<?php

namespace App\Services\Paddle;

use App\Models\Tenant;
use App\Services\Paddle\Exceptions\PaddleException;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Log;

class PaddleCustomerService
{
    public function __construct(private readonly PaddleClient $client) {}

    public function ensureCustomerId(Tenant $tenant): string
    {
        if ($tenant->paddle_customer_id) {
            return $tenant->paddle_customer_id;
        }

        $email = $tenant->contact_email ?: ($tenant->user?->email ?? null);

        $payload = [
            'email' => $email,
            'name' => $tenant->name,
        ];

        if (! $payload['email']) {
            throw new PaddleException('Tenant email address required to create Paddle customer.');
        }

        try {
            $response = $this->client->post('/customers', $payload);
        } catch (PaddleException $exception) {
            $existingCustomerId = $this->resolveExistingCustomerId($tenant, $email, $exception);
            if ($existingCustomerId) {
                $tenant->forceFill(['paddle_customer_id' => $existingCustomerId])->save();

                return $existingCustomerId;
            }

            throw $exception;
        }

        $customerId = Arr::get($response, 'data.id') ?? Arr::get($response, 'id');

        if (! $customerId) {
            Log::error('Paddle customer creation returned no id', ['tenant' => $tenant->id, 'response' => $response]);
            throw new PaddleException('Failed to create Paddle customer.');
        }

        $tenant->forceFill(['paddle_customer_id' => $customerId])->save();

        return $customerId;
    }

    protected function resolveExistingCustomerId(Tenant $tenant, string $email, PaddleException $exception): ?string
    {
        if ($exception->status() !== 409 || Arr::get($exception->context(), 'error.code') !== 'customer_already_exists') {
            return null;
        }

        $response = $this->client->get('/customers', [
            'email' => $email,
            'per_page' => 1,
        ]);

        $customerId = Arr::get($response, 'data.0.id') ?? Arr::get($response, 'data.0.customer_id');

        if (! $customerId) {
            Log::warning('Paddle customer lookup by email returned no id', [
                'tenant' => $tenant->id,
                'error_code' => Arr::get($exception->context(), 'error.code'),
            ]);

            return null;
        }

        return $customerId;
    }
}