package models

import (
	"encoding/json"
	"regexp"
	"strings"
	"time"

	dbutils "github.com/TeaOSLab/EdgeAPI/internal/db/utils"
	"github.com/TeaOSLab/EdgeAPI/internal/errors"
	"github.com/TeaOSLab/EdgeAPI/internal/utils"
	"github.com/TeaOSLab/EdgeCommon/pkg/langs"
	_ "github.com/go-sql-driver/mysql"
	"github.com/iwind/TeaGo/Tea"
	"github.com/iwind/TeaGo/dbs"
	"github.com/iwind/TeaGo/types"
	timeutil "github.com/iwind/TeaGo/utils/time"
)

type LogDAO dbs.DAO

func NewLogDAO() *LogDAO {
	return dbs.NewDAO(&LogDAO{
		DAOObject: dbs.DAOObject{
			DB:     Tea.Env,
			Table:  "edgeLogs",
			Model:  new(Log),
			PkName: "id",
		},
	}).(*LogDAO)
}

var SharedLogDAO *LogDAO

func init() {
	dbs.OnReady(func() {
		SharedLogDAO = NewLogDAO()
	})
}

// CreateLog 创建管理员日志
func (this *LogDAO) CreateLog(tx *dbs.Tx, adminType string, adminId int64, level string, description string, action string, ip string, langMessageCode langs.MessageCode, langMessageArgs []any) error {
	var op = NewLogOperator()
	op.Level = level
	op.Description = utils.LimitString(description, 1000)
	op.Action = action
	op.Ip = ip
	op.Type = adminType

	switch adminType {
	case "admin":
		op.AdminId = adminId
	case "user":
		op.UserId = adminId
	case "provider":
		op.ProviderId = adminId
	}

	// i18n
	op.LangMessageCode = langMessageCode
	if len(langMessageArgs) > 0 {
		langMessageArgsJSON, err := json.Marshal(langMessageArgs)
		if err != nil {
			return err
		}
		op.LangMessageArgs = langMessageArgsJSON
	}

	op.Day = timeutil.Format("Ymd")
	op.Type = LogTypeAdmin
	err := this.Save(tx, op)
	return err
}

// CountLogs 计算所有日志数量
func (this *LogDAO) CountLogs(tx *dbs.Tx, dayFrom string, dayTo string, keyword string, userType string, level string) (int64, error) {
	dayFrom = this.formatDay(dayFrom)
	dayTo = this.formatDay(dayTo)

	var query = this.Query(tx)

	if len(dayFrom) > 0 {
		query.Gte("day", dayFrom)
	}
	if len(dayTo) > 0 {
		query.Lte("day", dayTo)
	}
	if len(keyword) > 0 {
		query.Where("(description LIKE :keyword OR ip LIKE :keyword OR action LIKE :keyword)").
			Param("keyword", dbutils.QuoteLike(keyword))
	}
	if len(level) > 0 {
		query.Attr("level", level)
	}

	// 用户类型
	switch userType {
	case "admin":
		query.Where("adminId>0")
	case "user":
		query.Where("userId>0")
	}

	return query.Count()
}

// ListLogs 列出单页日志
func (this *LogDAO) ListLogs(tx *dbs.Tx, offset int64, size int64, dayFrom string, dayTo string, keyword string, userType string, level string) (result []*Log, err error) {
	dayFrom = this.formatDay(dayFrom)
	dayTo = this.formatDay(dayTo)

	var query = this.Query(tx)
	if len(dayFrom) > 0 {
		query.Gte("day", dayFrom)
	}
	if len(dayTo) > 0 {
		query.Lte("day", dayTo)
	}
	if len(keyword) > 0 {
		query.Where("(description LIKE :keyword OR ip LIKE :keyword OR action LIKE :keyword)").
			Param("keyword", dbutils.QuoteLike(keyword))
	}

	if len(level) > 0 {
		query.Attr("level", level)
	}

	// 用户类型
	switch userType {
	case "admin":
		query.Where("adminId>0")
	case "user":
		query.Where("userId>0")
	}

	_, err = query.
		Offset(offset).
		Limit(size).
		Slice(&result).
		DescPk().
		FindAll()
	return
}

// DeleteLogPermanently 物理删除日志
func (this *LogDAO) DeleteLogPermanently(tx *dbs.Tx, logId int64) error {
	if logId <= 0 {
		return errors.New("invalid logId")
	}
	_, err := this.Delete(tx, logId)
	return err
}

// DeleteAllLogsPermanently 物理删除所有日志
func (this *LogDAO) DeleteAllLogsPermanently(tx *dbs.Tx) error {
	_, err := this.Query(tx).
		Delete()
	return err
}

// DeleteLogsPermanentlyBeforeDays 物理删除某些天之前的日志
func (this *LogDAO) DeleteLogsPermanentlyBeforeDays(tx *dbs.Tx, days int) error {
	if days <= 0 {
		days = 0
	}
	untilDay := timeutil.Format("Ymd", time.Now().AddDate(0, 0, -days))
	_, err := this.Query(tx).
		Lte("day", untilDay).
		Delete()
	return err
}

// SumLogsSize 计算当前日志容量大小
func (this *LogDAO) SumLogsSize() (int64, error) {
	col, err := this.Instance.FindCol(0, "SELECT DATA_LENGTH FROM information_schema.TABLES WHERE TABLE_SCHEMA=? AND TABLE_NAME=? LIMIT 1", this.Instance.Name(), this.Table)
	if err != nil {
		return 0, err
	}
	return types.Int64(col), nil
}

// 格式化日期
func (this *LogDAO) formatDay(day string) string {
	if !regexp.MustCompile(`^\d{4}-\d{2}-\d{2}$`).MatchString(day) {
		return ""
	}
	day = strings.ReplaceAll(day, "-", "")
	return day
}