use crate::seed;
use eframe::egui;
use egui::RichText;
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
enum Tab {
    Generate,
    Layout,
}

impl Default for Tab {
    fn default() -> Self {
        Self::Generate
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(default)]
pub struct UiSettings {
    pub seed: u64,
    pub cols: usize,
    pub rows: usize,
    pub room_count: usize,
    pub min_room_size: usize,
    pub max_room_size: usize,
    pub square_rooms_only: bool,
    pub corridor_randomness: usize,
    pub dead_end_rooms_percent: usize,
    pub door_frequency_percent: usize,
    pub room_hallway_door_percent: usize,
    pub locked_door_percent: usize,
    pub allow_middle_corridor_doors: bool,
    pub colorblind_mode: bool,
    active_tab: Tab,
}

impl Default for UiSettings {
    fn default() -> Self {
        Self {
            seed: 1,
            cols: 24,
            rows: 18,
            room_count: 8,
            min_room_size: 2,
            max_room_size: 6,
            square_rooms_only: false,
            corridor_randomness: 0,
            dead_end_rooms_percent: 0,
            door_frequency_percent: 30,
            room_hallway_door_percent: 70,
            locked_door_percent: 25,
            allow_middle_corridor_doors: false,
            colorblind_mode: false,
            active_tab: Tab::Generate,
        }
    }
}

#[derive(Debug, Clone, Copy, Default)]
pub struct SidePanelResult {
    pub settings_changed: bool,
    pub reset_clicked: bool,
}

pub fn draw_side_panel(ctx: &egui::Context, settings: &mut UiSettings) -> SidePanelResult {
    let mut result = SidePanelResult::default();

    egui::SidePanel::left("options_panel")
        .resizable(true)
        .min_width(180.0)
        .default_width(280.0)
        .show_separator_line(true)
        .show(ctx, |ui| {
            ui.horizontal(|ui| {
                let is_generate = settings.active_tab == Tab::Generate;
                let is_layout = settings.active_tab == Tab::Layout;

                if ui.selectable_label(is_generate, "Generate").clicked() {
                    settings.active_tab = Tab::Generate;
                }
                if ui.selectable_label(is_layout, "Layout").clicked() {
                    settings.active_tab = Tab::Layout;
                }
            });
            ui.separator();

            match settings.active_tab {
                Tab::Generate => draw_generate_tab(ui, settings, &mut result),
                Tab::Layout => draw_layout_tab(ui, settings, &mut result),
            }
        });

    result
}

fn draw_generate_tab(ui: &mut egui::Ui, settings: &mut UiSettings, result: &mut SidePanelResult) {
    ui.label(RichText::new("Grid Settings").strong());
    ui.add_space(8.0);

    ui.label("Columns");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.cols, 6..=100).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.cols)
                    .speed(1.0)
                    .range(2..=500),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Rows");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.rows, 6..=100).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.rows)
                    .speed(1.0)
                    .range(2..=500),
            )
            .changed();
    });

    ui.add_space(12.0);
    ui.separator();
    ui.add_space(8.0);
    ui.label(RichText::new("Seed Settings").strong());
    ui.add_space(8.0);

    ui.label("Master Seed");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::DragValue::new(&mut settings.seed).speed(1.0))
            .changed();
        if ui.button("Random").clicked() {
            settings.seed = seed::random_seed();
            result.settings_changed = true;
        }
    });

    ui.add_space(8.0);
    if ui.button("Reset").clicked() {
        result.reset_clicked = true;
    }
}

fn draw_layout_tab(ui: &mut egui::Ui, settings: &mut UiSettings, result: &mut SidePanelResult) {
    ui.label(RichText::new("Room Settings").strong());
    ui.add_space(8.0);

    ui.label("Room Count");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.room_count, 1..=40).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.room_count)
                    .speed(1.0)
                    .range(1..=200),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Min Room Size");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.min_room_size, 2..=30).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.min_room_size)
                    .speed(1.0)
                    .range(2..=200),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Max Room Size");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.max_room_size, 2..=30).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.max_room_size)
                    .speed(1.0)
                    .range(2..=200),
            )
            .changed();
    });

    ui.add_space(8.0);
    result.settings_changed |= ui
        .checkbox(&mut settings.square_rooms_only, "Square Rooms Only")
        .changed();

    ui.add_space(12.0);
    ui.separator();
    ui.add_space(8.0);
    ui.label(RichText::new("Corridor Settings").strong());
    ui.add_space(8.0);

    ui.label("Corridor Randomness (%)");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.corridor_randomness, 0..=100).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.corridor_randomness)
                    .speed(1.0)
                    .range(0..=100),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Dead-End Rooms (%)");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.dead_end_rooms_percent, 0..=50).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.dead_end_rooms_percent)
                    .speed(1.0)
                    .range(0..=50),
            )
            .changed();
    });

    ui.add_space(12.0);
    ui.separator();
    ui.add_space(8.0);
    ui.label(RichText::new("Door Settings").strong());
    ui.add_space(8.0);

    ui.label("Door Frequency (%)");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.door_frequency_percent, 0..=100).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.door_frequency_percent)
                    .speed(1.0)
                    .range(0..=100),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Room/Hallway Door Chance (%)");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(
                egui::Slider::new(&mut settings.room_hallway_door_percent, 0..=100)
                    .show_value(false),
            )
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.room_hallway_door_percent)
                    .speed(1.0)
                    .range(0..=100),
            )
            .changed();
    });

    ui.add_space(8.0);
    ui.label("Locked Door Chance (%)");
    ui.horizontal(|ui| {
        result.settings_changed |= ui
            .add(egui::Slider::new(&mut settings.locked_door_percent, 0..=100).show_value(false))
            .changed();
        result.settings_changed |= ui
            .add(
                egui::DragValue::new(&mut settings.locked_door_percent)
                    .speed(1.0)
                    .range(0..=100),
            )
            .changed();
    });

    ui.add_space(8.0);
    result.settings_changed |= ui
        .checkbox(
            &mut settings.allow_middle_corridor_doors,
            "Allow Middle Corridor Doors",
        )
        .changed();
}