// Copyright 2015 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package xorm

import (
	"errors"
	"fmt"
	"reflect"
	"strconv"
	"strings"
	"time"
)

// str2PK convert string value to primary key value according to tp
func str2PKValue(s string, tp reflect.Type) (reflect.Value, error) {
	var err error
	var result interface{}
	var defReturn = reflect.Zero(tp)

	switch tp.Kind() {
	case reflect.Int:
		result, err = strconv.Atoi(s)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as int: %s", s, err.Error())
		}
	case reflect.Int8:
		x, err := strconv.Atoi(s)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as int8: %s", s, err.Error())
		}
		result = int8(x)
	case reflect.Int16:
		x, err := strconv.Atoi(s)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as int16: %s", s, err.Error())
		}
		result = int16(x)
	case reflect.Int32:
		x, err := strconv.Atoi(s)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as int32: %s", s, err.Error())
		}
		result = int32(x)
	case reflect.Int64:
		result, err = strconv.ParseInt(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as int64: %s", s, err.Error())
		}
	case reflect.Uint:
		x, err := strconv.ParseUint(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as uint: %s", s, err.Error())
		}
		result = uint(x)
	case reflect.Uint8:
		x, err := strconv.ParseUint(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as uint8: %s", s, err.Error())
		}
		result = uint8(x)
	case reflect.Uint16:
		x, err := strconv.ParseUint(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as uint16: %s", s, err.Error())
		}
		result = uint16(x)
	case reflect.Uint32:
		x, err := strconv.ParseUint(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as uint32: %s", s, err.Error())
		}
		result = uint32(x)
	case reflect.Uint64:
		result, err = strconv.ParseUint(s, 10, 64)
		if err != nil {
			return defReturn, fmt.Errorf("convert %s as uint64: %s", s, err.Error())
		}
	case reflect.String:
		result = s
	default:
		return defReturn, errors.New("unsupported convert type")
	}
	return reflect.ValueOf(result).Convert(tp), nil
}

func str2PK(s string, tp reflect.Type) (interface{}, error) {
	v, err := str2PKValue(s, tp)
	if err != nil {
		return nil, err
	}
	return v.Interface(), nil
}

func int64ToIntValue(id int64, tp reflect.Type) reflect.Value {
	var v interface{}
	kind := tp.Kind()

	if kind == reflect.Ptr {
		kind = tp.Elem().Kind()
	}

	switch kind {
	case reflect.Int16:
		temp := int16(id)
		v = &temp
	case reflect.Int32:
		temp := int32(id)
		v = &temp
	case reflect.Int:
		temp := int(id)
		v = &temp
	case reflect.Int64:
		temp := id
		v = &temp
	case reflect.Uint16:
		temp := uint16(id)
		v = &temp
	case reflect.Uint32:
		temp := uint32(id)
		v = &temp
	case reflect.Uint64:
		temp := uint64(id)
		v = &temp
	case reflect.Uint:
		temp := uint(id)
		v = &temp
	}

	if tp.Kind() == reflect.Ptr {
		return reflect.ValueOf(v).Convert(tp)
	}
	return reflect.ValueOf(v).Elem().Convert(tp)
}

func int64ToInt(id int64, tp reflect.Type) interface{} {
	return int64ToIntValue(id, tp).Interface()
}

func indexNoCase(s, sep string) int {
	return strings.Index(strings.ToLower(s), strings.ToLower(sep))
}

func splitNoCase(s, sep string) []string {
	idx := indexNoCase(s, sep)
	if idx < 0 {
		return []string{s}
	}
	return strings.Split(s, s[idx:idx+len(sep)])
}

func splitNNoCase(s, sep string, n int) []string {
	idx := indexNoCase(s, sep)
	if idx < 0 {
		return []string{s}
	}
	return strings.SplitN(s, s[idx:idx+len(sep)], n)
}

func makeArray(elem string, count int) []string {
	res := make([]string, count)
	for i := 0; i < count; i++ {
		res[i] = elem
	}
	return res
}

func rValue(bean interface{}) reflect.Value {
	return reflect.Indirect(reflect.ValueOf(bean))
}

func rType(bean interface{}) reflect.Type {
	sliceValue := reflect.Indirect(reflect.ValueOf(bean))
	// return reflect.TypeOf(sliceValue.Interface())
	return sliceValue.Type()
}

func structName(v reflect.Type) string {
	for v.Kind() == reflect.Ptr {
		v = v.Elem()
	}
	return v.Name()
}

func indexName(tableName, idxName string) string {
	return fmt.Sprintf("IDX_%v_%v", tableName, idxName)
}

func formatTime(t time.Time) string {
	return t.Format("2006-01-02 15:04:05")
}