<?php

namespace App\Http\Controllers\User;

use App\Http\Controllers\Controller;
use App\Http\Requests\User\UpdateTranscriptRequest;
use App\Http\Requests\User\UploadExternalTranscriptRequest;
use App\Jobs\OllamaPostProcessJob;
use App\Models\TranscriptVersion;
use App\Models\TranscriptionProject;
use App\Services\AuditLogService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\Auth;

class TranscriptController extends Controller
{
    /**
     * Simpan perubahan teks transkripsi dan cipta versi baru.
     */
    public function update(
        UpdateTranscriptRequest $request,
        TranscriptionProject $project,
        AuditLogService $audit
    ): RedirectResponse {
        $this->authorize('editTranscript', $project);

        $oldText = $project->transcript_text;

        $nextVersion = ($project->transcriptVersions()->max('version_number') ?? 0) + 1;

        TranscriptVersion::create([
            'project_id'     => $project->id,
            'edited_by'      => Auth::id(),
            'version_number' => $nextVersion,
            'old_text'       => $oldText,
            'new_text'       => $request->transcript_text,
            'change_summary' => $request->change_summary ?? 'Dikemaskini oleh pengguna',
            'created_at'     => now(),
        ]);

        $project->update([
            'transcript_text'      => $request->transcript_text,
            'transcription_status' => 'completed',
        ]);

        $audit->log('transcript_edited', [
            'project_id'     => $project->id,
            'new_values'     => ['version_number' => $nextVersion],
        ]);

        return back()->with('success', 'Transkripsi berjaya disimpan.');
    }

    /**
     * Muat naik fail transkripsi .txt dari luar sistem.
     */
    public function uploadExternal(
        UploadExternalTranscriptRequest $request,
        TranscriptionProject $project,
        AuditLogService $audit
    ): RedirectResponse {
        $this->authorize('editTranscript', $project);

        $text = file_get_contents($request->file('transcript_file')->getRealPath());

        // Bersihkan BOM dan normalkan line endings
        $text = preg_replace('/^\xef\xbb\xbf/', '', $text);
        $text = str_replace(["\r\n", "\r"], "\n", $text);
        $text = trim($text);

        if ($text === '') {
            return back()->withErrors(['transcript_file' => 'Fail transkripsi kosong.']);
        }

        $oldText     = $project->transcript_text;
        $nextVersion = ($project->transcriptVersions()->max('version_number') ?? 0) + 1;

        TranscriptVersion::create([
            'project_id'     => $project->id,
            'edited_by'      => Auth::id(),
            'version_number' => $nextVersion,
            'old_text'       => $oldText,
            'new_text'       => $text,
            'change_summary' => 'Transkripsi dimuat naik secara manual',
            'created_at'     => now(),
        ]);

        $project->update([
            'transcript_text'      => $text,
            'transcription_status' => 'completed',
            'transcription_engine' => 'manual',
            'processed_at'         => $project->processed_at ?? now(),
        ]);

        $audit->log('transcript_uploaded_external', [
            'project_id' => $project->id,
            'new_values' => ['version_number' => $nextVersion],
        ]);

        // Hantar ke Ollama jika pengguna minta dan Ollama dikonfigurasi
        if ($request->boolean('clean_with_ollama') && config('speech2text.ollama.enabled')) {
            OllamaPostProcessJob::dispatch($project);
        }

        $msg = 'Transkripsi berjaya dimuat naik.';
        if ($request->boolean('clean_with_ollama') && config('speech2text.ollama.enabled')) {
            $msg .= ' Pembersihan Ollama sedang diproses.';
        }

        return back()->with('success', $msg);
    }
}