package shop.alien.entity.result;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.ToString;
import org.springframework.lang.Nullable;
import org.springframework.util.ObjectUtils;

import java.io.Serializable;
import java.util.Optional;

/**
 * 统一API响应结果封装
 *
 * @author ssk
 */
@Getter
@Setter
@ToString
@NoArgsConstructor
@ApiModel
public class R<T> implements Serializable {

    private static final long serialVersionUID = 1L;

    private int code;
    private boolean success;
    @ApiModelProperty(value = "对象")
    private T data;
    private String msg;

    private R(IResultCode resultCode) {
        this(resultCode, null, resultCode.getMessage());
    }

    private R(IResultCode resultCode, String msg) {
        this(resultCode, null, msg);
    }

    private R(IResultCode resultCode, T data) {
        this(resultCode, data, resultCode.getMessage());
    }

    private R(IResultCode resultCode, T data, String msg) {
        this(resultCode.getCode(), data, msg);
    }

    private R(int code, T data, String msg) {
        this.code = code;
        this.data = data;
        this.msg = msg;
        this.success = ResultCode.SUCCESS.code == code;
    }

    /**
     * 判断返回是否为成功
     *
     * @param result Result
     * @return 是否成功
     */
    public static boolean isSuccess(@Nullable R<?> result) {
        return Optional.ofNullable(result)
                .map(x -> ObjectUtils.nullSafeEquals(ResultCode.SUCCESS.code, x.code))
                .orElse(Boolean.FALSE);
    }

    /**
     * 判断返回是否为成功
     *
     * @param result Result
     * @return 是否成功
     */
    public static boolean isNotSuccess(@Nullable R<?> result) {
        return !R.isSuccess(result);
    }

    /**
     * 返回R
     *
     * @param data 数据
     * @param <T>  T 泛型标记
     * @return R
     */
    public static <T> R<T> data(T data) {
        return data(data, APPConstant.DEFAULT_SUCCESS_MESSAGE);
    }

    /**
     * 返回R
     *
     * @param data 数据
     * @param msg  消息
     * @param <T>  T 泛型标记
     * @return R
     */
    public static <T> R<T> data(T data, String msg) {
        return data(APPConstant.SC_OK, data, msg);
    }

    /**
     * 返回R
     *
     * @param code 状态码
     * @param data 数据
     * @param msg  消息
     * @param <T>  T 泛型标记
     * @return R
     */
    public static <T> R<T> data(int code, T data, String msg) {
        return new R<>(code, data, data == null ? APPConstant.DEFAULT_NULL_MESSAGE : msg);
    }

    /**
     * 返回R
     *
     * @param msg 消息
     * @param <T> T 泛型标记
     * @return R
     */
    public static <T> R<T> success(String msg) {
        return new R<>(ResultCode.SUCCESS, msg);
    }

    /**
     * 返回R
     *
     * @param resultCode 业务代码
     * @param <T>        T 泛型标记
     * @return R
     */
    public static <T> R<T> success(IResultCode resultCode) {
        return new R<>(resultCode);
    }

    /**
     * 返回R
     *
     * @param resultCode 业务代码
     * @param msg        消息
     * @param <T>        T 泛型标记
     * @return R
     */
    public static <T> R<T> success(IResultCode resultCode, String msg) {
        return new R<>(resultCode, msg);
    }

    /**
     * 返回R
     *
     * @param msg 消息
     * @param <T> T 泛型标记
     * @return R
     */
    public static <T> R<T> fail(String msg) {
        return new R<>(ResultCode.FAILURE, msg);
    }


    /**
     * 返回R
     *
     * @param code 状态码
     * @param msg  消息
     * @param <T>  T 泛型标记
     * @return R
     */
    public static <T> R<T> fail(int code, String msg) {
        return new R<>(code, null, msg);
    }

    /**
     * 返回R
     *
     * @param resultCode 业务代码
     * @param <T>        T 泛型标记
     * @return R
     */
    public static <T> R<T> fail(IResultCode resultCode) {
        return new R<>(resultCode);
    }

    /**
     * 返回R
     *
     * @param resultCode 业务代码
     * @param msg        消息
     * @param <T>        T 泛型标记
     * @return R
     */
    public static <T> R<T> fail(IResultCode resultCode, String msg) {
        return new R<>(resultCode, msg);
    }

    /**
     * 返回R
     *
     * @param flag 成功状态
     * @return R
     */
    public static <T> R<T> status(boolean flag) {
        return flag ? success(APPConstant.DEFAULT_SUCCESS_MESSAGE) : fail(APPConstant.DEFAULT_FAILURE_MESSAGE);
    }

}
