<?php

namespace App\Http\Controllers\Api\V2;

use App\Enums\ApiError;
use App\Exceptions\Api\V2\ApiErrorException;
use App\Exceptions\Api\V2\CrmException;
use App\Http\Controllers\Controller;
use App\Http\Requests\Api\V2\AuthenticateRequest;
use App\Http\Requests\Api\V2\StoreCustomerRequest;
use App\Http\Requests\Api\V2\UpdateCustomerRequest;
use App\Http\Resources\Api\V2\CustomerResource;
use App\Jobs\UpdateCustomerLastConnection;
use App\Models\Customer;
use App\Models\Service;
use App\Models\SingleOptin;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Facades\DB;

class CustomerController extends Controller
{
    /**
     * Creates a new customer for the specified service.
     *
     * @param \App\Http\Requests\Api\V2\StoreCustomerRequest $request
     * @param \App\Models\Service                            $service
     * @return \Illuminate\Http\Resources\Json\JsonResource
     * @throws \App\Exceptions\Api\V2\ApiErrorException With ApiError::customerExists if
     *                                                  the customer with this email already exists.
     * @throws \App\Exceptions\Api\V2\CrmException If saving the customer to DB failed.
     */
    public function store(StoreCustomerRequest $request, Service $service): JsonResource
    {
        $data = (object)$request->validated();

        /** @var \App\Models\Customer */
        $customer = Customer::where('email', $data->email)->firstOrCreate([
            'email' => $data->email
        ]);

        DB::transaction(function () use (&$customer, $data, $request, $service) {

            $saved = $customer->save();
            $customer->setOptIn($service->brand, $data->opt_in);

            // * Delete Single optin if exists.
            /** @var \App\Models\SingleOptin|null $singleOptin */
            $singleOptin = SingleOptin::where('email', $data->email)
                ->where('brand_id', $service->brand->id)->first();
            if ($singleOptin) {
                $saved = $singleOptin->delete() && $saved;
            }

            /** @var \App\Models\CustomerInfo */
            $customerInfo = $customer->info($service->brand, Customer::FIRST_OR_NEW);
            if ($customerInfo->exists) {
                throw new ApiErrorException(ApiError::customerExists());
            }
            $customerInfo->fill($request->validated());
            $customerInfo->brand()->associate($service->brand);
            $customerInfo->customer()->associate($customer);
            $saved = $customerInfo->save() && $saved;

            /** @var \App\Models\CustomerLogin */
            $customerLogin = $customer->login($service->brand, Customer::FIRST_OR_NEW);
            $customerLogin->fill($request->validated());
            $customerLogin->brand()->associate($service->brand);
            $customerLogin->customer()->associate($customer);
            $saved = $customerLogin->save() && $saved;

            if (!$saved) {
                // @codeCoverageIgnoreStart
                throw new CrmException('Api failed to store customer.');
                // @codeCoverageIgnoreEnd
            }
        });

        return new CustomerResource($service->brand, $customer);
    }

    /**
     * Renders the specific customer infos
     *
     * @param  \App\Models\Service  $service
     * @param  \App\Models\Customer $customer
     * @return \Illuminate\Http\Resources\Json\JsonResource
     */
    public function show(Service $service, Customer $customer): JsonResource
    {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        return new CustomerResource($service->brand, $customer);
    }

    /**
     * Updates information for a specific customer
     *
     * @param \App\Http\Requests\Api\V2\UpdateCustomerRequest $request
     * @param \App\Models\Service                             $service
     * @param \App\Models\Customer                            $customer
     * @return \Illuminate\Http\Resources\Json\JsonResource
     * @throws \App\Exceptions\Api\V2\CrmException If saving the customer to DB failed.
     */
    public function update(UpdateCustomerRequest $request, Service $service, Customer $customer): JsonResource
    {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        DB::transaction(function () use ($request, $customer, $service) {
            // To correct with create.
            $customer->fill($request->validated());
            $saved = $customer->save();
            if ($request->has('opt_in')) {
                $customer->setOptIn($service->brand, $request->opt_in);
            }

            /** @var \App\Models\CustomerInfo */
            $customerInfo = $customer->info($service->brand, Customer::FIRST_OR_FAIL);
            $customerInfo->fill($request->validated());
            $saved = $customerInfo->save() && $saved;

            /** @var \App\Models\CustomerLogin */
            $customerLogin = $customer->login($service->brand, Customer::FIRST_OR_FAIL);
            $customerLogin->fill($request->validated());
            $saved = $customerLogin->save() && $saved;

            if (!$saved) {
                // @codeCoverageIgnoreStart
                throw new CrmException('Api failed to update customer.');
                // @codeCoverageIgnoreEnd
            }
        });

        return new CustomerResource($service->brand, $customer);
    }

    /**
     * Deletes customer information for a specific service
     *
     * @param \App\Models\Service  $service
     * @param \App\Models\Customer $customer
     * @return \Illuminate\Http\JsonResponse
     * @throws \App\Exceptions\Api\V2\CrmException If removing the customer off the DB failed.
     */
    public function destroy(Service $service, Customer $customer): JsonResponse
    {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        // TODO: Gestion avec mesBR.
        /** @var \App\Models\CustomerInfo */
        $customerInfo = $customer->info($service->brand, Customer::FIRST_OR_FAIL);
        /** @var \App\Models\CustomerLogin */
        $customerLogin = $customer->login($service->brand, Customer::FIRST_OR_FAIL);

        DB::transaction(function () use ($service, $customer, $customerLogin, $customerInfo) {
            if (
                $customerInfo->delete() === false ||
                $customerLogin->delete() === false
            ) {
                // @codeCoverageIgnoreStart
                throw new CrmException('Api failed to delete customer.');
                // @codeCoverageIgnoreEnd
            };

            $customer->optInHistory()->whereHas('brand', function ($q) use ($service) {
                $q->where('id', $service->brand_id);
            })->delete();

            // * Force loading real relation counts.
            $customer->unsetRelation('logins');
            $customer->unsetRelation('infos');
            $logins = $customer->logins()->count();
            $infos  = $customer->infos()->count();

            // If customer is not associated with any brand then delete.
            if (!$logins and !$infos) {
                if ($customer->delete() === false) {
                    // @codeCoverageIgnoreStart
                    throw new CrmException('Api failed to update customer.');
                    // @codeCoverageIgnoreEnd
                }
            }
        });

        return response()->json();
    }

    /**
     * Authenticate the user
     *
     * @param \App\Http\Requests\Api\V2\AuthenticateRequest $request
     * @param \App\Models\Service                           $service
     * @return \Illuminate\Http\Resources\Json\JsonResource
     * @throws \App\Exceptions\Api\V2\ApiErrorException With ApiError::authFailed() in case
     *                                                  of wrong credentials.
     * @throws \App\Exceptions\Api\V2\ApiErrorException With ApiError::customerNotActivated() if
     *                                                  customer account is not activated.
     */
    public function authenticate(AuthenticateRequest $request, Service $service): JsonResource
    {
        try {
            /** @var \App\Models\Customer */
            $customer = Customer::where('email', $request->email)->firstOrFail();

            /** @var \App\Models\CustomerLogin $customerLogin */
            $customerLogin = $customer->login($service->brand, Customer::FIRST_OR_FAIL);
            if (!$customerLogin->passwordMatch($request->password)) {
                throw new ApiErrorException(ApiError::authFailed());
            }

            if (!$customerLogin->status) {
                throw new ApiErrorException(ApiError::customerNotActivated());
            }

            UpdateCustomerLastConnection::dispatch($customer, $customerLogin, now())
                ->onConnection('database')->afterResponse();

            return new CustomerResource($service->brand, $customer);
        } catch (ModelNotFoundException $e) {
            throw new ApiErrorException(ApiError::authFailed());
        } //end try
    }

    /**
     * Activate the account of the user
     *
     * @param \App\Models\Customer $customer
     * @param \App\Models\Service  $service
     * @return \Illuminate\Http\JsonResponse
     * @throws \App\Exceptions\Api\V2\ApiErrorException With ApiError::customerAlreadyActive
     *                                                  if customer account is already active.
     * @throws \App\Exceptions\Api\V2\CrmException If saving the customer to DB failed.
     */
    public function activateAccount(Customer $customer, Service $service)
    {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        /** @var \App\Models\CustomerLogin $login */
        $login = $customer->login($service->brand, Customer::FIRST_OR_FAIL);

        if ($login->status) {
            throw new ApiErrorException(ApiError::customerAlreadyActive());
        }

        $login->status = true;
        if (!$login->save()) {
            // @codeCoverageIgnoreStart
            throw new CrmException('Failed to save login');
            // @codeCoverageIgnoreEnd
        }
        return response()->json();
    }
}