import { CoinConfig } from "@ledgerhq/coin-module-framework/config";
import {
  createEmptyHistoryCache,
  encodeAccountId,
} from "@ledgerhq/ledger-wallet-framework/account";
import { SignerContext } from "@ledgerhq/ledger-wallet-framework/signer";
import prepareTransferMock from "@ledgerhq/hw-app-canton/tests/fixtures/prepare-transfer.json";
import { CryptoCurrency, CryptoCurrencyIdSchema } from "@ledgerhq/ledger-wallet-framework/types";
import type { Account } from "@ledgerhq/types-live";
import BigNumber from "bignumber.js";
import coinConfig, { type CantonCoinConfig } from "../config";
import type { CantonAccount, Transaction } from "../types";
import type {
  InstrumentBalance,
  OnboardingPrepareResponse,
  PrepareTransferResponse,
  TransferProposal,
} from "../types/gateway";
import type {
  CantonPreparedTransaction,
  CantonSignature,
  CantonSigner,
  CantonUntypedVersionedMessage,
} from "../types/signer";
import {
  type CantonTestKeyPair,
  createMockSigner as createCantonMockSigner,
  generateMockKeyPair,
} from "./cantonTestUtils";

const DEFAULT_VALUES = {
  INSTRUMENT: {
    ADMIN_ID: "AmuletAdmin",
    ID: "Amulet",
  },
  CONFIG: {
    GATEWAY_URL: "https://canton-gateway-devnet.api.live.ledger-test.com",
    NETWORK_TYPE: "devnet",
  },
} as const;

export function createFactory<T>(defaults: T) {
  return (overrides: Partial<T> = {}): T => ({
    ...defaults,
    ...overrides,
  });
}

export const createMockCantonCurrency = (): CryptoCurrency => {
  const mockCurrency = {
    id: CryptoCurrencyIdSchema.parse("canton_network"),
    name: "Canton",
    type: "CryptoCurrency",
    family: "canton",
    units: [{ name: "Canton", code: "CANTON", magnitude: 38 }],
    ticker: "CANTON",
    scheme: "canton",
    color: "#000000",
    managerAppName: "Canton",
    coinType: 6767,
    explorerViews: [],
  } satisfies CryptoCurrency;
  return mockCurrency;
};

export const createMockCantonAccount = (
  overrides: Partial<Account | CantonAccount> = {},
  partialCantonResources?: Partial<CantonAccount["cantonResources"]>,
) => {
  const currency = createMockCantonCurrency();
  const derivationMode = "canton" as const;
  const freshAddressPath = "44'/6767'/0'/0'/0'";
  const freshAddress =
    "alice::1220f6efa949a0dcaab8bb1a066cf0ecbca370375e90552edd6d33c14be01082b000";

  const cantonResources = {
    publicKey: "",
    instrumentUtxoCounts: {},
    pendingTransferProposals: [],
  };

  const accountId = encodeAccountId({
    type: "js",
    version: "2",
    currencyId: currency.id,
    xpubOrAddress: freshAddress,
    derivationMode,
  });

  const baseAccount = {
    id: accountId,
    type: "Account",
    used: true,
    currency,
    derivationMode,
    index: 0,
    freshAddress,
    freshAddressPath,
    creationDate: new Date(),
    lastSyncDate: new Date(),
    balance: new BigNumber(0),
    spendableBalance: new BigNumber(0),
    seedIdentifier: "test_seed",
    blockHeight: 0,
    operationsCount: 0,
    operations: [],
    pendingOperations: [],
    balanceHistoryCache: createEmptyHistoryCache(),
    swapHistory: [],
    subAccounts: [],
    cantonResources,
    ...overrides,
  };

  const cantonResourcesFromOverrides =
    "cantonResources" in overrides ? overrides.cantonResources : undefined;
  if (cantonResourcesFromOverrides || partialCantonResources) {
    return {
      ...baseAccount,
      cantonResources: {
        ...cantonResources,
        ...cantonResourcesFromOverrides,
        ...partialCantonResources,
      },
    } as CantonAccount;
  }

  return baseAccount as CantonAccount;
};

class MockCantonSigner implements CantonSigner {
  private readonly keyPair: CantonTestKeyPair;
  private readonly mockSigner: ReturnType<typeof createCantonMockSigner>;

  constructor(keyPair?: CantonTestKeyPair) {
    this.keyPair = keyPair || generateMockKeyPair();
    this.mockSigner = createCantonMockSigner(this.keyPair);
  }

  async getAddress(path: string, _display?: boolean) {
    const address = await this.mockSigner.getAddress(path);
    return {
      ...address,
      path,
    };
  }

  async signTransaction(
    path: string,
    data: CantonPreparedTransaction | CantonUntypedVersionedMessage | string,
  ): Promise<CantonSignature> {
    const signatureResult = await this.mockSigner.signTransaction(path, data);

    if (typeof data === "object" && "transactions" in data && typeof data.challenge === "string") {
      const challengeHash = data.challenge.replace(/^0x/, "");
      return {
        signature: signatureResult.signature,
        applicationSignature: this.keyPair.sign(challengeHash),
      };
    }

    return { signature: signatureResult.signature };
  }

  getKeyPair(): CantonTestKeyPair {
    return this.keyPair;
  }
}

export const createMockCantonSigner = (keyPair?: CantonTestKeyPair): MockCantonSigner => {
  return new MockCantonSigner(keyPair);
};

export const createMockSignerContext = (
  signer?: CantonSigner,
  keyPair?: CantonTestKeyPair,
): SignerContext<CantonSigner> => {
  const mockSigner = signer || createMockCantonSigner(keyPair);
  const mockFn = jest.fn(
    async (_deviceId: string, callback: (signer: CantonSigner) => Promise<CantonSignature>) => {
      return callback(mockSigner);
    },
  );
  return mockFn as SignerContext<CantonSigner>;
};

export const createMockCantonSignature = createFactory<CantonSignature>({
  signature: "test-signature",
});

export const createMockTransaction = createFactory<Transaction>({
  family: "canton",
  amount: new BigNumber(100),
  recipient: "alice::1220f6efa949a0dcaab8bb1a066cf0ecbca370375e90552edd6d33c14be01082b000",
  fee: new BigNumber(10),
  tokenId: "",
  memo: "",
});

export const createMockPrepareTransferResponse = createFactory<PrepareTransferResponse>({
  hash: "test-hash",
  json: prepareTransferMock.json,
  serialized: "serialized-transaction",
  step: { type: "single-step" },
});

const createMockOnboardingTransactions = (
  overrides?: Partial<OnboardingPrepareResponse["transactions"]>,
): OnboardingPrepareResponse["transactions"] => ({
  namespace_transaction: {
    serialized: "namespace-transaction-data",
    transaction: {},
    hash: "namespace-hash",
  },
  party_to_key_transaction: {
    serialized: "party-to-key-transaction-data",
    transaction: {},
    hash: "party-to-key-hash",
  },
  party_to_participant_transaction: {
    serialized: "party-to-participant-transaction-data",
    transaction: {},
    hash: "party-to-participant-hash",
  },
  combined_hash: "combined-hash",
  ...overrides,
});

export const createMockOnboardingPrepareResponse = createFactory<OnboardingPrepareResponse>({
  party_id: "test-party-id",
  party_name: "test-party-name",
  public_key_fingerprint: "test-fingerprint",
  transactions: createMockOnboardingTransactions(),
  challenge_nonce: "1234567890abcdef",
  challenge_deadline: 1735689599,
});

const createMockInstrumentBalance = createFactory<InstrumentBalance>({
  admin_id: DEFAULT_VALUES.INSTRUMENT.ADMIN_ID,
  instrument_id: DEFAULT_VALUES.INSTRUMENT.ID,
  amount: "1000",
  locked: false,
  utxo_count: 1,
});

export const createMockInstrumentBalances = (
  count: number = 1,
  overrides: Partial<InstrumentBalance> | Partial<InstrumentBalance>[] = {},
): InstrumentBalance[] => {
  const overridesArray = Array.isArray(overrides) ? overrides : [overrides];
  return Array.from({ length: count }, (_, index) =>
    createMockInstrumentBalance(overridesArray[index] || overridesArray[0] || {}),
  );
};

export const setupMockCoinConfig = (overrides: Partial<Record<string, unknown>> = {}): void => {
  coinConfig.setCoinConfig(
    () =>
      ({
        gatewayUrl: DEFAULT_VALUES.CONFIG.GATEWAY_URL,
        useGateway: true,
        networkType: DEFAULT_VALUES.CONFIG.NETWORK_TYPE,
        nativeInstrumentId: DEFAULT_VALUES.INSTRUMENT.ID,
        status: {
          type: "active",
        },
        ...overrides,
      }) as unknown as ReturnType<Parameters<typeof coinConfig.setCoinConfig>[0]>,
  );
};

export const createMockCoinConfigValue = createFactory({
  gatewayUrl: DEFAULT_VALUES.CONFIG.GATEWAY_URL,
  useGateway: true,
  networkType: DEFAULT_VALUES.CONFIG.NETWORK_TYPE,
  nativeInstrumentId: DEFAULT_VALUES.INSTRUMENT.ID,
  minReserve: 100,
  status: { type: "active" as const },
});

export const createMockCoinConfig = (): CoinConfig<CantonCoinConfig> => {
  const configValue = createMockCoinConfigValue();
  return jest.fn(() => configValue);
};

export const createMockPendingTransferProposal = createFactory<TransferProposal>({
  contract_id: "test-contract-id",
  sender: "alice::1220f6efa949a0dcaab8bb1a066cf0ecbca370375e90552edd6d33c14be01082b000",
  receiver: "bob::122014d3f17b82700d15bef451bcb1d112136eb82bb3f4fd2a4649f95a9c4632b000",
  instrument_admin: DEFAULT_VALUES.INSTRUMENT.ADMIN_ID,
  instrument_id: DEFAULT_VALUES.INSTRUMENT.ID,
  amount: "100",
  memo: "test memo",
  expires_at_micros: 1_800_000_000_000_000, // fixed far-future timestamp (microseconds)
  update_id: "test-update-id",
});

export { generateMockKeyPair };
export type { CantonTestKeyPair } from "./cantonTestUtils";