<?php

namespace App\Support;

use App\Models\Wash;

class WashCycleProgress
{
    /**
     * @return array<string, mixed>|null
     */
    public static function forWash(Wash $wash): ?array
    {
        if (! in_array($wash->status, ['pending_start', 'running', 'active'], true)) {
            return null;
        }

        $wash->loadMissing('machine');
        $machine = $wash->machine;
        $startedAt = $wash->started_at ?? $wash->created_at;
        $endsAt = $machine?->cycle_ends_at;

        if ($startedAt === null) {
            return [
                'percent' => 0,
                'phase' => 'pending',
                'phase_label' => 'En attente de démarrage',
                'estimated_end_at' => $endsAt?->toIso8601String(),
                'remaining_seconds' => null,
            ];
        }

        $totalSeconds = $endsAt !== null
            ? max(1, (int) $startedAt->diffInSeconds($endsAt))
            : max(1, ($wash->duration_minutes ?? 45) * 60);

        $elapsed = max(0, (int) $startedAt->diffInSeconds(now()));
        $percent = min(99, (int) round(($elapsed / $totalSeconds) * 100));

        [$phase, $phaseLabel] = self::phaseForPercent($percent, $machine?->type);

        $remainingSeconds = $endsAt !== null
            ? max(0, (int) now()->diffInSeconds($endsAt, false))
            : max(0, $totalSeconds - $elapsed);

        return [
            'percent' => $percent,
            'phase' => $phase,
            'phase_label' => $phaseLabel,
            'estimated_end_at' => $endsAt?->toIso8601String(),
            'remaining_seconds' => $remainingSeconds,
        ];
    }

    /**
     * @return array{0: string, 1: string}
     */
    private static function phaseForPercent(int $percent, ?string $type): array
    {
        $isDryer = str_starts_with($type ?? '', 'dryer');

        if ($percent < 5) {
            return ['lock', 'Verrouillage'];
        }

        if ($isDryer) {
            if ($percent < 15) {
                return ['heat', 'Préchauffage'];
            }
            if ($percent < 85) {
                return ['dry', 'Séchage'];
            }

            return ['finish', 'Refroidissement'];
        }

        if ($percent < 15) {
            return ['fill', 'Remplissage'];
        }
        if ($percent < 55) {
            return ['wash', 'Lavage'];
        }
        if ($percent < 75) {
            return ['rinse', 'Rinçage'];
        }
        if ($percent < 90) {
            return ['spin', 'Essorage'];
        }

        return ['finish', 'Finition'];
    }

    public static function estimateDurationMinutes(?string $machineType): int
    {
        $simSeconds = (int) config('laverie.simulation.cycle_duration_seconds', 30);

        if ($simSeconds >= 120) {
            return max(1, (int) ceil($simSeconds / 60));
        }

        return match (true) {
            str_starts_with($machineType ?? '', 'dryer_large') => 55,
            str_starts_with($machineType ?? '', 'dryer') => 45,
            str_starts_with($machineType ?? '', 'washer_large') => 50,
            default => 40,
        };
    }
}