/** URL state of the project tracker — shared by the server page and the client filter bar (no "use client" here). */
export const PROJECT_VIEWS = ["table", "map", "timeline", "kanban"] as const;
export type ProjectView = (typeof PROJECT_VIEWS)[number];

export interface ProjectQuery {
  view?: ProjectView;
  status?: string;
  country?: string;
  operator?: string;
  min_mw?: number;
  ai?: boolean;
  /** project class (NEW_BUILD, EXPANSION, …), comma list */
  project_class?: string;
  expected_from?: number;
  expected_to?: number;
  q?: string;
  sort?: "updated" | "mw" | "announced" | "opening";
  order?: "asc" | "desc";
  page?: number;
}

export const PROJECT_SORTS: Array<{ v: NonNullable<ProjectQuery["sort"]>; label: string }> = [
  { v: "updated", label: "Last update" },
  { v: "mw", label: "Planned MW" },
  { v: "announced", label: "Announced" },
  { v: "opening", label: "Expected opening" },
];

/** Physical project classes (may create or move a project); associated classes are events, never projects. */
export const PROJECT_CLASS_OPTIONS: Array<{ v: string; label: string }> = [
  { v: "NEW_BUILD", label: "New build" },
  { v: "EXPANSION", label: "Expansion" },
  { v: "CONSTRUCTION_START", label: "Construction start" },
  { v: "PERMIT", label: "Permit" },
  { v: "LAND_ACQUISITION", label: "Land acquisition" },
  { v: "GRID_CONNECTION", label: "Grid connection" },
];

export function projectQueryString(q: ProjectQuery): string {
  const p = new URLSearchParams();
  if (q.view && q.view !== "table") p.set("view", q.view);
  if (q.q) p.set("q", q.q);
  if (q.status) p.set("status", q.status);
  if (q.country) p.set("country", q.country);
  if (q.operator) p.set("operator", q.operator);
  if (q.min_mw) p.set("min_mw", String(q.min_mw));
  if (q.ai) p.set("ai", "1");
  if (q.project_class) p.set("class", q.project_class);
  if (q.expected_from) p.set("expected_from", String(q.expected_from));
  if (q.expected_to) p.set("expected_to", String(q.expected_to));
  if (q.sort && q.sort !== "updated") p.set("sort", q.sort);
  if (q.order) p.set("order", q.order);
  if (q.page && q.page > 1) p.set("page", String(q.page));
  return p.toString();
}