pub mod camera_info;

use std::cell::RefCell;

use cgmath::Vector3;

use crate::{GameState, eguictx::EguiCtx, solar_system, timeman::{self, Second, TimeMan}, ui::camera_info::CameraWindowState};

mod ui {
    pub use super::camera_info;
}

#[derive(Default, Clone)]
pub struct State
{
    pub current_system: Option<solar_system::SystemId>,
    pub auto_time: Option<Second>,
    pub do_auto_tick: bool,

    pub camera_info: CameraWindowState
}

impl State
{
    pub fn render(
        &mut self,
        game_state: &RefCell<GameState>,
        eguictx: &EguiCtx)
    {
        State::render_topbar(self, game_state, eguictx);
        
        CameraWindowState::render(
            self, 
            game_state, 
            eguictx);
    }

    fn render_topbar(
        state: &mut State,
        game_state: &RefCell<GameState>,
        eguictx: &EguiCtx)
    {
        let mut game_state = game_state.borrow_mut();

        egui::TopBottomPanel::top("topbar").show(
            eguictx.context(),
            |ui| {

            ui.horizontal(|ui| {
                let solar_systems = game_state.solar_systems();
                let selected_system_label = match state.current_system {
                    Some(id) => solar_systems[id].name(),
                    None => ""
                };

                egui::ComboBox::from_label("Current System")
                    .selected_text(selected_system_label)
                    .show_ui(ui, |ui| {
                
                    for (i, system) in solar_systems.iter().enumerate() {
                        ui.selectable_value(
                            &mut state.current_system,
                            Some(i),
                            system.name()
                        );
                    }
                });

                let current_system = match state.current_system {
                    Some(id) => &solar_systems[id],
                    None => return
                };
            });

            ui.horizontal(|ui| {
                ui.label(format!("Time: {: <16}", TimeMan::format_duration(game_state.timeman().seconds())));
                
                let button_seconds = [
                    1, 
                    5, 
                    30, 
                    timeman::MINUTE, 
                    timeman::MINUTE * 5, 
                    timeman::MINUTE * 30, 
                    timeman::HOUR, 
                    timeman::DAY, 
                    timeman::DAY * 5, 
                    timeman::YEAR
                ];
                let selected_button = state.auto_time;

                button_seconds.iter().for_each(|&seconds| {
                    ui.vertical(|ui| {
                        let auto_selected = match selected_button {
                            Some(o) => o == seconds,
                            None => false
                        };
                        let label = TimeMan::format_duration(seconds);

                        if ui.button(label.clone()).clicked() {
                            game_state.timeman_mut().advance(seconds);
                        }

                        if ui.add(egui::Button::new(label.clone()).selected(auto_selected)).clicked() {
                            state.auto_time = Some(seconds);
                        }
                    });
                });

                ui.checkbox(&mut state.do_auto_tick, "Auto");
            });
        });
    }
}