"use client";

/**
 * Workspace-level queries/mutations (TanStack Query owns server state).
 */
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { workspaceApi } from "@/lib/api";
import type { Workspace, WorkspaceRole } from "@/lib/types";

export function useWorkspaces() {
  return useQuery({
    queryKey: ["workspaces"],
    queryFn: () => workspaceApi.list()
  });
}

/**
 * Load a workspace by id or slug (the [workspace] route param accepts both).
 *
 * The magic alias `default` (the middleware + post-login redirect target) is
 * a routing placeholder, NOT a workspace id/slug — no workspace has it, so
 * `GET /workspaces/default` always 404s. The `[workspace]` index page owns
 * resolving it (list → first workspace → redirect); the hook must NOT fire
 * the doomed fetch or the layout's error gate (`isError`) blanks the whole
 * shell (content + menu) before the page can resolve the alias. A disabled
 * query reports neither data nor error, so `isError` stays false.
 */
export function useWorkspace(slugOrId: string) {
  return useQuery({
    queryKey: ["workspaces", slugOrId],
    queryFn: () => workspaceApi.get(slugOrId),
    enabled: slugOrId.length > 0 && slugOrId !== "default"
  });
}

export function useWorkspaceMembers(workspaceId: string) {
  return useQuery({
    queryKey: ["workspaces", workspaceId, "members"],
    queryFn: () => workspaceApi.members(workspaceId),
    enabled: workspaceId.length > 0
  });
}

export function useCreateWorkspace() {
  const qc = useQueryClient();
  return useMutation({
    mutationFn: (input: { name: string; emoji?: string }) => workspaceApi.create(input.name, input.emoji),
    onSuccess: () => qc.invalidateQueries({ queryKey: ["workspaces"] })
  });
}

export function useUpdateWorkspace(workspaceId: string) {
  const qc = useQueryClient();
  return useMutation({
    mutationFn: (patch: Partial<Pick<Workspace, "name" | "emoji">>) => workspaceApi.update(workspaceId, patch),
    onSuccess: (ws) => {
      qc.setQueryData(["workspaces", ws.id], ws);
      qc.invalidateQueries({ queryKey: ["workspaces"] });
    }
  });
}

export function useInviteMember(workspaceId: string) {
  const qc = useQueryClient();
  return useMutation({
    mutationFn: (input: { email: string; role: WorkspaceRole }) => workspaceApi.invite(workspaceId, input.email, input.role),
    onSuccess: () => qc.invalidateQueries({ queryKey: ["workspaces", workspaceId, "invites"] })
  });
}