retch-cli 0.1.4

use crate::cli::Cli;
use crate::config::Config;
use crate::fetch::SystemInfo;
use crate::logo;
use crate::theme::Theme;

impl SystemInfo {
    /// Renders the collected system information to the terminal.
    ///
    /// This method handles theme selection, logo rendering (including fallbacks
    /// between graphics, Chafa, and ASCII), and field filtering based on
    /// CLI flags and configuration.
    pub fn display(&self, cli: &Cli, _config: &Config) -> anyhow::Result<()> {
        let theme_name = _config.theme.as_deref().or(cli.theme.as_deref());
        let mut theme = match theme_name {
            Some(name) => Theme::from_name(name),
            None => Theme::detect_system_theme(), // Default to system preference
        };

        // Apply custom theme overrides from config if present
        if let Some(custom) = &_config.custom_theme {
            theme = Theme::with_custom_overrides(theme, custom);
        }

        let show_logo = _config.show_logo.unwrap_or(true) && !cli.no_logo;
        if show_logo {
            #[cfg(feature = "graphics")]
            let mut printed_logo = false;
            #[cfg(not(feature = "graphics"))]
            let printed_logo = false;

            if !cli.ascii_only {
                // 1. Try user-provided custom logo first (config override)
                let user_logo = if let Some(config_dir) = dirs::config_dir() {
                    let p = config_dir.join("retch").join("logo.png");
                    if p.exists() {
                        Some(p)
                    } else {
                        None
                    }
                } else {
                    None
                };

                // 2. Kitty mode
                #[cfg(feature = "graphics")]
                if !printed_logo && logo::supports_kitty() {
                    if let Some(path) = &user_logo {
                        logo::print_graphical_logo_from_path(path);
                        printed_logo = true;
                    } else if let Some(distro) = logo::detect_distro() {
                        if let Some(bytes) = logo::get_embedded_logo(Some(&distro)) {
                            logo::print_graphical_logo(bytes);
                            printed_logo = true;
                        }
                    }
                }

                // 2.3 iTerm2 mode
                #[cfg(feature = "graphics")]
                if !printed_logo && logo::supports_iterm2() {
                    if let Some(path) = &user_logo {
                        logo::print_iterm2_logo_from_path(path);
                        printed_logo = true;
                    } else if let Some(distro) = logo::detect_distro() {
                        if let Some(bytes) = logo::get_embedded_logo(Some(&distro)) {
                            logo::print_iterm2_logo(bytes);
                            printed_logo = true;
                        }
                    }
                }

                // 2.5 Sixel mode
                #[cfg(feature = "graphics")]
                if !printed_logo && logo::supports_sixel() {
                    if let Some(path) = &user_logo {
                        logo::print_sixel_logo_from_path(path);
                        printed_logo = true;
                    } else if let Some(distro) = logo::detect_distro() {
                        if let Some(bytes) = logo::get_embedded_logo(Some(&distro)) {
                            logo::print_sixel_logo(bytes);
                            printed_logo = true;
                        }
                    }
                }

                // 3. Chafa fallback (high-quality symbols)
                if !printed_logo && logo::chafa_available() {
                    if let Some(path) = &user_logo {
                        if logo::print_with_chafa(path) {
                            printed_logo = true;
                        }
                    } else if logo::detect_distro().is_some() {
                        // For chafa we need a file, so we skip embedded for now
                        // (user can provide logo.png for chafa path)
                    }
                }
            }

            // 3. Final fallback: Real Fastfetch ASCII logo
            if !printed_logo {
                let distro_hint = logo::detect_distro();
                // Use the unified priority logic (graphic -> chafa -> ASCII)
                logo::print_distro_logo_with_ascii(distro_hint.as_deref(), cli.ascii_only);
            }
            println!(); // spacing after logo
        }

        // Determine which fields to show
        let allowed_fields: Option<Vec<String>> = if cli.long {
            None // show everything
        } else if cli.short {
            Some(vec![
                "os".to_string(),
                "kernel".to_string(),
                "host".to_string(),
                "cpu".to_string(),
                "gpu".to_string(),
                "memory".to_string(),
                "disk".to_string(),
            ])
        } else if let Some(fields) = &_config.fields {
            Some(fields.iter().map(|s| s.to_lowercase()).collect())
        } else {
            // Default set
            Some(vec![
                "os".to_string(),
                "kernel".to_string(),
                "host".to_string(),
                "cpu".to_string(),
                "gpu".to_string(),
                "memory".to_string(),
                "swap".to_string(),
                "load".to_string(),
                "disk".to_string(),
                "net".to_string(),
                "uptime".to_string(),
            ])
        };

        let should_show = |label: &str| -> bool {
            match &allowed_fields {
                Some(fields) => fields.contains(&label.to_lowercase()),
                None => true,
            }
        };

        // Helper for right-aligned labels
        let label_width = 10;
        let print_line = |label: &str, value: &str| {
            if should_show(label) {
                println!(
                    "{:>width$}{} {}",
                    theme.color_label(label),
                    theme.color_separator(":"),
                    theme.color_value(value),
                    width = label_width
                );
            }
        };

        print_line("OS", &self.os);
        if let Some(kernel) = &self.kernel {
            print_line("Kernel", kernel);
        }
        if let Some(host) = &self.hostname {
            print_line("Host", host);
        }
        if let Some(user) = &self.current_user {
            print_line("User", user);
        }
        print_line("Arch", &self.arch);
        print_line("CPU", &format!("{} ({} cores)", self.cpu, self.cpu_cores));
        if let Some(freq) = &self.cpu_freq {
            print_line("CPU Freq", freq);
        }
        if should_show("GPU") {
            for gpu in &self.gpu {
                print_line("GPU", gpu);
            }
        }
        print_line("Memory", &self.memory);
        print_line("Swap", &self.swap);
        print_line("Procs", &self.processes.to_string());
        if let Some(load) = &self.load_avg {
            print_line("Load", load);
        }

        if should_show("Disk") {
            for disk in &self.disks {
                print_line("Disk", disk);
            }
        }

        if should_show("Temp") {
            for temp in &self.temps {
                print_line("Temp", temp);
            }
        }

        if should_show("Net") {
            for net in &self.networks {
                print_line("Net", net);
            }
        }

        // Uptime: human duration first, then ISO boot time with timezone
        let uptime_str = format_uptime(&self.uptime);
        let boot_display = format!("{} since {}", uptime_str, self.boot_time);
        print_line("Uptime", &boot_display);

        if let Some(bat) = &self.battery {
            print_line("Battery", bat);
        }

        if let Some(shell) = &self.shell {
            print_line("Shell", shell);
        }
        if let Some(term) = &self.terminal {
            print_line("Terminal", term);
        }
        if let Some(de) = &self.desktop {
            print_line("Desktop", de);
        }
        print_line("Users", &self.users.to_string());
        if let Some(pkgs) = self.packages {
            if pkgs > 0 {
                print_line("Packages", &pkgs.to_string());
            }
        }

        Ok(())
    }
}

/// Formats a raw uptime string (in seconds) into a human-readable duration.
///
/// Example: "45224s" -> "12h 33m 44s"
fn format_uptime(uptime: &str) -> String {
    // Parse the uptime string (e.g. "45224s")
    let seconds: u64 = uptime.trim_end_matches('s').parse().unwrap_or(0);

    let years = seconds / (365 * 24 * 3600);
    let days = (seconds % (365 * 24 * 3600)) / (24 * 3600);
    let hours = (seconds % (24 * 3600)) / 3600;
    let minutes = (seconds % 3600) / 60;
    let secs = seconds % 60;

    let mut parts = Vec::new();
    if years > 0 {
        parts.push(format!("{}y", years));
    }
    if days > 0 {
        parts.push(format!("{}d", days));
    }
    if hours > 0 {
        parts.push(format!("{}h", hours));
    }
    if minutes > 0 {
        parts.push(format!("{}m", minutes));
    }
    if secs > 0 || parts.is_empty() {
        parts.push(format!("{}s", secs));
    }

    parts.join(" ")
}