<?php

namespace App\Logic;

use App\Events\Email\ConfirmEvent;
use App\Exceptions\AppCommonException;
use App\Email\BaseEmailer;
use App\Models\Email;
use App\Models\EmailAttachment;
use Exception;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Carbon;
use Validator;

class EmailManager
{

    private Email $model;

    private bool $canSend = false;

    /**
     * @var Collection<int, EmailAttachment>|null
     */
    private ?Collection $attachments = null;

    public function __construct(int|BaseEmailer $param)
    {
        if (is_numeric($param)) {
            $this->model = Email::lockForUpdate()->findOrfail($param);
            $this->canSend = $this->model->send_datetime === null;
            if (!$this->checkAuth()) throw new AppCommonException("メール権限エラー");
        } else if ($param instanceof BaseEmailer) {
            $this->model = $param->makeModel();
        }
    }

    public function checkAuth()
    {
        return true;
    }

    public function getEmailId()
    {
        $this->model->setId();
        return $this->model->id;
    }

    public function getTimestamp(): Carbon|null
    {
        return $this->model->updated_at;
    }

    public function create()
    {
        $this->model->save();
        return [];
    }

    public function setSubject(string $subject)
    {
        if ($this->canSend()) {
            $this->model->subject = $subject;
        } else {
            throw new AppCommonException("送信済みメール編集エラー");
        }
        return $this;
    }

    public function setContent(string $content)
    {

        if ($this->canSend()) {
            $this->model->content = $content;
        } else {
            throw new AppCommonException("送信済みメール編集エラー");
        }
        return $this;
    }

    public function attach(string $filepath, string $filename, string $mimeType)
    {

        if ($this->attachments === null) {
            $this->attachments = new Collection();
        }
        $attachment = new EmailAttachment();
        $attachment->filepath = $filepath;
        $attachment->send_filename = $filename;
        $attachment->mime = $mimeType;

        $this->attachments->push($attachment);

        return $this;
    }

    public function update()
    {
        $this->model->save();
        return [];
    }

    public function confirm()
    {

        $validator  = Validator::make(['email' => $this->model->email], [
            'email' => ['required', 'email:strict,dns']
        ]);

        if ($validator->fails()) {
            throw new Exception(sprintf("%s [%s]", $validator->errors()->first(), $this->model->email));
        }

        if ($this->canSend() !== null) {
            $this->model->setId();
            ConfirmEvent::dispatch($this->model, $this->attachments);
        } else {
            throw new AppCommonException("送信済みエラー");
        }
    }

    public function canSend()
    {
        return $this->canSend;
    }
}