package dto

import (
	"encoding/json"
)

type PayloadAction uint8

const (
	PayloadActionNext = iota
	PayloadActionPrevious
	PayloadActionAddMember
	PayloadActionRemoveMember
	PayloadActionYesNo
	PayloadActionVote
)

type QuestionType uint8

const (
	QuestionTypeChatMembers QuestionType = iota
	QuestionTypeRedmine
	QuestionTypeRedmineHours
)

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

type Member struct {
	ID   int64
	Name string
}

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

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

func NewNextPageMembersPayload(userID, chatID int64) *Payload {
	return &Payload{
		Action: PayloadActionNext,
		User:   userID,
		Chat:   chatID,
	}
}

func NewPrevPageMembersPayload(userID, chatID int64) *Payload {
	return &Payload{
		Action: PayloadActionPrevious,
		User:   userID,
		Chat:   chatID,
	}
}

func NewAddMemberPayload(userID, chatID, memberID int64, memberName string) *Payload {
	return &Payload{
		Action: PayloadActionAddMember,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Member{ID: memberID, Name: memberName}),
	}
}

func NewRemoveMemberPayload(userID, chatID, memberID int64, memberName string) *Payload {
	return &Payload{
		Action: PayloadActionRemoveMember,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Member{ID: memberID, Name: memberName}),
	}
}

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

func NewConfirmMembersPayload(userID int64, chatID int64) *Payload {
	return &Payload{
		Action: PayloadActionYesNo,
		User:   userID,
		Chat:   chatID,
		Data:   marshal(Answer{Type: QuestionTypeChatMembers, Result: true}),
	}
}

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