import { apiGet, apiPost, apiPatch, apiDelete } from "@/api/client";
import type { CanonicalMatch } from "@/api/canonicalSystems";

export interface System {
  id: number;
  project_id: number;
  name: string;
  /**
   * The global area this System is an instance of, or null. Null is a valid
   * resting state — a project-specific area should stay unmapped.
   */
  canonical_id: number | null;
  description: string;
  color: string | null;
  status: "active" | "archived";
  order_index: number;
  open_issue_count: number;
  created_at: string | null;
  updated_at: string | null;
}

export async function listSystems(projectId: number): Promise<System[]> {
  const data = await apiGet<{ systems: System[] }>(`/api/projects/${projectId}/systems`);
  return data.systems;
}

/**
 * A created System, plus the catalog's answer about its name. An `exact`
 * catalog hit is applied by the server and arrives as a populated
 * `canonical_id`; an `overlap` is only OFFERED, and comes back here for the
 * caller to accept or ignore.
 *
 * A same-named System in this project is a 409 ApiError carrying
 * `{duplicate, existing_id}` — the same gate the MCP door enforces (#2482).
 */
export interface CreatedSystem extends System {
  canonical_suggestion?: CanonicalMatch;
}

export async function createSystem(
  projectId: number,
  data: { name: string; description?: string; color?: string; canonical_id?: number },
): Promise<CreatedSystem> {
  return apiPost(`/api/projects/${projectId}/systems`, data);
}

export async function updateSystem(
  projectId: number,
  systemId: number,
  data: Partial<{
    name: string;
    description: string;
    color: string | null;
    status: "active" | "archived";
    order_index: number;
  }>,
): Promise<System> {
  return apiPatch(`/api/projects/${projectId}/systems/${systemId}`, data);
}

export async function deleteSystem(projectId: number, systemId: number): Promise<void> {
  return apiDelete(`/api/projects/${projectId}/systems/${systemId}`);
}

// Lightweight issue shape returned by the project-issues list endpoint.
export interface TaskLike {
  id: number;
  title: string;
  status: string;
  priority: string;
  systems?: System[];
  updated_at?: string | null;
}

export async function getProjectIssues(
  projectId: number,
  openOnly = true,
): Promise<TaskLike[]> {
  const data = await apiGet<{ issues: TaskLike[] }>(
    `/api/projects/${projectId}/issues?open_only=${openOnly}`,
  );
  return data.issues;
}