use eframe::egui;
use crate::file_tab::FileTab;
use crate::theme;
use crate::theme::ColorPalette;
use crate::types::HighlightRule;
use crate::ui::{render_log_view, LogViewContext};

pub fn render_filter_panel(tab: &mut FileTab, ctx: &egui::Context, highlight_rules: &Vec<HighlightRule>, export_clicked: &mut bool){
    if !tab.filtered_lines.is_empty() {
        let palette = theme::get_palette();

        egui::TopBottomPanel::bottom("filtered_view")
            .resizable(true)
            .default_height(250.0)
            .min_height(150.0)
            .show(ctx, |ui| {
                // Styled header
                render_filter_panel_header(ui, &palette, tab, export_clicked);

                ui.separator();

                render_log_view(
                    ui,
                    LogViewContext {
                        tab,
                        highlight_rules,
                        show_all: false,
                    },
                );
            });
    }
}

pub fn render_main_log_panel(ctx: &egui::Context, highlight_rules: &Vec<HighlightRule>, active_tab: Option<&mut FileTab>) {
    egui::CentralPanel::default().show(ctx, |ui| {
        let palette = theme::get_palette();

        if let Some(tab) = active_tab {
            // Styled header

            render_file_header(ui, palette, tab);

            ui.separator();

            render_log_view(
                ui,
                LogViewContext {
                    tab,
                    highlight_rules: &highlight_rules,
                    show_all: true,
                },
            );
        } else {
            render_no_file_opened_view(ui, palette);
        }
    });
}

fn render_filter_panel_header(ui: &mut egui::Ui, palette: &ColorPalette, tab: &FileTab, export_clicked: &mut bool){
    let header_frame = egui::Frame::none()
        .fill(palette.bg_secondary)
        .inner_margin(egui::Margin::symmetric(12.0, 8.0));

    header_frame.show(ui, |ui| {
        ui.horizontal(|ui| {
            let icon = egui::RichText::new("🔍")
                .size(16.0);
            ui.label(icon);

            let title = egui::RichText::new("Search Results")
                .size(16.0)
                .color(palette.text_primary)
                .strong();
            ui.label(title);

            let count = egui::RichText::new(format!("({} matches)", tab.filtered_lines.len()))
                .size(14.0)
                .color(palette.accent_bright);
            ui.label(count);

            ui.add_space(16.0);

            // Export button
            if ui.button("📤 Export").clicked() {
                *export_clicked = true;
            }
        });
    });
}

fn render_file_header(ui: &mut egui::Ui, palette: ColorPalette, tab: &FileTab) {
    let header_frame = egui::Frame::none()
        .fill(palette.bg_secondary)
        .inner_margin(egui::Margin::symmetric(12.0, 8.0));

    header_frame.show(ui, |ui| {
        ui.horizontal(|ui| {
            let icon = egui::RichText::new("📄")
                .size(16.0);
            ui.label(icon);

            let title = egui::RichText::new("Log View")
                .size(16.0)
                .color(palette.text_primary)
                .strong();
            ui.label(title);

            // Show filename
            if let Some(filename) = tab.file_path.file_name() {
                ui.add_space(8.0);
                let filename_text = egui::RichText::new(format!("• {}", filename.to_string_lossy()))
                    .size(14.0)
                    .color(palette.text_secondary);
                ui.label(filename_text);
            }

            // Show line count
            ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
                let line_count = egui::RichText::new(format!("{} lines", tab.line_index.total_lines))
                    .size(13.0)
                    .color(palette.text_muted);
                ui.label(line_count);
            });
        });
    });
}

fn render_no_file_opened_view(ui: &mut egui::Ui, palette: ColorPalette) {
    ui.centered_and_justified(|ui| {
        ui.vertical_centered(|ui| {
            ui.add_space(40.0);

            let icon = egui::RichText::new("📂")
                .size(48.0);
            ui.label(icon);

            ui.add_space(16.0);

            let text = egui::RichText::new("No file loaded")
                .size(18.0)
                .color(palette.text_secondary);
            ui.label(text);

            ui.add_space(8.0);

            let hint = egui::RichText::new("Click 'Open File' in the menu to get started")
                .size(14.0)
                .color(palette.text_muted);
            ui.label(hint);
        });
    });
}