package sql

import (
	"errors"
	"git.sxidc.com/go-tools/utils/strutils"
	"git.sxidc.com/service-supports/ds-sdk/sdk"
	"git.sxidc.com/service-supports/ds-sdk/sql/sql_tpl"
	"github.com/mitchellh/mapstructure"
	"reflect"
	"strings"
	"time"
)

// TODO Key字段校验零值

type Executor interface {
	ExecuteRawSql(sql string, executeParams map[string]any) ([]map[string]any, error)
	ExecuteSql(name string, executeParams map[string]any) ([]map[string]any, error)
}

const (
	createdTimeFieldName     = "CreatedTime"
	lastUpdatedTimeFieldName = "LastUpdatedTime"
)

func InsertEntity[T any](executor Executor, tableName string, e T) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if strutils.IsStringEmpty(tableName) {
		return errors.New("没有传递表名")
	}

	if reflect.TypeOf(e) == nil {
		return errors.New("没有传递实体")
	}

	sqlMapping, err := ParseSqlMapping(e)
	if err != nil {
		return err
	}

	tableRow := sql_tpl.NewTableRows()

	now := time.Now()

	for fieldName, sqlColumn := range sqlMapping.ColumnMap {
		fieldType := sqlColumn.ValueFieldType

		value := reflect.Zero(fieldType).Interface()
		if !sqlColumn.ValueFieldValue.IsZero() {
			value = sqlColumn.ValueFieldValue.Interface()
		}

		if (fieldName == createdTimeFieldName || fieldName == lastUpdatedTimeFieldName) &&
			fieldType.String() == "time.Time" && value.(time.Time).IsZero() {
			value = now
		}

		tableRow.Add(sqlColumn.Name, value)
	}

	executeParamsMap, err := sql_tpl.InsertExecuteParams{
		TableName: tableName,
		TableRows: tableRow,
	}.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.InsertTpl, executeParamsMap)
	if err != nil {
		if strings.Contains(err.Error(), "SQLSTATE 23505") {
			return sdk.ErrDBRecordHasExist
		}

		return err
	}

	return nil
}

func DeleteEntity[T any](executor Executor, tableName string, e T) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if strutils.IsStringEmpty(tableName) {
		return errors.New("没有传递表名")
	}

	if reflect.TypeOf(e) == nil {
		return errors.New("没有传递实体")
	}

	sqlMapping, err := ParseSqlMapping(e)
	if err != nil {
		return err
	}

	conditions := sql_tpl.NewConditions()

	for _, sqlColumn := range sqlMapping.ColumnMap {
		if !sqlColumn.IsKey {
			continue
		}

		fieldType := sqlColumn.ValueFieldType

		value := reflect.Zero(fieldType).Interface()
		if !sqlColumn.ValueFieldValue.IsZero() {
			value = sqlColumn.ValueFieldValue.Interface()
		}

		conditions.Equal(sqlColumn.Name, value)
	}

	executeParamsMap, err := sql_tpl.DeleteExecuteParams{
		TableName:  tableName,
		Conditions: conditions,
	}.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.DeleteTpl, executeParamsMap)
	if err != nil {
		return err
	}

	return nil
}

func UpdateEntity[T any](executor Executor, tableName string, e T) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if strutils.IsStringEmpty(tableName) {
		return errors.New("没有传递表名")
	}

	if reflect.TypeOf(e) == nil {
		return errors.New("没有传递实体")
	}

	sqlMapping, err := ParseSqlMapping(e)
	if err != nil {
		return err
	}

	tableRows := sql_tpl.NewTableRows()
	conditions := sql_tpl.NewConditions()

	now := time.Now()

	for fieldName, sqlColumn := range sqlMapping.ColumnMap {
		if !sqlColumn.IsKey && !sqlColumn.CanUpdate {
			continue
		}

		fieldType := sqlColumn.ValueFieldType

		value := reflect.Zero(fieldType).Interface()
		if !sqlColumn.ValueFieldValue.IsZero() {
			value = sqlColumn.ValueFieldValue.Interface()
		}

		if fieldName == lastUpdatedTimeFieldName &&
			fieldType.String() == "time.Time" && value.(time.Time).IsZero() {
			value = now
		}

		// 字段为空且不能清空，不更新
		if reflect.ValueOf(value).IsZero() && !sqlColumn.CanUpdateClear {
			continue
		}

		if !sqlColumn.IsKey {
			tableRows.Add(sqlColumn.Name, value)
		}

		if sqlColumn.IsKey {
			conditions.Equal(sqlColumn.Name, value)
		}
	}

	executeParamsMap, err := sql_tpl.UpdateExecuteParams{
		TableName:  tableName,
		TableRows:  tableRows,
		Conditions: conditions,
	}.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.UpdateTpl, executeParamsMap)
	if err != nil {
		return err
	}

	return nil
}

func Insert(executor Executor, executeParams *sql_tpl.InsertExecuteParams) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.InsertTpl, executeParamsMap)
	if err != nil {
		return err
	}

	return nil
}

func Delete(executor Executor, executeParams *sql_tpl.DeleteExecuteParams) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.DeleteTpl, executeParamsMap)
	if err != nil {
		return err
	}

	return nil
}

func Update(executor Executor, executeParams *sql_tpl.UpdateExecuteParams) error {
	if executor == nil {
		return errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return err
	}

	_, err = executor.ExecuteRawSql(sql_tpl.UpdateTpl, executeParamsMap)
	if err != nil {
		return err
	}

	return nil
}

func Query(executor Executor, executeParams *sql_tpl.QueryExecuteParams) ([]map[string]any, int64, error) {
	if executor == nil {
		return nil, 0, errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return nil, 0, errors.New("没有传递执行参数")
	}

	queryExecuteParamsMap, err := executeParams.Map()
	if err != nil {
		return nil, 0, err
	}

	countExecuteParamsMap, err := sql_tpl.CountExecuteParams{
		TableName:  executeParams.TableName,
		Conditions: executeParams.Conditions,
	}.Map()
	if err != nil {
		return nil, 0, err
	}

	tableRows, err := executor.ExecuteRawSql(sql_tpl.QueryTpl, queryExecuteParamsMap)
	if err != nil {
		return nil, 0, err
	}

	countTableRow, err := executor.ExecuteRawSql(sql_tpl.CountTpl, countExecuteParamsMap)
	if err != nil {
		return nil, 0, err
	}

	return tableRows, int64(countTableRow[0]["count"].(float64)), nil
}

func QueryOne(executor Executor, executeParams *sql_tpl.QueryOneExecuteParams) (map[string]any, error) {
	if executor == nil {
		return nil, errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return nil, errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return nil, err
	}

	tableRows, err := executor.ExecuteRawSql(sql_tpl.QueryTpl, executeParamsMap)
	if err != nil {
		return nil, err
	}

	if tableRows == nil || len(tableRows) == 0 {
		return nil, sdk.ErrDBRecordNotExist
	}

	return tableRows[0], nil
}

func Count(executor Executor, executeParams *sql_tpl.CountExecuteParams) (int64, error) {
	if executor == nil {
		return 0, errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return 0, errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return 0, err
	}

	tableRows, err := executor.ExecuteRawSql(sql_tpl.CountTpl, executeParamsMap)
	if err != nil {
		return 0, err
	}

	return int64(tableRows[0]["count"].(float64)), nil
}

func CheckExist(executor Executor, executeParams *sql_tpl.CheckExistExecuteParams) (bool, error) {
	if executor == nil {
		return false, errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return false, errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return false, err
	}

	tableRows, err := executor.ExecuteRawSql(sql_tpl.CountTpl, executeParamsMap)
	if err != nil {
		return false, err
	}

	return int64(tableRows[0]["count"].(float64)) > 0, nil
}

func CheckHasOnlyOne(executor Executor, executeParams *sql_tpl.CheckHasOnlyOneExecuteParams) (bool, error) {
	if executor == nil {
		return false, errors.New("没有传递执行器")
	}

	if executeParams == nil {
		return false, errors.New("没有传递执行参数")
	}

	executeParamsMap, err := executeParams.Map()
	if err != nil {
		return false, err
	}

	tableRows, err := executor.ExecuteRawSql(sql_tpl.CountTpl, executeParamsMap)
	if err != nil {
		return false, err
	}

	return int64(tableRows[0]["count"].(float64)) == 1, nil
}

func ExecuteRawSql(executor Executor, sql string, executeParams map[string]any) ([]map[string]any, error) {
	if executor == nil {
		return nil, errors.New("没有传递执行器")
	}

	if strutils.IsStringEmpty(sql) {
		return nil, errors.New("没有sql")
	}

	tableRows, err := executor.ExecuteRawSql(sql, executeParams)
	if err != nil {
		return nil, err
	}

	return tableRows, nil
}

func ExecuteSql(executor Executor, name string, executeParams map[string]any) ([]map[string]any, error) {
	if executor == nil {
		return nil, errors.New("没有传递执行器")
	}

	if strutils.IsStringEmpty(name) {
		return nil, errors.New("没有sql资源名称")
	}

	tableRows, err := executor.ExecuteSql(name, executeParams)
	if err != nil {
		return nil, err
	}

	return tableRows, nil
}

const (
	sqlResultTimeMicroFormat = "2006-01-02T15:04:05.000000+08:00"
	sqlResultTimeMilliFormat = "2006-01-02T15:04:05.000+08:00"
	sqlResultTimeSecFormat   = "2006-01-02T15:04:05+08:00"
)

// TODO 添加DecodeHook

func ParseSqlResults(results any, e any) error {
	decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		DecodeHook: func(f reflect.Type, t reflect.Type, data interface{}) (interface{}, error) {
			if f.Kind() != reflect.String {
				return data, nil
			}

			if t != reflect.TypeOf(time.Time{}) {
				return data, nil
			}

			var layout string
			timeStr := data.(string)
			if strings.HasSuffix(timeStr, ".000000+08:00") {
				layout = sqlResultTimeMicroFormat
			} else if strings.HasSuffix(timeStr, ".000+08:00") {
				layout = sqlResultTimeMilliFormat
			} else {
				layout = sqlResultTimeSecFormat
			}

			return time.ParseInLocation(layout, data.(string), time.Local)
		},
		Result: e,
	})
	if err != nil {
		return err
	}

	err = decoder.Decode(results)
	if err != nil {
		return err
	}

	return nil
}