using Mono.Data.Sqlite;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DevelopEngine;
/// <summary>
/// 数据库管理类 在DBAccess工具类的基础上进一步封装适用本项目的数据库操作逻辑
/// </summary>
public class DBManager :Singleton<DBManager>
{
    DBAccess sqlDB;
    SqliteDataReader sqlReader;

    /// <summary>
    /// 文件路径
    /// </summary>
    /// <param name="path"></param>
    public  void InitDBManager(string path)
    {
        sqlDB = new DBAccess($"Data Source = {path}");
    }

    //断开连接
    public void CloseSqlConnectionDB()
    {
        sqlDB?.CloseSqlConnectionDB();
    }

    //创建数据库表
    public void CreatTable(string tableName, string[] col, string[] colType)
    {
        sqlDB.CreatTable(tableName, col, colType);
    }

    #region Demo
    public void CreatTableDemo()
    {
        sqlDB.CreatTable("TeacherTable", new string[] { "Name", "Subject", "StudentCounts", "PassCount" }, new string[] { "TEXT", "TEXT", "INTEGER", "INTEGER" });
        //sqlDB.CreatTable("RecordTable", new string[] { "'StudentName'", "'Date'", "'Duration'", "'TeacherName'","'Number'","'Result'" }, new string[] { "TEXT", "DATE TIME", "TEXT", "TEXT","TEXT", "TEXT" });
        //sqlDB.CreatTable("DataTable", new string[] { "'Date'", "'DataBytes'"}, new string[] { "DATE TIME", "BLOB" });//创建数据记录存储表
    }

    public void InsterDemo(string stname, string sex, string className, string stnumber, string stYear, string stZY, string teach, string phone)
    {
        sqlDB.InsterInto("StMessTable", new string[] { stname, sex, className, stnumber, stYear, stZY, teach, phone });
    }

    public void UpdateDemo(string stname, string sex, string className, string stnumber, string stYear, string stZY, string teach, string phone,string oldNumber)
    {
        sqlDB.UpdateValues("StMessTable", new string[] { "Name", "Sex", "Class", "Number", "Year", "College", "Teacher", "Phone" }, new string[] { "'" + stname + "'", "'" + sex + "'", "'" + className + "'", "'" + stnumber + "'", "'" + stYear + "'", "'" + stZY + "'", "'" + teach + "'", "'" + phone + "'" }, "Number", "=", "'" + oldNumber + "'");
    }



    /// <summary>
    /// 按姓名和时间查找
    /// </summary>
    /// <param name="name"></param>
    /// <param name="startTime"></param>
    /// <param name="finishTime"></param>
    public RecordClassDemo[] EnquireRecordDemo(string name, string startTime, string finishTime)
    {
        sqlReader = sqlDB.SelectDataAndName("RecordTable", "Date", "'" + startTime + " 00:00:00'", "'" + finishTime + " 23:59:59'", "StudentName", "'" + name + "'");
        return GetMessDemo(sqlReader);
    }


    RecordClassDemo[] GetMessDemo(SqliteDataReader reader)
    {
        List<RecordClassDemo> message = new List<RecordClassDemo>();
        while (reader.Read())
        {
            RecordClassDemo oneMessage = new RecordClassDemo();
            if (!reader.IsDBNull(sqlReader.GetOrdinal("User")))
                oneMessage.user = reader.GetString(sqlReader.GetOrdinal("User"));
            if (!reader.IsDBNull(sqlReader.GetOrdinal("StudentName")))
                oneMessage.msg = reader.GetString(sqlReader.GetOrdinal("Msg"));
            message.Add(oneMessage);
        }
        return message.ToArray();
    }



    #endregion


    #region  //历史数据操作

    /// <summary>
    /// 插入一条学员学习记录 不允许插入重复的数据 重复判定依据为 user+date
    /// </summary>
    internal bool InsterResultMsg(OperaterRecording operater)
    {
        string key = $"{operater.user}:{operater.date}";//学员+日期组成唯一键
        sqlReader = sqlDB.Select("LearnRecordTable", "Key", key);
        if (!sqlReader.HasRows)
        {
            byte[] bytes = BytesHelper.ClassToBytes<OperaterRecording>(operater);
            string sql = "INSERT INTO LearnRecordTable(Key, RecordData) values (@Key, @RecordData)";
            SqliteParameter[] parameters = new SqliteParameter[] {
               new SqliteParameter ("@Key", key),
               new SqliteParameter ("@RecordData", bytes)
          };
            sqlDB.ExecuteQuery(parameters, sql);
            return true;
        }
        return false;
    }

    /// <summary>
    /// 查询所有的记录数据
    /// </summary>
    /// <returns></returns>
    public OperaterRecording[] GetAllResultMsg()
    {
        sqlReader = sqlDB.GetAllLineMess("LearnRecordTable", "RecordData");
        return GetRecording();
    }

 
    /// <summary>
    /// 按姓名查找记录
    /// </summary>
    /// <param name="userName"></param>
    public OperaterRecording[] EnquireRecord(string user)
    {
        sqlReader = sqlDB.Select("LearnRecordTable", "User", user);
        return GetRecording();
    }

    /// <summary>
    /// 删除数据
    /// </summary>
    internal bool DeleteRecord(OperaterRecording operater)
    {
        string key = $"{operater.user}:{operater.date}";//学员+日期组成唯一键
        return sqlDB.DeleteValuesAND("LearnRecordTable", new string[] { "Key" }, new string[] { "=" }, new string[] { $"'{key}'" });
    }

    /// <summary>
    /// 按姓名和时间查找记录
    /// </summary>
    /// <param name="userName"></param>
    /// <param name="startTime"></param>
    /// <param name="finishTime"></param>
    public OperaterRecording[] EnquireRecord(string userName, string startTime, string finishTime)
    {
        sqlReader = sqlDB.SelectDataAndName("LearnRecordTable", "Date",  startTime + " 00:00:00",  finishTime + " 23:59:59", "StudentName",  userName);
        return GetRecording();
    }


    //读取完成后解析记录数据
    private OperaterRecording[] GetRecording()
    {
        if (!sqlReader.HasRows) return null;
        List<OperaterRecording> operaters = new List<OperaterRecording>();
        while (sqlReader.Read())
        {
            OperaterRecording oneMessage = new OperaterRecording();
            byte[] buffer = new byte[8192];//数据最大长度不超过8192
            long bytesRead = sqlReader.GetBytes(sqlReader.GetOrdinal("RecordData"), 0, buffer, 0, buffer.Length);
            byte[] actualRead = new byte[bytesRead];
            Array.Copy(buffer, 0, actualRead, 0, (int)bytesRead);
            oneMessage = BytesHelper.BytesToClass<OperaterRecording>(actualRead);
            operaters.Add(oneMessage);
        }
        return operaters.ToArray();
    }


    #endregion

    #region //AB包资源相关操作
    /// <summary>
    /// 删除AB包数据
    /// </summary>
    /// <param name="currentMsg"></param>
    internal void DeleteABMsg(string currentMsg)
    {
        sqlDB.DeleteValuesAND("AssetBundle", new string[] { "Name" }, new string[] { "=" }, new string[] { $"'{currentMsg}'" });

    }

    AssetBundleMsg[] GetABMsg(SqliteDataReader sqlReader)
    {
        List<AssetBundleMsg> abs = new List<AssetBundleMsg>();
        while (sqlReader.Read())
        {
            AssetBundleMsg oneMsg = new AssetBundleMsg();
            oneMsg.assetsName = sqlReader.GetString(sqlReader.GetOrdinal("Name"));
            oneMsg.type = (ABType)sqlReader.GetInt32(sqlReader.GetOrdinal("Type"));
            oneMsg.filePath = sqlReader.GetString(sqlReader.GetOrdinal("FilePath"));
            oneMsg.parentName = sqlReader.GetString(sqlReader.GetOrdinal("ParentName"));
            abs.Add(oneMsg);
        }
        return abs.ToArray();
    }


    string[] GetNames(SqliteDataReader reader)
    {
        List<string> names = new List<string>();
        while (reader.Read())
        {
            string oneName = null;
            if (!reader.IsDBNull(sqlReader.GetOrdinal("Name")))
                oneName = reader.GetString(sqlReader.GetOrdinal("Name"));
            if (!string.IsNullOrEmpty(oneName))
                names.Add(oneName);
        }
        return names.ToArray();
    }

    //插入新数据时 判断是否存在已有数据  若存在则更新  避免出现添加多个同装备的情况
    internal void InsterABMsg(AssetBundleMsg currentMsg)
    {
        sqlReader = sqlDB.Select("AssetBundle", "Name", currentMsg.assetsName);
        if (sqlReader.HasRows)
        {
            UpdateABMsg(currentMsg);
        }
        else
            sqlDB.InsterInto("AssetBundle", new string[] { currentMsg.assetsName, ((int)currentMsg.type).ToString(), currentMsg.filePath, currentMsg.parentName });
    }

    void UpdateABMsg(AssetBundleMsg currentMsg)
    {
        sqlDB.UpdateValues("AssetBundle", new string[] { "Type","FilePath", "ParentName" },new string[] {((int)currentMsg.type).ToString(),currentMsg.filePath,currentMsg.parentName },"Name","=", currentMsg.assetsName);
    }



    public string[] GetABNames(ABType aBType)
    {
        sqlReader = sqlDB.Select("AssetBundle", "Type", ((int)aBType).ToString());
        return GetNames(sqlReader);
    }

    //获取车载装备和车辆配置关系 key 车辆 value车载装备
    public XDictionary<string, string> GetOnBoardEquip()
    {
        sqlReader = sqlDB.Select("AssetBundle", "Type", ((int) ABType.工具).ToString());
        XDictionary<string, string> pairs = new XDictionary<string, string>();
        while (sqlReader.Read())
        {
            string equipName = null;
            if (!sqlReader.IsDBNull(sqlReader.GetOrdinal("Name")))
                equipName = sqlReader.GetString(sqlReader.GetOrdinal("Name"));
            if (!sqlReader.IsDBNull(sqlReader.GetOrdinal("ParentName")))
                pairs[sqlReader.GetString(sqlReader.GetOrdinal("ParentName"))]= equipName;
        }
        return pairs;
    }

    public AssetBundleMsg[] GetABMsg()
    {
        sqlReader = sqlDB.ReaderFullTable("AssetBundle");
        return GetABMsg(sqlReader);
    }
#endregion

    #region 用户数据相关操作
    //用户登录查询
    public bool CheckUserLogin(User user)
    {
        sqlReader = sqlDB.Select(GetUserTable(user.userType), new string[] { "user" }, new string[] { "user", "password" }, new string[] { user.user, user.password });
        return !sqlReader.IsDBNull(sqlReader.GetOrdinal("user"));//能查询到该用户 
    }

    //添加用户
    public bool InsterUser(User userMsg)
    {
        sqlReader = sqlDB.Select(GetUserTable(userMsg.userType), "user", userMsg.user);
        if(!sqlReader.HasRows)//查询 避免重复插入输入
        { 
            sqlDB.InsterInto(GetUserTable(userMsg.userType), new string[] {userMsg.user,userMsg.password});
            return true;
        }
        return false;
    }

    //查找所有用户
    public User[] GetAllUser(UserType userType)
    {
        sqlReader = sqlDB.ReaderFullTable(GetUserTable(userType));
        List<User> userLis = new List<User>();
        while (sqlReader.Read())
        {
            User oneMessage = new User();
            if (!sqlReader.IsDBNull(sqlReader.GetOrdinal("user")))
                oneMessage.user = sqlReader.GetString(sqlReader.GetOrdinal("user"));
            if (!sqlReader.IsDBNull(sqlReader.GetOrdinal("password")))
                oneMessage.password = sqlReader.GetString(sqlReader.GetOrdinal("password"));
            oneMessage.userType = userType;
            userLis.Add(oneMessage);
        }
        return userLis.ToArray();
    }

    //删除用户
    public void DeleteUser(User user)
    {
        sqlDB.DeleteValuesAND(GetUserTable(user.userType), new string[] { "user" }, new string[] { "=" }, new string[] { $"'{user.user}'" });
    }

    //更新用户密码
    public void UpdateUser(User user)
    {
        sqlDB.UpdateValues(GetUserTable(user.userType), new string[] { "user", "password" }, new string[] {user.user,user.password }, "user", "=", user.user);
    }


    /// <summary>
    /// 根据用户类型获取 数据库表名称
    /// </summary>
    /// <param name="user"></param>
    /// <returns></returns>
    private string GetUserTable(UserType user)
    {
        string tableName = "";
        switch (user)
        {
            case UserType.student:
                tableName = "StudentUser";
                break;
            case UserType.Teacher:
                tableName = "TeacherUser";
                break;
            default:
                break;
        }
        return tableName;
    }
    #endregion

}

//成功插入一条数据时返回的操作类型  
//用于某些带有唯一标识且可能重复插入数据的表单 
public enum InsterType
{
    /// <summary>
    /// 新数据
    /// </summary>
    newData,

    /// <summary>
    /// 覆盖一条原有数据
    /// </summary>
    overwrite,
}