use std::collections::HashMap;

use godot::{
    classes::{
        Button, Control, GridContainer, IPanelContainer, InputEvent, InputEventKey,
        InputEventMouseButton, InputMap, Label, LineEdit, PanelContainer,
        control::{FocusBehaviorRecursive, FocusMode, SizeFlags},
    },
    prelude::*,
};

use crate::{
    game_settings::{GameSettingsManager, Keybind},
    ui::slider::SliderContainer,
};

#[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Ord, Eq, Hash)]
pub enum Setting {
    // General settings
    FoV,
    DefaultName,

    // Volume settings
    MasterVolume,
    SfxVolume,
    MusicVolume,
    AnnouncerVolume,

    // Keybinds
    MoveLeft,
    MoveForward,
    MoveRight,
    MoveBackward,
    Shoot,
    Melee,
    Jump,
    SelectRaygun,
    SelectShotgun,
}

pub enum SettingsTab {
    General,
    Volume,
    Keybinds,
}

impl ToString for Setting {
    fn to_string(&self) -> String {
        match self {
            Setting::FoV => "Field of View",
            Setting::DefaultName => "Default Name",

            Setting::MasterVolume => "Master volume",
            Setting::SfxVolume => "Sfx Volume",
            Setting::MusicVolume => "Music Volume",
            Setting::AnnouncerVolume => "Announcer Volume",

            Setting::MoveLeft => "Move left",
            Setting::MoveRight => "Move right",
            Setting::MoveForward => "Move forward",
            Setting::MoveBackward => "Move backward",
            Setting::SelectRaygun => "Select Raygun",
            Setting::SelectShotgun => "Select Shotgun",
            Setting::Shoot => "Shoot",
            Setting::Melee => "Melee",
            Setting::Jump => "Jump",
        }
        .to_string()
    }
}

impl Setting {
    pub fn tab(&self) -> SettingsTab {
        match self {
            Setting::FoV => SettingsTab::General,
            Setting::DefaultName => SettingsTab::General,

            Setting::MasterVolume => SettingsTab::Volume,
            Setting::SfxVolume => SettingsTab::Volume,
            Setting::MusicVolume => SettingsTab::Volume,
            Setting::AnnouncerVolume => SettingsTab::Volume,

            _ => SettingsTab::Keybinds,
        }
    }
}

#[derive(Clone)]
pub enum SettingValue {
    SliderNumber(SliderValue),
    String(String),
    Keybind(Keybind),
}

#[derive(Clone, Copy)]
pub struct SliderValue {
    min: f64,
    max: f64,
    value: f64,
}

#[derive(GodotClass)]
#[class(base=PanelContainer, init)]
pub struct SettingsPanel {
    #[export]
    general_grid: Option<Gd<GridContainer>>,
    #[export]
    volume_grid: Option<Gd<GridContainer>>,
    #[export]
    keybinds_grid: Option<Gd<GridContainer>>,
    #[export]
    slider_scene: Option<Gd<PackedScene>>,

    settings: HashMap<Setting, SettingValue>,

    keybind_button: Option<(Setting, Gd<Button>)>,

    base: Base<PanelContainer>,
}

#[godot_api]
impl IPanelContainer for SettingsPanel {
    fn ready(&mut self) {
        let singleton = GameSettingsManager::singleton();
        let settings = &singleton.bind().settings;
        self.settings.insert(
            Setting::FoV,
            SettingValue::SliderNumber(SliderValue {
                min: 60.,
                max: 120.,
                value: settings.fov,
            }),
        );
        self.settings.insert(
            Setting::DefaultName,
            SettingValue::String(settings.default_name.clone()),
        );
        self.settings.insert(
            Setting::MasterVolume,
            SettingValue::SliderNumber(SliderValue {
                min: 0.,
                max: 100.,
                value: settings.volume.master_volume,
            }),
        );
        self.settings.insert(
            Setting::SfxVolume,
            SettingValue::SliderNumber(SliderValue {
                min: 0.,
                max: 100.,
                value: settings.volume.sfx_volume,
            }),
        );
        self.settings.insert(
            Setting::MusicVolume,
            SettingValue::SliderNumber(SliderValue {
                min: 0.,
                max: 100.,
                value: settings.volume.music_volume,
            }),
        );
        self.settings.insert(
            Setting::AnnouncerVolume,
            SettingValue::SliderNumber(SliderValue {
                min: 0.,
                max: 100.,
                value: settings.volume.announcer_volume,
            }),
        );

        self.settings.insert(
            Setting::MoveForward,
            SettingValue::Keybind(settings.keybinds.move_forward),
        );
        self.settings.insert(
            Setting::MoveBackward,
            SettingValue::Keybind(settings.keybinds.move_backward),
        );
        self.settings.insert(
            Setting::MoveLeft,
            SettingValue::Keybind(settings.keybinds.move_left),
        );
        self.settings.insert(
            Setting::MoveRight,
            SettingValue::Keybind(settings.keybinds.move_right),
        );
        self.settings.insert(
            Setting::SelectRaygun,
            SettingValue::Keybind(settings.keybinds.select_raygun),
        );
        self.settings.insert(
            Setting::SelectShotgun,
            SettingValue::Keybind(settings.keybinds.select_shotgun),
        );
        self.settings.insert(
            Setting::Shoot,
            SettingValue::Keybind(settings.keybinds.shoot),
        );
        self.settings.insert(
            Setting::Melee,
            SettingValue::Keybind(settings.keybinds.melee),
        );
        self.settings
            .insert(Setting::Jump, SettingValue::Keybind(settings.keybinds.jump));

        let mut keys = self.settings.keys().collect::<Vec<_>>();
        keys.sort();

        for setting in keys.into_iter() {
            let value = self.settings.get(setting).unwrap().clone();

            let grid = match setting.tab() {
                SettingsTab::General => self.general_grid.clone(),
                SettingsTab::Volume => self.volume_grid.clone(),
                SettingsTab::Keybinds => self.keybinds_grid.clone(),
            };

            if let Some(mut grid) = grid {
                let mut label = Label::new_alloc();
                label.set_text(&setting.to_string());
                label.set_h_size_flags(SizeFlags::EXPAND | SizeFlags::SHRINK_BEGIN);
                grid.add_child(&label);

                if let Some(scene) = self.slider_scene.clone() {
                    let node = match value {
                        SettingValue::SliderNumber(slider_value) => {
                            let mut slider = scene.instantiate_as::<SliderContainer>();

                            slider.bind_mut().min = slider_value.min;
                            slider.bind_mut().max = slider_value.max;
                            slider.bind_mut().value = slider_value.value;

                            let setting_clone = setting.clone();
                            let value_clone = slider_value.clone();
                            slider.bind_mut().signals().on_change().connect_other(
                                self,
                                move |s, new_value| {
                                    s.run_deferred(move |s| {
                                        s.on_change(
                                            setting_clone,
                                            SettingValue::SliderNumber(SliderValue {
                                                value: new_value,
                                                ..value_clone
                                            }),
                                        )
                                    })
                                },
                            );

                            slider.upcast::<Control>()
                        }
                        SettingValue::String(value) => {
                            let mut line_edit = LineEdit::new_alloc();
                            line_edit.set_custom_minimum_size(Vector2::new(100., -1.));
                            line_edit.set_text(&value);
                            line_edit.set_max_length(20);

                            let setting_clone = setting.clone();
                            line_edit
                                .signals()
                                .text_changed()
                                .connect_other(self, move |s, v| {
                                    s.on_change(setting_clone, SettingValue::String(v.to_string()));
                                });

                            line_edit.upcast()
                        }
                        SettingValue::Keybind(value) => {
                            let mut toggle_button = Button::new_alloc();
                            toggle_button.set_text(&value.to_string());
                            toggle_button.set_toggle_mode(true);

                            let setting_clone = setting.clone();
                            let button_clone = toggle_button.clone();
                            toggle_button
                                .signals()
                                .pressed()
                                .connect_other(self, move |s| {
                                    if let Some((_, mut button)) = s.keybind_button.take() {
                                        button.set_pressed(false);
                                    }
                                    s.base_mut().set_focus_behavior_recursive(
                                        FocusBehaviorRecursive::DISABLED,
                                    );
                                    s.keybind_button = Some((setting_clone, button_clone.clone()))
                                });

                            toggle_button.upcast()
                        }
                    };

                    grid.add_child(&node);
                }
            }
        }
    }

    fn input(&mut self, event: Gd<InputEvent>) {
        if let Some((setting, mut button)) = self.keybind_button.clone()
            && let Some(keybind) = Keybind::from_event(event)
        {
            self.keybind_button.take();
            self.on_change(setting.clone(), SettingValue::Keybind(keybind));
            button.set_text(&keybind.to_string());
            button.set_pressed(false);
            self.base_mut()
                .set_focus_behavior_recursive(FocusBehaviorRecursive::INHERITED);
        }
    }
}

#[godot_api]
impl SettingsPanel {
    pub fn on_change(&mut self, setting: Setting, new_value: SettingValue) {
        self.settings.insert(setting, new_value);

        let mut new_settings = GameSettingsManager::singleton().bind().settings.clone();
        for (setting, value) in &self.settings {
            match (setting, value) {
                (Setting::FoV, SettingValue::SliderNumber(value)) => {
                    new_settings.fov = value.value;
                }
                (Setting::DefaultName, SettingValue::String(value)) => {
                    new_settings.default_name = value.clone()
                }

                (Setting::MasterVolume, SettingValue::SliderNumber(value)) => {
                    new_settings.volume.master_volume = value.value;
                }
                (Setting::SfxVolume, SettingValue::SliderNumber(value)) => {
                    new_settings.volume.sfx_volume = value.value;
                }
                (Setting::MusicVolume, SettingValue::SliderNumber(value)) => {
                    new_settings.volume.music_volume = value.value;
                }
                (Setting::AnnouncerVolume, SettingValue::SliderNumber(value)) => {
                    new_settings.volume.announcer_volume = value.value;
                }

                (Setting::MoveRight, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.move_right = *keybind;
                }
                (Setting::MoveLeft, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.move_left = *keybind;
                }
                (Setting::MoveForward, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.move_forward = *keybind;
                }
                (Setting::MoveBackward, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.move_backward = *keybind;
                }
                (Setting::SelectRaygun, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.select_raygun = *keybind;
                }
                (Setting::SelectShotgun, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.select_raygun = *keybind;
                }
                (Setting::Shoot, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.shoot = *keybind;
                }
                (Setting::Melee, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.melee = *keybind;
                }
                (Setting::Jump, SettingValue::Keybind(keybind)) => {
                    new_settings.keybinds.jump = *keybind;
                }
                _ => {}
            }
        }
        GameSettingsManager::singleton()
            .bind_mut()
            .update_settings(new_settings);
    }

    #[func]
    pub fn open(&mut self) {
        self.base_mut().set_visible(true);
    }

    #[func]
    pub fn close(&mut self) {
        self.base_mut().set_visible(false);
    }
}