package mail

import (
	"runtime"
	"strings"

	"apigo.cc/gojs"
	"apigo.cc/gojs/goja"
	"github.com/ssgo/config"
	"github.com/ssgo/log"
	"github.com/ssgo/u"
)

const pluginName = "mail"

type Config struct {
	Mailbox          map[string]*MailboxConfig
	ClientName       string
	ClientVersion    string
	ClientOS         string
	ClientVendor     string
	ClientSupportURL string
}

type MailboxConfig struct {
	SmtpHost   string
	SmtpPort   int
	ImapHost   string
	ImapPort   int
	Username   string
	Password   string
	SenderName string
	SenderMail string
}

var conf = &Config{
	Mailbox:          make(map[string]*MailboxConfig),
	ClientName:       "Apigo Mail Client",
	ClientVersion:    "1.0.0",
	ClientOS:         runtime.GOOS,
	ClientVendor:     "apigo.cc",
	ClientSupportURL: "https://apigo.cc/gojs/mail",
}

var defaultObject = &DefaultObject{}
var confAes *u.Aes = u.NewAes([]byte("?GQ$0K0GgLdO=f+~L68PLm$uhKr4'=tV"), []byte("VFs7@sK61cj^f?HZ"))
var objects = make(map[string]*Mailbox)

func init() {
	tsCode := gojs.MakeTSCode(defaultObject)
	gojs.Register("apigo.cc/gojs/"+pluginName, gojs.Module{
		ObjectMaker: func(vm *goja.Runtime) gojs.Map {
			config.LoadConfig(pluginName, conf)
			for name, object := range conf.Mailbox {
				objects[name] = defaultObject.New(object)
			}
			if defaultMailbox, err := defaultObject.Get("default"); err == nil {
				defaultObject.Mailbox = defaultMailbox
			} else if len(objects) == 0 {
				log.DefaultLogger.Warning("no mailbox configured", "example for env.yml", "mail:\n  mailbox:\n    default:\n      username: ****@***.***")
			}
			return gojs.ToMap(defaultObject)
		},
		TsCode: tsCode,
		Desc:   "mail api",
		SetSSKey: func(key, iv []byte) {
			confAes = u.NewAes(key, iv)
		},
	})
}

type DefaultObject struct {
	*Mailbox
}

func (obj *DefaultObject) Get(name string) (*Mailbox, error) {
	if o, ok := objects[name]; ok {
		return o, nil
	} else {
		return nil, gojs.Err("mailbox [" + name + "] not configured")
	}
}

func (obj *DefaultObject) New(conf *MailboxConfig) *Mailbox {
	a := strings.SplitN(conf.Username, "@", 2)
	if len(a) == 2 {
		if conf.SmtpHost == "" {
			conf.SmtpHost = "smtp." + a[1]
		}
		if conf.SmtpPort == 0 {
			conf.SmtpPort = 465
		}
		if conf.ImapHost == "" {
			conf.ImapHost = "imap." + a[1]
		}
		if conf.ImapPort == 0 {
			conf.ImapPort = 993
		}
	}
	if conf.SenderMail == "" {
		conf.SenderMail = conf.Username
	}

	return &Mailbox{
		smtpHost:   conf.SmtpHost,
		smtpPort:   conf.SmtpPort,
		imapHost:   conf.ImapHost,
		imapPort:   conf.ImapPort,
		username:   conf.Username,
		password:   confAes.DecryptUrlBase64ToString(conf.Password),
		senderName: conf.SenderName,
		senderMail: conf.SenderMail,
	}
}