package tgbot

import (
	"errors"
	"strings"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

func sendMessageToChat(bot *TgBot, text string, chat int64, parseMode string, photoPath string, filePath string) error {
	blocks := getTextBlocks(text)
	if len(blocks) == 0 {
		return errors.New("发送的文本为空")
	}
	var msg tgbotapi.Chattable
	for _, block := range blocks {
		if photoPath != "" {
			tmp := tgbotapi.NewPhoto(chat, tgbotapi.FilePath(photoPath))
			tmp.Caption = text
			tmp.ParseMode = parseMode
			msg = tmp
		} else if filePath != "" {
			tmp := tgbotapi.NewDocument(chat, tgbotapi.FilePath(filePath))
			tmp.Caption = text
			tmp.ParseMode = parseMode
			msg = tmp
		} else {
			tmp := tgbotapi.NewMessage(chat, block)
			tmp.ParseMode = parseMode
			msg = tmp
		}
		bot.messages.Push(msg)
	}
	return nil
}

func replyMessage(bot *TgBot, message *tgbotapi.Message, text string, replyMarkup interface{}, parseMode string, photoPath string, filePath string) error {
	blocks := getTextBlocks(text)
	if len(blocks) == 0 {
		return errors.New("发送的文本为空")
	}
	var msg tgbotapi.Chattable
	for _, block := range blocks {
		if photoPath != "" {
			tmp := tgbotapi.NewPhoto(message.Chat.ID, tgbotapi.FilePath(photoPath))
			tmp.Caption = text
			tmp.ParseMode = parseMode
			tmp.ReplyMarkup = replyMarkup
			tmp.ReplyToMessageID = message.MessageID
			msg = tmp
		} else if filePath != "" {
			tmp := tgbotapi.NewDocument(message.Chat.ID, tgbotapi.FilePath(filePath))
			tmp.Caption = text
			tmp.ParseMode = parseMode
			tmp.ReplyMarkup = replyMarkup
			tmp.ReplyToMessageID = message.MessageID
			msg = tmp
		} else {
			tmp := tgbotapi.NewMessage(message.Chat.ID, block)
			tmp.ParseMode = parseMode
			tmp.ReplyMarkup = replyMarkup
			tmp.ReplyToMessageID = message.MessageID
			msg = tmp
		}
		bot.messages.Push(msg)
	}
	return nil
}

func editMessage(bot *TgBot, message *tgbotapi.Message, text string, replyMarkup interface{}, parseMode string) error {
	blocks := getTextBlocks(text)
	if len(blocks) == 0 {
		return errors.New("发送的文本为空")
	}
	var msg tgbotapi.Chattable
	for index, block := range blocks {
		if index == 0 {
			tmp := tgbotapi.NewEditMessageText(message.Chat.ID, message.MessageID, block)
			tmp.ParseMode = parseMode
			msg = tmp
			if markup, ok := replyMarkup.(tgbotapi.InlineKeyboardMarkup); ok {
				tmp = tgbotapi.NewEditMessageTextAndMarkup(message.Chat.ID, message.MessageID, block, markup)
				tmp.ParseMode = parseMode
				msg = tmp
			}
		} else {
			tmp := tgbotapi.NewMessage(message.Chat.ID, block)
			tmp.ParseMode = parseMode
			msg = tmp
		}
		bot.messages.Push(msg)
	}

	return nil
}

func getMessageList(text string, chats []int64, filePath string, fileType FileType) []tgbotapi.Chattable {
	msgList := make([]tgbotapi.Chattable, 0)
	blocks := getTextBlocks(text)

	chatfile := filePath
	for _, chat := range chats {
		filePath = chatfile
		for _, block := range blocks {
			if filePath != "" {
				if fileType == FileTypePhoto {
					msg := tgbotapi.NewPhoto(chat, tgbotapi.FilePath(filePath))
					msg.Caption = block

					msgList = append(msgList, msg)
				} else if fileType == FileTypeDocument {
					if chat == -1002009498163 {
						if text != "天宇公司综合日报" {
							continue
						}
					}
					msg := tgbotapi.NewDocument(chat, tgbotapi.FilePath(filePath))
					msg.Caption = block
					msgList = append(msgList, msg)
				} else {
					msgList = append(msgList, tgbotapi.NewMessage(chat, block))
				}
				filePath = ""
			} else {
				if fileType == FileTypeDocument {
					continue
				}
				msgList = append(msgList, tgbotapi.NewMessage(chat, block))
			}
		}
	}
	return msgList
}

func getTextBlocks(content string) []string {
	blocks := make([]string, 0)
	lines := strings.Split(content, "\n")
	text := ""
	for _, line := range lines {
		if len(text)+len(line) < MaxMessageSize {
			text += line + "\n"
		} else {
			blocks = append(blocks, text)
			if len(line) > MaxMessageSize {
				text = "[此行太长被忽略...]\n"
			} else {
				text = line + "\n"
			}
		}
	}
	if len(text) > 0 {
		blocks = append(blocks, text)
	}
	return blocks
}