<?php

namespace app\common\tools;

use app\model\Post;
use app\model\PostOutput;
use app\model\PostOutputFile;
use think\facade\App;

class PhoneImage implements PostOutputManagerInterface
{
    /**
     * 返回配置字段定义
     */
    public function getConfigFields(): array
    {
        return [
            'template' => ['type' => 'select', 'options' => ['minimal', 'magazine', 'mixed'], 'default' => 'minimal'],
            'size' => ['type' => 'select', 'options' => ['xiaohongshu', 'douyin'], 'default' => 'xiaohongshu'],
            'font' => ['type' => 'select', 'options' => ['source-han-sans', 'alibaba-puhuiti', 'lxgw-wenkai'], 'default' => 'source-han-sans'],
            'font_size' => ['type' => 'number', 'default' => 14, 'min' => 10, 'max' => 24],
            'watermark' => ['type' => 'text', 'default' => ''],
        ];
    }

    /**
     * 验证配置合法性
     */
    public function validateConfig(array $config): bool
    {
        $fields = $this->getConfigFields();

        if (isset($config['template']) && !in_array($config['template'], $fields['template']['options'])) {
            return false;
        }
        if (isset($config['size']) && !in_array($config['size'], $fields['size']['options'])) {
            return false;
        }
        if (isset($config['font']) && !in_array($config['font'], $fields['font']['options'])) {
            return false;
        }
        if (isset($config['font_size'])) {
            $size = intval($config['font_size']);
            if ($size < $fields['font_size']['min'] || $size > $fields['font_size']['max']) {
                return false;
            }
        }

        return true;
    }

    /**
     * 执行输出处理 - 服务端接收base64数据，保存文件，创建记录
     * 注意：HTML渲染在前端完成(html2canvas)，服务端只做文件保存和记录创建
     */
    public function process(Post $post, array $config): array
    {
        return [];
    }

    /**
     * 返回预览HTML - 预览在前端完成，服务端返回空
     */
    public function getPreview(Post $post, array $config): string
    {
        return '';
    }

    /**
     * 保存单页图片
     * @param int $outputId 输出记录ID
     * @param int $page 页码(从1开始)
     * @param string $imageData base64编码的图片数据
     * @return PostOutputFile|false
     */
    public function savePageImage(int $outputId, int $page, string $imageData)
    {
        $imageData = str_replace('data:image/jpeg;base64,', '', $imageData);
        $imageData = str_replace('data:image/png;base64,', '', $imageData);
        $imageData = str_replace(' ', '+', $imageData);
        $decoded = base64_decode($imageData);

        if ($decoded === false) {
            return false;
        }

        $dateDir = date('Ymd');
        $relativeDir = '/upload/post_output/' . $dateDir;
        $fileName = $outputId . '_' . $page . '.jpg';
        $relativePath = $relativeDir . '/' . $fileName;
        $fullDir = App::getRootPath() . '/public' . $relativeDir;
        $fullPath = $fullDir . '/' . $fileName;

        if (!is_dir($fullDir)) {
            mkdir($fullDir, 0777, true);
        }

        file_put_contents($fullPath, $decoded);

        $imageInfo = getimagesize($fullPath);
        $width = $imageInfo[0] ?? 0;
        $height = $imageInfo[1] ?? 0;

        $fileRecord = PostOutputFile::create([
            'output_id' => $outputId,
            'page' => $page,
            'file_path' => $relativePath,
            'file_url' => $relativePath,
            'file_size' => strlen($decoded),
            'width' => $width,
            'height' => $height,
        ]);

        return $fileRecord;
    }

    /**
     * 打包某条输出记录的所有图片为ZIP
     * @param int $outputId
     * @return string ZIP文件路径
     * @throws \Exception
     */
    public function createZip(int $outputId): string
    {
        $output = PostOutput::find($outputId);
        if (!$output) {
            throw new \Exception('输出记录不存在');
        }

        $files = PostOutputFile::where('output_id', $outputId)
            ->order('page', 'asc')
            ->select();

        if ($files->isEmpty()) {
            throw new \Exception('没有可下载的文件');
        }

        $tempDir = App::getRuntimePath() . 'temp';
        if (!is_dir($tempDir)) {
            mkdir($tempDir, 0777, true);
        }

        $zipFileName = 'post_output_' . $outputId . '.zip';
        $zipPath = $tempDir . '/' . $zipFileName;

        $zip = new \ZipArchive();
        if ($zip->open($zipPath, \ZipArchive::CREATE | \ZipArchive::OVERWRITE) !== true) {
            throw new \Exception('无法创建ZIP文件');
        }

        foreach ($files as $file) {
            $filePath = App::getRootPath() . '/public' . $file->file_path;
            if (file_exists($filePath)) {
                $pageName = str_pad((string) $file->page, 2, '0', STR_PAD_LEFT) . '.jpg';
                $zip->addFile($filePath, $pageName);
            }
        }

        $zip->close();

        return $zipPath;
    }

    /**
     * 删除输出记录及所有关联文件
     * @param int $outputId
     * @return bool
     */
    public function deleteOutput(int $outputId): bool
    {
        $files = PostOutputFile::where('output_id', $outputId)->select();

        foreach ($files as $file) {
            $filePath = App::getRootPath() . '/public' . $file->file_path;
            if (file_exists($filePath)) {
                @unlink($filePath);
            }
        }

        PostOutputFile::where('output_id', $outputId)->delete();
        PostOutput::destroy($outputId);

        return true;
    }

    /**
     * 创建输出记录
     * @param int $postId 文章ID
     * @param array $config 配置
     * @param int $adminId 管理员ID
     * @return PostOutput
     */
    public function createOutput(int $postId, array $config, int $adminId): PostOutput
    {
        return PostOutput::create([
            'post_id' => $postId,
            'output_type' => 'phone_image',
            'config' => $config,
            'status' => PostOutput::STATUS_PROCESSING,
            'page_count' => 0,
            'admin_id' => $adminId,
        ]);
    }

    /**
     * 完成输出记录 - 更新状态和页数
     */
    public function completeOutput(int $outputId, int $pageCount): bool
    {
        return PostOutput::where('id', $outputId)->update([
            'status' => PostOutput::STATUS_COMPLETED,
            'page_count' => $pageCount,
        ]) > 0;
    }
}