package structx

import (
	"reflect"
	"sync"
)

// ChangeInfo 变更信息
type ChangeInfo struct {
	Old string `json:"old"`
	New string `json:"new"`
	Val any    `json:"val"`
}

// FieldInfo 字段信息
type FieldInfo struct {
	Index     []int
	Name      string
	IsPtr     bool
	FieldType reflect.Type
	IsSlice   bool
	IsArray   bool
}

// converterFunc 类型转换函数
type converterFunc func(reflect.Value, string) (interface{}, error)

var (
	typeConverters = map[reflect.Kind]converterFunc{
		reflect.Bool:    convertBool,
		reflect.Int:     convertInt[int],
		reflect.Int8:    convertInt[int8],
		reflect.Int16:   convertInt[int16],
		reflect.Int32:   convertInt[int32],
		reflect.Int64:   convertInt[int64],
		reflect.Uint:    convertUint[uint],
		reflect.Uint8:   convertUint[uint8],
		reflect.Uint16:  convertUint[uint16],
		reflect.Uint32:  convertUint[uint32],
		reflect.Uint64:  convertUint[uint64],
		reflect.Float32: convertFloat[float32],
		reflect.Float64: convertFloat[float64],
		reflect.String:  convertString,
		reflect.Slice:   convertSlice,
		reflect.Array:   convertArray,
		reflect.Map:     convertMap,
	}

	typeInfoCache = make(map[reflect.Type]map[string]FieldInfo)
	cacheMutex    = &sync.RWMutex{}

	basicStructTypes = map[string]bool{
		"time.Time":                             true,
		"github.com/shopspring/decimal.Decimal": true,
		"sql.NullString":                        true,
		"sql.NullInt64":                         true,
		"sql.NullBool":                          true,
		"sql.NullFloat64":                       true,
	}

	basicKinds = map[reflect.Kind]bool{
		reflect.String:  true,
		reflect.Int:     true,
		reflect.Int8:    true,
		reflect.Int16:   true,
		reflect.Int32:   true,
		reflect.Int64:   true,
		reflect.Uint:    true,
		reflect.Uint8:   true,
		reflect.Uint16:  true,
		reflect.Uint32:  true,
		reflect.Uint64:  true,
		reflect.Float32: true,
		reflect.Float64: true,
		reflect.Bool:    true,
	}
)