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#include <iostream>
#include <functional>
#include <string>

#include "include/ui.hpp"

using namespace std;

Button::Button(SDL_Renderer *renderer, const string custom_id, const char* staticImage, const char* readyImage, const char* clickedImage, tuple<int, int> xy) {
    buttonTextureStatic = IMG_LoadTexture(renderer, staticImage);
    buttonTextureReady = IMG_LoadTexture(renderer, readyImage);
    buttonTexturePressed = IMG_LoadTexture(renderer, clickedImage);

    // If failed to load button textures
    if (!buttonTextureStatic || !buttonTextureReady || !buttonTexturePressed) {
        cerr << "Failed to load button textures for " << custom_id << endl;
        return;
    }

    int x, y;

    buttonRect.x = get<0>(xy);
    buttonRect.y = get<1>(xy);

    SDL_QueryTexture(buttonTextureStatic, NULL, NULL, &buttonRect.w, &buttonRect.h);

    on_ready = false;
    is_clicked = false;
    onClickFunction = nullptr;

    offset_x_t = 0;
    offset_y_t = 0;
    offset_w_t = 0;
    offset_h_t = 0;
}

void Button::handleEvent(SDL_Event &event) {
    int ox, oy;
    SDL_GetMouseState(&ox, &oy);

    // If window loses focus
    if (event.type == SDL_WINDOWEVENT) {
        if (event.window.event == SDL_WINDOWEVENT_LEAVE) {
            is_clicked = false;
            on_ready = false;
        }
    }

    if (event.type == SDL_MOUSEMOTION) {
        // if button in focus
        if (ox >= (buttonRect.x + offset_x_t) && ox <= buttonRect.x + (buttonRect.w + offset_w_t) && oy >= (buttonRect.y + offset_y_t) && oy <= buttonRect.y + (buttonRect.h + offset_h_t)) {
            if (is_clicked == false) {
                on_ready = true;
            }
        }
        // if button out of focus
        else {
            if (is_clicked == false) {
                on_ready = false;
            }
        }
    }

    if (event.type == SDL_MOUSEBUTTONDOWN) {
        int x, y;
        SDL_GetMouseState(&x, &y);

        // if button pressed
        if (x >= (buttonRect.x + offset_x_t) && x <= buttonRect.x + (buttonRect.w + offset_w_t) && y >= (buttonRect.y + offset_y_t) && y <= buttonRect.y + (buttonRect.h + offset_h_t)) {
            is_clicked = true;

            if (onClickFunction)
                onClickFunction();
        }
    }
    // if left mouse button released
    else if (event.type == SDL_MOUSEBUTTONUP) {
        int x, y;
        SDL_GetMouseState(&x, &y);

        is_clicked = false;
        
        if (x >= (buttonRect.x + offset_x_t) && x <= buttonRect.x + (buttonRect.w + offset_w_t) && y >= (buttonRect.y + offset_y_t) && y <= buttonRect.y + (buttonRect.h + offset_h_t)) {
            cout << "pressed" << endl;
            on_ready = true;
        }
    }
}

void Button::render(SDL_Renderer *renderer) {
    // Rendering buttons
    if (is_clicked == true){
        SDL_RenderCopy(renderer, buttonTexturePressed, NULL, &buttonRect);
    } else if (on_ready == true) {
        SDL_RenderCopy(renderer, buttonTextureReady, NULL, &buttonRect);
    } else {
        SDL_RenderCopy(renderer, buttonTextureStatic, NULL, &buttonRect);
    }
}

void Button::setOriginImage(const string& origin) {
    // Previous coordinates to save
    int prevX = buttonRect.x;
    int prevY = buttonRect.y;

    // Correction of coordinates depending on the origin
    if      (origin == "top-left")      { buttonRect.x = prevX; buttonRect.y = prevY; }
    else if (origin == "top-center")    { buttonRect.x = prevX - buttonRect.w / 2; buttonRect.y = prevY; }
    else if (origin == "top-right")     { buttonRect.x = prevX - buttonRect.w; buttonRect.y = prevY; }
    else if (origin == "middle-left")   { buttonRect.x = prevX; buttonRect.y = prevY - buttonRect.h / 2; }
    else if (origin == "middle-center") { buttonRect.x = prevX - buttonRect.w / 2; buttonRect.y = prevY - buttonRect.h / 2; }
    else if (origin == "middle-right")  { buttonRect.x = prevX - buttonRect.w; buttonRect.y = prevY - buttonRect.h / 2; }
    else if (origin == "bottom-left")   { buttonRect.x = prevX; buttonRect.y = prevY - buttonRect.h; }
    else if (origin == "bottom-center") { buttonRect.x = prevX - buttonRect.w / 2; buttonRect.y = prevY - buttonRect.h; }
    else if (origin == "bottom-right")  { buttonRect.x = prevX - buttonRect.w; buttonRect.y = prevY - buttonRect.h; }
}

Button::~Button() {
    // Destroy all textures
    SDL_DestroyTexture(buttonTextureStatic);
    SDL_DestroyTexture(buttonTextureReady);
    SDL_DestroyTexture(buttonTexturePressed);
}