package main

import (
	"vultras.su/core/tg"
	"strings"
)

// The component to get incoming messages and
// send back mutated version.
type MutateMessageCompo struct {
	Mutate func(string) string
}

func NewMutateMessageCompo(fn func(string) string) *MutateMessageCompo {
	ret := &MutateMessageCompo{}
	ret.Mutate = fn
	return ret
}

func (w *MutateMessageCompo) Serve(c tg.Context) {
	args, ok := c.Arg().([]any)
	if ok {
		for _, arg := range args {
			c.Sendf("%v", arg)
		}
	}
	for u := range c.Input() {
		text := u.Message.Text
		_, err := c.Sendf2("%s", w.Mutate(text))
		if err != nil {
			c.Sendf("debug: %q", err)
		}
	}
}

// Implementing the Filter interface making
// possible to give the updates away for
// the underlying components.
func (w *MutateMessageCompo) Filter(u tg.Update) bool {
	if u.Message == nil {
		return true
	}
	return false
}

const (
	UpperCasePath tg.Path = "upper-case"
	LowerCasePath = "lower-case"
	EscapePath = "escape"
	MutateMessagesPath = "mutate-messages"
)

var MutateMessagesWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
	return tg.UI{
		tg.Messagef(
			"Choose widget to mutate strings",
		).Reply(
			tg.NewKeyboard().Row(
				tg.Buttonf("Upper case").Go(UpperCasePath),
				tg.Buttonf("Lower case").Go(LowerCasePath),
				tg.Buttonf("Escape chars").Go(EscapePath),
			).Row(
				BackButton,
			).Reply(),
		),
	}
})

var MutateMessagesToLowerCaseWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
	return tg.UI{
		tg.Messagef(
			"Type a string and the bot will convert it to lower case",
		).Reply(
			BackKeyboard.Reply(),
		),
		NewMutateMessageCompo(strings.ToLower),
	}
})

var MutateMessagesToUpperCaseWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
	return tg.UI{
		tg.Messagef(
			"Type a string and the bot will convert it to upper case",
		).Reply(
			BackKeyboard.Reply(),
		),
		NewMutateMessageCompo(strings.ToUpper),
	}
})
var MutateMessagesEscapeWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
	return tg.UI{
		tg.Messagef(
			"Type a string and the bot will escape characters in it",
		).Reply(
			BackKeyboard.Reply(),
		),
		NewMutateMessageCompo(tg.Escape2),
	}
})