// mautrix-groupme - A Matrix-GroupMe puppeting bridge.
// Copyright (C) 2022 Sumner Evans, Karmanyaah Malhotra
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package main

import (
	"regexp"
	"sync"

	log "maunium.net/go/maulogger/v2"

	"gitea.watsonlabs.net/watsonb8/groupme-lib"

	"maunium.net/go/mautrix/appservice"
	"maunium.net/go/mautrix/id"

	"github.com/beeper/groupme/database"
)

var userIDRegex *regexp.Regexp

type Puppet struct {
	*database.Puppet

	bridge *GMBridge
	log    log.Logger

	typingIn id.RoomID
	typingAt int64

	MXID id.UserID

	customIntent   *appservice.IntentAPI
	customTypingIn map[id.RoomID]bool
	customUser     *User

	syncLock sync.Mutex
}

func (puppet *Puppet) ClearCustomMXID() {
	//TODO implement me
	panic("implement me")
}

// Public Properties

func (puppet *Puppet) GetMXID() id.UserID {
	return puppet.MXID
}

func (puppet *Puppet) PhoneNumber() string {
	return puppet.GMID.String()
}

// Public Methods

func (puppet *Puppet) IntentFor(portal *Portal) *appservice.IntentAPI {
	if puppet.customIntent == nil || portal.Key.GMID == puppet.GMID {
		return puppet.DefaultIntent()
	}
	return puppet.customIntent
}

func (puppet *Puppet) CustomIntent() *appservice.IntentAPI {
	return puppet.customIntent
}

func (puppet *Puppet) DefaultIntent() *appservice.IntentAPI {
	return puppet.bridge.AS.Intent(puppet.MXID)
}

func (puppet *Puppet) UpdateAvatar(source *User, forcePortalSync bool) bool {
	changed := source.updateAvatar(puppet.GMID, &puppet.Avatar, &puppet.AvatarURL, &puppet.AvatarSet, puppet.log, puppet.DefaultIntent())
	if !changed || puppet.Avatar == "unauthorized" {
		if forcePortalSync {
			go puppet.updatePortalAvatar()
		}
		return changed
	}
	err := puppet.DefaultIntent().SetAvatarURL(puppet.AvatarURL)
	if err != nil {
		puppet.log.Warnln("Failed to set avatar:", err)
	} else {
		puppet.AvatarSet = true
	}
	go puppet.updatePortalAvatar()
	return true
}

func (puppet *Puppet) UpdateName(member groupme.Member, forcePortalSync bool) bool {
	newName := puppet.bridge.Config.Bridge.FormatDisplayname(puppet.GMID, member)
	if puppet.Displayname != newName || !puppet.NameSet {
		oldName := puppet.Displayname
		puppet.Displayname = newName
		puppet.NameSet = false
		err := puppet.DefaultIntent().SetDisplayName(newName)
		if err == nil {
			puppet.log.Debugln("Updated name", oldName, "->", newName)
			puppet.NameSet = true
			go puppet.updatePortalName()
		} else {
			puppet.log.Warnln("Failed to set display name:", err)
		}
		return true
	} else if forcePortalSync {
		go puppet.updatePortalName()
	}
	return false
}

func (puppet *Puppet) updatePortalMeta(meta func(portal *Portal)) {
	if puppet.bridge.Config.Bridge.PrivateChatPortalMeta || puppet.bridge.Config.Bridge.Encryption.Allow {
		for _, portal := range puppet.bridge.GetAllPortalsByGMID(puppet.GMID) {
			if !puppet.bridge.Config.Bridge.PrivateChatPortalMeta && !portal.Encrypted {
				continue
			}
			// Get room create lock to prevent races between receiving contact info and room creation.
			portal.roomCreateLock.Lock()
			meta(portal)
			portal.roomCreateLock.Unlock()
		}
	}
}

func (puppet *Puppet) updatePortalAvatar() {
	puppet.updatePortalMeta(func(portal *Portal) {
		if portal.Avatar == puppet.Avatar && portal.AvatarURL == puppet.AvatarURL && portal.AvatarSet {
			return
		}
		portal.AvatarURL = puppet.AvatarURL
		portal.Avatar = puppet.Avatar
		portal.AvatarSet = false
		defer portal.Update(nil)
		if len(portal.MXID) > 0 {
			_, err := portal.MainIntent().SetRoomAvatar(portal.MXID, puppet.AvatarURL)
			if err != nil {
				portal.log.Warnln("Failed to set avatar:", err)
			} else {
				portal.AvatarSet = true
				portal.UpdateBridgeInfo()
			}
		}
	})
}

func (puppet *Puppet) updatePortalName() {
	puppet.updatePortalMeta(func(portal *Portal) {
		portal.UpdateName(puppet.Displayname, groupme.ID(""), true)
	})
}

func (puppet *Puppet) Sync(source *User, member *groupme.Member, forceAvatarSync bool, forcePortalSync bool) {
	puppet.syncLock.Lock()
	defer puppet.syncLock.Unlock()
	err := puppet.DefaultIntent().EnsureRegistered()
	if err != nil {
		puppet.log.Errorln("Failed to ensure registered:", err)
	}

	update := false
	update = puppet.UpdateName(*member, forcePortalSync) || update
	update = puppet.UpdateAvatar(source, forcePortalSync) || update
	if update {
		puppet.Update()
	}
}