use crate::constants::{SIDEBAR_POS_X, SIDEBAR_POS_Y};
use crate::resources::{Clock, LevelNumber, ShowDebugInfo, Stats};
use crate::vga_color as vga;
use bracket_lib::prelude::*;
use specs::prelude::*;

pub fn draw(ecs: &World, ctx: &mut BTerm) {
    // Blue background
    ctx.fill_region(
        Rect {
            x1: SIDEBAR_POS_X,
            x2: SIDEBAR_POS_X + 14,
            y1: SIDEBAR_POS_Y,
            y2: SIDEBAR_POS_Y + 19,
        },
        to_cp437(' '),
        RGB::named(vga::YELLOW_BRIGHT),
        RGB::named(vga::BLUE),
    );

    // Gray number boxes
    (1..17).step_by(3).for_each(|y| {
        ctx.fill_region(
            Rect {
                x1: SIDEBAR_POS_X + 3,
                x2: SIDEBAR_POS_X + 10,
                y1: SIDEBAR_POS_Y + y,
                y2: SIDEBAR_POS_Y + y + 1,
            },
            to_cp437(' '),
            RGB::named(vga::RED),
            RGB::named(vga::WHITE),
        );
    });

    // Stats
    ctx.print(SIDEBAR_POS_X + 4, SIDEBAR_POS_Y, "Score");
    ctx.print(SIDEBAR_POS_X + 4, SIDEBAR_POS_Y + 3, "Level");
    ctx.print_centered_at(
        SIDEBAR_POS_X + 6,
        SIDEBAR_POS_Y + 4,
        ecs.read_resource::<LevelNumber>().0,
    );
    ctx.print(SIDEBAR_POS_X + 4, SIDEBAR_POS_Y + 6, "Gems");
    ctx.print(SIDEBAR_POS_X + 4, SIDEBAR_POS_Y + 9, "Whips");
    ctx.print(SIDEBAR_POS_X + 2, SIDEBAR_POS_Y + 12, "Teleports");
    ctx.print(SIDEBAR_POS_X + 4, SIDEBAR_POS_Y + 15, "Keys");

    let stats = ecs.read_resource::<Stats>();
    ctx.print_centered_at(SIDEBAR_POS_X + 6, SIDEBAR_POS_Y + 1, stats.score);
    ctx.print_centered_at(SIDEBAR_POS_X + 6, SIDEBAR_POS_Y + 7, stats.gems);
    ctx.print_centered_at(SIDEBAR_POS_X + 6, SIDEBAR_POS_Y + 10, stats.whips);
    ctx.print_centered_at(SIDEBAR_POS_X + 6, SIDEBAR_POS_Y + 13, stats.teleports);
    ctx.print_centered_at(SIDEBAR_POS_X + 6, SIDEBAR_POS_Y + 16, stats.keys);

    // Hotkey list
    ctx.print_color(
        SIDEBAR_POS_X + 3,
        SIDEBAR_POS_Y + 18,
        RGB::named(vga::CYAN_BRIGHT),
        RGB::named(vga::RED),
        "OPTIONS",
    );

    ctx.fill_region(
        Rect {
            x1: SIDEBAR_POS_X,
            x2: SIDEBAR_POS_X + 14,
            y1: SIDEBAR_POS_Y + 19,
            y2: SIDEBAR_POS_Y + 25,
        },
        to_cp437(' '),
        RGB::named(vga::WHITE),
        RGB::named(vga::BLUE),
    );

    ctx.fill_region(
        Rect {
            x1: SIDEBAR_POS_X + 3,
            x2: SIDEBAR_POS_X + 4,
            y1: SIDEBAR_POS_Y + 19,
            y2: SIDEBAR_POS_Y + 25,
        },
        to_cp437(' '),
        RGB::named(vga::WHITE_BRIGHT),
        RGB::named(vga::BLUE),
    );

    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 19, "Whip");
    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 20, "Teleport");
    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 21, "Pause");
    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 22, "Quit");
    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 23, "Save");
    ctx.print(SIDEBAR_POS_X + 3, SIDEBAR_POS_Y + 24, "Restore");

    if ecs.read_resource::<ShowDebugInfo>().0 {
        ctx.print_color_right(
            SIDEBAR_POS_X + 14,
            SIDEBAR_POS_Y,
            RGB::named(vga::GREEN_BRIGHT),
            RGB::named(vga::BLACK),
            &format!("{}", ctx.fps),
        );

        ctx.print_color(
            0,
            0,
            RGB::named(vga::YELLOW_BRIGHT),
            RGB::named(vga::BLACK),
            &format!("{}", ecs.read_resource::<Clock>().ticks),
        );
    }
}