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use abstio::{CityName, MapName};
use widgetry::{EventCtx, State};

use crate::app::App;
use crate::challenges::ChallengesPicker;
use crate::sandbox::gameplay::Tutorial;
use crate::sandbox::{GameplayMode, SandboxMode};

pub mod proposals;

pub struct TitleScreen;

impl TitleScreen {
    pub fn new_state(ctx: &mut EventCtx, app: &mut App) -> Box<dyn State<App>> {
        map_gui::tools::TitleScreen::new_state(
            ctx,
            app,
            map_gui::tools::Executable::ABStreet,
            Box::new(enter_state),
        )
    }
}

fn enter_state(ctx: &mut EventCtx, app: &mut App, args: Vec<&str>) -> Box<dyn State<App>> {
    match args[0] {
        "--tutorial-intro" => Tutorial::start(ctx, app),
        "--challenges" => ChallengesPicker::new_state(ctx, app),
        "--sandbox" => SandboxMode::simple_new(
            app,
            GameplayMode::PlayScenario(
                app.primary.map.get_name().clone(),
                default_scenario_for_map(app.primary.map.get_name()),
                Vec::new(),
            ),
        ),
        "--proposals" => proposals::Proposals::new_state(ctx, None),
        "--ungap" => {
            let layers = crate::ungap::Layers::new(ctx, app);
            crate::ungap::ExploreMap::new_state(ctx, app, layers)
        }
        "--ltn" => crate::ltn::BrowseNeighborhoods::new_state(ctx, app),
        "--devtools" => crate::devtools::DevToolsMode::new_state(ctx, app),
        _ => unreachable!(),
    }
}

pub fn default_scenario_for_map(name: &MapName) -> String {
    if name.city == CityName::seattle()
        && abstio::file_exists(abstio::path_scenario(name, "weekday"))
    {
        return "weekday".to_string();
    }
    if name.city.country == "gb" {
        for x in ["background", "base_with_bg"] {
            if abstio::file_exists(abstio::path_scenario(name, x)) {
                return x.to_string();
            }
        }
    }
    "home_to_work".to_string()
}