#pragma once

#include <SDL3/SDL.h>
#include <cstdint>
#include <vector>
#include <atomic>

static constexpr float MIN_RADIUS = 124.f;
static constexpr float MAX_RADIUS = 164.f;
static constexpr float FLY_SPEED  =  42.f;
static constexpr float WALK_SPEED =  10.f;


enum class BirdState {
    IDLE,       // 0
    FLYING,     // 1
    WALKING,    // 2
    EATING,     // 3
    START_TO_FLY,   // 4
    STOP_FLYING,    // 5
    ATTACK      // 6
};

class Bird {
public:
    static std::vector<Bird*> birds;
    bool drawn;
    float altitude = 0.0f;

    float pos_x = 0;
    float pos_y = 0;

    Bird(float x, float y);

    static bool Init(SDL_Renderer*);

    void Update(double delta_s, const SDL_FPoint& player_pos);
    void Decide(const SDL_FPoint& player_pos);
    void pick_FlyTarget(const SDL_FPoint& player_pos);
    void pick_GroundTarget(const SDL_FPoint& player_pos);


    void Render(SDL_Renderer* renderer);

    void init_Landing();
    void set_State(BirdState new_state, double decision_timer);
    void set_Position(SDL_FPoint);

    BirdState get_State() const;

private:
    static std::atomic<std::uint64_t> next_id;
    std::uint64_t id;


    void set_Animation(int row, int frames, double frame_time);

    static SDL_Texture* texture;

    SDL_FPoint velocity{0.f, 0.f};
    SDL_FPoint target_pos{0.f, 0.f};

    double state_timer      = 0.0;
    double decision_timer   = 0.0;

    bool is_landing  = false;
    bool is_starting_to_fly = false;
    float landing_progress = 0.0f;
    float takeoff_progress = 0.0f;
    bool facing_left = true;
    float vertical_offset = 0.0f;
    float transition_timer = 0.0f;

    // Bird class private members
    float landing_start_y = 0.0f;   // store Y when landing starts

    float landing_start_x = 0.0f;       // Store X when landing starts
    float landing_direction = 1.0f;      // Store flight direction for landing arc
    float landing_prev_x_offset = 0.0f;
    float landing_prev_y_offset = 0.0f;


    float takeoff_direction = 1.0f;      // Store flight direction for takeoff arc
    float takeoff_prev_x_offset = 0.0f;
    float takeoff_prev_y_offset = 0.0f;




    bool reached_target = false;
    bool init_start_to_fly = false;

    static constexpr int tile_size = 16;

    BirdState state = BirdState::IDLE;

    SDL_FRect src_rect{};
    int current_frame = 0;
    int frame_count = 1;
    bool reverse_animation = false;
    int frame_step = 1;

    double frame_duration_seconds = 200;
    double animation_timer = 0;
};