use bevy::color::Color;
use bevy::math::{Vec2, Vec3};
use bevy::prelude::{default, Commands, Gizmos, Text2d, TextColor, TextFont, Transform};
use crate::states::level::components::DebugSlotNumber;
use crate::states::level::system::{SHIFT, SLOT_SIZE};
use crate::{HEIGHT, WIDTH};

const GRID_COLS: f32 = WIDTH as f32 * SHIFT;
const GRID_ROWS: f32 = HEIGHT as f32 * SHIFT;
const SLOTS_IN_ROW: u32 = WIDTH * SHIFT as u32;
const SLOTS_IN_COL: u32 = HEIGHT * SHIFT as u32;

pub fn debug_draw_grid(mut gizmos: Gizmos, mut commands: Commands) {
    let width = GRID_COLS * SLOT_SIZE;
    let height = GRID_ROWS * SLOT_SIZE;
    let half_w = width / 2.0;
    let half_h = height / 2.0;

    // Вертикальные линии сетки
    for col in 0..=GRID_COLS as u32 {
        let x = -half_w + col as f32 * SLOT_SIZE;
        gizmos.line_2d(
            Vec2::new(x, -half_h),
            Vec2::new(x, half_h),
            Color::srgba(0.4, 0.4, 0.4, 0.4),
        );
    }

    // Горизонтальные линии сетки
    for row in 0..=GRID_ROWS as u32 {
        let y = -half_h + row as f32 * SLOT_SIZE;
        gizmos.line_2d(
            Vec2::new(-half_w, y),
            Vec2::new(half_w, y),
            Color::srgba(0.4, 0.4, 0.4, 0.4),
        );
    }

    // Точки в центрах слотов (удобно для сверки логики)
    for row in 0..GRID_ROWS as u32 {
        for col in 0..GRID_COLS as u32 {
            let cx = -half_w + col as f32 * SLOT_SIZE + SLOT_SIZE / 2.0;
            let cy = -half_h + row as f32 * SLOT_SIZE + SLOT_SIZE / 2.0;
            gizmos.circle_2d(Vec2::new(cx, cy), 4.0, Color::srgba(1.0, 0.9, 0.0, 0.7));

            let coord_text = format!("{:.0}, {:.0}", cx, cy);
            commands.spawn((
                Text2d::new(cx.to_string()),
                TextFont {
                    font_size: 14.0,
                    ..default()
                },
                TextColor(Color::srgb(237.0 / 255.0, 21.0 / 255.0, 127.0 / 255.0)),
                Transform::from_translation(Vec3::new(cx, cy + 8.0, 100.0)), // z=100, чтобы было поверх всего
                DebugSlotNumber,
            ));

            commands.spawn((
                Text2d::new(cy.to_string()),
                TextFont {
                    font_size: 14.0,
                    ..default()
                },
                TextColor(Color::srgb(237.0 / 255.0, 21.0 / 255.0, 127.0 / 255.0)),
                Transform::from_translation(Vec3::new(cx, cy - 8.0, 100.0)), // z=100, чтобы было поверх всего
                DebugSlotNumber,
            ));
        }
    }
}