<?php

namespace App\Models;

use App\Models\Sym\TravelCountry;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * Kontakt-Modell — saubere Neuimplementierung auf Basis der customer-Tabelle.
 *
 * Unterschiede zum alten Customer-Modell:
 *   - Global Scope schließt zusammengeführte Duplikate (merged_into_id IS NOT NULL) aus
 *   - merged_into_id + merged_at in $fillable
 *   - mergedInto() / mergedContacts() Beziehungen
 *
 * Tabellen-Name: 'contacts' (nach Phase 2 — RENAME TABLE customer → contacts).
 *
 * @property int $id
 * @property int|null $salutation_id
 * @property string|null $title
 * @property string|null $name
 * @property string|null $firstname
 * @property Carbon|null $birthdate
 * @property string|null $company
 * @property string|null $street
 * @property string|null $zip
 * @property string|null $city
 * @property string|null $email
 * @property string|null $phone
 * @property string|null $phonebusiness
 * @property string|null $phonemobile
 * @property string|null $fax
 * @property int|null $merged_into_id
 * @property Carbon|null $merged_at
 * @property Carbon $created_at
 * @property Carbon $updated_at
 * @property-read Contact|null $mergedInto
 * @property-read Collection|Contact[] $mergedContacts
 * @property-read Collection|Lead[] $leads
 * @property-read Collection|Booking[] $bookings
 */
class Contact extends Model
{
    use HasFactory, SoftDeletes;

    protected $connection = 'mysql';

    protected $table = 'contacts';

    protected $casts = [
        'salutation_id'              => 'int',
        'credit_card_type_id'        => 'int',
        'country_id'                 => 'int',
        'merged_into_id'             => 'int',
        'birthdate'                  => 'datetime',
        'credit_card_expiration_date' => 'datetime',
        'merged_at'                  => 'datetime',
    ];

    protected $fillable = [
        'salutation_id',
        'title',
        'name',
        'firstname',
        'birthdate',
        'company',
        'street',
        'zip',
        'city',
        'email',
        'phone',
        'phonebusiness',
        'phonemobile',
        'fax',
        'bank',
        'bank_code',
        'bank_account_number',
        'credit_card_type_id',
        'credit_card_number',
        'credit_card_expiration_date',
        'participants_remarks',
        'miscellaneous_remarks',
        'country_id',
        'merged_into_id',
        'merged_at',
    ];

    /**
     * Globaler Scope: zusammengeführte Duplikate werden standardmäßig ausgeblendet.
     * Für Zugriff auf alle inkl. Duplikate: Contact::withoutGlobalScope('not_merged')
     */
    protected static function booted(): void
    {
        static::addGlobalScope('not_merged', function (Builder $query) {
            $query->whereNull('merged_into_id');
        });
    }

    // ── Beziehungen ──────────────────────────────────────────────────────────

    public function mergedInto(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(Contact::class, 'merged_into_id')
            ->withoutGlobalScope('not_merged');
    }

    public function mergedContacts(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Contact::class, 'merged_into_id')
            ->withoutGlobalScope('not_merged');
    }

    public function leads(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Lead::class, 'customer_id')->orderByDesc('created_at');
    }

    public function bookings(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Booking::class, 'customer_id')->orderByDesc('created_at');
    }

    public function salutation(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(Salutation::class);
    }

    public function travel_country(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(TravelCountry::class, 'country_id');
    }

    // ── Hilfsmethoden ────────────────────────────────────────────────────────

    public function fullName(): string
    {
        if ($this->firstname) {
            return $this->firstname . ' ' . $this->name;
        }
        return (string) $this->name;
    }

    public function isMerged(): bool
    {
        return $this->merged_into_id !== null;
    }

    public static function getCountriesArray(): \Illuminate\Support\Collection
    {
        return TravelCountry::where('is_customer_country', 1)->get()->pluck('name', 'id');
    }

    public static $salutationType = [
        1 => 'Herr',
        2 => 'Frau',
        3 => 'Divers/keine Anrede',
        4 => 'Firma',
    ];
}