package xorm

import (
	"fmt"
	"reflect"
	"sort"
	"strconv"
	"strings"
	"time"

	"github.com/go-xorm/core"
)

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 sliceEq(left, right []string) bool {
	if len(left) != len(right) {
		return false
	}
	sort.Sort(sort.StringSlice(left))
	sort.Sort(sort.StringSlice(right))
	for i := 0; i < len(left); i++ {
		if left[i] != right[i] {
			return false
		}
	}
	return true
}

func reflect2value(rawValue *reflect.Value) (str string, err error) {
	aa := reflect.TypeOf((*rawValue).Interface())
	vv := reflect.ValueOf((*rawValue).Interface())
	switch aa.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		str = strconv.FormatInt(vv.Int(), 10)
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		str = strconv.FormatUint(vv.Uint(), 10)
	case reflect.Float32, reflect.Float64:
		str = strconv.FormatFloat(vv.Float(), 'f', -1, 64)
	case reflect.String:
		str = vv.String()
	case reflect.Array, reflect.Slice:
		switch aa.Elem().Kind() {
		case reflect.Uint8:
			data := rawValue.Interface().([]byte)
			str = string(data)
		default:
			err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
		}
	//时间类型
	case reflect.Struct:
		if aa == core.TimeType {
			str = rawValue.Interface().(time.Time).Format(time.RFC3339Nano)
		} else {
			err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
		}
	case reflect.Bool:
		str = strconv.FormatBool(vv.Bool())
	case reflect.Complex128, reflect.Complex64:
		str = fmt.Sprintf("%v", vv.Complex())
	/* TODO: unsupported types below
	   case reflect.Map:
	   case reflect.Ptr:
	   case reflect.Uintptr:
	   case reflect.UnsafePointer:
	   case reflect.Chan, reflect.Func, reflect.Interface:
	*/
	default:
		err = fmt.Errorf("Unsupported struct type %v", vv.Type().Name())
	}
	return
}

func value2Bytes(rawValue *reflect.Value) (data []byte, err error) {
	var str string
	str, err = reflect2value(rawValue)
	if err != nil {
		return
	}
	data = []byte(str)
	return
}

func value2String(rawValue *reflect.Value) (data string, err error) {
	data, err = reflect2value(rawValue)
	if err != nil {
		return
	}
	return
}

func rows2Strings(rows *core.Rows) (resultsSlice []map[string]string, err error) {
	fields, err := rows.Columns()
	if err != nil {
		return nil, err
	}
	for rows.Next() {
		result, err := row2mapStr(rows, fields)
		if err != nil {
			return nil, err
		}
		resultsSlice = append(resultsSlice, result)
	}

	return resultsSlice, nil
}

func rows2maps(rows *core.Rows) (resultsSlice []map[string][]byte, err error) {
	fields, err := rows.Columns()
	if err != nil {
		return nil, err
	}
	for rows.Next() {
		result, err := row2map(rows, fields)
		if err != nil {
			return nil, err
		}
		resultsSlice = append(resultsSlice, result)
	}

	return resultsSlice, nil
}