<?php

namespace App\Tools;

use Illuminate\Support\Str;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\App;

use Symfony\Component\Process\Process;
use Symfony\Component\Process\Exception\ProcessFailedException;

use Illuminate\Support\Facades\Cache;
use App\Tools\Export;

class ExportDownload
{
    protected $statusKey = 'export/status';
    protected $statusExpiry = 3600;
    protected $currStatusKey = '';

    protected $queryId = 'id';
    protected $realFilename = 'index'; //压缩包里的文件名
    protected $zipFilename = 'file.zip';
    protected $downloadUrl = null;

    protected $format = 'tex';
    protected $debug = false;

    protected $logs = [];

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct($options = [])
    {
        if (isset($options['format'])) {
            $this->format = $options['format'];
        }
        if (isset($options['debug'])) {
            $this->debug = $options['debug'];
        }
        if (isset($options['filename'])) {
            $this->realFilename = $options['filename'];
        }
        $this->queryId = $options['queryId'];
        $this->zipFilename = $this->queryId . '.zip';

        $this->currStatusKey = $this->statusKey . '/' . $this->queryId;
    }

    /**
     * progress: 0-1, error -1
     * message: string
     */
    public function setStatus($progress, $message = '')
    {
        $this->logs[] = $message;
        $data = [
            'progress' => $progress,
            'message' => $message,
            'log' => $this->logs,
            'content-type' => 'application/zip',
        ];
        if ($this->downloadUrl) {
            $data['url'] = $this->downloadUrl;
        }
        Cache::put(
            $this->currStatusKey,
            $data,
            $this->statusExpiry
        );
        $percent = (int)($progress * 100);
        return "[{$percent}%]" . $message;
    }


    public function getStatus()
    {
        return Cache::get($this->currStatusKey);
    }

    public function upload(string $type, $sections, $bookMeta)
    {
        $outputFilename = Str::uuid();

        $m = new \Mustache_Engine(array(
            'entity_flags' => ENT_QUOTES,
            'delimiters' => '[[ ]]',
            'escape' => function ($value) {
                return $value;
            }
        ));

        $tex = array();

        $_format = 'md';
        $tplFile = resource_path("mustache/" . $type . '/' . $_format . "/main." . $_format);
        $tpl = file_get_contents($tplFile);
        $texContent = $m->render($tpl, $bookMeta);
        $tex[] = [
            'name' => 'main.' . $_format,
            'content' => $texContent
        ];
        foreach ($sections as $key => $section) {
            $tplFile = resource_path("mustache/" . $type . '/' . $_format . "/section." . $_format);
            $tpl = file_get_contents($tplFile);
            $texContent = $m->render($tpl, $section['body']);
            $tex[] = [
                'name' => $section['name'],
                'content' => $texContent
            ];
        }

        Log::debug('footnote start');
        //footnote
        $tplFile = resource_path("mustache/" . $_format . "/footnote." . $_format);
        if (
            isset($GLOBALS['note']) &&
            is_array($GLOBALS['note']) &&
            count($GLOBALS['note']) > 0 &&
            file_exists($tplFile)
        ) {
            $tpl = file_get_contents($tplFile);
            $texContent = $m->render($tpl, ['footnote' => $GLOBALS['note']]);
            $tex[] = [
                'name' => 'footnote.' . $_format,
                'content' => $texContent
            ];
        }
        Log::debug('footnote finished');

        $this->setStatus(0.95, 'export content done. tex count=' . count($tex));
        Log::debug('export content done.', ['tex_count' => count($tex)]);

        //upload
        $fileDate = '';
        switch ($this->format) {
            case 'tex':
                $data = Export::ToPdf($tex);
                if ($data['ok']) {
                    $this->info($data['content-type']);
                    $fileDate = $data['data'];
                } else {
                    $this->error($data['code'] . '-' . $data['message']);
                }
                break;
            default:
                $file = array();
                foreach ($tex as $key => $section) {
                    $file[] = $section['content'];
                }
                $fileDate = implode('', $file);
                break;
        }


        $dir = "tmp/export/{$type}/" . $this->format . "/";
        $mdFilename = $dir . $outputFilename . '.md';
        Storage::disk('local')->put($mdFilename, $fileDate);
        Log::debug('markdown saved', ['filename' => $mdFilename]);
        if ($this->format === 'markdown') {
            $filename = $mdFilename;
        } else {
            $filename = $dir . $outputFilename . '.' . $this->format;

            Log::debug('tmp saved', ['filename' => $filename]);
            $absoluteMdPath = Storage::disk('local')->path($mdFilename);
            $absoluteOutputPath = Storage::disk('local')->path($filename);
            //$command = "pandoc pandoc1.md --reference-doc tpl.docx -o pandoc1.docx";
            $command = ['pandoc', $absoluteMdPath, '-o', $absoluteOutputPath];
            if ($this->format === 'docx') {
                $tplFile = resource_path("template/docx/paper.docx");
                array_push($command, '--reference-doc');
                array_push($command, $tplFile);
            }
            Log::debug('pandoc start', ['command' => $command, 'format' => $this->format]);
            $process = new Process($command);
            $process->run();

            if (!$process->isSuccessful()) {
                throw new ProcessFailedException($process);
            }

            echo $process->getOutput();
            Log::debug('pandoc end', ['command' => $command]);
        }

        $zipDir = storage_path('app/export/zip');
        if (!is_dir($zipDir)) {
            $res = mkdir($zipDir, 0755, true);
            if (!$res) {
                Log::error('mkdir fail path=' . $zipDir);
                return 1;
            }
        }

        $zipFile = $zipDir . '/' . $outputFilename . '.zip';

        Log::debug('export chapter start zip  file=' . $zipFile);
        //zip压缩包里面的文件名
        $realFilename = $this->realFilename . "." . $this->format;
        $fileContent = Storage::disk('local')->get($filename);
        $zipOk = \App\Tools\Tools::zip($zipFile, [$realFilename => $fileContent]);
        if (!$zipOk) {
            Log::error('export chapter zip fail zip file=' . $zipFile);
            $this->setStatus(0.99, 'export chapter zip fail');
            $this->error('export chapter zip fail zip file=' . $zipFile);
            //TODO 给客户端返回错误状态
            return 1;
        }
        $this->setStatus(0.96, 'export chapter zip success');

        $bucket = config('mint.attachments.bucket_name.temporary');
        $tmpFile =  $bucket . '/' . $this->zipFilename;
        Log::debug('upload start filename=' . $tmpFile);
        $this->setStatus(0.97, 'upload start ');
        $zipData = file_get_contents($zipFile);
        Storage::put($tmpFile, $zipData);

        if (App::environment('local')) {
            $s3Link = Storage::url($tmpFile);
        } else {
            try {
                $s3Link = Storage::temporaryUrl($tmpFile, now()->addDays(7));
            } catch (\Exception $e) {
                Log::error('export {Exception}', ['exception' => $e]);
                return false;
            }
        }
        $this->downloadUrl = $s3Link;
        $this->setStatus(1, 'export chapter done');
        Log::debug('export chapter done, upload', ['filename' => $tmpFile, 'url' => $s3Link]);
        unlink($zipFile);
        return true;
    }
}