package channelserver

import (
	"fmt"
	"github.com/bwmarrin/discordgo"
	"golang.org/x/crypto/bcrypt"
	"sort"
	"strings"
	"unicode"
)

type Player struct {
	CharName string
	QuestID  int
}

func getPlayerSlice(s *Server) []Player {
	var p []Player
	var questIndex int

	for _, channel := range s.Channels {
		for _, stage := range channel.stages {
			if len(stage.clients) == 0 {
				continue
			}
			questID := 0
			if stage.isQuest() {
				questIndex++
				questID = questIndex
			}
			for client := range stage.clients {
				p = append(p, Player{
					CharName: client.Name,
					QuestID:  questID,
				})
			}
		}
	}
	return p
}

func getCharacterList(s *Server) string {
	questEmojis := []string{
		":person_in_lotus_position:",
		":white_circle:",
		":red_circle:",
		":blue_circle:",
		":brown_circle:",
		":green_circle:",
		":purple_circle:",
		":yellow_circle:",
		":orange_circle:",
		":black_circle:",
	}

	playerSlice := getPlayerSlice(s)

	sort.SliceStable(playerSlice, func(i, j int) bool {
		return playerSlice[i].QuestID < playerSlice[j].QuestID
	})

	message := fmt.Sprintf("===== Online: %d =====\n", len(playerSlice))
	for _, player := range playerSlice {
		message += fmt.Sprintf("%s %s", questEmojis[player.QuestID], player.CharName)
	}

	return message
}

// onInteraction handles slash commands
func (s *Server) onInteraction(ds *discordgo.Session, i *discordgo.InteractionCreate) {
	switch i.Interaction.ApplicationCommandData().Name {
	case "verify":
		_, err := s.db.Exec("UPDATE users SET discord_id = $1 WHERE discord_token = $2", i.Member.User.ID, i.ApplicationCommandData().Options[0].StringValue())
		if err != nil {
			return
		}

		err = ds.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: "Erupe account successfully linked to Discord account.",
				Flags:   discordgo.MessageFlagsEphemeral,
			},
		})

		if err != nil {
			return
		}
		break
	case "password":
		password, _ := bcrypt.GenerateFromPassword([]byte(i.ApplicationCommandData().Options[0].StringValue()), 10)

		_, err := s.db.Exec("UPDATE users SET password = $1 WHERE discord_id = $2", password, i.Member.User.ID)
		if err != nil {
			s.logger.Error(fmt.Sprint(err))
			return
		}

		err = ds.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
			Type: discordgo.InteractionResponseChannelMessageWithSource,
			Data: &discordgo.InteractionResponseData{
				Content: "Password has been reset, you may login now.",
				Flags:   discordgo.MessageFlagsEphemeral,
			},
		})
		if err != nil {
			return
		}
		break
	}
}

// onDiscordMessage handles receiving messages from discord and forwarding them ingame.
func (s *Server) onDiscordMessage(ds *discordgo.Session, m *discordgo.MessageCreate) {
	// Ignore messages from bots, or messages that are not in the correct channel.
	if m.Author.Bot || m.ChannelID != s.erupeConfig.Discord.RelayChannel.RelayChannelID {
		return
	}

	paddedName := strings.TrimSpace(strings.Map(func(r rune) rune {
		if r > unicode.MaxASCII {
			return -1
		}
		return r
	}, m.Author.Username))
	for i := 0; i < 8-len(m.Author.Username); i++ {
		paddedName += " "
	}
	message := s.discordBot.NormalizeDiscordMessage(fmt.Sprintf("[D] %s > %s", paddedName, m.Content))
	if len(message) > s.erupeConfig.Discord.RelayChannel.MaxMessageLength {
		return
	}

	var messages []string
	lineLength := 61
	for i := 0; i < len(message); i += lineLength {
		end := i + lineLength
		if end > len(message) {
			end = len(message)
		}
		messages = append(messages, message[i:end])
	}
	for i := range messages {
		s.BroadcastChatMessage(messages[i])
	}
}