import { getPayload, Payload } from "payload";
import config from "@/payload.config";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { applyZonePressure, computeZoneState, PRESSURE_OUTCOME_DELTAS } from "@/lib/operations/territory";

let payload: Payload;
const RUN = `terr-${Date.now().toString(36)}`;
const DAY = 86_400_000;

// ---------------------------------------------------------------------------
// Fixture tracking for cleanup
// ---------------------------------------------------------------------------
const syncEventIds: number[] = [];
const opEventIds: number[] = [];
const opEffectIds: number[] = [];
const zoneIds: number[] = [];
const pressureRowIds: number[] = [];
const userIds: number[] = [];
let factionId: number;
let mapId: number;
let serverId: number;
let zoneAId: number;
let zoneBId: number;
let zoneCId: number;

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
/** Full hook chain: raw op.end sync event -> validated event -> effect ->
 *  settlement (handleOperationEnd) -> one attributed pressure delta. */
async function endOperation(label: string, outcome: string, zoneId: number): Promise<number> {
  const sync = await payload.create({
    collection: "arma-sync-events",
    data: {
      eventId: `${RUN}-${label}`,
      server: serverId,
      type: "operation.end",
      occurredAt: new Date().toISOString(),
      payload: { operationId: RUN, version: 1, outcome, zoneId, factionId, actorId: userIds[0] },
    },
    overrideAccess: true,
    depth: 0,
  });
  syncEventIds.push(sync.id);

  const events = await payload.find({
    collection: "operation-events",
    where: { sourceEvent: { equals: sync.id } },
    limit: 1,
    depth: 0,
    overrideAccess: true,
  });
  expect(events.docs).toHaveLength(1);
  opEventIds.push(events.docs[0].id);

  const effects = await payload.find({
    collection: "operation-effects",
    where: { operationEvent: { equals: events.docs[0].id } },
    limit: 1,
    depth: 0,
    overrideAccess: true,
  });
  expect(effects.docs).toHaveLength(1);
  opEffectIds.push(effects.docs[0].id);
  return effects.docs[0].id;
}

async function pressureRowCount(zoneId: number): Promise<number> {
  const rows = await payload.find({
    collection: "zone-pressure",
    where: { zone: { equals: zoneId } },
    limit: 100,
    depth: 0,
    overrideAccess: true,
  });
  return rows.docs.length;
}

// ---------------------------------------------------------------------------
// Setup / teardown
// ---------------------------------------------------------------------------
beforeAll(async () => {
  const payloadConfig = await config;
  payload = await getPayload({ config: payloadConfig });

  const actor = await payload.create({
    collection: "users",
    data: {
      username: `${RUN}-actor`,
      discordUsername: `${RUN}-actor-discord`,
      displayName: `${RUN} Actor`,
      steamId: `${RUN}-steam-actor`,
      password: "Test1234",
    },
    overrideAccess: true,
    depth: 0,
  });
  userIds.push(actor.id);

  const faction = await payload.create({
    collection: "factions",
    data: { name: `${RUN} Hostiles`, type: "majorFaction" },
    overrideAccess: true,
    depth: 0,
  });
  factionId = faction.id;

  const server = await payload.create({
    collection: "game-servers",
    data: { serverId: `${RUN}-srv`, name: `${RUN} Server`, status: "online" },
    overrideAccess: true,
    depth: 0,
  });
  serverId = server.id;

  const map = await payload.create({
    collection: "maps",
    data: { name: `${RUN} Map`, worldSizeWidth: 8192, worldSizeHeight: 8192, basemapMode: "image" },
    overrideAccess: true,
    depth: 0,
  });
  mapId = map.id;

  for (const label of ["alpha", "bravo", "charlie"] as const) {
    const zone = await payload.create({
      collection: "map-zones",
      data: {
        name: `${RUN} Zone ${label.toUpperCase()}`,
        map: mapId,
        type: "territory",
        points: [
          [0, 0],
          [100, 0],
          [100, 100],
          [0, 100],
        ],
      },
      overrideAccess: true,
      depth: 0,
    });
    zoneIds.push(zone.id);
    if (label === "alpha") zoneAId = zone.id;
    if (label === "bravo") zoneBId = zone.id;
    if (label === "charlie") zoneCId = zone.id;
  }
});

afterAll(async () => {
  if (!payload) return;
  const pressureRows = await payload.find({
    collection: "zone-pressure",
    where: { operationId: { equals: RUN } },
    limit: 100,
    depth: 0,
    overrideAccess: true,
  });
  for (const row of pressureRows.docs) {
    await payload.delete({ collection: "zone-pressure", id: row.id, overrideAccess: true }).catch(() => {});
  }
  for (const id of opEffectIds) {
    await payload.delete({ collection: "operation-effects", id, overrideAccess: true }).catch(() => {});
  }
  for (const id of opEventIds) {
    await payload.delete({ collection: "operation-events", id, overrideAccess: true }).catch(() => {});
  }
  for (const id of syncEventIds) {
    await payload.delete({ collection: "arma-sync-events", id, overrideAccess: true }).catch(() => {});
  }
  for (const id of zoneIds) {
    await payload.delete({ collection: "map-zones", id, overrideAccess: true }).catch(() => {});
  }
  await payload.delete({ collection: "maps", id: mapId, overrideAccess: true }).catch(() => {});
  await payload.delete({ collection: "factions", id: factionId, overrideAccess: true }).catch(() => {});
  await payload.delete({ collection: "game-servers", id: serverId, overrideAccess: true }).catch(() => {});
  for (const id of userIds) {
    await payload.delete({ collection: "users", id, overrideAccess: true }).catch(() => {});
  }
});

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------
describe("Zone pressure (task 7)", () => {
  it("applies hostile pressure once for a failed operation and replays as a no-op", async () => {
    const effectId = await endOperation("fail-1", "failed", zoneAId);

    const state = await computeZoneState(payload, zoneAId);
    expect(state.pressure).toBe(PRESSURE_OUTCOME_DELTAS.failure);
    expect(state.state).toBe("contested");
    expect(state.routeRiskMultiplier).toBe(1.25);
    expect(state.yieldMultiplier).toBe(0.9);
    expect(state.activeRows).toBe(1);

    const replay = await applyZonePressure(payload, {
      zoneId: zoneAId,
      factionId,
      operationId: RUN,
      sourceEffectId: effectId,
      delta: PRESSURE_OUTCOME_DELTAS.failure,
    });
    expect(replay.created).toBe(false);
    expect(await pressureRowCount(zoneAId)).toBe(1);
  });

  it("walks the full arc: contested after failure, recovering after a successful push", async () => {
    await endOperation("fail-b", "failed", zoneBId);
    const contested = await computeZoneState(payload, zoneBId);
    expect(contested.state).toBe("contested");

    await endOperation("success-b", "success", zoneBId);
    const recovering = await computeZoneState(payload, zoneBId);
    expect(recovering.pressure).toBe(15);
    expect(recovering.state).toBe("recovering");
    expect(recovering.routeRiskMultiplier).toBe(1);
    expect(recovering.yieldMultiplier).toBe(1);
  });

  it("reaches hostile control at the documented threshold", async () => {
    await endOperation("fail-2", "failed", zoneAId);
    const controlled = await computeZoneState(payload, zoneAId);
    expect(controlled.pressure).toBe(80);
    expect(controlled.state).toBe("controlled");
    expect(controlled.routeRiskMultiplier).toBe(1.5);
    expect(controlled.yieldMultiplier).toBe(0.75);
  });

  it("decays deterministically, halving per elapsed period", async () => {
    const now = Date.now();
    const plusOnePeriod = await computeZoneState(payload, zoneAId, new Date(now + 7 * DAY + 3_600_000));
    expect(plusOnePeriod.pressure).toBe(40);
    expect(plusOnePeriod.state).toBe("contested");

    const plusTwoPeriods = await computeZoneState(payload, zoneAId, new Date(now + 14 * DAY + 3_600_000));
    expect(plusTwoPeriods.pressure).toBe(20);
    expect(plusTwoPeriods.state).toBe("recovering");

    const plusTenPeriods = await computeZoneState(payload, zoneAId, new Date(now + 70 * DAY + 3_600_000));
    expect(plusTenPeriods.pressure).toBeLessThan(1);
    expect(plusTenPeriods.state).toBe("neutral");
  });

  it("never touches zones the operation did not declare", async () => {
    const untouched = await computeZoneState(payload, zoneCId);
    expect(untouched.pressure).toBe(0);
    expect(untouched.state).toBe("neutral");
    expect(untouched.activeRows).toBe(0);
    expect(await pressureRowCount(zoneCId)).toBe(0);
  });

  it("keeps placement semantics independent of pressure (pure helpers only)", () => {
    // Placement rules live in src/lib/map/placement.ts (terrain + resources),
    // which pressure never imports or mutates. This assertion documents the
    // boundary: state thresholds are the ONLY pressure inputs to downstream
    // multipliers.
    expect(PRESSURE_OUTCOME_DELTAS.failure).toBe(40);
    expect(PRESSURE_OUTCOME_DELTAS.success).toBe(-25);
  });
});