// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2021 Tulir Asokan
//
// 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 database

import (
	"database/sql"
	"time"

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

	"maunium.net/go/mautrix/id"
	"maunium.net/go/mautrix/util/dbutil"

	"go.mau.fi/whatsmeow/types"
)

type PuppetQuery struct {
	db  *Database
	log log.Logger
}

func (pq *PuppetQuery) New() *Puppet {
	return &Puppet{
		db:  pq.db,
		log: pq.log,

		EnablePresence: true,
		EnableReceipts: true,
	}
}

func (pq *PuppetQuery) GetAll() (puppets []*Puppet) {
	rows, err := pq.db.Query("SELECT username, avatar, avatar_url, displayname, name_quality, name_set, avatar_set, last_sync, custom_mxid, access_token, next_batch, enable_presence, enable_receipts FROM puppet")
	if err != nil || rows == nil {
		return nil
	}
	defer rows.Close()
	for rows.Next() {
		puppets = append(puppets, pq.New().Scan(rows))
	}
	return
}

func (pq *PuppetQuery) Get(jid types.JID) *Puppet {
	row := pq.db.QueryRow("SELECT username, avatar, avatar_url, displayname, name_quality, name_set, avatar_set, last_sync, custom_mxid, access_token, next_batch, enable_presence, enable_receipts FROM puppet WHERE username=$1", jid.User)
	if row == nil {
		return nil
	}
	return pq.New().Scan(row)
}

func (pq *PuppetQuery) GetByCustomMXID(mxid id.UserID) *Puppet {
	row := pq.db.QueryRow("SELECT username, avatar, avatar_url, displayname, name_quality, name_set, avatar_set, last_sync, custom_mxid, access_token, next_batch, enable_presence, enable_receipts FROM puppet WHERE custom_mxid=$1", mxid)
	if row == nil {
		return nil
	}
	return pq.New().Scan(row)
}

func (pq *PuppetQuery) GetAllWithCustomMXID() (puppets []*Puppet) {
	rows, err := pq.db.Query("SELECT username, avatar, avatar_url, displayname, name_quality, name_set, avatar_set, last_sync, custom_mxid, access_token, next_batch, enable_presence, enable_receipts FROM puppet WHERE custom_mxid<>''")
	if err != nil || rows == nil {
		return nil
	}
	defer rows.Close()
	for rows.Next() {
		puppets = append(puppets, pq.New().Scan(rows))
	}
	return
}

type Puppet struct {
	db  *Database
	log log.Logger

	JID         types.JID
	Avatar      string
	AvatarURL   id.ContentURI
	AvatarSet   bool
	Displayname string
	NameQuality int8
	NameSet     bool
	LastSync    time.Time

	CustomMXID     id.UserID
	AccessToken    string
	NextBatch      string
	EnablePresence bool
	EnableReceipts bool
}

func (puppet *Puppet) Scan(row dbutil.Scannable) *Puppet {
	var displayname, avatar, avatarURL, customMXID, accessToken, nextBatch sql.NullString
	var quality, lastSync sql.NullInt64
	var enablePresence, enableReceipts, nameSet, avatarSet sql.NullBool
	var username string
	err := row.Scan(&username, &avatar, &avatarURL, &displayname, &quality, &nameSet, &avatarSet, &lastSync, &customMXID, &accessToken, &nextBatch, &enablePresence, &enableReceipts)
	if err != nil {
		if err != sql.ErrNoRows {
			puppet.log.Errorln("Database scan failed:", err)
		}
		return nil
	}
	puppet.JID = types.NewJID(username, types.DefaultUserServer)
	puppet.Displayname = displayname.String
	puppet.Avatar = avatar.String
	puppet.AvatarURL, _ = id.ParseContentURI(avatarURL.String)
	puppet.NameQuality = int8(quality.Int64)
	puppet.NameSet = nameSet.Bool
	puppet.AvatarSet = avatarSet.Bool
	if lastSync.Int64 > 0 {
		puppet.LastSync = time.Unix(lastSync.Int64, 0)
	}
	puppet.CustomMXID = id.UserID(customMXID.String)
	puppet.AccessToken = accessToken.String
	puppet.NextBatch = nextBatch.String
	puppet.EnablePresence = enablePresence.Bool
	puppet.EnableReceipts = enableReceipts.Bool
	return puppet
}

func (puppet *Puppet) Insert() {
	if puppet.JID.Server != types.DefaultUserServer {
		puppet.log.Warnfln("Not inserting %s: not a user", puppet.JID)
		return
	}
	var lastSyncTs int64
	if !puppet.LastSync.IsZero() {
		lastSyncTs = puppet.LastSync.Unix()
	}
	_, err := puppet.db.Exec(`
		INSERT INTO puppet (username, avatar, avatar_url, avatar_set, displayname, name_quality, name_set, last_sync,
		                    custom_mxid, access_token, next_batch, enable_presence, enable_receipts)
		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)
	`, puppet.JID.User, puppet.Avatar, puppet.AvatarURL.String(), puppet.AvatarSet, puppet.Displayname,
		puppet.NameQuality, puppet.NameSet, lastSyncTs, puppet.CustomMXID, puppet.AccessToken, puppet.NextBatch,
		puppet.EnablePresence, puppet.EnableReceipts,
	)
	if err != nil {
		puppet.log.Warnfln("Failed to insert %s: %v", puppet.JID, err)
	}
}

func (puppet *Puppet) Update() {
	var lastSyncTs int64
	if !puppet.LastSync.IsZero() {
		lastSyncTs = puppet.LastSync.Unix()
	}
	_, err := puppet.db.Exec(`
		UPDATE puppet
		SET displayname=$1, name_quality=$2, name_set=$3, avatar=$4, avatar_url=$5, avatar_set=$6, last_sync=$7,
		    custom_mxid=$8, access_token=$9, next_batch=$10, enable_presence=$11, enable_receipts=$12
		WHERE username=$13
	`, puppet.Displayname, puppet.NameQuality, puppet.NameSet, puppet.Avatar, puppet.AvatarURL.String(), puppet.AvatarSet,
		lastSyncTs, puppet.CustomMXID, puppet.AccessToken, puppet.NextBatch, puppet.EnablePresence, puppet.EnableReceipts,
		puppet.JID.User)
	if err != nil {
		puppet.log.Warnfln("Failed to update %s: %v", puppet.JID, err)
	}
}