package tg

import (
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
	//"strings"
	re "regexp"
	"fmt"
)
type Message = tgbotapi.Message

// Simple text message component type.
type MessageCompo struct {
	Message Message
	ParseMode string
	Text string
}

var (
	escapeRe = re.MustCompile(`([_*\[\]()~`+"`"+`>#+-=|{}.!])`)
	NewRawMessage = tgbotapi.NewMessage
)

// Escape special characters in Markdown 2 and return the
// resulting string.
func Escape2(str string) string {
	return string(escapeRe.ReplaceAll([]byte(str), []byte("\\$1")))
}

// Call the function after the message was sent.
func (compo *MessageCompo) Update(c Context) error {
	edit := tgbotapi.NewEditMessageText(
		c.Session.Id.ToApi(),
		compo.Message.MessageID,
		compo.Text,
	)
	msg, err := c.bot.api.Send(edit)
	if err != nil {
		return err
	}
	compo.Message = msg
	return nil
}

func (compo *MessageCompo) Delete(c *Context) {
	cfg := tgbotapi.NewDeleteMessage(c.Session.Id.ToApi(), compo.Message.MessageID)
	c.Bot.Api.Send(cfg)
	//c.Sendf("%q", err)
}

// Is only implemented to make it sendable and so we can put it
// return of rendering functions.
func (compo *MessageCompo) SetMessage(msg Message) {
	compo.Message = msg
}

// Return new message with the specified text.
func Messagef(format string, v ...any) MessageCompo {
	ret := MessageCompo{}
	ret.Text = fmt.Sprintf(format, v...)
	ret.ParseMode = tgbotapi.ModeMarkdown
	return ret
}

// Return message with the specified parse mode.
func (msg MessageCompo) withParseMode(mode string) MessageCompo {
	msg.ParseMode = mode
	return msg
}

// Set the default Markdown parsing mode.
func (msg MessageCompo) MD() MessageCompo {
	return msg.withParseMode(tgbotapi.ModeMarkdown)
}

// Set the Markdown 2 parsing mode.
func (msg MessageCompo) MD2() MessageCompo {
	return msg.withParseMode(tgbotapi.ModeMarkdownV2)
}

// Set the HTML parsing mode.
func (msg MessageCompo) HTML() MessageCompo {
	return msg.withParseMode(tgbotapi.ModeHTML)
}

// Transform the message component into one with reply keyboard.
func (msg MessageCompo) Inline(inline Inline) InlineCompo {
	return InlineCompo{
		Inline: inline,
		MessageCompo: msg,
	}
}

// Transform the message component into one with reply keyboard.
func (msg MessageCompo) Reply(reply Reply) ReplyCompo {
	return ReplyCompo{
		Reply: reply,
		MessageCompo: msg,
	}
}

// Transform the message component into the location one.
func (msg MessageCompo) Location(
	lat, long float64,
) LocationCompo {
	ret := &LocationCompo{
		MessageCompo: msg,
		Location: Location{
			Latitude: lat,
			Longitude: long,
		},
	}
	return ret
}

// Implementing the Sendable interface.
func (config MessageCompo) SendConfig(
	sid SessionId, bot *Bot,
) (SendConfig) {
	var (
		ret SendConfig
		text string
	)

	if config.Text == "" {
		text = ">"
	} else {
		text = config.Text
	}

	msg := tgbotapi.NewMessage(sid.ToApi(), text)
	msg.ParseMode = config.ParseMode
	ret.Chattable = msg

	return ret
}

// Empty serving to use messages in rendering.
func (compo *MessageCompo) Serve(c Context) {}

// Filter that skips everything. Messages cannot do anything with updates.
func (compo *MessageCompo) Filter(_ Update) bool {
	// Skip everything
	return true
}