<?php

namespace App\Mail;

use App\Mail\Concerns\BuildsTemplateEnvelope;
use App\Models\Template;
use App\Services\Email\EmailTemplateRenderer;
use App\Services\Email\EmailTemplateService;
use App\Support\AutoEmailGate;
use App\Support\MailGlobals;
use Illuminate\Mail\Mailable;
use Illuminate\Mail\Mailables\Content;
use Illuminate\Mail\Mailables\Envelope;

abstract class TemplateMailable extends Mailable
{
    use BuildsTemplateEnvelope;

    private ?array $rendered = null;

    abstract protected function scenario(): string;

    /**
     * @return array<string, mixed>
     */
    abstract protected function variables(): array;

    public function envelope(): Envelope
    {
        return $this->templateEnvelope($this->rendered()['subject'], $this->template()->mailConfig());
    }

    public function content(): Content
    {
        return new Content(htmlString: $this->rendered()['html']);
    }

    public function buildViewData()
    {
        return [...parent::buildViewData(), AutoEmailGate::SCENARIO_DATA_KEY => $this->scenario()];
    }

    /**
     * @return array{subject: string, html: string}
     */
    private function rendered(): array
    {
        return $this->rendered ??= app(EmailTemplateRenderer::class)->render(
            $this->template(),
            [...MailGlobals::values(), ...$this->variables()],
        );
    }

    private function template(): Template
    {
        return app(EmailTemplateService::class)->loadTemplate($this->scenario());
    }
}