<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Storage;

class Recording extends Model
{
    /**
     * @var list<string>
     */
    protected $fillable = [
        'title',
        'original_filename',
        'file_path',
        'duration_seconds',
        'recorded_at',
        'artist',
        'album',
        'file_size_bytes',
        'transcript',
        'transcription_status',
        'transcription_progress',
        'transcription_percent',
        'transcription_started_at',
        'transcription_error',
        'transcription_driver',
        'ollama_url',
        'transcribed_at',
    ];

    /**
     * @return array<string, string>
     */
    protected function casts(): array
    {
        return [
            'recorded_at' => 'datetime',
            'transcribed_at' => 'datetime',
            'transcription_started_at' => 'datetime',
            'duration_seconds' => 'integer',
            'file_size_bytes' => 'integer',
            'transcription_percent' => 'integer',
        ];
    }

    /**
     * Human-readable duration (m:ss).
     */
    protected function durationFormatted(): Attribute
    {
        return Attribute::get(function (): string {
            if ($this->duration_seconds === null) {
                return '—';
            }

            $minutes = intdiv($this->duration_seconds, 60);
            $seconds = $this->duration_seconds % 60;

            return sprintf('%d:%02d', $minutes, $seconds);
        });
    }

    /**
     * Friendly label for the selected transcription engine.
     */
    protected function transcriptionDriverLabel(): Attribute
    {
        return Attribute::get(function (): ?string {
            return match ($this->transcription_driver) {
                'cloud' => 'Cloud (OpenAI Whisper)',
                'local' => 'Local (faster-whisper)',
                'ollama' => 'Ollama host',
                default => $this->transcription_driver,
            };
        });
    }

    /**
     * Whether transcription is actively running or queued.
     */
    public function isTranscribing(): bool
    {
        return in_array($this->transcription_status, ['pending', 'processing'], true);
    }

    /**
     * Update the live progress fields shown in the UI.
     */
    public function reportProgress(string $message, int $percent, string $status = 'processing'): void
    {
        $this->forceFill([
            'transcription_status' => $status,
            'transcription_progress' => $message,
            'transcription_percent' => max(0, min(100, $percent)),
            'transcription_error' => null,
        ])->save();
    }

    /**
     * Absolute filesystem path for the stored audio file.
     */
    public function absolutePath(): string
    {
        return Storage::disk('local')->path($this->file_path);
    }

    /**
     * Delete the audio file from storage.
     */
    public function deleteFile(): void
    {
        if ($this->file_path && Storage::disk('local')->exists($this->file_path)) {
            Storage::disk('local')->delete($this->file_path);
        }
    }

    /**
     * Payload for the live status endpoint / Alpine poller.
     *
     * @return array<string, mixed>
     */
    public function transcriptionStatusPayload(): array
    {
        $startedAt = $this->transcription_started_at;
        $elapsed = $startedAt ? $startedAt->diffInSeconds(now()) : null;

        return [
            'id' => $this->id,
            'status' => $this->transcription_status,
            'progress' => $this->transcription_progress,
            'percent' => $this->transcription_percent,
            'driver' => $this->transcription_driver,
            'driver_label' => $this->transcription_driver_label,
            'error' => $this->transcription_error,
            'started_at' => $startedAt?->toIso8601String(),
            'elapsed_seconds' => $elapsed,
            'elapsed_human' => $elapsed === null ? null : $this->formatElapsed($elapsed),
            'duration_seconds' => $this->duration_seconds,
            'is_active' => $this->isTranscribing(),
            'has_transcript' => filled($this->transcript),
            'transcribed_at' => $this->transcribed_at?->toIso8601String(),
        ];
    }

    private function formatElapsed(int $seconds): string
    {
        $minutes = intdiv($seconds, 60);
        $remain = $seconds % 60;

        if ($minutes === 0) {
            return sprintf('%ds', $remain);
        }

        return sprintf('%dm %02ds', $minutes, $remain);
    }
}