"""Certificate implementation for BSV certificate operations.

Stub implementation for certificate testing.
"""

from typing import Any


class Certificate:
    """Base certificate class."""

    def __init__(
        self,
        cert_type: str,
        serial_number: str,
        subject: str,
        certifier: str,
        revocation_outpoint: str,
        fields: dict[str, Any],
    ):
        """Initialize certificate."""
        self.type = cert_type
        self.serial_number = serial_number
        self.subject = subject
        self.certifier = certifier
        self.revocation_outpoint = revocation_outpoint
        self.fields = fields
        self.signature = ""

    def sign(self, wallet: Any) -> None:
        """Sign the certificate."""
        self.signature = "mock_signature"

    def verify(self) -> bool:
        """Verify certificate signature."""
        return True


class MasterCertificate:
    """Master certificate with encryption capabilities."""

    @staticmethod
    def create_certificate_fields(wallet: Any, recipient_public_key: str, fields: dict[str, Any]) -> dict[str, Any]:
        """Create encrypted certificate fields."""
        return {"certificateFields": fields, "masterKeyring": "mock_keyring"}

    @staticmethod
    def decrypt_fields(wallet: Any, master_keyring: str, fields: dict[str, Any], certifier: str) -> None:
        """Decrypt certificate fields."""
        # Mock decryption - fields remain unchanged

    @staticmethod
    def create_keyring_for_verifier(
        wallet: Any,
        certifier_public_key: str,
        verifier_public_key: str,
        fields: dict[str, Any],
        disclosed_fields: list[str],
        master_keyring: str,
        serial_number: str,
    ) -> dict[str, Any]:
        """Create keyring for verifier with limited field access."""
        return {"verifierKeyring": "mock_verifier_keyring", "disclosedFields": disclosed_fields}


class VerifiableCertificate:
    """Verifiable certificate that can decrypt disclosed fields."""

    def __init__(
        self,
        cert_type: str,
        serial_number: str,
        subject: str,
        certifier: str,
        revocation_outpoint: str,
        fields: dict[str, Any],
        keyring: dict[str, Any],
        signature: str,
    ):
        """Initialize verifiable certificate."""
        self.type = cert_type
        self.serial_number = serial_number
        self.subject = subject
        self.certifier = certifier
        self.revocation_outpoint = revocation_outpoint
        self.fields = fields
        self.keyring = keyring
        self.signature = signature

    def decrypt_fields(self, wallet: Any) -> dict[str, Any]:
        """Decrypt fields accessible to verifier."""
        # Mock implementation - return some fields as "undisclosed"
        result = {}
        disclosed_fields = self.keyring.get("disclosedFields", [])

        for key, value in self.fields.items():
            if key in disclosed_fields:
                result[key] = value
            else:
                result[key] = f"undisclosed_{value}"

        return result
