package ctfc

import (
	"bytes"
	"os"
	"strings"

	"gitlab.com/Syndamia/ctfc/go-src/folderPaths"
	"gitlab.com/Syndamia/ctfc/go-src/utils"
)

type ChatProp int

const (
	chatNameProp ChatProp = iota + 1
	chatDescriptionProp
)

type Chat struct {
	Name        string
	Description string
	Owner       User
	Messages    []string
}

func (ch Chat) addMessage(value string, creatorUsername string) {
	value = creatorUsername + " : " + value
	ch.Messages = append(ch.Messages, value)

	utils.AppendToFile(folderPaths.FileAtChatsFolder(ch.Name), value+"\n")
}

func (ch Chat) updateProp(currentPassword string, newValue string, chatProp ChatProp) bool {
	if !loggedInUser.ValidatePassword(currentPassword) {
		return false
	}

	oldName, oldDesc := ch.Name, ch.Description

	chatFile := utils.GetFileContents(folderPaths.FileAtChatsFolder(ch.Name))

	switch chatProp {
	case chatNameProp:
		chatFile[0] = newValue
		ch.Name = newValue
	case chatDescriptionProp:
		chatFile[1] = newValue
		ch.Description = newValue
	default:
		return false
	}

	os.WriteFile(
		folderPaths.FileAtChatsFolder(oldName),
		[]byte(strings.Join(chatFile, "\n")),
		0644)

	if oldName != ch.Name {
		os.Rename(folderPaths.FileAtChatsFolder(oldName), folderPaths.FileAtChatsFolder(ch.Name))
	}

	allChatsFile, _ := os.ReadFile(folderPaths.AllChatsFilePath())
	allChatsUpdatedFile := strings.Replace(string(allChatsFile), oldName+" : "+oldDesc, ch.Name+" : "+ch.Description, 1)

	os.WriteFile(
		folderPaths.AllChatsFilePath(),
		[]byte(allChatsUpdatedFile),
		0644,
	)

	return true
}

func (ch Chat) UpdateName(password string, newName string) bool {
	return ch.updateProp(password, newName, chatNameProp)
}

func (ch Chat) UpdateDescription(password string, newDesc string) bool {
	return ch.updateProp(password, newDesc, chatDescriptionProp)
}

func createChat(data ...string) {
	chatFile, _ := os.Create(folderPaths.FileAtChatsFolder(data[0]))
	chatFile.WriteString(data[0] + "\n" + data[1] + "\n" + data[2] + "\n")
	chatFile.Close()

	utils.AppendToFile(folderPaths.AllChatsFilePath(), data[0]+" : "+data[1]+"\n")
}

func getChat(name string) Chat {
	f, _ := os.ReadFile(folderPaths.FileAtChatsFolder(name))
	values := bytes.Split(f, []byte("\n"))
	return Chat{string(values[0]), string(values[1]), getUser(string(values[2])), utils.TwoDByteArrayToStringArray(values[3 : len(values)-1])}
}

func getAllChats() []string {
	f, _ := os.ReadFile(folderPaths.AllChatsFilePath())
	values := bytes.Split(f, []byte("\n"))
	chats := utils.TwoDByteArrayToStringArray(values)
	return chats[:len(chats)-1]
}

func getOwnChats() (ownChats []string) {
	for _, v := range getAllChats() {
		f, _ := os.ReadFile(folderPaths.FileAtChatsFolder(strings.Split(v, " : ")[0]))
		if string(bytes.Split(f, []byte("\n"))[2]) == loggedInUser.Username {
			ownChats = append(ownChats, v)
		}
	}
	return
}