#include <stdlib.h>
#include <math.h>
#include "constants.h"
#include "game.h"
#include "player.h"
#include "physics.h"
#include "assets.h"
#include "utils.h"

extern Game game;

#define PLAYER_SPEED 300.0f

const Rectangle shadowDestRect = (Rectangle) {
    .x = 0,
    .y = 100,
    .width = 100,
    .height = 40
};

const Rectangle physicsCollider = (Rectangle) {
    .x = 0,
    .y = 0,
    .width = 100,
    .height = 100
};

Vector2 GetMovementDirection() {
    Vector2 movementDirection = {0.0f, 0.0f};

    if (IsKeyDown(KEY_W)) {
        movementDirection.y = -1.0f;
    } else if (IsKeyDown(KEY_S)) {
        movementDirection.y = 1.0f;
    }

    if (IsKeyDown(KEY_A)) {
        movementDirection.x = -1.0f;
    } else if (IsKeyDown(KEY_D)) {
        movementDirection.x = 1.0f;
    }

    if (Vector2Length(movementDirection) > 0.0f)
        return Vector2Normalize(movementDirection);

    return movementDirection;
}

void CameraFollow(const Entity* player) {
    game.camera.target =
        (Vector2) {fmaxf(WINDOW_WIDTH / 2.0f, player->position.x), 0.0f};
}

void UpdatePlayer(Entity* player, float deltaTime) {
    player->velocity =
        Vector2Scale(GetMovementDirection(), PLAYER_SPEED);

    MoveAndSlide(player, deltaTime);

    CameraFollow(player);
}

void AddPlayer(float xpos, float ypos) {
    Entity player = {0};
    player.type = Player_Entity;

    player.position = (Vector2) {xpos, ypos};
    player.flags |= (ENTITY_PHYSICS_ACTIVE | ENTITY_VISIBLE);

    player.physicsCollider = physicsCollider;

    #ifdef BEATEMUP_DEBUG
        player.physicsColliderColor = RED;
    #endif

    Asset* shadowTexture = GetMatchingAssetWithType("human-shadow", Texture_Asset);

    if (shadowTexture == NULL) {
        TraceLog(LOG_ERROR, "Failed to find texture asset human-shadow, exitting!");
        exit(EXIT_FAILURE);
    }

    AddSpriteToEntity(&player, (Sprite){
            .texture = shadowTexture->texture,
            .layer = Foreground_Layer,
            .destRect = shadowDestRect
        });

    AddEntity(&player);
}