<?php

namespace App\Console\Commands;

use App\Mail\DailyTaskReportMail;
use App\Models\AlertMailRule;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Mail;
use Storage;
use Smalot\PdfParser\Parser;

class SendDailyTaskReport extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'send:daily-task-report {schedule_type}';


    protected array $knownStatuses = [
        'in progress', 'new', 'closed', 'on hold', 'rejected',
        'done', 'resolved', 'confirmed', 'in specification', 'scheduled',
    ];

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Command description';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $directory = 'task_updates';
        $scheduleType = $this->argument('schedule_type');

        $mailRules = AlertMailRule::where('module', 'DailyTaskReport')
            ->where('rule_name', 'DailyTaskReportMail')
            ->where('schedule_type', $scheduleType)
            ->get();

        if (!$mailRules) {
            $this->error('Daily Task Report mail rule not found.');
            return self::FAILURE;
        }

        // Get all PDF files
        $pdfFiles = collect(Storage::disk('local')->files($directory))
            ->filter(function ($file) {
                return strtolower(pathinfo($file, PATHINFO_EXTENSION)) == 'pdf';
            })
            ->values();

        if ($pdfFiles->isEmpty()) {
            $this->info('No PDF files found.');
            return self::SUCCESS;
        }

        $parser = new Parser();
        $attachments = [];
        $rows = [];
        $sno = 1;

        $attachments = [];

        foreach ($pdfFiles as $file) {
            $fullPath = Storage::disk('local')->path($file);
            $filename = basename($file, '.pdf');

            $attachments[] = [
                'path' => Storage::disk('local')->path($file),
                'name' => basename($file),
            ];

            // Read PDF content for name/task/status
            try {
                $pdf = $parser->parseFile($fullPath);
                $text = $pdf->getText();

                \Log::info('PDF RAW TEXT: ' . $text);
            } catch (\Throwable $e) {
                $text = '';
            }

            $rows[] = [
                'sno' => $sno++,
                'name' => $this->extractNameFromFilename($filename),
                // 'project-name' => $this->extractProjectName($text),
                'project-name' => $pdf ? $this->extractProjectName($pdf) : 'Unknown project',
                'task' => $this->extractTaskTitle($text),
                'status' => $this->extractStatus($text),
                'completed' => $this->extractPercentComplete($text),
            ];

            $this->info('Attached: ' . basename($file));
        }

        $toEmails = [];
        $ccEmails = [];

        foreach ($mailRules as $mailRule) {

            // TO email
            if (!empty($mailRule->email)) {
                $toEmails[] = trim($mailRule->email);
            }

            // CC emails
            if (!empty($mailRule->cc_emails)) {

                $ccEmails = array_merge(
                    $ccEmails,
                    array_map(
                        'trim',
                        explode(',', $mailRule->cc_emails)
                    )
                );
            }
        }

        // Remove duplicate emails
        $toEmails = array_values(array_unique(array_filter($toEmails)));
        $ccEmails = array_values(array_unique(array_filter($ccEmails)));


        try {

            $mail = Mail::to($toEmails);

            if (!empty($ccEmails)) {
                $mail->cc($ccEmails);
            }

            $mail->send(
                new DailyTaskReportMail($attachments, $rows)
            );

            foreach ($pdfFiles as $file) {

                if (Storage::disk('local')->exists($file)) {
                    Storage::disk('local')->delete($file);

                    $this->info('Deleted: ' . basename($file));
                }
            }

            $this->info(
                $pdfFiles->count() . ' PDF(s) mailed and deleted successfully.'
            );

            return self::SUCCESS;

        } catch (\Throwable $e) {

            // Mail failed -> DO NOT delete PDFs
            $this->error('Mail sending failed.');
            $this->error($e->getMessage());

            return self::FAILURE;
        }
    }

    protected function extractNameFromFilename(string $filename): string
    {
        $name = preg_replace('/[-_]?task.*$/i', '', $filename);
        $name = preg_replace('/[-_]+/', ' ', $name);
        $name = preg_replace('/(?<!^)([A-Z])/', ' $1', $name);
        return trim(ucwords(strtolower($name)));
    }

    protected function extractTaskTitle(string $text): string
    {
        if (preg_match('/Task\s*#\d+\s*-\s*(.+)/i', $text, $matches)) {
            $title = trim($matches[1]);
            foreach ($this->knownStatuses as $status) {
                $pos = stripos($title, $status);
                if ($pos != false) {
                    $title = trim(substr($title, 0, $pos));
                    break;
                }
            }
            return $title;
        }
        return 'Unknown task';
    }

    protected function extractStatus(string $text): string
    {
        // Replace non-breaking spaces (common in OpenProject PDF exports) with regular spaces
        $normalized = str_replace("\xC2\xA0", ' ', $text);
        $normalized = preg_replace('/\s+/', ' ', $normalized);

        foreach ($this->knownStatuses as $status) {
            if (stripos($normalized, $status) !== false) {
                return ucwords($status);
            }
        }
        return 'Unknown';
    }

    protected function extractPercentComplete(string $text): string
    {
        $normalized = str_replace("\xC2\xA0", ' ', $text);
        $normalized = preg_replace('/[ \t]+/', ' ', $normalized);

        if (preg_match('/%\s*Complete\s*([0-9]{1,3}\s*%)/i', $normalized, $matches)) {
            return trim(str_replace(' ', '', $matches[1]));
        }

        return '0%';
    }

    // protected function extractProjectName(string $text): string
    // {
    //     $normalized = str_replace("\xC2\xA0", ' ', $text);

    //     // Footer pattern: <page#><date>\t<Project Name> at the very end of the PDF text
    //     if (preg_match('/\d{1,2}-\d{2}-\d{4}\s*\t\s*(.+?)\s*$/s', $normalized, $matches)) {
    //         return trim($matches[1]);
    //     }

    //     return 'Unknown project';
    // }

    protected function extractProjectName($pdf): string
    {
        $pages = $pdf->getPages();

        if (empty($pages)) {
            return 'Unknown project';
        }

        $firstPageText = str_replace("\xC2\xA0", ' ', $pages[0]->getText());

        if (preg_match('/\d{1,2}-\d{2}-\d{4}\s*\t\s*(.+?)\s*$/s', $firstPageText, $matches)) {
            return trim($matches[1]);
        }

        return 'Unknown project';
    }

}