package handler

import (
	"net/http"
	"strconv"

	"chis_osi/osi"
)

// PublicHandler 暴露 OSI 公开查询类 HTTP 入口。
type PublicHandler struct {
	client *osi.Client
}

func NewPublicHandler(client *osi.Client) *PublicHandler {
	return &PublicHandler{client: client}
}

// GridAddresses 处理 GET /api/dictionaries/grid-addresses?parentCode=..&pageNo=..&operateUser=..
func (h *PublicHandler) GridAddresses(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
		return
	}
	q := r.URL.Query()
	pageNo, ok := parseOptionalInt(w, q.Get("pageNo"), "pageNo")
	if !ok {
		return
	}
	_, result, err := h.client.QueryGridAddress(r.Context(), osi.GridAddressQuery{
		ParentCode:  q.Get("parentCode"),
		PageNo:      pageNo,
		OperateUser: q.Get("operateUser"),
	})
	writeRawOrError(w, result, err)
}

// Doctors 处理 GET /api/dictionaries/doctors?manaUnitId=..&operateUser=..
func (h *PublicHandler) Doctors(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
		return
	}
	q := r.URL.Query()
	_, result, err := h.client.QueryDoctors(r.Context(), osi.DoctorQuery{
		ManaUnitID:  q.Get("manaUnitId"),
		OperateUser: q.Get("operateUser"),
	})
	writeRawOrError(w, result, err)
}

// Drugs 处理 GET /api/dictionaries/drugs?ypmc=..&pym=..&pageNo=..
func (h *PublicHandler) Drugs(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
		return
	}
	q := r.URL.Query()
	pageNo, ok := parseRequiredInt(w, q.Get("pageNo"), "pageNo") // docx: 药品目录是分页查询，pageNo 必填
	if !ok {
		return
	}
	pageSize, ok := parseOptionalInt(w, q.Get("pageSize"), "pageSize")
	if !ok {
		return
	}
	_, result, err := h.client.QueryDrugs(r.Context(), osi.DrugQuery{
		PageNo:   pageNo,
		PageSize: pageSize,
		YPMC:     q.Get("ypmc"),
		PYM:      q.Get("pym"),
	})
	writeRawOrError(w, result, err)
}

// Orgs 处理 GET /api/dictionaries/orgs?organizCode=..&parentId=..
func (h *PublicHandler) Orgs(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
		return
	}
	q := r.URL.Query()
	_, result, err := h.client.QueryOrgs(r.Context(), osi.OrgQuery{
		OrganizCode: q.Get("organizCode"),
		ParentID:    q.Get("parentId"),
	})
	writeRawOrError(w, result, err)
}

func parseRequiredInt(w http.ResponseWriter, raw string, name string) (int, bool) {
	if raw == "" {
		writeJSONError(w, http.StatusBadRequest, name+" is required")
		return 0, false
	}
	return parseOptionalInt(w, raw, name)
}

func parseOptionalInt(w http.ResponseWriter, raw string, name string) (int, bool) {
	if raw == "" {
		return 0, true
	}
	value, err := strconv.Atoi(raw)
	if err != nil {
		writeJSONError(w, http.StatusBadRequest, name+" must be an integer")
		return 0, false
	}
	return value, true
}