<?php

namespace app\controller;

use app\Service\PdfService;
use app\Service\UsedCarService;
use Webman\Http\Request;
use Webman\Http\Response;

/**
 * 二手车控制器
 */
class UsedCarController extends BaseController
{
    private UsedCarService $service;
    private PdfService $pdfService;

    public function __construct()
    {
        $this->service = new UsedCarService();
        $this->pdfService = new PdfService();
    }

    /**
     * 获取二手车列表
     */
    public function list(Request $request): Response
    {
        $userId = $this->getUserId($request);
        $type = $request->get('type', 'self');
        $page = (int)$request->get('page', 1);
        $pageSize = (int)$request->get('page_size', 20);
        $keyword = $request->get('keyword');
        $status = $request->get('status');

        try {
            $result = $this->service->getList(
                $userId,
                $type,
                $page,
                $pageSize,
                $keyword,
                $status !== null ? (int)$status : null
            );

            return $this->success($result);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 获取二手车详情
     */
    public function detail(Request $request): Response
    {
        $userId = $this->getUserId($request);
        $id = (int)$request->get('id');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $detail = $this->service->getDetail($id, $userId);
            return $this->success($detail);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 创建二手车记录
     */
    public function create(Request $request): Response
    {
        $userId = $this->requireAuth($request);
        $data = $request->post();

        try {
            $car = $this->service->create($data, $userId);
            return $this->success($car->toArray(), '创建成功');
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 更新二手车记录
     */
    public function update(Request $request): Response
    {
        $userId = $this->requireAuth($request);
        $id = (int)$request->get('id');
        $data = $request->post();

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $car = $this->service->update($id, $data, $userId);
            return $this->success($car->toArray(), '更新成功');
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 删除二手车记录
     */
    public function delete(Request $request): Response
    {
        $userId = $this->requireAuth($request);
        $id = (int)$request->get('id');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $this->service->delete($id, $userId);
            return $this->success(null, '删除成功');
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 更新状态
     */
    public function updateStatus(Request $request): Response
    {
        $userId = $this->requireAuth($request);
        $id = (int)$request->post('id');
        $status = (int)$request->post('status');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $this->service->updateStatus($id, $status, $userId);
            return $this->success(null, '状态更新成功');
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * URL抓取车辆信息
     */
    public function crawlByUrl(Request $request): Response
    {
        $this->requireAuth($request);
        $url = $request->post('url') ?: $request->get('url');

        if (empty($url)) {
            return $this->error('URL不能为空');
        }

        try {
            $data = $this->service->crawlByUrl($url);
            return $this->success($data);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 移动端链接抓取（处理短链）
     */
    public function crawlMobileUrl(Request $request): Response
    {
        $this->requireAuth($request);
        $url = $request->post('url') ?: $request->get('url');

        if (empty($url)) {
            return $this->error('URL不能为空');
        }

        try {
            $data = $this->service->crawlByUrl($url);
            return $this->success($data);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 生成PDF
     */
    public function generatePdf(Request $request): Response
    {
        $userId = $this->requireAuth($request);
        $id = (int)$request->post('id');
        $price = (float)$request->post('price');
        $lang = $request->post('lang', 'zh');
        $currency = $request->post('currency', 'CNY');
        $tradeTerm = $request->post('trade_term', '');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        if ($price <= 0) {
            return $this->error('请输入有效的价格');
        }

        try {
            $pdfFileName = $this->pdfService->generateUsedCarPdf(
                $id,
                $userId,
                $price,
                $lang,
                $currency,
                $tradeTerm
            );

            return $this->success([
                'pdf_file_name' => $pdfFileName,
            ], 'PDF生成成功');
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 下载PDF
     */
    public function downloadPdf(Request $request): Response
    {
        $userId = $this->getUserId($request);
        $id = (int)$request->get('id');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $car = \app\Model\UsedCar::findOrFail($id);

            if (empty($car->pdf_src)) {
                return $this->error('PDF文件不存在，请先生成PDF');
            }

            $pdfPath = $this->pdfService->getPdfPath($car->pdf_src);

            if (!$this->pdfService->pdfExists($car->pdf_src)) {
                return $this->error('PDF文件不存在');
            }

            // 设置下载的文件名
            $filename = $car->product_name . '-' . $car->code . '-' . $car->id . '.pdf';

            // 返回文件下载响应
            return response()->file($pdfPath, $filename);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 获取PDF预览URL
     */
    public function getPdfUrl(Request $request): Response
    {
        $userId = $this->getUserId($request);
        $id = (int)$request->get('id');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $car = \app\Model\UsedCar::findOrFail($id);

            if (empty($car->pdf_src)) {
                return $this->error('PDF文件不存在，请先生成PDF');
            }

            if (!$this->pdfService->pdfExists($car->pdf_src)) {
                return $this->error('PDF文件不存在');
            }

            // 将PDF复制到public目录以便访问
            $publicPdfDir = public_path('pdf');
            if (!is_dir($publicPdfDir)) {
                mkdir($publicPdfDir, 0755, true);
            }

            $publicPdfPath = $publicPdfDir . '/' . $car->pdf_src;
            if (!file_exists($publicPdfPath)) {
                copy($this->pdfService->getPdfPath($car->pdf_src), $publicPdfPath);
            }

            // 构建访问URL
            $baseUrl = $this->getBaseUrl($request);
            $pdfUrl = $baseUrl . '/pdf/' . $car->pdf_src;

            return $this->success([
                'pdf_url' => $pdfUrl,
                'file_name' => $car->product_name . '-' . $car->code . '-' . $car->id . '.pdf',
            ]);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 预览PDF（直接返回PDF内容）
     */
    public function previewPdf(Request $request): Response
    {
        $id = (int)$request->get('id');

        if ($id <= 0) {
            return $this->error('无效的ID');
        }

        try {
            $car = \app\Model\UsedCar::findOrFail($id);

            if (empty($car->pdf_src)) {
                return $this->error('PDF文件不存在，请先生成PDF');
            }

            $pdfPath = $this->pdfService->getPdfPath($car->pdf_src);

            if (!$this->pdfService->pdfExists($car->pdf_src)) {
                return $this->error('PDF文件不存在');
            }

            // 返回PDF内容
            $content = file_get_contents($pdfPath);

            return response($content, 200, [
                'Content-Type' => 'application/pdf',
                'Access-Control-Allow-Origin' => '*',
                'Access-Control-Allow-Methods' => 'GET, OPTIONS',
                'Access-Control-Allow-Headers' => '*',
            ]);
        } catch (\Exception $e) {
            return $this->error($e->getMessage());
        }
    }

    /**
     * 获取基础URL
     */
    private function getBaseUrl(Request $request): string
    {
        $scheme = $request->header('x-forwarded-proto') ?? $request->header('x-scheme') ?? 'https';
        $host = $request->host();
        return $scheme . '://' . $host;
    }
}