package admin

import (
	"net/http"
	"server/internal/middleware"
	"server/internal/model/common"
	"server/internal/model/request"
	"server/internal/pkg/errs"
	"server/internal/pkg/httputil"
	"server/internal/router"
	"server/internal/service/admin"

	"github.com/go-chi/chi/v5"
)

type UserHandler struct {
	userService *admin.UserService
}

// 编译期接口断言
var _ router.Registrar = (*UserHandler)(nil)

func NewUserHandler(userService *admin.UserService) *UserHandler {
	return &UserHandler{
		userService: userService,
	}
}

func (h *UserHandler) Register(r chi.Router) {
	r.Route("/users", func(r chi.Router) {
		r.Get("/", h.List)
		r.Get("/me", h.GetCurrentUser)
		r.Get("/{id}/roles", h.ListRoles)
		r.Post("/", h.Create)
		r.Patch("/{id}", h.Update)
		r.Put("/{id}/roles", h.SetRoles)
		r.Patch("/{id}/password", h.UpdatePassword)
		r.Delete("/{id}", h.Delete)
	})
}

func (h *UserHandler) GetCurrentUser(w http.ResponseWriter, r *http.Request) {
	claims, ok := middleware.GetClaims(r.Context())

	if !ok || claims.UserID == 0 {
		httputil.Fail(w, errs.ErrUnauthorized)
		return
	}

	isAdmin := middleware.IsAdmin(r.Context())
	uid := claims.UserID

	user, err := h.userService.GetCurrentUser(r.Context(), uid, isAdmin)
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w, user)
}

func (h *UserHandler) List(w http.ResponseWriter, r *http.Request) {
	pagination := httputil.Pagination(r)

	params := request.SearchUserParams{
		Pagination: *pagination,
		Username:   r.URL.Query().Get("username"),
	}

	result, err := h.userService.List(r.Context(), params)
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	resp := common.PageResponse{
		Page:     pagination.Page,
		PageSize: pagination.PageSize,
		List:     result.List,
		Total:    result.Total,
	}

	httputil.OkWithPage(w, &resp)
}

func (h *UserHandler) ListRoles(w http.ResponseWriter, r *http.Request) {
	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	list, err := h.userService.ListRoles(r.Context(), id)
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w, list)
}

func (h *UserHandler) Create(w http.ResponseWriter, r *http.Request) {
	var req request.CreateUserRequest

	if err := httputil.BindJson(r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	if err := h.userService.Create(r.Context(), req); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}

func (h *UserHandler) Update(w http.ResponseWriter, r *http.Request) {
	var req request.UpdateUserRequest

	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = httputil.BindJson(r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.userService.Update(r.Context(), id, req); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}

func (h *UserHandler) SetRoles(w http.ResponseWriter, r *http.Request) {
	var req request.SetUserRolesRequest

	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = httputil.BindJson(r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.userService.SetRoles(r.Context(), id, req); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)

}

func (h *UserHandler) UpdatePassword(w http.ResponseWriter, r *http.Request) {
	var req request.UpdateUserPassword

	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = httputil.BindJson(r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.userService.UpdatePassword(r.Context(), id, req); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}

func (h *UserHandler) Delete(w http.ResponseWriter, r *http.Request) {
	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.userService.Delete(r.Context(), id); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}