import { expect, type Page } from '@playwright/test';

// Shared e2e helpers — kept out of the specs so both files can reuse them.

interface WorldSystemDto { id: number; name: string; x: number; y: number; discovered: boolean; current: boolean }
interface WorldState { systems: WorldSystemDto[]; edges: [number, number][]; turn: number }

// Minimal crew member — GET /api/crew is the {crew, tasks} object (Task 6 / JC-7); the full
// member shape lives in e2e/state.spec.ts.
interface CrewDto { id: number; role: string }

// The real TaskType strings (lib/game/tasks.ts) keyed by the action POST path — there is no
// bare SHIP type, ship actions split into UPGRADE / EXPAND / BUILD.
const TASK_TYPE: Record<string, string> = {
  '/api/jump': 'JUMP',
  '/api/explore': 'EXPLORE',
  '/api/research': 'RESEARCH',
  '/api/ship/upgrade': 'SHIP_UPGRADE',
  '/api/ship/expand': 'SHIP_EXPAND',
  '/api/ship/build': 'SHIP_BUILD',
};

// The GET endpoint that serves each action's final snapshot (the action paths are POST-only).
const FINAL_SNAPSHOT: Record<string, string> = {
  '/api/jump': '/api/world',
  '/api/explore': '/api/system',
  '/api/research': '/api/tech',
  '/api/ship/upgrade': '/api/ship',
  '/api/ship/expand': '/api/ship',
  '/api/ship/build': '/api/ship',
};

// Queue an action POST with a default one-person crew, then tick until that task resolves.
// The POST only queues (200, no turn bump, effect not yet visible); the effect appears once the
// task hits 0 on a tick — a task that starts ACTIVE with remaining N resolves on the Nth tick
// (lib/game/tasks.ts tickTurn) — so N (the full duration) is read from the queue response's
// tasks array and POST /api/turn is sent exactly N times. Returns the final snapshot for the
// path. A 409 on the queue POST is a busy / in-transit rejection (Task 3), not a tick-count bug.
export async function resolveAction(page: Page, path: string, data: Record<string, unknown>): Promise<unknown> {
  const roster = (await (await page.request.get('/api/crew')).json()) as { crew?: CrewDto[] } | CrewDto[];
  const members: CrewDto[] = Array.isArray(roster) ? roster : (roster.crew ?? []); // {crew, tasks} object (JC-7); the array guard keeps the helper shape-tolerant
  expect(members.length).toBeGreaterThan(0); // starting crew is always seeded
  const res = await page.request.post(path, { data: { ...data, leadCrewId: members[0].id, helperCrewIds: [] } });
  expect(res.status()).toBe(200);
  const snap = (await res.json()) as { tasks?: { type: string; remaining: number }[] };
  const n = snap.tasks?.find((t) => t.type === TASK_TYPE[path])?.remaining ?? 1;
  for (let i = 0; i < n; i++) expect((await page.request.post('/api/turn')).status()).toBe(200);
  return (await page.request.get(FINAL_SNAPSHOT[path])).json();
}

// Jump to an adjacent system, preferring one that is still undiscovered. Every jump into an
// undiscovered system generates 4 fresh neighbours (lib/game/world.ts), so fresh territory is
// always available — picking the FIRST edge instead ping-pongs between exhausted systems, because
// edges come back in insertion order and the oldest route out of a system is usually the one that
// led here. Falls back to any non-current adjacent system if none is undiscovered. The jump is
// queued with a default one-person crew and ticked to completion (resolveAction) before this
// returns, so the caller is already standing in the target system, not merely en route to it.
export async function jumpToFreshSystem(page: Page): Promise<WorldState> {
  const world = (await (await page.request.get('/api/world')).json()) as WorldState;
  const currentId = world.systems.find((s) => s.current)!.id;

  const adjacentIds = new Set<number>();
  for (const [a, b] of world.edges) {
    if (a === currentId) adjacentIds.add(b);
    else if (b === currentId) adjacentIds.add(a);
  }
  const candidates = [...adjacentIds].map((id) => world.systems.find((s) => s.id === id)!);
  const target = candidates.find((s) => !s.discovered) ?? candidates[0];
  expect(target).toBeDefined(); // every system has at least one route out (ring generation)

  const after = (await resolveAction(page, '/api/jump', { systemId: target.id })) as WorldState;
  expect(after.systems.find((s) => s.current)?.id).toBe(target.id); // landed, not just queued
  return after;
}

// Tick the save's task queue until it is empty (free skips are legal 200s; every tick decrements
// every ACTIVE row and PENDING rows auto-start, so a non-empty queue always shrinks — the bound
// only fails a pathological state). Every spec that queues actions starts from this on retry:
// the CI DB persists across attempts, and a failed one may have left a row behind — an in-transit
// JUMP would 409 every new queue (lib/game/tasks.ts's in-transit rule).
export async function drainQueue(page: Page): Promise<void> {
  for (let ticks = 0; ; ticks++) {
    const body = (await (await page.request.get('/api/crew')).json()) as { crew?: CrewDto[]; tasks?: { id: number }[] } | CrewDto[];
    const tasks = Array.isArray(body) ? [] : (body.tasks ?? []);
    if (tasks.length === 0) return;
    expect(ticks).toBeLessThan(60);
    expect((await page.request.post('/api/turn')).status()).toBe(200);
  }
}