package worker

import (
	"api.qobiltu.id/assets"
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"github.com/hibiken/asynq"
	"html/template"
	"log/slog"
)

const (
	TaskSendVerifyEmailMaxRetry = 3
	TaskSendVerifyEmail         = "task:send_verify_email"
	TaskSendVerifyEmailSubject  = "Verifikasi Email"
)

type PayloadSendVerifyEmail struct {
	EmailAddress        string `json:"email_address"`
	VerificationCode    string `json:"verification_code"`
	ExpirationInMinutes int    `json:"expiration_in_minutes"`
	Subject             string `json:"subject"`
}

func (d *RedisTaskDistributor) DistributeTaskSendVerifyEmail(
	ctx context.Context,
	payload *PayloadSendVerifyEmail,
	opts ...asynq.Option,
) error {
	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("failed to marshal task payload: %w", err)
	}

	task := asynq.NewTask(TaskSendVerifyEmail, jsonPayload, opts...)

	_, err = d.client.EnqueueContext(ctx, task)
	if err != nil {
		return fmt.Errorf("failed to enqueue task: %w", err)
	}

	return nil
}

func (p *RedisTaskProcessor) ProcessTaskSendVerifyEmail(ctx context.Context, task *asynq.Task) error {
	var payload PayloadSendVerifyEmail
	if err := json.Unmarshal(task.Payload(), &payload); err != nil {
		return fmt.Errorf("failed to unmarshal payload: %w", asynq.SkipRetry)
	}

	var tmpl *template.Template
	tmpl, err := template.ParseFS(assets.EmbeddedFiles, assets.EmailConfirmationTemplatePath)
	if err != nil {
		return fmt.Errorf("failed to parse email template: %w", err)
	}

	var body bytes.Buffer
	if err := tmpl.ExecuteTemplate(&body, "htmlBody", payload); err != nil {
		return fmt.Errorf("failed to execute email template: %w", err)
	}
	htmlContent := body.String()

	slog.Info("Sending verification email", slog.String("email", payload.EmailAddress))

	err = p.emailSender.Send(payload.EmailAddress, payload.Subject, htmlContent, payload)
	if err != nil {
		return fmt.Errorf("failed to send verify email: %w", err)
	}

	slog.Info("Verification email sent successfully", slog.String("email", payload.EmailAddress))

	return nil
}