<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\HasManyThrough;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Support\Facades\DB;
use App\Models\EventPurchase;
use App\Models\EventCreditsLedger;

class Tenant extends Model
{
    use HasFactory;

    protected $table = 'tenants';
    protected $guarded = [];
    protected $casts = [
        'name' => 'array',
        'settings' => 'array',
        'features' => 'array',
        'last_activity_at' => 'datetime',
        'event_credits_balance' => 'integer',
        'subscription_tier' => 'string',
        'subscription_expires_at' => 'datetime',
        'total_revenue' => 'decimal:2',
    ];

    public function events(): HasMany
    {
        return $this->hasMany(Event::class);
    }

    public function photos(): HasManyThrough
    {
        return $this->hasManyThrough(
            Photo::class,
            Event::class,
            'tenant_id', // Foreign key on events table...
            'event_id',  // Foreign key on photos table...
            'id',        // Local key on tenants table...
            'id'         // Local key on events table...
        );
    }

    public function purchases(): HasMany
    {
        return $this->hasMany(PurchaseHistory::class);
    }

    public function eventPurchases(): HasMany
    {
        return $this->hasMany(EventPurchase::class);
    }

    public function creditsLedger(): HasMany
    {
        return $this->hasMany(EventCreditsLedger::class);
    }

    public function activeSubscription(): Attribute
    {
        return Attribute::make(
            get: fn () => $this->subscription_expires_at && $this->subscription_expires_at->isFuture(),
        );
    }

    public function decrementCredits(int $amount, string $reason = 'event_create', ?string $note = null, ?int $relatedPurchaseId = null): bool
    {
        if ($this->event_credits_balance < $amount) {
            return false;
        }

        return DB::transaction(function () use ($amount, $reason, $note, $relatedPurchaseId) {
            EventCreditsLedger::create([
                'tenant_id' => $this->id,
                'delta' => -$amount,
                'reason' => $reason,
                'related_purchase_id' => $relatedPurchaseId,
                'note' => $note,
            ]);

            return $this->decrement('event_credits_balance', $amount);
        });
    }

    public function incrementCredits(int $amount, string $reason = 'manual_adjust', ?string $note = null, ?int $relatedPurchaseId = null): bool
    {
        return DB::transaction(function () use ($amount, $reason, $note, $relatedPurchaseId) {
            EventCreditsLedger::create([
                'tenant_id' => $this->id,
                'delta' => $amount,
                'reason' => $reason,
                'related_purchase_id' => $relatedPurchaseId,
                'note' => $note,
            ]);

            return $this->increment('event_credits_balance', $amount);
        });
    }
}