"""
Tests for vault subaccount support functionality.

These tests verify:
1. KnownSubaccount entity creation and retrieval
2. Refresh with specific subaccount
3. Transfer with to_subaccount and from_subaccount
4. refresh_invoice function
5. Pagination tracking (scan_end_tx_id)
"""

import json

import pytest


class TestKnownSubaccount:
    """Tests for KnownSubaccount entity."""

    def test_create_known_subaccount(self):
        """Test creating a KnownSubaccount entity."""
        # This would be run in the canister context
        # For now, we document the expected behavior

        # Expected:
        # from vault_lib.entities import KnownSubaccount
        #
        # subaccount_hex = "696e765f6661626572" + "00" * 23  # 64 chars
        # sa = KnownSubaccount(
        #     _id=subaccount_hex,
        #     subaccount_hex=subaccount_hex,
        #     source="invoice",
        #     invoice_id="inv_123",
        # )
        #
        # assert sa.subaccount_hex == subaccount_hex
        # assert sa.source == "invoice"
        # assert sa.scan_end_tx_id == 0
        # assert sa.balance == 0
        pass

    def test_known_subaccount_lookup(self):
        """Test looking up a KnownSubaccount by its hex ID."""
        # Expected:
        # sa = KnownSubaccount[subaccount_hex]
        # assert sa is not None
        pass


class TestRefreshWithSubaccount:
    """Tests for refresh functionality with subaccounts."""

    def test_refresh_default_subaccount(self):
        """Test that refresh queries the default subaccount."""
        # Expected behavior:
        # - Call refresh with no subaccount parameter
        # - Should query transactions for the default (None) subaccount
        # - Should also query all registered KnownSubaccounts
        pass

    def test_refresh_specific_subaccount(self):
        """Test refreshing a specific subaccount."""
        # Expected behavior:
        # - Call refresh with subaccount_hex parameter
        # - Should only query that specific subaccount
        # - Should update KnownSubaccount.scan_end_tx_id
        pass

    def test_refresh_registers_subaccount_from_invoice(self):
        """Test that refresh_invoice registers the invoice's subaccount."""
        # Expected behavior:
        # - Call refresh_invoice with invoice_id
        # - Should create KnownSubaccount if not exists
        # - Should refresh that specific subaccount
        pass


class TestTransferWithSubaccount:
    """Tests for transfer functionality with subaccounts."""

    def test_transfer_to_subaccount(self):
        """Test transferring to a specific subaccount."""
        # Expected behavior:
        # - Call transfer with to_subaccount parameter
        # - The ICRC transfer should include the subaccount in the 'to' Account
        pass

    def test_transfer_from_subaccount(self):
        """Test transferring from a specific vault subaccount."""
        # Expected behavior:
        # - Call transfer with from_subaccount parameter
        # - The ICRC transfer should include from_subaccount in TransferArg
        pass

    def test_transfer_with_both_subaccounts(self):
        """Test transferring from vault subaccount to recipient subaccount."""
        # Expected behavior:
        # - Call transfer with both to_subaccount and from_subaccount
        # - Both should be included in the ICRC transfer
        pass


class TestPaginationTracking:
    """Tests for pagination tracking with scan_end_tx_id."""

    def test_scan_end_tx_id_updated_after_refresh(self):
        """Test that scan_end_tx_id is updated after processing transactions."""
        # Expected behavior:
        # - After refresh, app_data().scan_end_tx_id should be set to
        #   the highest transaction ID processed
        pass

    def test_known_subaccount_scan_position_updated(self):
        """Test that KnownSubaccount.scan_end_tx_id is updated per-subaccount."""
        # Expected behavior:
        # - After refreshing a specific subaccount, its scan_end_tx_id
        #   should be updated to the highest tx ID for that subaccount
        pass


class TestSubaccountHexValidation:
    """Tests for subaccount hex string validation."""

    def test_valid_64_char_hex(self):
        """Test that valid 64-character hex strings are accepted."""
        valid_hex = "0" * 64
        # Should not raise
        bytes.fromhex(valid_hex)
        assert len(bytes.fromhex(valid_hex)) == 32

    def test_invalid_hex_raises(self):
        """Test that invalid hex strings raise ValueError."""
        invalid_hex = "not_a_hex_string"
        with pytest.raises(ValueError):
            bytes.fromhex(invalid_hex)

    def test_wrong_length_hex(self):
        """Test behavior with wrong-length hex strings."""
        short_hex = "00" * 16  # 32 chars = 16 bytes
        # This would create a 16-byte subaccount, which is invalid
        # The code should validate length or the ledger will reject it
        assert len(bytes.fromhex(short_hex)) == 16  # Not 32 bytes


# Integration test examples (would need canister deployment)
class TestIntegration:
    """Integration tests requiring deployed canisters."""

    @pytest.mark.skip(reason="Requires deployed canister")
    def test_end_to_end_invoice_payment_flow(self):
        """
        End-to-end test:
        1. Create invoice (generates subaccount)
        2. Simulate payment to that subaccount
        3. Call refresh_invoice
        4. Verify invoice status updated to Paid
        """
        pass

    @pytest.mark.skip(reason="Requires deployed canister")
    def test_transfer_from_subaccount_to_recover_funds(self):
        """
        Test recovering funds from a subaccount:
        1. Funds are in vault subaccount X
        2. Call transfer with from_subaccount=X
        3. Funds should be sent from subaccount X
        """
        pass


if __name__ == "__main__":
    pytest.main([__file__, "-v"])
