package util

import (
	"encoding/json"
)

type PayloadAction uint8

const (
	PayloadActionYesNo = iota
	PayloadActionVote
	PayloadActionChooseKeyboard
)

type QuestionType uint8

const (
	QuestionTypeRedmine = iota
	QuestionTypeRedmineHours
	QuestionTypeRedmineSendResult
)

type Payload struct {
	User   int64           `json:"u,omitempty"`
	Chat   int64           `json:"c,omitempty"`
	Action PayloadAction   `json:"a"`
	Data   json.RawMessage `json:"d,omitempty"`
}

func (p Payload) String() string {
	data, _ := json.Marshal(&p)
	return string(data)
}

func (p Payload) Vote() (val Vote) {
	if p.Action != PayloadActionVote {
		return
	}
	_ = json.Unmarshal(p.Data, &val)
	return
}

func (p Payload) KeyboardChoice() (val KBChooserData) {
	if p.Action != PayloadActionVote {
		return
	}
	_ = json.Unmarshal(p.Data, &val)
	return
}

func (p Payload) YesNoAnswer() (val Answer) {
	if p.Action != PayloadActionYesNo {
		return
	}
	_ = json.Unmarshal(p.Data, &val)
	return
}

type Member struct {
	ID   int64
	Name string
}

type KBChooserData struct {
	Type uint8 `json:"k"`
}

type Vote struct {
	Vote float32 `json:"v"`
}

type Answer struct {
	Type   QuestionType `json:"t"`
	Result bool         `json:"r"`
}

func NewKeyboardChooserPayload(userID, chatID int64, kbType uint8) *Payload {
	return &Payload{
		Action: PayloadActionChooseKeyboard,
		User:   userID,
		Chat:   chatID,
		Data: marshal(KBChooserData{
			Type: kbType,
		}),
	}
}

func NewVotePayload(chatID int64, vote float32) *Payload {
	return &Payload{
		Action: PayloadActionVote,
		Chat:   chatID,
		Data:   marshal(Vote{Vote: vote}),
	}
}

func NewRedmineQuestionPayload(userID int64, chatID int64, isYes bool) *Payload {
	return &Payload{
		Action: PayloadActionYesNo,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Answer{Type: QuestionTypeRedmine, Result: isYes}),
	}
}

func NewRedmineHoursQuestionPayload(userID int64, chatID int64, isYes bool) *Payload {
	return &Payload{
		Action: PayloadActionYesNo,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Answer{Type: QuestionTypeRedmineHours, Result: isYes}),
	}
}

func NewRedmineSendResultQuestionPayload(userID int64, chatID int64, isYes bool) *Payload {
	return &Payload{
		Action: PayloadActionYesNo,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Answer{Type: QuestionTypeRedmineSendResult, Result: isYes}),
	}
}

func marshal(val interface{}) json.RawMessage {
	data, _ := json.Marshal(val)
	return data
}