
                    // In DOCX, vertically merged continuation cells still need a <w:tc>
                    // with vMerge continue. For column spans, the cell is simply absent.
                    // Check if this is a vertical merge continuation (a cell above spans into this row)
                    let needs_vmerge_continue = r > 0 && {
                        // Look for a cell above that spans into this row
                        cells.iter().any(|cell| {
                            cell.column == c as i64
                                && cell.row < r as i64
                                && (cell.row + cell.row_span) > r as i64
                        })
                    };
                    if needs_vmerge_continue {
                        let cont_cell =
                            docx_rs::TableCell::new().vertical_merge(VMergeType::Continue);
                        docx_cells.push(cont_cell);
                    }
                    continue;
                }

                // Find the cell at this position
                let cell = cells
                    .iter()
                    .find(|cell| cell.row == r as i64 && cell.column == c as i64);

                if let Some(cell) = cell {
                    let mut docx_cell = docx_rs::TableCell::new();

                    // Apply column span
                    if cell.column_span > 1 {
                        docx_cell = docx_cell.grid_span(cell.column_span as usize);
                    }

                    // Apply vertical merge for row spans
                    if cell.row_span > 1 {
                        docx_cell = docx_cell.vertical_merge(VMergeType::Restart);
                    }

                    // Render cell content from the cell's frame
                    if let Some(cf_id) = cell.cell_frame {
                        let block_ids = uow.get_frame_relationship(
                            &cf_id,
                            &common::direct_access::frame::FrameRelationshipField::Blocks,
                        )?;
                        let blocks_opt = uow.get_block_multi(&block_ids)?;
                        let mut blocks: Vec<Block> = blocks_opt.into_iter().flatten().collect();
                        blocks.sort_by_key(|b| b.document_position);

                        for block in &blocks {
                            let element_ids = uow.get_block_relationship(
                                &block.id,
                                &common::direct_access::block::BlockRelationshipField::Elements,
                            )?;
                            let elements_opt = uow.get_inline_element_multi(&element_ids)?;
                            let elements: Vec<InlineElement> =
                                elements_opt.into_iter().flatten().collect();

                            let mut paragraph = Paragraph::new();
                            for elem in &elements {
                                let text = match &elem.content {
                                    InlineContent::Text(t) => t.clone(),
                                    InlineContent::Image { name, .. } => {
                                        format!("[Image: {}]", name)
                                    }
                                    InlineContent::Empty => String::new(),
                                };

                                if text.is_empty() {
                                    continue;
                                }

                                let mut run = Run::new().add_text(text);
                                if elem.fmt_font_bold == Some(true) {
                                    run = run.bold();
                                }
                                if elem.fmt_font_italic == Some(true) {
                                    run = run.italic();
                                }
                                if elem.fmt_font_underline == Some(true) {
                                    run = run.underline("single");
                                }
                                if elem.fmt_font_strikeout == Some(true) {
                                    run = run.strike();
                                }
                                if elem.fmt_font_family.as_deref() == Some("monospace") {
                                    run = run.fonts(RunFonts::new().ascii("Courier New"));
                                }

                                paragraph = paragraph.add_run(run);
                            }
                            docx_cell = docx_cell.add_paragraph(paragraph);
                        }
                    }

                    docx_cells.push(docx_cell);

                    // Mark spanned cells as covered
                    for sr in 0..cell.row_span as usize {
                        for sc in 0..cell.column_span as usize {
                            if sr == 0 && sc == 0 {
                                continue;
                            }
                            if r + sr < rows && c + sc < cols {
                                covered[r + sr][c + sc] = true;
                            }
                        }
                    }
                } else {
                    // Empty cell — no TableCell entity at this position
                    let docx_cell = docx_rs::TableCell::new().add_paragraph(Paragraph::new());
                    docx_cells.push(docx_cell);
                }
            }

            docx_rows.push(TableRow::new(docx_cells));
        }

        let mut docx_table = docx_rs::Table::new(docx_rows);
        if !grid.is_empty() {
            docx_table = docx_table.set_grid(grid);
        }

        Ok(docx_table)
    }
}