// 使用示例：展示 mailx 的三种典型用法
package main

import (
	"context"
	"errors"
	"fmt"
	"log"

	"code.yun.ink/pkg/mailx"
	"code.yun.ink/pkg/mailx/aliyun"
	"code.yun.ink/pkg/mailx/aws"
	"code.yun.ink/pkg/mailx/mailgun"
	"code.yun.ink/pkg/mailx/smtp"
)

func main() {
	ctx := context.Background()

	// ===== 方式一：单个通道直接发送 =====
	// 465 端口走 SSL，587/25 走 STARTTLS；也可显式指定 Encryption
	err := smtp.New(smtp.Config{
		Host:     "smtpdm-ap-southeast-1.aliyun.com",
		Port:     80,
		User:     "support@email.blueoceanpay.com",
		Password: "SupporT2017",
		From:     "yun@blueoceanpay.com",
	}).Send(ctx, mailx.NewMessage().
		From(`"蓝海支付" <yun@blueoceanpay.com>`). // 发件人可带显示名
		To("995116474@qq.com").
		Subject("Test Email").
		Text("纯文本正文").
		HTML(`<h1>Hello</h1><p>This is a test email.</p><img src="cid:logo1">`).
		InlineImage("logo1", "assets/logo.png"). // 内嵌图片
		Build())
	fmt.Println("smtp send:", err)

	// ===== 方式二：多通道管理器，发送时切换通道 =====
	mgr := mailx.NewManager()
	_ = mgr.Register(smtp.New(smtp.Config{
		Host: "smtp.qq.com", Port: 587, User: "from@qq.com", Password: "auth-code",
	}))
	_ = mgr.Register(aliyun.New(aliyun.Config{
		AccessKeyID: "your-access-key-id", AccessKeySecret: "your-access-key-secret",
		AccountName: "noreply@example.com",
	}))
	_ = mgr.Register(aws.New(aws.Config{
		AccessKeyID: "your-ak", AccessKeySecret: "your-sk", Region: "ap-northeast-1",
		Sender: "noreply@example.com",
	}))
	_ = mgr.Register(mailgun.New(mailgun.Config{
		APIKey: "your-api-key", Domain: "mg.example.com", Sender: "noreply@example.com",
	}))

	// 同一通道类型（smtp）注册多份不同配置，用实例名区分
	_ = mgr.RegisterNamed("smtp-main", smtp.New(smtp.Config{
		Host: "smtp.qq.com", Port: 465, User: "a@qq.com", Password: "code-main",
	}))
	_ = mgr.RegisterNamed("smtp-backup", smtp.New(smtp.Config{
		Host: "smtp.163.com", Port: 465, User: "a@163.com", Password: "code-backup",
	}))

	_ = mgr.SetDefault("aliyun")

	// 遍历当前已注册的通道实例信息（实例名 + 类型）
	for _, info := range mgr.Senders() {
		log.Printf("registered sender: instance=%s type=%s", info.Name, info.Type)
	}
	log.Println("default:", mgr.Default())

	msg := mailx.NewMessage().
		From("noreply@example.com").
		To("user@example.com").
		Subject("Hello").
		Text("hello").
		HTML("<h1>Hello</h1>").
		Build()

	if err := mgr.Send(ctx, msg); err != nil { // 默认通道
		log.Println("default send:", err)
	}
	if err := mgr.SendWith(ctx, "aws", msg); err != nil { // 按名称指定通道
		log.Println("aws send:", err)
	}

	// ===== 方式三：发送时临时指定配置（无需提前注册） =====
	if err := mgr.SendBy(ctx, mailgun.New(mailgun.Config{
		APIKey: "another-key", Domain: "mg2.example.com", Sender: "noreply@example.com",
	}), msg); err != nil {
		log.Println("mailgun send:", err)
	}

	// ===== 错误类型判断 =====
	if err := mgr.SendWith(ctx, "no-such-channel", msg); err != nil {
		if errors.Is(err, mailx.ErrSenderNotFound) {
			log.Println("channel not found, will retry with another channel")
		}
	}
}