package conv

import (
	"encoding/json"
	"fmt"
	"reflect"
	"strconv"
)

// AnyToString 将任意值转为可读的字符串：nil 为空串；标量与 []byte 用 strconv；指针会解引用；其余走 fmt.Sprint。
func AnyToString(in any) string {
	for in != nil {
		rv := reflect.ValueOf(in)
		if rv.Kind() != reflect.Ptr {
			break
		}
		if rv.IsNil() {
			return ""
		}
		in = rv.Elem().Interface()
	}
	if in == nil {
		return ""
	}

	switch v := in.(type) {
	case string:
		return v
	case []byte:
		return string(v)
	case bool:
		return strconv.FormatBool(v)
	case int:
		return strconv.Itoa(v)
	case int8:
		return strconv.FormatInt(int64(v), 10)
	case int16:
		return strconv.FormatInt(int64(v), 10)
	case int32:
		return strconv.FormatInt(int64(v), 10)
	case int64:
		return strconv.FormatInt(v, 10)
	case uint:
		return strconv.FormatUint(uint64(v), 10)
	case uint8:
		return strconv.FormatUint(uint64(v), 10)
	case uint16:
		return strconv.FormatUint(uint64(v), 10)
	case uint32:
		return strconv.FormatUint(uint64(v), 10)
	case uint64:
		return strconv.FormatUint(v, 10)
	case float32:
		return strconv.FormatFloat(float64(v), 'f', -1, 32)
	case float64:
		return strconv.FormatFloat(v, 'f', -1, 64)
	case json.Number:
		return string(v)
	default:
		if s, ok := in.(fmt.Stringer); ok {
			return s.String()
		}
		return fmt.Sprint(in)
	}
}

// AnyToInt 将动态类型转为 int（两仓库 internal 中逻辑一致，此处合并分支）。
func AnyToInt(v any) int {
	switch val := v.(type) {
	case int:
		return val
	case int8:
		return int(val)
	case int16:
		return int(val)
	case int32:
		return int(val)
	case int64:
		return int(val)
	case uint, uint8, uint16, uint32, uint64:
		return int(reflect.ValueOf(val).Uint())
	case float32:
		return int(val)
	case float64:
		return int(val)
	case string:
		i, err := strconv.Atoi(val)
		if err != nil {
			return 0
		}
		return i
	default:
		return 0
	}
}

// AnyToFloat64 将动态类型转为 float64（合并 stock 对 int/uint 等分支与 gostock 的 string 分支）。
func AnyToFloat64(v any) float64 {
	switch val := v.(type) {
	case float64:
		return val
	case float32:
		return float64(val)
	case int:
		return float64(val)
	case int8:
		return float64(val)
	case int16:
		return float64(val)
	case int32:
		return float64(val)
	case int64:
		return float64(val)
	case uint:
		return float64(val)
	case uint8:
		return float64(val)
	case uint16:
		return float64(val)
	case uint32:
		return float64(val)
	case uint64:
		return float64(val)
	case string:
		return String2Float64(val)
	case json.Number:
		f, err := val.Float64()
		if err != nil {
			return 0
		}
		return f
	default:
		return 0
	}
}

// String2Float64 字符串转Float64
// floatStr: 小数点数字的字符串
// 返回: 转换后的64位浮点数，转换失败返回0
func String2Float64(floatStr string) (floatNum float64) {
	floatNum, err := strconv.ParseFloat(floatStr, 64)
	if err != nil {
		return 0
	}
	return
}