#include <thread>
#include <chrono>

#include "SDL3/SDL_init.h"
#include "SDL3/SDL_render.h"
#include "SDL3/SDL_video.h"
#include "SDL3/SDL_log.h"
#include "SDL3/SDL_timer.h"
#include "SDL3/SDL_gpu.h"
#include "SDL3_ttf/SDL_ttf.h"

int main(int argc, char* argv[]) {
    SDL_Init(SDL_INIT_VIDEO);
    SDL_Window* window = SDL_CreateWindow("Hello World", 640, 480, 0);
    if (window == nullptr) {
        SDL_Log("Could not create window: %s", SDL_GetError());
        return 1;
    }
    SDL_Renderer* renderer = SDL_CreateRenderer(window, "direct3d12,metal,vulkan");
    if (renderer == nullptr) {
        SDL_Log("Could not create renderer: %s", SDL_GetError());
        SDL_DestroyWindow(window);
        return 1;
    }
    auto gpu_device = (SDL_GPUDevice*)SDL_GetPointerProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_GPU_DEVICE_POINTER, NULL);

    TTF_Init();

    TTF_Font* font = TTF_OpenFont("C:/Windows/Fonts/msyh.ttc", 24);
    if (font == nullptr) {
        SDL_Log("Could not open font: %s", SDL_GetError());
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
        return 1;
    }
    // 设置字体hinting为轻量级
    TTF_SetFontHinting(font, TTF_HINTING_LIGHT_SUBPIXEL);
    // 设置字体为 SDF 模式
    // TTF_SetFontSDF(font, true);
    // 设置渲染器的混合模式
    SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);

    SDL_Color color = { 255, 255, 255, 255 };  // 白色文字
    SDL_Color bg_color = { 0, 0, 0, 255 };  // 背景颜色
    auto text_surface = TTF_RenderText_LCD_Wrapped(font, "Hello World!\n你好，世界！🆒", 0, color, bg_color, 0);
    if (text_surface == nullptr) {
        SDL_Log("Could not render text: %s", SDL_GetError());
        TTF_CloseFont(font);
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
        return 1;
    }

    SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
    SDL_DestroySurface(text_surface);  // 释放surface

    if (texture == nullptr) {
        SDL_Log("Could not create texture: %s", SDL_GetError());
        TTF_CloseFont(font);
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
        return 1;
    }

    // SDL3 新方法获取纹理尺寸
    float text_width, text_height;
    SDL_GetTextureSize(texture, &text_width, &text_height);
    SDL_FRect dest_rect = { 0, 0, text_width, text_height };

    SDL_GPUShaderCreateInfo shader_info;
    shader_info.code_size = 10;
    shader_info.code = nullptr; // 这里需要填入实际的着色器代码
    shader_info.entrypoint = "main";
    shader_info.format = SDL_GPU_SHADERFORMAT_DXIL;
    shader_info.stage = SDL_GPU_SHADERSTAGE_FRAGMENT;
    shader_info.num_samplers = 0;
    shader_info.num_storage_textures = 0;
    shader_info.num_uniform_buffers = 0;
    shader_info.num_storage_buffers = 0;
    auto shader = SDL_CreateGPUShader(gpu_device, &shader_info);

    SDL_GPURenderStateDesc desc;
    SDL_INIT_INTERFACE(&desc);
    desc.fragment_shader = shader;
    auto render_state = SDL_CreateGPURenderState(renderer, &desc);

    SDL_Event e;
    bool running = true;
    while (running) {
        while (SDL_PollEvent(&e)) {
            if (e.type == SDL_EVENT_QUIT) {
                running = false;
            }
        }

        // 正确的渲染顺序
        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);             // 黑色背景
        SDL_RenderClear(renderer);                                  // 先清屏
        SDL_RenderTexture(renderer, texture, nullptr, &dest_rect);  // 然后绘制文字
        SDL_RenderPresent(renderer);                                // 最后呈现
        SDL_RenderLines(renderer, nullptr, 0);                      // 确保没有多余的线条
        std::this_thread::sleep_for(std::chrono::milliseconds(16)); // ~60 FPS
    }

    // 清理资源
    SDL_DestroyTexture(texture);
    TTF_CloseFont(font);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    TTF_Quit();
    SDL_Quit();

    return 0;
}