<?php

namespace app\controller;

use app\config\Config;
use plugin\admin\app\common\ModelAutoGenerator;
use app\zlm\ZLMClient;
use support\Request;
use support\Response;

class IndexController
{
    /**
     * 页面1: 视频实时监控页面 - 返回静态HTML
     */
    public function index(Request $request): Response
    {
//        ModelAutoGenerator::generate_all();
        return redirect('/static/html/monitor.html');
    }

    /**
     * 页面2: 检测区域绘制页面 - 返回静态HTML
     */
    public function roi(Request $request): Response
    {
        return redirect('/static/html/roi.html');
    }

    /**
     * API: 获取视频流列表
     */
    public function streams(Request $request)
    {
        try {
            $zlmClient = new ZLMClient();
            $streams = $zlmClient->getMediaList();
            return json(['code' => 0, 'msg' => 'ok', 'data' => $streams]);
        } catch (\Throwable $e) {
            return json(['code' => 500, 'msg' => $e->getMessage()]);
        }
    }

    /**
     * API: 获取检测状态
     */
    public function status(Request $request)
    {
        $status = [
            'detection_enabled' => true,
            'check_interval' => 500,
            'detect_threshold' => 3,
            'cameras' => []
        ];
        return json(['code' => 0, 'msg' => 'ok', 'data' => $status]);
    }

    /**
     * API: 保存ROI配置
     */
    public function saveRoi(Request $request)
    {
        $streamKey = $request->post('stream_key');
        $roi = $request->post('roi');

        if (empty($streamKey) || empty($roi)) {
            return json(['code' => 400, 'msg' => '参数错误']);
        }

        $configFile = runtime_path() . '/roi_config/' . $streamKey . '.json';
        if (!is_dir(dirname($configFile))) {
            mkdir(dirname($configFile), 0777, true);
        }
        file_put_contents($configFile, json_encode($roi));

        return json(['code' => 0, 'msg' => '保存成功']);
    }

    /**
     * API: 获取ROI配置
     */
    public function getRoi(Request $request)
    {
        $streamKey = $request->get('stream_key');

        if (empty($streamKey)) {
            return json(['code' => 400, 'msg' => '参数错误']);
        }

        $configFile = runtime_path() . '/roi_config/' . $streamKey . '.json';
        if (file_exists($configFile)) {
            $roi = json_decode(file_get_contents($configFile), true);
            return json(['code' => 0, 'msg' => 'ok', 'data' => $roi]);
        }

        // 默认ROI
        return json(['code' => 0, 'msg' => 'ok', 'data' => [
            ['x' => 0, 'y' => 0],
            ['x' => 640, 'y' => 0],
            ['x' => 640, 'y' => 480],
            ['x' => 0, 'y' => 480]
        ]]);
    }

    /**
     * API: 代理ZLM截图请求 - 解决跨域问题
     */
    public function proxyZlmSnap(Request $request)
    {
        $app = $request->get('app');
        $stream = $request->get('stream');
        $processed = $request->get('processed'); // 是否获取处理后的帧

        if (empty($app) || empty($stream)) {
            return json(['code' => 400, 'msg' => '参数错误']);
        }

        try {
            $zlmConfig = Config::getInstance()->zlm;
            $secret = $zlmConfig->secret;

            // 构建ZLM截图URL
            $snapUrl = "{$zlmConfig->apiBaseUrl}/index/api/getSnap";
            $params = [
                'secret' => $secret,
                'app' => $app,
                'stream' => $stream,
                'timeout_sec' => 5
            ];

            $url = $snapUrl . '?' . http_build_query($params);

            // 获取截图数据
            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_TIMEOUT, 10);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

            $imageData = curl_exec($ch);
            $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            $contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
            $error = curl_error($ch);
            curl_close($ch);

            if ($httpCode !== 200 || empty($imageData)) {
                // 记录错误日志
                \plugin\admin\app\common\Logger::error("ZLM截图失败: HTTP {$httpCode}, 错误: {$error}, URL: {$url}");
                // 返回错误提示图
                return $this->generateErrorImage("截图失败: HTTP {$httpCode}");
            }

            // 如果是处理后的帧，添加标记（后续可替换为实际处理逻辑）
            if ($processed) {
                // TODO: 调用PHP处理流程处理图像
                // 目前先返回原图，但添加水印表示是"处理后"的
                $imageData = $this->addProcessedWatermark($imageData);
            }

            // 返回图片
            return response($imageData, 200, [
                'Content-Type' => $contentType ?: 'image/jpeg',
                'Cache-Control' => 'no-cache, no-store, must-revalidate',
                'Pragma' => 'no-cache',
                'Expires' => '0'
            ]);

        } catch (\Throwable $e) {
            \plugin\admin\app\common\Logger::error("ZLM截图异常: " . $e->getMessage());
            return $this->generateErrorImage("截图异常: " . $e->getMessage());
        }
    }

    /**
     * 添加"已处理"水印
     */
    private function addProcessedWatermark(string $imageData): string
    {
        // 如果安装了GD库，添加水印
        if (extension_loaded('gd')) {
            try {
                $image = imagecreatefromstring($imageData);
                if ($image) {
                    $color = imagecolorallocate($image, 233, 69, 96);
                    $font = 5; // 内置字体
                    $text = "PROCESSED";
                    imagestring($image, $font, 10, 10, $text, $color);

                    ob_start();
                    imagejpeg($image, null, 85);
                    $watermarked = ob_get_clean();
                    imagedestroy($image);

                    return $watermarked ?: $imageData;
                }
            } catch (\Throwable $e) {
                // 失败返回原图
            }
        }
        return $imageData;
    }

    /**
     * 生成错误提示图
     */
    private function generateErrorImage(string $message): Response
    {
        // 创建带错误信息的图片
        if (extension_loaded('gd')) {
            try {
                $width = 640;
                $height = 480;
                $image = imagecreatetruecolor($width, $height);
                $bgColor = imagecolorallocate($image, 10, 10, 10);
                $textColor = imagecolorallocate($image, 233, 69, 96);
                $white = imagecolorallocate($image, 255, 255, 255);

                imagefill($image, 0, 0, $bgColor);

                // 绘制边框
                imagerectangle($image, 0, 0, $width - 1, $height - 1, $textColor);

                // 绘制文字
                $lines = [
                    "视频加载失败",
                    "",
                    $message,
                    "",
                    "请检查:",
                    "1. ZLM服务是否运行",
                    "2. 视频流是否正常",
                    "3. 配置是否正确"
                ];

                $y = $height / 2 - count($lines) * 10;
                foreach ($lines as $line) {
                    $x = ($width - strlen($line) * 8) / 2;
                    imagestring($image, 3, (int)$x, (int)$y, $line, $white);
                    $y += 20;
                }

                ob_start();
                imagejpeg($image, null, 85);
                $imageData = ob_get_clean();
                imagedestroy($image);

                return response($imageData, 200, ['Content-Type' => 'image/jpeg']);
            } catch (\Throwable $e) {
                // 失败返回简单占位图
            }
        }

        // 返回1x1透明像素
        $pixel = base64_decode('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==');
        return response($pixel, 200, ['Content-Type' => 'image/png']);
    }

    public function view(Request $request)
    {
        return view('index/view', ['name' => 'webman']);
    }

}