import { randomUUID } from "node:crypto";
import { content } from "@deadhead/content";
import { createGuestResponseSchema, playerStateSchema, type PlayerState } from "@deadhead/schema";
import {
  boardPeriodIndex,
  boardPeriodMs,
  createDispatchRecord,
  createRepositionRecord,
  type Contract,
  type DispatchRecord,
} from "@deadhead/sim";
import { eq } from "drizzle-orm";
import { afterEach, beforeEach } from "vitest";
import { buildApp } from "../src/app";
import { createRecordingQueue } from "../src/jobs/queue";
import type { Database, Db } from "../src/db/client";
import { contractBoards, dispatches, pilots, players, ships } from "../src/db/schema";
import { makeOwner, TEST_NOW } from "./db";
import { testConfig } from "./helpers";

/** A clock tests can move. Starts at `TEST_NOW`. */
export class TestClock {
  now = TEST_NOW;
  read = () => this.now;
  advance(ms: number) {
    this.now += ms;
  }
}

export interface TestApp {
  app: ReturnType<typeof buildApp>;
  clock: TestClock;
  /** Jobs the app scheduled; tests run their handlers directly. */
  jobs: ReturnType<typeof createRecordingQueue>;
}

/** A fresh app per test on the shared test database, with a controllable clock. */
export function useTestApp(database: () => Database): () => TestApp {
  let current: TestApp | undefined;
  beforeEach(() => {
    const clock = new TestClock();
    const jobs = createRecordingQueue();
    current = {
      app: buildApp(testConfig(), { database: database(), clock: clock.read, jobs }),
      clock,
      jobs,
    };
  });
  afterEach(() => current?.app.close());
  return () => current!;
}

function cookieFrom(setCookie: string | string[] | undefined): string {
  const values = Array.isArray(setCookie) ? setCookie : setCookie ? [setCookie] : [];
  return values.map((c) => c.split(";")[0]).join("; ");
}

export interface Guest {
  cookie: string;
  playerId: string;
  avatarId: string;
}

/** Signs up a guest through the API (a tutorial player) and returns its session. */
export async function signUp(app: TestApp["app"]): Promise<Guest> {
  const response = await app.inject({ method: "POST", url: "/api/guest" });
  const body = createGuestResponseSchema.parse(response.json());
  return {
    cookie: cookieFrom(response.headers["set-cookie"]),
    playerId: body.playerId,
    avatarId: body.state.pilots[0]!.id,
  };
}

/** Calls an endpoint as a guest. */
export async function call(
  app: TestApp["app"],
  guest: Guest,
  method: "GET" | "POST",
  url: string,
  payload?: object,
) {
  return app.inject({
    method,
    url,
    headers: { cookie: guest.cookie },
    ...(payload ? { payload } : {}),
  });
}

export async function getState(app: TestApp["app"], guest: Guest): Promise<PlayerState> {
  const response = await call(app, guest, "GET", "/api/state");
  if (response.statusCode !== 200) throw new Error(`state failed: ${response.body}`);
  return playerStateSchema.parse(response.json());
}

export function testContract(overrides: Partial<Contract> = {}): Contract {
  return {
    id: `test:${randomUUID()}`,
    originId: "earth",
    destinationId: "moon",
    cargoTypeId: "standard",
    tier: 0,
    massTonnes: 10,
    payout: 2000,
    requiredSkill: null,
    requiredLongHaulLevel: 0,
    offeredAt: TEST_NOW,
    // Contracts expire at the end of their board period (TEST_NOW is a period start).
    expiresAt: TEST_NOW + boardPeriodMs(content.config),
    firstContact: false,
    ...overrides,
  };
}

/**
 * Puts an in-flight dispatch straight into the database, as if it had been
 * dispatched at `departAt`: the ship and pilot are marked in flight.
 */
export async function insertDispatch(
  db: Db,
  args: {
    playerId: string;
    shipId: string;
    pilotId: string;
    departAt: number;
    contract?: Contract | null;
    destinationId?: string;
  },
): Promise<DispatchRecord> {
  const [player] = await db.select().from(players).where(eq(players.id, args.playerId));
  const [ship] = await db.select().from(ships).where(eq(ships.id, args.shipId));
  const [pilot] = await db.select().from(pilots).where(eq(pilots.id, args.pilotId));
  const shipState = {
    id: ship!.id,
    modelId: ship!.modelId,
    locationId: ship!.locationId!,
    inFlight: false,
  };
  const pilotState = {
    id: pilot!.id,
    isAvatar: pilot!.isAvatar,
    assignedShipId: pilot!.assignedShipId,
    inFlight: false,
    skills: pilot!.skills,
    restEndsAt: null,
  };
  const id = randomUUID();
  const contract = args.contract === undefined ? testContract() : args.contract;
  const record = contract
    ? createDispatchRecord(
        {
          id,
          ship: shipState,
          pilot: pilotState,
          contract,
          tutorial: false,
          now: args.departAt,
          worldSeed: player!.worldSeed,
        },
        content,
      )
    : createRepositionRecord(
        {
          id,
          ship: shipState,
          pilot: pilotState,
          destinationId: args.destinationId!,
          now: args.departAt,
          worldSeed: player!.worldSeed,
        },
        content,
      );

  await db.insert(dispatches).values({
    id,
    playerId: args.playerId,
    shipId: ship!.id,
    pilotId: pilot!.id,
    tutorial: false,
    record,
    arrivalAt: record.arrivalAt,
  });
  await db
    .update(ships)
    .set({ status: "in_flight", locationId: null })
    .where(eq(ships.id, ship!.id));
  await db.update(pilots).set({ status: "in_flight" }).where(eq(pilots.id, pilot!.id));
  return record;
}

/** Stores a hand-made location board (Earth by default) for the period containing `now`. */
export async function putBoard(
  db: Db,
  playerId: string,
  contracts: Contract[],
  now = TEST_NOW,
  locationId = "earth",
) {
  await db.insert(contractBoards).values({
    id: randomUUID(),
    playerId,
    kind: "location",
    locationId,
    periodIndex: boardPeriodIndex(now, content.config),
    contracts,
    createdAt: now,
  });
}

/** Signs up a guest and turns them into an owner: tutorial over, a Courier at Earth crewed by the avatar, an Earth bay. */
export async function signUpOwner(
  app: TestApp["app"],
  db: Db,
): Promise<Guest & { shipId: string; earthBayId: string }> {
  const guest = await signUp(app);
  return { ...guest, ...(await makeOwner(db, guest.playerId, guest.avatarId)) };
}