package mailx_test

import (
	"context"
	"errors"
	"fmt"

	mailx "code.yun.ink/pkg/mailx"
)

func ExampleNewMessage() {
	msg := mailx.NewMessage().
		From("noreply@example.com").
		To("user@example.com").
		Cc("cc@example.com").
		Subject("Hello").
		HTML("<h1>Hello</h1>").
		ReplyTo("support@example.com").
		AttachBytes("report.txt", []byte("data")).
		Build()

	fmt.Println(msg.From, msg.To[0], msg.Subject, len(msg.Attachments))
	// Output: noreply@example.com user@example.com Hello 1
}

func ExampleManager_Send() {
	mgr := mailx.NewManager()
	_ = mgr.Register(newMockSender("mock"))

	err := mgr.Send(context.Background(), mailx.NewMessage().
		To("user@example.com").
		Subject("Hello").
		Build())
	fmt.Println("send err:", err)
	// Output: send err: <nil>
}

func ExampleManager_SendWith() {
	mgr := mailx.NewManager()
	_ = mgr.Register(newMockSender("smtp"))
	_ = mgr.Register(newMockSender("aliyun"))
	_ = mgr.SetDefault("smtp")

	ctx := context.Background()
	msg := mailx.NewMessage().To("user@example.com").Subject("Hi").Build()

	_ = mgr.Send(ctx, msg) // 默认通道 smtp
	err := mgr.SendWith(ctx, "aliyun", msg)
	fmt.Println("send with aliyun err:", err)
	// Output: send with aliyun err: <nil>
}

func ExampleManager_SendBy() {
	mgr := mailx.NewManager()

	// 无需注册，发送时临时指定通道
	err := mgr.SendBy(context.Background(), newMockSender("temp"), mailx.NewMessage().
		To("user@example.com").
		Subject("Hi").
		Build())
	fmt.Println("send by err:", err)
	// Output: send by err: <nil>
}

func ExampleMessage_Validate() {
	msg := mailx.NewMessage().Subject("no recipients").Build()
	err := msg.Validate()
	fmt.Println(errors.Is(err, mailx.ErrInvalidMessage))
	fmt.Println(err)
	// Output:
	// true
	// mailx: invalid message: requires at least one recipient
}