/**
 * @file hello_world.cpp
 * @brief Hello World 示例程序
 */

#include <extra2d/app/application.h>
#include <extra2d/platform/window_module.h>
#include <extra2d/core/service_locator.h>
#include <extra2d/services/logger_service.h>
#include <extra2d/render/renderer.h>
#include <extra2d/core/color.h>
#include <extra2d/core/math_types.h>
#include <iostream>

using namespace extra2d;

int main(int argc, char* argv[]) {
    std::cout << "========================================" << std::endl;
    std::cout << "  Extra2D - Hello World Example" << std::endl;
    std::cout << "========================================" << std::endl;
    
    auto& app = Application::get();
    app.appName = "Hello World - Extra2D";
    app.appVersion = "1.0.0";
    
    app.use<WindowModule>([](WindowCfg& cfg) {
        cfg.title = "Hello World - Extra2D";
        cfg.w = 1024;
        cfg.h = 768;
        cfg.vsync = true;
    });
    
    if (!app.init()) {
        std::cerr << "Failed to initialize application" << std::endl;
        return 1;
    }
    
    auto logger = ServiceLocator::instance().get<ILogger>();
    if (logger) {
        logger->info("Hello World example initialized");
    }
    
    auto renderer = IRenderer2D::create(true);
    if (!renderer) {
        std::cerr << "Failed to create renderer" << std::endl;
        return 1;
    }
    
    auto window = app.window();
    if (!window) {
        std::cerr << "Failed to get window" << std::endl;
        return 1;
    }
    
    if (!renderer->init(window->native())) {
        std::cerr << "Failed to initialize renderer" << std::endl;
        return 1;
    }
    
    if (logger) {
        logger->info("Renderer: %s (Vulkan: %s)", 
                    renderer->backendName(),
                    renderer->isVulkan() ? "yes" : "no");
    }
    
    float totalTime = 0.0f;
    
    while (app.running() && !window->shouldClose()) {
        float dt = app.dt();
        totalTime += dt;
        
        renderer->beginFrame();
        
        i32 width = renderer->width();
        i32 height = renderer->height();
        
        Viewport viewport;
        viewport.x = 0;
        viewport.y = 0;
        viewport.width = width;
        viewport.height = height;
        renderer->setViewport(viewport);
        
        ClearCommand clearCmd;
        clearCmd.color = Color(20, 20, 30, 255);
        clearCmd.clearColor = true;
        clearCmd.clearDepth = true;
        renderer->clear(clearCmd);
        
        float centerX = static_cast<float>(width) / 2.0f;
        float centerY = static_cast<float>(height) / 2.0f;
        
        float pulse = 0.5f + 0.5f * std::sin(totalTime * 2.0f);
        Color textColor(
            static_cast<u8>(100 + 155 * pulse),
            static_cast<u8>(200 + 55 * pulse),
            static_cast<u8>(255),
            255
        );
        
        float rectWidth = 320.0f;
        float rectHeight = 70.0f;
        float rectX = centerX - rectWidth / 2;
        float rectY = centerY - rectHeight / 2;
        
        Color rectColor(50, 50, 70, 255);
        renderer->drawRect(Vec2{rectX, rectY}, Vec2{rectWidth, rectHeight}, rectColor, true);
        
        Color borderColor(
            static_cast<u8>(100 + 100 * pulse), 
            static_cast<u8>(180 + 50 * pulse), 
            255, 
            255
        );
        renderer->drawRect(Vec2{rectX, rectY}, Vec2{rectWidth, rectHeight}, borderColor, false);
        
        for (int i = 0; i < 5; ++i) {
            float x = 100.0f + i * 200.0f;
            float y = static_cast<float>(height) - 50.0f;
            float radius = 20.0f;
            
            float phase = totalTime * 1.5f + i * 0.5f;
            float offsetY = std::sin(phase) * 20.0f;
            
            Color circleColor(
                static_cast<u8>(50 + i * 30),
                static_cast<u8>(100 + i * 20),
                static_cast<u8>(150 + i * 20),
                200
            );
            
            renderer->drawCircle(Vec2{x, y + offsetY}, radius, circleColor, true, 16);
        }
        
        renderer->flushBatch();
        renderer->endFrame();
        renderer->present();
        
        window->poll();
    }
    
    renderer->shutdown();
    app.shutdown();
    
    std::cout << "Application terminated successfully" << std::endl;
    return 0;
}