package core

import (
	"fmt"
	"strings"

	"git.exozy.me/exozyme/status/scanner"
	m "maunium.net/go/mautrix"
	"maunium.net/go/mautrix/event"
	. "maunium.net/go/mautrix/id"
)

type MatrixConfig struct {
	UserId string
	// The AccessToken can be got by logging in with any Matrix client.
	// In element.io, find it under Settings -> About & Help -> Advanced.
	AccessToken string
	RoomId      string
	HomeServer  string
}

type MatrixClient struct {
	inner  m.Client
	config MatrixConfig
	// Resolved/opaque Room Id
	room_id RoomID
}

func NewMatrixClient(config MatrixConfig) (*MatrixClient, error) {
	if config.AccessToken == "" {
		return nil, fmt.Errorf("no access token")
	}

	user_id := UserID(config.UserId)
	homeserver := config.HomeServer
	if homeserver == "" {
		homeserver = user_id.Homeserver()
	}
	client, err := m.NewClient(homeserver, user_id, config.AccessToken)
	if err != nil {
		return nil, err
	}

	var opaque_room_id RoomID
	if strings.HasPrefix(config.RoomId, "!") {
		opaque_room_id = RoomID(config.RoomId)
	} else {
		resp, err := client.ResolveAlias(RoomAlias(config.RoomId))
		if err != nil {
			return nil, err
		}
		opaque_room_id = resp.RoomID
	}

	return &MatrixClient{
		inner:   *client,
		config:  config,
		room_id: opaque_room_id,
	}, nil
}

func (client *MatrixClient) SendNotice(message string) (*m.RespSendEvent, error) {
	return client.inner.SendNotice(client.room_id, message)
}

func (client *MatrixClient) SendNoticeHTML(plain string, html string, status *[]scanner.ServiceStatus) (*m.RespSendEvent, error) {
	return client.inner.SendMessageEvent(client.room_id, event.EventMessage,
		&StatusMessageEventContent{
			event.MessageEventContent{
				MsgType:       event.MsgNotice,
				Body:          plain,
				Format:        "org.matrix.custom.html",
				FormattedBody: html,
			},
			status,
		})
}

func (client *MatrixClient) RedactEvent(eventId EventID, reason string) (*m.RespSendEvent, error) {
	return client.inner.RedactEvent(client.room_id, eventId, m.ReqRedact{Reason: reason})
}

type StatusMessageEventContent struct {
	event.MessageEventContent
	StatusEvent *[]scanner.ServiceStatus `json:"me.exozy.status,omitempty"`
}