package repository

import (
	"fmt"
	"sort"
	"strings"
	"time"

	"be.ems/src/framework/database/db"
	"be.ems/src/framework/logger"
	"be.ems/src/modules/ne_data/model"
)

// 实例化数据层 KpiReport 结构体
var NewKpiReport = &KpiReport{}

// KpiReport 性能统计 数据层处理
type KpiReport struct{}

// SelectGoldKPI 通过网元指标数据信息
func (r KpiReport) SelectKPI(neType string, neId int64, query model.KPIQuery) []model.KpiReport {
	rows := []model.KpiReport{}
	if neType == "" {
		return rows
	}

	tx := db.DB("").Model(&model.KpiReport{})
	// 表名
	tableName := fmt.Sprintf("kpi_report_%s", strings.ToLower(neType))
	tx = tx.Table(tableName)
	// 构建查询条件
	if neId != 0 {
		tx = tx.Where("ne_id = ?", neId)
	}
	if query.BeginTime != 0 {
		tx = tx.Where("created_time >= ?", query.BeginTime)
	}
	if query.EndTime != 0 {
		tx = tx.Where("created_time <= ?", query.EndTime)
	}
	// 查询数据
	if err := tx.Find(&rows).Error; err != nil {
		logger.Errorf("query find err => %v", err.Error())
		return rows
	}
	// 排序
	r.sortRows(query.SortField, query.SortOrder, rows)
	return rows
}

// sortRows 排序数据集合
// sortField 排序字段 支持id timeGroup createdAt
// sortOrder 排序顺序 升序asc 降序desc
func (r KpiReport) sortRows(sortField, sortOrder string, rows []model.KpiReport) {
	if sortField == "" {
		return
	}
	sort.SliceStable(rows, func(i, j int) bool {
		// 支持的排序字段映射
		fieldGetters := map[string]func(*model.KpiReport) any{
			"id":          func(row *model.KpiReport) any { return row.ID },
			"timeGroup":   func(row *model.KpiReport) any { return row.CreatedTime },
			"createdTime": func(row *model.KpiReport) any { return row.CreatedTime },
			// 可添加更多支持的字段
		}

		// 获取字段 getter 函数
		getter, ok := fieldGetters[sortField]
		if !ok {
			// 非法字段，使用默认排序（id升序）
			return rows[i].ID < rows[j].ID
		}

		// 获取比较值
		valI, valJ := getter(&rows[i]), getter(&rows[j])

		// 根据字段类型进行比较
		switch v := valI.(type) {
		case int64:
			if sortOrder == "desc" {
				return v > valJ.(int64)
			}
			return v < valJ.(int64)
		case string:
			if sortOrder == "desc" {
				return v > valJ.(string)
			}
			return v < valJ.(string)
		default:
			// 不支持的字段类型，使用默认排序
			return rows[i].ID < rows[j].ID
		}
	})
}

// Insert 新增信息 返回新增数据ID
func (r KpiReport) Insert(neType string, param model.KpiReport) int64 {
	if neType == "" {
		return 0
	}
	if param.CreatedTime == 0 {
		param.CreatedTime = time.Now().UnixMilli()
	}
	// 表名
	tableName := fmt.Sprintf("kpi_report_%s", strings.ToLower(neType))
	// 执行插入
	if err := db.DB("").Table(tableName).Create(&param).Error; err != nil {
		errMsg := err.Error()
		// 动态创建表
		if strings.HasPrefix(errMsg, "Error 1146 (42S02): Table") {
			if err := r.createTableByMySQL(neType); err != nil {
				logger.Errorf("create table err => %v", err.Error())
				return 0
			}
		}
		if strings.HasPrefix(errMsg, "SQL logic error: no such table") {
			if err := r.createTableBySQLite(neType); err != nil {
				logger.Errorf("create table err => %v", err.Error())
				return 0
			}
		}
		logger.Errorf("insert err => %v", errMsg)
		return 0
	}
	return param.ID
}

// createTableByMySQL 创建表MySQL
func (r KpiReport) createTableByMySQL(neType string) error {
	lowerNeType := strings.ToLower(neType)
	sql := fmt.Sprintf(
		`
		CREATE TABLE IF NOT EXISTS kpi_report_%s (
			id int NOT NULL AUTO_INCREMENT,
			ne_id bigint DEFAULT '0' COMMENT '网元ID',
			created_time bigint DEFAULT '0' COMMENT '创建时间',
			record_time bigint DEFAULT '0' COMMENT '记录时间',
			index int NOT NULL COMMENT 'Index of the report',
			granularity int DEFAULT '60' COMMENT 'Time granualarity: 5/10/.../60/300 (second)',
			kpi_values text CHARACTER SET utf8mb4 COLLATE utf8mb4_bin COMMENT 'KPI values JSON String',
			PRIMARY KEY (id) USING BTREE,
			KEY idx_kpi_%s_ne_at (ne_id DESC, created_time DESC) USING BTREE COMMENT '索引-网元ID_记录时间'
		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='KPI_%s';
		`,
		lowerNeType, lowerNeType, strings.ToUpper(neType),
	)
	_, err := db.ExecDB("", sql, nil)
	return err
}

// createTableBySQLite 创建表SQLite
func (r KpiReport) createTableBySQLite(neType string) error {
	lowerNeType := strings.ToLower(neType)
	sql := fmt.Sprintf(
		`
		CREATE TABLE IF NOT EXISTS "kpi_report_%s" (
			"id" integer NOT NULL,
			"ne_id" integer,
			"created_time" integer,
			"record_time" integer,
			"index" integer NOT NULL,
			"granularity" integer,
			"kpi_values" text,
			PRIMARY KEY ("id")
		);

		CREATE INDEX IF NOT EXISTS "idx_kpi_%s_ne_at"
		ON "kpi_report_%s" (
			"ne_id" DESC,
			"created_time" DESC
		);
		`,
		lowerNeType, lowerNeType, lowerNeType,
	)
	_, err := db.ExecDB("", sql, nil)
	return err
}

// Select 查询数据
func (r KpiReport) Select(neType string, neId int64, beginTime, endTime int64) []model.KpiReport {
	rows := []model.KpiReport{}
	if neType == "" {
		return rows
	}
	tx := db.DB("").Model(&model.KpiReport{})
	// 表名
	tx = tx.Table(fmt.Sprintf("kpi_report_%s", strings.ToLower(neType)))
	tx = tx.Where("ne_id = ?", neId)
	tx = tx.Where("created_time >= ? and created_time <= ?", beginTime, endTime)
	// 查询数据
	if err := tx.Select("kpi_values", "created_time").Find(&rows).Error; err != nil {
		logger.Errorf("query find err => %v", err.Error())
		return rows
	}
	return rows
}

// SelectKPITitle 网元对应的指标名称
func (r KpiReport) SelectKPITitle(neType string) []model.KpiTitle {
	rows := []model.KpiTitle{}
	if neType == "" {
		return rows
	}
	tx := db.DB("").Model(&model.KpiTitle{})
	// 构建查询条件
	tx = tx.Where("ne_type = ? and status_flag = ?", neType, "1")
	// 查询数据
	if err := tx.Find(&rows).Error; err != nil {
		logger.Errorf("query find err => %v", err.Error())
		return rows
	}
	return rows
}

// SelectByPageTitle 分页查询集合
func (r KpiReport) TitleSelectByPage(query map[string]string) ([]model.KpiTitle, int64) {
	tx := db.DB("").Model(&model.KpiTitle{})
	// 查询条件拼接
	if v, ok := query["neType"]; ok && v != "" {
		tx = tx.Where("ne_type = ?", v)
	}
	if v, ok := query["kpiId"]; ok && v != "" {
		tx = tx.Where("kpi_id like ?", fmt.Sprintf("%s%%", v))
	}
	if v, ok := query["title"]; ok && v != "" {
		tx = tx.Where("cn_title like ? or en_title like ?", fmt.Sprintf("%%%s%%", v), fmt.Sprintf("%%%s%%", v))
	}
	if v, ok := query["statusFlag"]; ok && v != "" {
		tx = tx.Where("status_flag = ?", v)
	}

	// 查询结果
	var total int64 = 0
	rows := []model.KpiTitle{}

	// 查询数量 长度为0直接返回
	if err := tx.Count(&total).Error; err != nil || total <= 0 {
		return rows, total
	}

	// 分页
	pageNum, pageSize := db.PageNumSize(query["pageNum"], query["pageSize"])
	tx = tx.Offset(int(pageNum * pageSize)).Limit(int(pageSize))

	// 排序
	if v, ok := query["sortField"]; ok && v != "" {
		sortSql := v
		if o, ok := query["sortOrder"]; ok && o != "" {
			if o == "desc" {
				sortSql += " desc "
			} else {
				sortSql += " asc "
			}
		}
		tx = tx.Order(sortSql)
	}

	// 查询数据
	if err := tx.Find(&rows).Error; err != nil {
		logger.Errorf("query err => %v", err)
	}

	return rows, total
}

// TitleSelect 网元对应的指标名称
func (r KpiReport) TitleSelect(param model.KpiTitle) []model.KpiTitle {
	tx := db.DB("").Model(&model.KpiTitle{})
	// 构建查询条件
	if param.NeType != "" {
		tx = tx.Where("ne_type =?", param.NeType)
	}
	if param.KpiId != "" {
		tx = tx.Where("kpi_id = ?", param.KpiId)
	}
	if param.StatusFlag != "" {
		tx = tx.Where("status_flag = ?", param.StatusFlag)
	}
	// 查询数据
	rows := []model.KpiTitle{}
	if err := tx.Find(&rows).Error; err != nil {
		logger.Errorf("query find err => %v", err.Error())
		return rows
	}
	return rows
}

// TitleInsert 新增信息
func (r KpiReport) TitleInsert(param model.KpiTitle) int64 {
	tx := db.DB("").Create(&param)
	if err := tx.Error; err != nil {
		logger.Errorf("Create err => %v", err)
	}
	return param.ID
}

// TitleUpdate 修改信息
func (r KpiReport) TitleUpdate(param model.KpiTitle) int64 {
	if param.ID <= 0 {
		return 0
	}
	tx := db.DB("").Model(&model.KpiTitle{})
	// 构建查询条件
	tx = tx.Where("id = ?", param.ID)
	tx = tx.Omit("id", "title_json")
	// 执行更新
	if err := tx.Updates(param).Error; err != nil {
		logger.Errorf("update err => %v", err.Error())
		return 0
	}
	return tx.RowsAffected
}

// TitleDeleteByIds 批量删除信息
func (r KpiReport) TitleDeleteByIds(ids []int64) int64 {
	if len(ids) <= 0 {
		return 0
	}
	tx := db.DB("").Where("id in ?", ids)
	if err := tx.Delete(&model.KpiTitle{}).Error; err != nil {
		logger.Errorf("delete err => %v", err.Error())
		return 0
	}
	return tx.RowsAffected
}