#include <stdio.h>
#include <math.h>
#include "raylib.h"
#include "raymath.h"

#include "bullet.h"
#include "keys.h"
#include "ninja.h"
#include "minigun.h"

typedef enum PlayerType {
    PLAYER_NINJA,
    PLAYER_MINIGUN,
    PLAYER_COUNT,
} PlayerType;

#define SCREEN_MIDDLE ((Vector2) {window_size.x/2, window_size.y/2})

Vector2 window_size = { 800.0f, 600.0f };

typedef struct Map {
    const Texture texture;
    const Rectangle box;
} Map;

Vector2 shake(int force)
{
    Vector2 s;
    s.x = GetRandomValue(-force/2, force/2);
    s.y = GetRandomValue(-force/2, force/2);
    return s;
}

void camera_bound(Camera2D *cam, Rectangle bound, float player_radius)
{
    Vector2 coord = GetScreenToWorld2D(SCREEN_MIDDLE, *cam);

    if (coord.x - player_radius < bound.x)
        cam->target.x = bound.x + player_radius;
    else if (coord.x + player_radius > bound.x + bound.width)
        cam->target.x = bound.x + bound.width - player_radius;

    if (coord.y - player_radius < bound.y)
        cam->target.y = bound.y + player_radius;
    else if (coord.y + player_radius > bound.y + bound.height)
        cam->target.y = bound.y + bound.height - player_radius;
}

int main(void)
{
    Camera2D camera = {
        .target = {0},
        .offset = SCREEN_MIDDLE,
        .rotation = 0.0f,
        .zoom = 1.0f,
    };

#ifdef RELEASE
    SetTraceLogLevel(LOG_FATAL);
#endif

    InitWindow(window_size.x, window_size.y, "voleur");
    SetWindowState(FLAG_WINDOW_RESIZABLE);
    SetTargetFPS(60);

#ifdef RELEASE
    SetExitKey(KEY_NULL);
#endif

    Map map = {
        .texture = LoadTexture("data/map2.png"),
        .box = (Rectangle) {
            .x = -map.texture.width/2, .y = -map.texture.height/2,
            .width = map.texture.width, .height = map.texture.height,
        },
    };

    change_layout_azerty();

    PlayerType player_type = PLAYER_MINIGUN;

    load_ninja();
    load_minigun();

    bullet_load();

    while (!WindowShouldClose()) {
        float DT = GetFrameTime();
        if (IsWindowResized()) {
            window_size = (Vector2) {GetScreenWidth(), GetScreenHeight()};
            camera.offset = SCREEN_MIDDLE;
        }

#ifndef RELEASE
        if (IsKeyPressed(KEY_SPACE)) {
            player_type = (player_type+1)%PLAYER_COUNT;
        }
#endif

        if (ninja_dash_time() <= EPSILON) {
            float movement_speed = 10.0f * DT * 50;
            if ((key_down(KC_UP) || key_down(KC_DOWN)) && (key_down(KC_LEFT) || key_down(KC_RIGHT)))
                movement_speed = sqrtf(movement_speed) * 2;
            if (key_down(KC_CROUCH))
                movement_speed /= 2.0f;

            if (key_down(KC_LEFT))
                camera.target.x -= movement_speed ;
            if (key_down(KC_RIGHT))
                camera.target.x += movement_speed ;
            if (key_down(KC_DOWN))
                camera.target.y -= movement_speed ;
            if (key_down(KC_UP))
                camera.target.y += movement_speed ;
        }

        camera_bound(&camera, map.box, ninja_radius());

        // NOTE: si on doit faire un screen shake, l'appliquer a cet variable
        Vector2 cam_shake = {0};

        BeginDrawing();
        {
            ClearBackground(LIME);

            Camera2D effect_camera = camera;
            effect_camera.offset = Vector2Add(effect_camera.offset, cam_shake);
            if (player_type == PLAYER_MINIGUN)
                process_minigun(Vector2Add(SCREEN_MIDDLE, cam_shake), &camera, &effect_camera);
            BeginMode2D(effect_camera);
            {
                DrawTexture(map.texture, map.box.x, map.box.y, WHITE);
                draw_bullets();
            }
            EndMode2D();
            if (player_type == PLAYER_NINJA)
                draw_ninja(Vector2Add(SCREEN_MIDDLE, cam_shake), &camera);
            else if (player_type == PLAYER_MINIGUN)
                draw_minigun(Vector2Add(SCREEN_MIDDLE, cam_shake), &camera);
        }
        EndDrawing();
    }

    CloseWindow();

    return 0;
}