package scoresaber

import (
	"database/sql"
	"log"
	"strconv"
	"time"

	_ "github.com/mattn/go-sqlite3"
)

func initDB() {
	db, err := sql.Open("sqlite3", "./bindss.db")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	createBindTableSQL := `CREATE TABLE IF NOT EXISTS ssBind (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        qqid TEXT UNIQUE,
		ssid TEXT UNIQUE
    );`

	createScoreTableSQL := `CREATE TABLE IF NOT EXISTS ssData (
		id TEXT,
		name TEXT,
		country TEXT,
		pp REAL,
		rank INTEGER,
		country_rank INTEGER,
		total_score INTEGER,
		total_ranked_score INTEGER,
		average_ranked_accuracy REAL,
		total_play_count INTEGER,
		ranked_play_count INTEGER,
		replays_watched INTEGER,
		generated_time TEXT
	);`

	_, err = db.Exec(createBindTableSQL)
	if err != nil {
		log.Fatal(err)
	}
	_, err = db.Exec(createScoreTableSQL)
	if err != nil {
		log.Fatal(err)
	}
}

type SSQuery struct {
	db *sql.DB
}

func NewSSQuery() *SSQuery {
	initDB()
	db, err := sql.Open("sqlite3", "./bindss.db")
	if err != nil {
		log.Fatal(err)
	}
	return &SSQuery{db: db}
}

func (ss *SSQuery) BindSS(qqId string, ssId string) (reply string) {
	tx, err := ss.db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	defer tx.Rollback()
	// ssId为数字
	if _, isNum := strconv.Atoi(ssId); isNum != nil {
		return "ssId格式错误,应当为一串数字"
	}
	data, _ := FetchPlayerData(ssId)
	if data == nil {
		return "未找到玩家"
	}
	//去重
	if rows, err := tx.Query("SELECT * FROM ssBind WHERE qqid = ?", qqId); err == nil {
		if rows.Next() {
			return "您已绑定过ss账号,请先输入\"解绑ss\"解绑"
		}
		rows.Close()
	}
	_, err = tx.Exec("INSERT INTO ssBind(qqid, ssid) VALUES(?, ?)", qqId, ssId)
	if err != nil {
		return "绑定失败"
	}
	err = tx.Commit()
	if err != nil {
		return "无法提交事务"
	}
	return "和用户名为 " + data.Name + " 的用户绑定成功，输入\"查ss\"查看个人数据"
}

func (ss *SSQuery) UnbindSS(qqId string) (reply string) {
	tx, err := ss.db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	defer tx.Rollback()
	//是否已绑定
	if rows, err := tx.Query("SELECT * FROM ssBind WHERE qqid = ?", qqId); err == nil {
		if !rows.Next() {
			return "您未绑定ss账号，输入\"绑定ss [ssId]\"绑定"
		}
		rows.Close()
	}
	_, err = tx.Exec("DELETE FROM ssBind WHERE qqid = ?", qqId)
	if err != nil {
		return "解绑失败"
	}
	err = tx.Commit()
	if err != nil {
		return "无法提交事务"
	}
	return "解绑成功，重新绑定请输入\"绑定ss [ssId]\""
}

func (ss *SSQuery) GetScore(qqId string) (reply string) {
	tx, err := ss.db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	defer tx.Rollback()
	//是否已绑定
	if rows, err := tx.Query("SELECT * FROM ssBind WHERE qqid = ?", qqId); err == nil {
		if !rows.Next() {
			return "您未绑定ss账号，输入\"绑定ss [ssId]\"绑定"
		}
	}
	var ssId string
	tx.QueryRow("SELECT ssid FROM ssBind WHERE qqid = ?", qqId).Scan(&ssId)
	data, _ := FetchPlayerData(ssId)
	if data == nil {
		return "查询出错，服务器返回了空数据"
	}
	dataLite := PlayerDataLite{
		ID:                    data.ID,
		Name:                  data.Name,
		Country:               data.Country,
		PP:                    data.PP,
		Rank:                  data.Rank,
		CountryRank:           data.CountryRank,
		TotalScore:            data.ScoreStats.TotalScore,
		TotalRankedScore:      data.ScoreStats.TotalRankedScore,
		AverageRankedAccuracy: data.ScoreStats.AverageRankedAccuracy,
		TotalPlayCount:        data.ScoreStats.TotalPlayCount,
		RankedPlayCount:       data.ScoreStats.RankedPlayCount,
		ReplaysWatched:        data.ScoreStats.ReplaysWatched,
		GeneratedTime:         time.Now(),
	}
	var lastDataLite PlayerDataLite
	tx.QueryRow("SELECT * FROM ssData WHERE id = ? ORDER BY generated_time DESC LIMIT 1", dataLite.ID).Scan(&lastDataLite.ID, &lastDataLite.Name, &lastDataLite.Country, &lastDataLite.PP, &lastDataLite.Rank, &lastDataLite.CountryRank, &lastDataLite.TotalScore, &lastDataLite.TotalRankedScore, &lastDataLite.AverageRankedAccuracy, &lastDataLite.TotalPlayCount, &lastDataLite.RankedPlayCount, &lastDataLite.ReplaysWatched, &lastDataLite.GeneratedTime)
	if lastDataLite.TotalPlayCount != dataLite.TotalPlayCount {
		tx.Exec("INSERT INTO ssData(id, name, country, pp, rank, country_rank, total_score, total_ranked_score, average_ranked_accuracy, total_play_count, ranked_play_count, replays_watched, generated_time) VALUES(?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13)", dataLite.ID, dataLite.Name, dataLite.Country, dataLite.PP, dataLite.Rank, dataLite.CountryRank, dataLite.TotalScore, dataLite.TotalRankedScore, dataLite.AverageRankedAccuracy, dataLite.TotalPlayCount, dataLite.RankedPlayCount, dataLite.ReplaysWatched, dataLite.GeneratedTime)
		err = tx.Commit()
		if err != nil {
			return "无法提交事务"
		}
		return data.LastDiffToString(lastDataLite)
	}
	err = tx.Commit()
	if err != nil {
		return "无法提交事务"
	}
	return data.ToString()
}