package area

import (
	"encoding/json"
	"errors"
	"io"
	"net/http"
	"strconv"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/go-admin-team/go-admin-core/sdk/api"
	"github.com/go-admin-team/go-admin-core/sdk/pkg/jwtauth/user"
	coreService "github.com/go-admin-team/go-admin-core/sdk/service"
)

type API struct{ api.Api }

func (e *API) service(c *gin.Context) (*Service, error) {
	base := coreService.Service{}
	if err := e.MakeContext(c).MakeOrm().MakeService(&base).Errors; err != nil {
		return nil, err
	}
	return NewService(base.Orm), nil
}

func (e *API) List(c *gin.Context) {
	service, err := e.service(c)
	if err != nil {
		e.Error(http.StatusInternalServerError, err, "区域配置服务初始化失败")
		return
	}
	pageIndex, _ := strconv.Atoi(c.DefaultQuery("pageIndex", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
	items, total, err := service.List(c.Request.Context(), PageRequest{Keyword: c.Query("keyword"), Kind: c.Query("kind"), RecalibrationState: c.Query("recalibrationState"), PageIndex: pageIndex, PageSize: pageSize})
	if err != nil {
		e.writeError(err)
		return
	}
	e.PageOK(items, int(total), pageIndex, pageSize, "查询成功")
}

func (e *API) Create(c *gin.Context) {
	service, err := e.service(c)
	if err != nil {
		e.Error(http.StatusInternalServerError, err, "区域配置服务初始化失败")
		return
	}
	var request UpsertRequest
	if err = decodeJSON(c, &request); err != nil {
		e.Error(http.StatusBadRequest, err, "请求内容格式不正确")
		return
	}
	request.UpdateBy = user.GetUserId(c)
	item, err := service.Create(c.Request.Context(), request)
	if err != nil {
		e.writeError(err)
		return
	}
	e.OK(item, "区域配置已创建")
}

func (e *API) Update(c *gin.Context) {
	service, err := e.service(c)
	if err != nil {
		e.Error(http.StatusInternalServerError, err, "区域配置服务初始化失败")
		return
	}
	var request UpsertRequest
	if err = decodeJSON(c, &request); err != nil {
		e.Error(http.StatusBadRequest, err, "请求内容格式不正确")
		return
	}
	request.UpdateBy = user.GetUserId(c)
	item, err := service.Update(c.Request.Context(), c.Param("id"), request)
	if err != nil {
		e.writeError(err)
		return
	}
	e.OK(item, "已保存新版本")
}

func (e *API) Versions(c *gin.Context) {
	service, err := e.service(c)
	if err != nil {
		e.Error(http.StatusInternalServerError, err, "区域配置服务初始化失败")
		return
	}
	items, err := service.Versions(c.Request.Context(), c.Param("id"))
	if err != nil {
		e.writeError(err)
		return
	}
	e.OK(items, "查询成功")
}

func (e *API) writeError(err error) {
	switch {
	case errors.Is(err, ErrInvalidRequest), errors.Is(err, ErrInvalidGeometry):
		e.Error(http.StatusBadRequest, err, err.Error())
	case errors.Is(err, ErrNotFound), errors.Is(err, ErrProfileMissing):
		e.Error(http.StatusNotFound, err, err.Error())
	case errors.Is(err, ErrConflict):
		e.Error(http.StatusConflict, err, err.Error())
	default:
		e.Error(http.StatusInternalServerError, err, "区域配置操作失败")
	}
}

func decodeJSON(c *gin.Context, target any) error {
	if !strings.HasPrefix(strings.ToLower(strings.TrimSpace(c.GetHeader("Content-Type"))), "application/json") {
		return errors.New("content type must be application/json")
	}
	decoder := json.NewDecoder(http.MaxBytesReader(c.Writer, c.Request.Body, 64<<10))
	decoder.DisallowUnknownFields()
	if err := decoder.Decode(target); err != nil {
		return err
	}
	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
		if err == nil {
			return errors.New("request body must contain one JSON object")
		}
		return err
	}
	return nil
}