package bolt

import (
	"fmt"

	dg "github.com/bwmarrin/discordgo"
)

const (
	// the max discord allows for basic messages
	MSG_MAX_LENGTH = 2000
)

// the message struct is passed to the command payload providing basic
// message information and needed methods
type Message struct {
	Author      string   //username of message author
	ID          string   //discord ID of message author
	msgID       string   //id string of message
	Words       []string //words from message split on whitespace
	Content     string   //entire message content
	Channel     string   //message channel
	channelID   string   //id of channel message was sent in
	Server      string   //message guild
	serverID    string   //id of guild message was sent in
	Attachments []MessageAttachment
	sesh        *bolt
}

// applies reaction to message
func (m *Message) React(emoji Reaction) error {
	return m.sesh.MessageReactionAdd(m.channelID, m.msgID, fmt.Sprint(emoji))
}

// sends response to message, if the response length is greater than 2000 characters the
// messages are split and sent seperatly
func (m *Message) Respond(res string) error {
	if len(res) > MSG_MAX_LENGTH {
		for len(res) > 0 {
			//send full chunk size allowed by discord
			sc := res[:MSG_MAX_LENGTH]
			rep := m.sesh.createReply(sc, m.msgID, m.channelID, m.serverID)
			_, err := m.sesh.ChannelMessageSendComplex(m.channelID, rep)
			if err != nil {
				return err
			}
			res = res[MSG_MAX_LENGTH:]

			//if we have left than a full chunk send the rest and break the loop
			if len(res) < MSG_MAX_LENGTH {
				final := m.sesh.createReply(res, m.msgID, m.channelID, m.serverID)
				_, err := m.sesh.ChannelMessageSendComplex(m.channelID, final)
				if err != nil {
					return err
				}

				break
			}
		}

		return nil
	}

	//short enough message to send in one message
	rep := m.sesh.createReply(res, m.msgID, m.channelID, m.serverID)
	_, err := m.sesh.ChannelMessageSendComplex(m.channelID, rep)
	return err
}

// deletes the message from the channel
func (m *Message) Delete() error {
	return m.sesh.ChannelMessageDelete(m.channelID, m.msgID, nil)
}

// this struct has all of the needed information from the messageCreate event so that
// commands can be run asynchronously. Passing the messageCreate to payloads can block routines
type MessageCreateEvent struct {
	AuthorUsername string
	AuthorID       string
	AuthorRoles    []string
	MsgID          string
	Msg            string
	MsgChanID      string
	MsgChanName    string
	MsgGuildID     string
	MsgGuildName   string
	MsgAttachments []*dg.MessageAttachment
}

// message attachment details
type MessageAttachment struct {
	ID           string
	URL          string
	ProxyURL     string
	Filename     string
	ContentType  string
	Width        int
	Height       int
	Size         int
	DurationSecs float64
}