<?php

namespace App\Models;

use Anik\Amqp\Exchange;
use Anik\Amqp\Facades\Amqp;
use PhpAmqpLib\Wire\AMQPTable;
use Anik\Amqp\PublishableMessage;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Auth;
use Illuminate\Validation\Validator;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Validation\ValidationException;
use Symfony\Component\HttpFoundation\Response;
use Illuminate\Database\Eloquent\Model as EloquentModel;


class Model extends EloquentModel
{

    /**
     * Introducing model relationships
     *
     * @var array
     */
    protected $fillable_relations = [];

    /**
     * Models that are ready to change.
     *
     * @var array
     */
    protected $filled_relations = [];

    /**
     * Models that are ready to change.
     *
     * @var array
     */
    protected $reportable = [];

    protected $dirties = [];

    protected $action = null;

    public const CREATED = 10;

    public const UPDATED = 20;

    public const DELETED = 30;

    public const RESTORED = 40;

    protected static function booted()
    {
        static::created(function ($model) {
            $model->action = static::CREATED;
        });

        static::updated(function ($model) {
            $model->action = static::UPDATED;
        });

        static::deleted(function ($model) {
            $model->action = static::DELETED;
        });
    }

    /**
     * @return void
     * @throw \Exception
     */
    public function rules()
    {
        return [];
    }

    /**
     *
     *
     * @param  array  $attributes
     * @return void
     */
    public function validate(array $attributes = null)
    {
        $attributes = $attributes ?? $this->getAttributes();

        /** @var Validator $validator */
        $validator = app('validator')->make($attributes, $this->rules());

        if ($validator->fails()) {
            throw new ValidationException(
                $validator,
                new JsonResponse($validator->errors()->getMessages(), Response::HTTP_UNPROCESSABLE_ENTITY)
            );
        }
    }

    /**
     * @return void
     */
    public function updateRelations()
    {
    }

    /**
     * @param  string|null  $key
     * @return void
     */
    public function getValueOf(?string $key)
    {
        $values = [];

        if ($key && isset($values, $key)) {
            return $values[$key];
        }

        return $values;
    }

    protected function makeChanges()
    {
        if (empty($this->reportable)) {
            return;
        }

        $changes = new Collection($this->getDirty());

        // fillable * or field
        $changes = $changes->filter(function ($value, $key) {
            foreach ($this->reportable as $i => $name) {
                if ($key === $name) {
                    return true;
                }
            }
            return false;
        });

        if (($changes->isEmpty() && $this->action == static::UPDATED)) {
            return;
        }

        return [
            'original' => $this->getOriginal() + $this->getAttributes(),
            'diff' => $changes->toArray(),
        ];

//        return [
//            'auth' => Auth::id(),
//            'timestamp' => $this->freshTimestamp(),
//            'business' => $this->getValueOf('business_id'),
//            'info' => \request('_business_info')['info'] ?? null,
//            'project' => $this->getValueOf('project_id'),
//            'data' => [
//                'sprint_id' => $this->getValueOf('sprint_id'),
//                'system_id' => $this->getValueOf('system_id'),
//                'workflow_id' => $this->getValueOf('workflow_id'),
//                'status_id' => $this->getValueOf('status_id'),
//                'user_id' => $this->getValueOf('user_id'),
//                'table_name' => $this->getTable(),
//                'crud_id' => $this->action,
//                'original' => $this->getOriginal() + $this->getAttributes(),
//                'diff' => $changes->toArray(),
//            ],
//            'from' => env('CONTAINER_NAME'),
//        ];
    }

    protected function report($changes): void
    {
        if ($this->action == null){
            return;
        }
        $payload = [
            'auth' => Auth::id(),
            'timestamp' => $this->freshTimestamp(),
            'business' => $this->getValueOf('business_id'),
            'info' => \request('_business_info') ?? null,
            'project' => $this->getValueOf('project_id'),
            'data' => [
                'sprint_id' => $this->getValueOf('sprint_id'),
                'system_id' => $this->getValueOf('system_id'),
                'workflow_id' => $this->getValueOf('workflow_id'),
                'status_id' => $this->getValueOf('status_id'),
                'task_id' => $this->getValueOf('task_id'),
                'subject_id' => $this->getValueOf('subject_id'),
                'user_id' => $this->getValueOf('user_id'),
                'table_name' => $this->getTable(),
                'crud_id' => $this->action,
                'original' => $changes['original'] + $this->getOriginal(),
                'diff' => $changes['diff'],
            ],
            'from' => env('CONTAINER_NAME'),
        ];

        $message = new PublishableMessage(json_encode($payload));

        $routers = [
            "activity_exchange" => ["name" => "activity",],
            "notif_exchange" => ["name" => "notif",],
            "socket_exchange" => ["name" => "socket",],
        ];

        foreach ($routers as $exchange => $properties) {
            $message->setProperties(["application_headers" => new AMQPTable($properties)]);

            $message->setExchange(new Exchange($exchange));

            Amqp::publish($message, "");
        }
    }

    /**
     * @param  array  $options
     * @return void
     */
    public function save(array $options = [])
    {
        // The validation function is called first
        $this->validate();

        // Then, because the relationships are set as attributes in this model
        // we pre-enter their names in filled_relation attribute and store
        // them in a temporary variable with a loop.
        foreach ($this->fillable_relations as $relation) {
            $this->filled_relations[$relation] = $this[$relation];
            unset($this[$relation]);
        }

        // all of its action inside one transaction
        // so if any of them failed the whole
        // process rollbacked
        DB::transaction(function () use ($options) {
            // report to the activity aggregator
            $changes = $this->makeChanges();

            // save the model with it's attributes
            parent::save($options);

            // save the model with it's relationships
            $this->updateRelations();

            is_array($changes) ? $this->report($changes) : true;
        }, 3);
    }

    public function delete()
    {
        $changes = $this->makeChanges();
        parent::delete();
        is_array($changes) ? $this->report($changes) : true;
    }
}