use egui::Ui;
use crate::constants::chinese_hero_name;
use crate::state::{HeroState, Recommendations};

/// Render the in-game view with item build recommendations.
pub fn render(ui: &mut Ui, hero: &HeroState, recommendations: &Recommendations) {
    // ---- Header ----
    ui.horizontal(|ui| {
        ui.heading(
            egui::RichText::new("出装推荐")
                .color(egui::Color32::from_rgb(255, 200, 50))
                .size(18.0),
        );
        if recommendations.is_loading {
            ui.spinner();
        }
    });

    // Hero name (Chinese preferred)
    if let Some(name) = &hero.hero_name {
        let display = hero
            .hero_id
            .and_then(chinese_hero_name)
            .unwrap_or_else(|| name.strip_prefix("npc_dota_hero_").unwrap_or(name));
        ui.horizontal(|ui| {
            ui.colored_label(egui::Color32::LIGHT_GRAY, "英雄: ");
            ui.label(
                egui::RichText::new(display)
                    .color(egui::Color32::WHITE)
                    .strong(),
            );
            ui.colored_label(egui::Color32::GRAY, format!("Lv.{}", hero.level));
            if !hero.alive {
                ui.colored_label(egui::Color32::RED, "  [阵亡]");
            }
        });
    }

    ui.separator();

    // ---- Error ----
    if let Some(err) = &recommendations.last_error {
        ui.colored_label(egui::Color32::RED, format!("⚠ {}", err));
        return;
    }

    if recommendations.item_builds.is_empty() {
        if recommendations.is_loading {
            ui.colored_label(egui::Color32::GRAY, "正在加载出装数据...");
        } else if hero.hero_id.is_none() {
            ui.colored_label(egui::Color32::GRAY, "等待英雄信息...");
        } else {
            ui.colored_label(egui::Color32::GRAY, "暂无出装数据");
        }
        return;
    }

    // ---- Item phases ----
    for phase in &recommendations.item_builds {
        ui.collapsing(
            egui::RichText::new(&phase.phase_name)
                .color(egui::Color32::from_rgb(255, 210, 80))
                .size(13.0),
            |ui| {
                egui::Grid::new(format!("items_{}", &phase.phase_name))
                    .num_columns(2)
                    .striped(true)
                    .min_col_width(100.0)
                    .show(ui, |ui| {
                        ui.colored_label(egui::Color32::GRAY, "物品");
                        ui.colored_label(egui::Color32::GRAY, "流行度");
                        ui.end_row();

                        for item in &phase.items {
                            ui.label(&item.display_name);
                            let color = popularity_color(item.popularity_pct);
                            ui.colored_label(color, format!("{:.0}%", item.popularity_pct));
                            ui.end_row();
                        }
                    });
            },
        );
        ui.add_space(2.0);
    }
}

fn popularity_color(pct: f32) -> egui::Color32 {
    if pct >= 40.0 {
        egui::Color32::from_rgb(100, 230, 100)
    } else if pct >= 20.0 {
        egui::Color32::from_rgb(220, 220, 80)
    } else {
        egui::Color32::from_rgb(180, 180, 180)
    }
}