package handler

import (
	"encoding/json"
	"fmt"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db/model"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/iface"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/store"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/util"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/integration"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/locale"
	"github.com/mymmrac/telego"
	tu "github.com/mymmrac/telego/telegoutil"
	"strings"
)

type CallbackQueryHandler struct {
	iface.Base
}

func NewCallbackQueryHandler(app iface.App) Handler {
	return &CallbackQueryHandler{iface.NewBase(app, 0, 0)}
}

func (h *CallbackQueryHandler) Handle(wh telego.Update) error {
	cq := wh.CallbackQuery
	if cq.Message.GetChat().Type == telego.ChatTypePrivate {
		user, err := h.App.DB().ForUser().ByTelegramID(cq.From.ID)
		if err != nil {
			return err
		}
		if user != nil && user.ID > 0 {
			return h.handleSetupKey(cq, user)
		}

		return nil
	}

	var pl util.Payload
	if err := json.Unmarshal([]byte(cq.Data), &pl); err != nil {
		return err
	}
	chat, err := h.App.DB().ForChat().ByTelegramID(pl.Chat)
	if err != nil {
		return err
	}
	user, err := h.App.DB().ForUser().ByID(chat.UserID)
	if err != nil {
		return err
	}
	loc := h.Localizer(user.Language)
	switch pl.Action {
	case util.PayloadActionVote:
		poll, found, err := h.findPollByMessage(cq.Message, loc)
		if err != nil {
			return err
		}
		if !found {
			return nil
		}
		return h.handleVote(cq.From, chat, cq.Message, poll, pl, loc)
	case util.PayloadActionVoteFinish:
		poll, found, err := h.findPollByMessage(cq.Message, loc)
		if err != nil {
			return err
		}
		if !found {
			return nil
		}
		return h.handleVoteFinish(cq.From, chat, cq.Message, poll, pl, loc)
	case util.PayloadActionVoteSendRedmine:
		poll, found, err := h.findPollByMessage(cq.Message, loc)
		if err != nil {
			return err
		}
		if !found {
			return nil
		}
		return h.handleVoteSendRedmine(cq.From, chat, cq.Message, poll, pl, loc)
	default:
	}

	return nil
}

func (h *CallbackQueryHandler) handleVoteFinish(from telego.User, chat *model.Chat,
	msg telego.MaybeInaccessibleMessage, poll store.PollState, pl util.Payload, loc locale.Localizer) error {
	dotOrColon := "."
	if poll.Subject != "" {
		dotOrColon = ": "
	}
	if len(poll.Votes) == 0 {
		store.Polls.Delete(msg.GetMessageID())
		_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
			ChatID:    tu.ID(pl.Chat),
			MessageID: msg.GetMessageID(),
			Text: fmt.Sprintf("%s\n%s\n%s",
				loc.Template("poker_start", map[string]interface{}{
					"Name":       poll.Initiator,
					"DotOrColon": dotOrColon,
					"Subject":    poll.Subject,
				}),
				loc.Template("poker_ended", map[string]interface{}{"Name": from.Username}),
				loc.Message("poker_ended_no_results"),
			),
			ParseMode: telego.ModeMarkdown,
		})
		h.App.Log().Debugf("finished poll: %#v", poll)
		return err
	}

	poll.Calculate()
	store.Polls.Set(msg.GetMessageID(), poll)
	_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(pl.Chat),
		MessageID: msg.GetMessageID(),
		Text: fmt.Sprintf("%s\n%s\n\n%s\n%s\n\n%s",
			loc.Template("poker_start", map[string]interface{}{
				"Name":       poll.Initiator,
				"DotOrColon": dotOrColon,
				"Subject":    poll.Subject,
			}),
			loc.Template("poker_ended", map[string]interface{}{"Name": from.Username}),
			loc.Message("voted"),
			h.voters(poll.Votes, loc),
			loc.Template("poker_results", poll.Result),
		),
		ParseMode:   telego.ModeMarkdown,
		ReplyMarkup: h.getPollAfterEndKeyboard(chat, poll, loc),
	})
	h.App.Log().Debugf("finished poll: %#v", poll)
	return err
}

func (h *CallbackQueryHandler) handleVoteSendRedmine(from telego.User, chat *model.Chat,
	msg telego.MaybeInaccessibleMessage, poll store.PollState, pl util.Payload, loc locale.Localizer) error {
	dotOrColon := "."
	if poll.Subject != "" {
		dotOrColon = ": "
	}
	updateMessage := func(tag string) error {
		_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
			ChatID:    tu.ID(pl.Chat),
			MessageID: msg.GetMessageID(),
			Text: fmt.Sprintf("%s\n%s\n\n%s\n%s\n\n%s\n\n%s",
				loc.Template("poker_start", map[string]interface{}{
					"Name":       poll.Initiator,
					"DotOrColon": dotOrColon,
					"Subject":    poll.Subject,
				}),
				loc.Template("poker_ended", map[string]interface{}{"Name": from.Username}),
				loc.Message("voted"),
				h.voters(poll.Votes, loc),
				loc.Template("poker_results", poll.Result),
				loc.Message(tag),
			),
			ParseMode: telego.ModeMarkdown,
		})
		return err
	}

	h.App.Log().Debugf("received vote send for poll: %#v", poll)
	if !poll.CanRedmine || poll.TaskID == 0 {
		store.Polls.Delete(msg.GetMessageID())
		h.App.Log().Errorf("cannot send info to Redmine for %d: CanRedmine: %t", poll.TaskID, poll.CanRedmine)
		return updateMessage("poker_redmine_cannot_send")
	}
	integrationData, err := h.App.DB().ForIntegration().LoadForChatAndType(chat.ID, model.RedmineIntegration)
	if err != nil {
		store.Polls.Delete(msg.GetMessageID())
		h.App.Log().Errorf("cannot send info to Redmine for %d: %s", poll.TaskID, err)
		return updateMessage("poker_redmine_cannot_send")
	}

	err = integration.New(*integrationData, h.App.Log()).PushVoteResult(poll.TaskID, poll.Result.RoundHalf)
	if err != nil {
		store.Polls.Delete(msg.GetMessageID())
		h.App.Log().Errorf("cannot send info to Redmine for %d: %s", poll.TaskID, err)
		return updateMessage("poker_redmine_cannot_send")
	}

	return updateMessage("poker_redmine_sent")
}

func (h *CallbackQueryHandler) handleVote(from telego.User, chat *model.Chat,
	msg telego.MaybeInaccessibleMessage, poll store.PollState, pl util.Payload, loc locale.Localizer) error {
	var found bool
	for i, storedVote := range poll.Votes {
		if storedVote.ID == from.ID {
			storedVote.Name = h.pollMemberName(&from)
			storedVote.Vote = pl.Vote().Vote
			poll.Votes[i] = storedVote
			found = true
			break
		}
	}
	if !found {
		poll.Votes = append(poll.Votes, store.MemberVote{
			Member: util.Member{
				ID:   from.ID,
				Name: h.pollMemberName(&from),
			},
			Vote: pl.Vote().Vote,
		})
	}
	store.Polls.Set(msg.GetMessageID(), poll)

	h.App.Log().Debugf("processed vote %#v for poll: %#v", pl.Vote(), poll)
	dotOrColon := "."
	if poll.Subject != "" {
		dotOrColon = ": "
	}
	_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(pl.Chat),
		MessageID: msg.GetMessageID(),
		Text: fmt.Sprintf("%s\n%s\n%s",
			loc.Template("poker_start", map[string]interface{}{
				"Name":       poll.Initiator,
				"DotOrColon": dotOrColon,
				"Subject":    poll.Subject,
			}),
			loc.Message("voted"),
			h.votersWithoutVotes(poll.Votes, loc),
		),
		ReplyMarkup: h.getPollKeyboard(chat, loc),
		ParseMode:   telego.ModeMarkdown,
	})
	return err
}

func (h *CallbackQueryHandler) pollMemberName(user *telego.User) string {
	return fmt.Sprintf("%s (@%s)", strings.TrimRight(user.FirstName+" "+user.LastName, " "), user.Username)
}

func (h *CallbackQueryHandler) voters(votes []store.MemberVote, loc locale.Localizer) string {
	var sb strings.Builder
	sb.Grow(20 * len(votes))
	for _, vote := range votes {
		sb.WriteString(loc.Template("vote_result", map[string]interface{}{
			"Name": vote.Name,
			"Vote": vote.Vote,
		}) + "\n")
	}
	return strings.TrimRight(sb.String(), "\n")
}

func (h *CallbackQueryHandler) votersWithoutVotes(votes []store.MemberVote, loc locale.Localizer) string {
	var sb strings.Builder
	sb.Grow(20 * len(votes))
	for _, vote := range votes {
		sb.WriteString(loc.Template("voter", map[string]interface{}{"Name": vote.Name}) + "\n")
	}
	return strings.TrimRight(sb.String(), "\n")
}

func (h *CallbackQueryHandler) getPollKeyboard(chat *model.Chat, loc locale.Localizer) *telego.InlineKeyboardMarkup {
	switch chat.KeyboardType {
	case model.StandardKeyboard:
		return util.StandardVoteKeyboard(chat.TelegramID, loc)
	case model.StoryPointsKeyboard:
		return util.StoryPointsVoteKeyboard(chat.TelegramID, loc)
	}
	return nil
}

func (h *CallbackQueryHandler) getPollAfterEndKeyboard(chat *model.Chat, poll store.PollState, loc locale.Localizer) *telego.InlineKeyboardMarkup {
	rm, err := h.App.DB().ForIntegration().LoadForChatAndType(chat.ID, model.RedmineIntegration)
	if err != nil {
		return nil
	}
	if rm != nil && rm.ID > 0 && poll.CanRedmine && poll.TaskID > 0 {
		return util.SendRedmineKeyboard(chat.TelegramID, poll.Result.RoundHalf, loc)
	}
	return nil
}

func (h *CallbackQueryHandler) findPollByMessage(msg telego.MaybeInaccessibleMessage, loc locale.Localizer) (store.PollState, bool, error) {
	poll, found := store.Polls.Get(msg.GetMessageID())
	if !found {
		_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
			ChatID:    tu.ID(msg.GetChat().ID),
			MessageID: msg.GetMessageID(),
			Text:      loc.Message("cannot_find_poll"),
		})
		return store.PollState{}, false, err
	}
	return poll, true, nil
}

func (h *CallbackQueryHandler) handleSetupKey(cq *telego.CallbackQuery, user *model.User) error {
	var pl util.Payload
	if err := json.Unmarshal([]byte(cq.Data), &pl); err != nil {
		return err
	}
	switch pl.Action {
	case util.PayloadActionChooseKeyboard:
		return h.handleChooseKeyboard(pl, cq.Message.GetMessageID(), user)
	case util.PayloadActionYesNo:
		answer := pl.YesNoAnswer()
		switch answer.Type {
		case util.QuestionTypeRedmine:
			return h.handleAnswerRedmine(answer, pl.Chat, cq.Message.GetMessageID(), user)
		case util.QuestionTypeRedmineHours:
			return h.handleAnswerRedmineHours(answer, pl.Chat, cq.Message.GetMessageID(), user)
		case util.QuestionTypeRedmineSendResult:
			return h.handleAnswerRedmineSendResults(answer, cq.Message.GetMessageID(), user)
		}
	default:
		return nil
	}
	return nil
}

func (h *CallbackQueryHandler) handleChooseKeyboard(pl util.Payload, msgID int, user *model.User) error {
	cr := h.App.DB().ForChat()
	result := pl.KeyboardChoice()
	if pl.User != user.TelegramID {
		return nil
	}
	chat, err := cr.ByTelegramID(pl.Chat)
	if err != nil {
		return err
	}
	if chat == nil || chat.ID == 0 {
		return nil
	}
	chat.KeyboardType = model.KeyboardType(result.Type)
	if err := cr.Save(chat); err != nil {
		return err
	}

	kbTypeName := "standard_vote_keyboard"
	if model.KeyboardType(result.Type) == model.StoryPointsKeyboard {
		kbTypeName = "sp_vote_keyboard"
	}
	loc := h.Localizer(user.Language)
	_, _ = h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(user.ChatID),
		MessageID: msgID,
		Text:      loc.Template("chosen_keyboard", map[string]interface{}{"Name": loc.Message(kbTypeName)}),
	})
	_, err = h.App.TG().SendMessage(&telego.SendMessageParams{
		ChatID:    tu.ID(user.ChatID),
		Text:      loc.Message("ask_for_redmine"),
		ParseMode: telego.ModeMarkdown,
		ReplyMarkup: &telego.InlineKeyboardMarkup{InlineKeyboard: [][]telego.InlineKeyboardButton{
			{
				{
					Text:         loc.Message("yes"),
					CallbackData: util.NewRedmineQuestionPayload(user.TelegramID, chat.TelegramID, true).String(),
				},
				{
					Text:         loc.Message("no"),
					CallbackData: util.NewRedmineQuestionPayload(user.TelegramID, chat.TelegramID, false).String(),
				},
			},
		}},
	})
	return err
}

func (h *CallbackQueryHandler) handleAnswerRedmine(answer util.Answer, chatID int64, msgID int, user *model.User) error {
	loc := h.Localizer(user.Language)
	if !answer.Result {
		_, _ = h.App.TG().EditMessageText(&telego.EditMessageTextParams{
			ChatID:    tu.ID(user.ChatID),
			MessageID: msgID,
			Text:      loc.Message("redmine_will_not_be_configured"),
		})
		return util.SendSetupDone(h.App.TG(), user.ChatID, loc)
	}
	_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(user.ChatID),
		MessageID: msgID,
		Text:      loc.Message("please_send_redmine_url"),
	})
	store.RedmineSetups.Set(user.ChatID, &store.RedmineSetup{Chat: chatID})
	return err
}

func (h *CallbackQueryHandler) handleAnswerRedmineHours(answer util.Answer, chatID int64, msgID int, user *model.User) error {
	loc := h.Localizer(user.Language)
	message := "redmine_hours_will_not_be_configured"
	if answer.Result {
		message = "redmine_hours_will_be_configured"
	}

	_, _ = h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(user.ChatID),
		MessageID: msgID,
		Text:      loc.Message(message),
	})

	rs, found := store.RedmineSetups.Get(user.ChatID)
	if found {
		rs.SaveHours = answer.Result
		if err := h.updateRedmineIntegration(rs, loc, user); err != nil {
			return err
		}
	}

	_, err := h.App.TG().SendMessage(&telego.SendMessageParams{
		ChatID:    tu.ID(user.ChatID),
		Text:      loc.Message("should_send_poker_to_redmine"),
		ParseMode: telego.ModeMarkdown,
		ReplyMarkup: &telego.InlineKeyboardMarkup{InlineKeyboard: [][]telego.InlineKeyboardButton{
			{
				{
					Text:         loc.Message("yes"),
					CallbackData: util.NewRedmineSendResultQuestionPayload(user.TelegramID, chatID, true).String(),
				},
				{
					Text:         loc.Message("no"),
					CallbackData: util.NewRedmineSendResultQuestionPayload(user.TelegramID, chatID, false).String(),
				},
			},
		}},
	})

	return err
}

func (h *CallbackQueryHandler) handleAnswerRedmineSendResults(answer util.Answer, msgID int, user *model.User) error {
	loc := h.Localizer(user.Language)
	if !answer.Result {
		_, _ = h.App.TG().EditMessageText(&telego.EditMessageTextParams{
			ChatID:    tu.ID(user.ChatID),
			MessageID: msgID,
			Text:      loc.Message("redmine_poker_will_not_be_configured"),
		})
		return util.SendSetupDone(h.App.TG(), user.ChatID, loc)
	}
	_, err := h.App.TG().EditMessageText(&telego.EditMessageTextParams{
		ChatID:    tu.ID(user.ChatID),
		MessageID: msgID,
		Text:      loc.Message("specify_result_field"),
	})
	rs, _ := store.RedmineSetups.Get(user.ChatID)
	rs.WaitingForSPField = true
	return err
}

func (h *CallbackQueryHandler) updateRedmineIntegration(rs *store.RedmineSetup, loc locale.Localizer, user *model.User) error {
	dbChat, err := h.App.DB().ForChat().ByTelegramID(rs.Chat)
	if dbChat == nil || dbChat.ID == 0 {
		_ = util.SendInternalError(h.App.TG(), user.ChatID, loc)
		return err
	}
	savedRedmine, err := h.App.DB().ForIntegration().LoadForChatAndType(dbChat.ID, model.RedmineIntegration)
	if savedRedmine == nil || savedRedmine.ID == 0 {
		_ = util.SendInternalError(h.App.TG(), user.ChatID, loc)
		return err
	}
	var shouldUpdate bool
	savedRS := savedRedmine.LoadRedmine()
	if savedRS.SaveHours != rs.SaveHours {
		savedRS.SaveHours = rs.SaveHours
		shouldUpdate = true
	}
	if savedRS.SPFieldName != rs.SPFieldName {
		savedRS.SPFieldName = rs.SPFieldName
		shouldUpdate = true
	}
	if shouldUpdate {
		savedRedmine.StoreRedmine(savedRS)
		return h.App.DB().ForIntegration().Save(savedRedmine)
	}
	return nil
}