package api

import (
	"SciencesServer/config"
	"SciencesServer/serve/logger"
	"SciencesServer/utils"
	"errors"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
)

const (
	SuccessCode = 200 //成功的状态码
	FailureCode = 999 //失败的状态码
)

type response struct {
	Code    int         `json:"code"`
	Message string      `json:"message"`
	Data    interface{} `json:"data"`
}

type ApiHandle func(c *gin.Context) interface{}

func GetSession() ApiHandle {
	return func(c *gin.Context) interface{} {
		value, _ := c.Get(config.TokenForSession)
		return value
	}
}

func GetTenantID() ApiHandle {
	return func(c *gin.Context) interface{} {
		value := c.GetHeader(config.ContentForTenantID)

		if value == "" {
			// 登录身份
			return uint64(1)
		}
		return utils.StringToUnit64(value)
	}
}

func Bind(req interface{}) ApiHandle {
	return func(c *gin.Context) interface{} {
		var err error

		if c.Request.Method == "GET" {
			err = c.ShouldBindQuery(req)
		} else {
			err = c.ShouldBindBodyWith(req, binding.JSON)
		}
		if err != nil {
			logger.ErrorF("Request URL【%s】Params Bind Error：%v", c.Request.URL, err)
			return errors.New("参数异常/缺失【" + err.Error() + "】")
		}
		c.Set("params", utils.AnyToJSON(req))
		return nil
	}
}

func APISuccess(data ...interface{}) ApiHandle {
	return func(c *gin.Context) interface{} {
		resp := &response{
			Code:    SuccessCode,
			Message: "ok",
		}
		if len(data) > 0 {
			resp.Data = data[0]
		}
		c.JSON(http.StatusOK, resp)
		return nil
	}
}

func APIFailure(err error) ApiHandle {
	return func(c *gin.Context) interface{} {
		resp := &response{
			Code:    FailureCode,
			Message: "failure",
		}
		if err != nil {
			resp.Message = err.Error()
		}
		c.JSON(http.StatusOK, resp)
		c.Abort()
		return nil
	}
}

func APIResponse(err error, data ...interface{}) ApiHandle {
	return func(c *gin.Context) interface{} {
		resp := &response{
			Code:    SuccessCode,
			Message: "ok",
		}
		if err != nil {
			resp.Code = FailureCode
			resp.Message = err.Error()
			c.JSON(http.StatusOK, resp)
			c.Abort()
			return nil
		}
		if len(data) > 0 {
			resp.Data = data[0]
		}
		c.JSON(http.StatusOK, resp)
		return nil
	}
}