<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
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\Support\Facades\DB;

class Tenant extends Model
{
    use HasFactory;

    protected $table = 'tenants';
    protected $guarded = [];

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

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

    public function photos(): HasManyThrough
    {
        return $this->hasManyThrough(
            Photo::class,
            Event::class,
            'tenant_id',
            'event_id',
            'id',
            'id'
        );
    }

    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 setSettingsAttribute($value): void
    {
        if (is_string($value)) {
            $this->attributes['settings'] = $value;
            return;
        }

        $this->attributes['settings'] = json_encode($value ?? []);
    }

    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 $relatedPurchaseId = null): bool
    {
        if ($amount <= 0) {
            return true;
        }

        $operation = function () use ($amount, $reason, $note, $relatedPurchaseId) {
            $locked = static::query()
                ->whereKey($this->getKey())
                ->lockForUpdate()
                ->first();

            if (! $locked || $locked->event_credits_balance < $amount) {
                return false;
            }

            EventCreditsLedger::create([
                'tenant_id' => $this->id,
                'delta' => -$amount,
                'reason' => $reason,
                'related_purchase_id' => $relatedPurchaseId,
                'note' => $note,
            ]);

            $locked->event_credits_balance -= $amount;
            $locked->save();

            $this->event_credits_balance = $locked->event_credits_balance;

            return true;
        };

        return $this->runCreditOperation($operation);
    }

    public function incrementCredits(int $amount, string $reason = 'manual_adjust', ?string $note = null, ?int $relatedPurchaseId = null): bool
    {
        if ($amount <= 0) {
            return true;
        }

        $operation = function () use ($amount, $reason, $note, $relatedPurchaseId) {
            $locked = static::query()
                ->whereKey($this->getKey())
                ->lockForUpdate()
                ->first();

            if (! $locked) {
                return false;
            }

            EventCreditsLedger::create([
                'tenant_id' => $this->id,
                'delta' => $amount,
                'reason' => $reason,
                'related_purchase_id' => $relatedPurchaseId,
                'note' => $note,
            ]);

            $locked->event_credits_balance += $amount;
            $locked->save();

            $this->event_credits_balance = $locked->event_credits_balance;

            return true;
        };

        return $this->runCreditOperation($operation);
    }

    private function runCreditOperation(callable $operation): bool
    {
        $connection = DB::connection();

        if ($connection->transactionLevel() > 0) {
            return (bool) $operation();
        }

        return (bool) $connection->transaction($operation);
    }
}