<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Carbon;

class CabinetTabletSetting extends Model
{
    /** @use HasFactory<\Database\Factories\CabinetTabletSettingFactory> */
    use HasFactory;

    protected $fillable = [
        'store_status',
        'notice_headline',
        'notice_subtext',
        'override_open_today',
        'override_close_today',
        'next_appointment_date',
        'next_appointment_time',
        'hours_monday_open', 'hours_monday_close',
        'hours_tuesday_open', 'hours_tuesday_close',
        'hours_wednesday_open', 'hours_wednesday_close',
        'hours_thursday_open', 'hours_thursday_close',
        'hours_friday_open', 'hours_friday_close',
        'hours_saturday_open', 'hours_saturday_close',
        'hours_sunday_open', 'hours_sunday_close',
        'contact_phone',
        'contact_email',
    ];

    protected function casts(): array
    {
        return [
            'next_appointment_date' => 'date',
        ];
    }

    private const DAYS = ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday'];

    private const GERMAN_DAY_LABELS = [
        'monday' => 'Montag',
        'tuesday' => 'Dienstag',
        'wednesday' => 'Mittwoch',
        'thursday' => 'Donnerstag',
        'friday' => 'Freitag',
        'saturday' => 'Samstag',
        'sunday' => 'Sonntag',
    ];

    /**
     * Get or create the singleton settings row.
     */
    public static function current(): self
    {
        return static::firstOrCreate(['id' => 1]);
    }

    /**
     * Get opening hours as display strings for the frontend (e.g. "10:00 – 18:00" or "Geschlossen").
     *
     * @return array<string, string>
     */
    public function getHoursArray(): array
    {
        $result = [];
        foreach (self::DAYS as $day) {
            $open = $this->{"hours_{$day}_open"};
            $close = $this->{"hours_{$day}_close"};
            $result[$day] = ($open && $close) ? "{$open} – {$close}" : 'Geschlossen';
        }

        return $result;
    }

    /**
     * Compute the effective store status based on opening hours and current Berlin time.
     *
     * Returns the display status ('open', 'closed', 'notice'), the next opening time when
     * closed, and today's closing time when open.
     *
     * @return array{status: string, today_close: string|null, next_open: array{label: string, time: string}|null}
     */
    public function computeStatus(): array
    {
        if ($this->store_status === 'notice' || $this->store_status === 'warning') {
            return ['status' => $this->store_status, 'today_close' => null, 'next_open' => null];
        }

        if ($this->store_status === 'closed') {
            $now = Carbon::now('Europe/Berlin');

            return ['status' => 'closed', 'today_close' => null, 'next_open' => $this->findNextOpenTime($now, true)];
        }

        // Auto mode: compute from opening hours
        $now = Carbon::now('Europe/Berlin');
        $dayKey = strtolower($now->englishDayOfWeek);

        $openTime = $this->override_open_today ?: $this->{"hours_{$dayKey}_open"};
        $closeTime = $this->override_close_today ?: $this->{"hours_{$dayKey}_close"};
        $currentHHMM = $now->format('H:i');

        if ($openTime && $closeTime && $currentHHMM >= $openTime && $currentHHMM < $closeTime) {
            return ['status' => 'open', 'today_close' => $closeTime, 'next_open' => null];
        }

        return ['status' => 'closed', 'today_close' => null, 'next_open' => $this->findNextOpenTime($now, false)];
    }

    /**
     * Find the next upcoming opening time from the given Berlin datetime.
     *
     * @return array{label: string, time: string}|null
     */
    private function findNextOpenTime(Carbon $now, bool $skipToday): ?array
    {
        // Check if today still has an upcoming opening (we might be before opening time)
        if (! $skipToday) {
            $dayKey = strtolower($now->englishDayOfWeek);
            $todayOpen = $this->override_open_today ?: $this->{"hours_{$dayKey}_open"};

            if ($todayOpen && $now->format('H:i') < $todayOpen) {
                return ['label' => 'Heute', 'time' => $todayOpen];
            }
        }

        // Look ahead up to 7 days
        for ($i = 1; $i <= 7; $i++) {
            $checkDate = $now->copy()->addDays($i);
            $dayKey = strtolower($checkDate->englishDayOfWeek);
            $openTime = $this->{"hours_{$dayKey}_open"};

            if ($openTime) {
                $label = $i === 1 ? 'Morgen' : self::GERMAN_DAY_LABELS[$dayKey];

                return ['label' => $label, 'time' => $openTime];
            }
        }

        return null;
    }

    /**
     * Clear override times (called by midnight scheduler).
     */
    public function clearOverrides(): void
    {
        $this->update([
            'override_open_today' => null,
            'override_close_today' => null,
        ]);
    }
}