import test from 'node:test';
import assert from 'node:assert/strict';

import { KeyPair } from 'near-api-js';

import { createIntentRequestController } from '../src/core/intent-request-controller.mjs';
import {
  applySlippageBps,
  buildSolverQuoteRequest,
  computeBtcReceiveUnitsFromEure,
  normalizeSolverQuotes,
  parseDecimalToUnits,
  selectBestSolverQuote,
} from '../src/core/intent-requests.mjs';

const BTC = {
  assetId: 'nep141:btc.omft.near',
  symbol: 'BTC',
  decimals: 8,
};
const EURE = {
  assetId: 'nep141:eure.omft.near',
  symbol: 'EURe',
  decimals: 18,
};

function buildConfig() {
  return {
    tradingBtc: BTC,
    tradingEure: EURE,
    nearIntentsAccountId: 'unrip.test.near',
    nearVerifierContract: 'intents.near',
    intentRequestDefaultAmountEure: 5,
    intentRequestMaxAmountEure: 5,
    intentRequestDefaultSlippageBps: 200,
    intentRequestMaxSlippageBps: 200,
    intentRequestMinDeadlineMs: 60_000,
    intentRequestQuoteTimeoutMs: 10_000,
    intentRequestPublishTimeoutMs: 10_000,
    intentRequestStatusTimeoutMs: 10_000,
    intentRequestInventoryMaxAgeMs: 30_000,
    intentRequestPriceMaxAgeMs: 30_000,
    executorResponseTimeoutMs: 10_000,
  };
}

function buildStore({
  inventoryUnits = '5000000000000000000',
  nowIso = '2026-04-12T10:00:00.000Z',
  inventorySyncedAt = nowIso,
  priceObservedAt = nowIso,
} = {}) {
  const preflights = [];
  const submissions = [];
  return {
    preflights,
    submissions,
    async loadLatestInventorySnapshot() {
      return {
        ingested_at: nowIso,
        payload: {
          synced_at: inventorySyncedAt,
          spendable: {
            [EURE.assetId]: inventoryUnits,
            [BTC.assetId]: '1000',
          },
          pending_inbound: {
            [EURE.assetId]: '100000000000000000000',
          },
        },
      };
    },
    async loadLatestMarketPrice() {
      return {
        ingested_at: nowIso,
        payload: {
          observed_at: priceObservedAt,
          eure_per_btc: '50000',
        },
      };
    },
    async insertPreflight(payload) {
      preflights.push(payload);
    },
    async findPreflight({ requestId, idempotencyKey }) {
      return preflights.find((entry) => (
        (requestId && entry.request_id === requestId)
        || (idempotencyKey && entry.idempotency_key === idempotencyKey)
      )) || null;
    },
    async findSubmissionByRequest({ requestId }) {
      return [...submissions].reverse().find((entry) => entry.request_id === requestId) || null;
    },
    async insertSubmissionResult(payload) {
      submissions.push(payload);
    },
    async refreshOutcomes() {
      return [];
    },
  };
}

function buildRelay() {
  return {
    quoteCalls: 0,
    publishCalls: 0,
    async quote() {
      this.quoteCalls += 1;
      return [{
        quote_hash: 'quote-hash-1',
        amount_out: '10000',
        expiration_time: '2026-04-12T10:01:00.000Z',
      }];
    },
    async publishIntent() {
      this.publishCalls += 1;
      return { status: 'OK', intent_hash: 'intent-hash-1' };
    },
    async getStatus() {
      return { status: 'PENDING' };
    },
  };
}

function buildController({ store = buildStore(), relay = buildRelay(), armed = true, verifierRegistered = true } = {}) {
  return {
    store,
    relay,
    controller: createIntentRequestController({
      config: buildConfig(),
      store,
      relayRpcClient: relay,
      verifierClient: {
        async isPublicKeyRegistered() { return verifierRegistered; },
        async currentSalt() { return '252812b3'; },
      },
      signer: KeyPair.fromRandom('ed25519'),
      isArmed: () => armed,
      isPaused: () => false,
      now: () => Date.parse('2026-04-12T10:00:00.000Z'),
      uuid: (() => {
        let next = 1;
        return () => `id-${next++}`;
      })(),
    }),
  };
}

test('EURe decimal parsing, BTC expected receive, and slippage math are exact enough for request limits', () => {
  const sourceUnits = parseDecimalToUnits('5', EURE.decimals, { field: 'amount_eure' });
  const expectedBtc = computeBtcReceiveUnitsFromEure({
    eureUnits: sourceUnits,
    eurPerBtc: '50000',
    eureDecimals: EURE.decimals,
    btcDecimals: BTC.decimals,
  });

  assert.equal(sourceUnits, '5000000000000000000');
  assert.equal(expectedBtc, '10000');
  assert.equal(applySlippageBps(expectedBtc, 200), '9800');
});

test('solver quote normalization selects the best quote above explicit min receive', () => {
  const quotes = normalizeSolverQuotes({
    quotes: [
      { quote_hash: 'low', amount_out: '9700' },
      { quote_hash: 'best', amount_out: '10050' },
      { quote_hash: 'ok', amount_out: '9900' },
    ],
  });
  const selected = selectBestSolverQuote(quotes, { minDestinationAmountUnits: '9800' });

  assert.equal(selected.quote_hash, 'best');
  assert.deepEqual(buildSolverQuoteRequest({
    sourceAssetId: EURE.assetId,
    destinationAssetId: BTC.assetId,
    sourceAmountUnits: '5000000000000000000',
    minDeadlineMs: 60_000,
  }), {
    defuse_asset_identifier_in: EURE.assetId,
    defuse_asset_identifier_out: BTC.assetId,
    exact_amount_in: '5000000000000000000',
    min_deadline_ms: 60000,
  });
});

test('preflight is side-effect-free and does not publish a live intent', async () => {
  const { controller, relay } = buildController();
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });

  assert.equal(preflight.state, 'draft');
  assert.equal(preflight.live_submit_capable, true);
  assert.equal(preflight.reason_code, 'quote_available');
  assert.equal(relay.quoteCalls, 1);
  assert.equal(relay.publishCalls, 0);
});

test('insufficient spendable EURe blocks before solver quote or signing', async () => {
  const store = buildStore({ inventoryUnits: '0' });
  const relay = buildRelay();
  const { controller } = buildController({ store, relay });
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });

  assert.equal(preflight.state, 'blocked');
  assert.equal(preflight.reason_code, 'insufficient_spendable_eure');
  assert.equal(preflight.inventory_snapshot.pending_inbound[EURE.assetId], '100000000000000000000');
  assert.equal(relay.quoteCalls, 0);
  assert.equal(relay.publishCalls, 0);
});

test('duplicate request submit returns stored result and never publishes twice', async () => {
  const { controller, store, relay } = buildController();
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });
  const first = await controller.submit({ request_id: preflight.request_id });
  const second = await controller.submit({ request_id: preflight.request_id });

  assert.equal(first.submission_result.status, 'accepted_by_relay');
  assert.equal(second.duplicate, true);
  assert.equal(relay.publishCalls, 1);
  assert.equal(store.submissions.filter((entry) => entry.status === 'submit_requested').length, 1);
  assert.equal(store.submissions.filter((entry) => entry.status === 'accepted_by_relay').length, 1);
});

test('executor disarmed blocks request submission without calling relay publish', async () => {
  const { controller, relay } = buildController({ armed: false });
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });
  const result = await controller.submit({ request_id: preflight.request_id });

  assert.equal(result.submission_result.status, 'blocked');
  assert.equal(result.submission_result.result_code, 'executor_disarmed');
  assert.equal(relay.publishCalls, 0);
});


test('stale reference price blocks request preflight before solver quote', async () => {
  const store = buildStore({ priceObservedAt: '2026-04-12T09:59:00.000Z' });
  const relay = buildRelay();
  const { controller } = buildController({ store, relay });
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });

  assert.equal(preflight.state, 'blocked');
  assert.equal(preflight.reason_code, 'stale_reference_price');
  assert.equal(relay.quoteCalls, 0);
  assert.equal(relay.publishCalls, 0);
});

test('unregistered signer blocks request preflight before solver quote or signing', async () => {
  const relay = buildRelay();
  const { controller } = buildController({ relay, verifierRegistered: false });
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });

  assert.equal(preflight.state, 'blocked');
  assert.equal(preflight.reason_code, 'signer_not_registered');
  assert.equal(relay.quoteCalls, 0);
  assert.equal(relay.publishCalls, 0);
});

test('relay publish failure records submit_requested first and never reports completion', async () => {
  const relay = buildRelay();
  relay.publishIntent = async function publishIntent() {
    this.publishCalls += 1;
    throw new Error('relay publish unavailable');
  };
  const { controller, store } = buildController({ relay });
  const preflight = await controller.preflight({ amount_eure: '5', slippage_bps: 200 });
  const result = await controller.submit({ request_id: preflight.request_id });

  assert.equal(result.submission_result.status, 'failed');
  assert.equal(result.submission_result.result_code, 'publish_intent_failed');
  assert.equal(result.submission_result.result_text, 'relay publish unavailable');
  assert.equal(relay.publishCalls, 1);
  assert.equal(store.submissions[0].status, 'submit_requested');
  assert.equal(store.submissions[1].status, 'failed');
  assert.notEqual(result.submission_result.status, 'completed');
});