import json
from datetime import datetime
from typing import Optional

import httpx
from lnbits.db import Database
from lnbits.helpers import urlsafe_short_hash

from .models import (
    Account,
    AccountPermission,
    AccountType,
    AssertionStatus,
    BalanceAssertion,
    CastleSettings,
    CreateAccount,
    CreateAccountPermission,
    CreateBalanceAssertion,
    CreateEntryLine,
    CreateJournalEntry,
    CreateUserEquityStatus,
    EntryLine,
    JournalEntry,
    PermissionType,
    StoredUserWalletSettings,
    UserBalance,
    UserCastleSettings,
    UserEquityStatus,
    UserWalletSettings,
)

# Import core accounting logic
from .core.validation import (
    ValidationError,
    validate_journal_entry,
    validate_balance,
    validate_receivable_entry,
    validate_expense_entry,
    validate_payment_entry,
)

db = Database("ext_castle")


# ===== ACCOUNT OPERATIONS =====


async def create_account(data: CreateAccount) -> Account:
    account_id = urlsafe_short_hash()
    account = Account(
        id=account_id,
        name=data.name,
        account_type=data.account_type,
        description=data.description,
        user_id=data.user_id,
        created_at=datetime.now(),
    )
    await db.insert("accounts", account)
    return account


async def get_account(account_id: str) -> Optional[Account]:
    return await db.fetchone(
        "SELECT * FROM accounts WHERE id = :id",
        {"id": account_id},
        Account,
    )


async def get_account_by_name(name: str) -> Optional[Account]:
    """Get account by name (hierarchical format)"""
    return await db.fetchone(
        "SELECT * FROM accounts WHERE name = :name",
        {"name": name},
        Account,
    )


async def get_all_accounts() -> list[Account]:
    return await db.fetchall(
        "SELECT * FROM accounts ORDER BY account_type, name",
        model=Account,
    )


async def get_accounts_by_type(account_type: AccountType) -> list[Account]:
    return await db.fetchall(
        "SELECT * FROM accounts WHERE account_type = :type ORDER BY name",
        {"type": account_type.value},
        Account,
    )


async def get_or_create_user_account(
    user_id: str, account_type: AccountType, base_name: str
) -> Account:
    """
    Get or create a user-specific account with hierarchical naming.

    This function checks if the account exists in Fava/Beancount and creates it
    if it doesn't exist. The account is also registered in Castle's database for
    metadata tracking (permissions, descriptions, etc.).

    Examples:
        get_or_create_user_account("af983632", AccountType.ASSET, "Accounts Receivable")
        → "Assets:Receivable:User-af983632"

        get_or_create_user_account("af983632", AccountType.LIABILITY, "Accounts Payable")
        → "Liabilities:Payable:User-af983632"
    """
    from .account_utils import format_hierarchical_account_name
    from .fava_client import get_fava_client
    from loguru import logger

    # Generate hierarchical account name
    account_name = format_hierarchical_account_name(account_type, base_name, user_id)

    # Try to find existing account with this hierarchical name in Castle DB
    account = await db.fetchone(
        """
        SELECT * FROM accounts
        WHERE user_id = :user_id AND account_type = :type AND name = :name
        """,
        {"user_id": user_id, "type": account_type.value, "name": account_name},
        Account,
    )

    if not account:
        # Check if account exists in Fava/Beancount
        fava = get_fava_client()
        try:
            # Query Fava for this account
            query = f"SELECT account WHERE account = '{account_name}'"
            async with httpx.AsyncClient(timeout=5.0) as client:
                response = await client.get(
                    f"{fava.base_url}/query",
                    params={"query_string": query}
                )
                response.raise_for_status()
                result = response.json()

                # Check if account exists in Fava
                fava_has_account = len(result.get("data", {}).get("rows", [])) > 0

                if not fava_has_account:
                    # Create account in Fava/Beancount via Open directive
                    logger.info(f"Creating account in Fava: {account_name}")
                    await fava.add_account(
                        account_name=account_name,
                        currencies=["EUR", "SATS", "USD"],  # Support common currencies
                        metadata={
                            "user_id": user_id,
                            "description": f"User-specific {account_type.value} account"
                        }
                    )
                    logger.info(f"Created account in Fava: {account_name}")
                else:
                    logger.info(f"Account already exists in Fava: {account_name}")

        except Exception as e:
            logger.warning(f"Could not check/create account in Fava: {e}")
            # Continue anyway - account creation in Castle DB is still useful for metadata

        # Create account in Castle DB for metadata tracking
        account = await create_account(
            CreateAccount(
                name=account_name,
                account_type=account_type,
                description=f"User-specific {account_type.value} account",
                user_id=user_id,
            )
        )

    return account


# ===== JOURNAL ENTRY OPERATIONS =====


# ===== JOURNAL ENTRY OPERATIONS (REMOVED) =====
#
# All journal entry operations have been moved to Fava/Beancount.
# Castle no longer maintains its own journal_entries and entry_lines tables.
#
# For journal entry operations, see:
# - views_api.py: api_create_journal_entry() - writes to Fava via FavaClient
# - views_api.py: API endpoints query Fava via FavaClient for reading entries
#
# Migration: m016_drop_obsolete_journal_tables
# Removed functions:
#   - create_journal_entry()
#   - get_journal_entry()
#   - get_journal_entry_by_reference()
#   - get_entry_lines()
#   - get_all_journal_entries()
#   - get_journal_entries_by_user()
#   - count_all_journal_entries()
#   - count_journal_entries_by_user()
#   - get_journal_entries_by_user_and_account_type()
#   - count_journal_entries_by_user_and_account_type()
#   - get_account_transactions()


# ===== SETTINGS =====


async def create_castle_settings(
    user_id: str, data: CastleSettings
) -> CastleSettings:
    settings = UserCastleSettings(**data.dict(), id=user_id)
    await db.insert("extension_settings", settings)
    return settings


async def get_castle_settings(user_id: str) -> Optional[CastleSettings]:
    return await db.fetchone(
        """
        SELECT * FROM extension_settings
        WHERE id = :user_id
        """,
        {"user_id": user_id},
        CastleSettings,
    )


async def update_castle_settings(
    user_id: str, data: CastleSettings
) -> CastleSettings:
    settings = UserCastleSettings(**data.dict(), id=user_id)
    await db.update("extension_settings", settings)
    return settings


# ===== USER WALLET SETTINGS =====


async def create_user_wallet_settings(
    user_id: str, data: UserWalletSettings
) -> UserWalletSettings:
    settings = StoredUserWalletSettings(**data.dict(), id=user_id)
    await db.insert("user_wallet_settings", settings)
    return settings


async def get_user_wallet_settings(user_id: str) -> Optional[UserWalletSettings]:
    return await db.fetchone(
        """
        SELECT * FROM user_wallet_settings
        WHERE id = :user_id
        """,
        {"user_id": user_id},
        UserWalletSettings,
    )


async def update_user_wallet_settings(
    user_id: str, data: UserWalletSettings
) -> UserWalletSettings:
    settings = StoredUserWalletSettings(**data.dict(), id=user_id)
    await db.update("user_wallet_settings", settings)
    return settings


async def get_all_user_wallet_settings() -> list[StoredUserWalletSettings]:
    """Get all user wallet settings"""
    return await db.fetchall(
        "SELECT * FROM user_wallet_settings ORDER BY id",
        {},
        StoredUserWalletSettings,
    )


# ===== MANUAL PAYMENT REQUESTS =====


async def create_manual_payment_request(
    user_id: str, amount: int, description: str
) -> "ManualPaymentRequest":
    """Create a new manual payment request"""
    from .models import ManualPaymentRequest

    request_id = urlsafe_short_hash()
    request = ManualPaymentRequest(
        id=request_id,
        user_id=user_id,
        amount=amount,
        description=description,
        status="pending",
        created_at=datetime.now(),
    )

    await db.execute(
        """
        INSERT INTO manual_payment_requests (id, user_id, amount, description, status, created_at)
        VALUES (:id, :user_id, :amount, :description, :status, :created_at)
        """,
        {
            "id": request.id,
            "user_id": request.user_id,
            "amount": request.amount,
            "description": request.description,
            "status": request.status,
            "created_at": request.created_at,
        },
    )

    return request


async def get_manual_payment_request(request_id: str) -> Optional["ManualPaymentRequest"]:
    """Get a manual payment request by ID"""
    from .models import ManualPaymentRequest

    return await db.fetchone(
        "SELECT * FROM manual_payment_requests WHERE id = :id",
        {"id": request_id},
        ManualPaymentRequest,
    )


async def get_user_manual_payment_requests(
    user_id: str, limit: int = 100
) -> list["ManualPaymentRequest"]:
    """Get all manual payment requests for a specific user"""
    from .models import ManualPaymentRequest

    return await db.fetchall(
        """
        SELECT * FROM manual_payment_requests
        WHERE user_id = :user_id
        ORDER BY created_at DESC
        LIMIT :limit
        """,
        {"user_id": user_id, "limit": limit},
        ManualPaymentRequest,
    )


async def get_all_manual_payment_requests(
    status: Optional[str] = None, limit: int = 100
) -> list["ManualPaymentRequest"]:
    """Get all manual payment requests, optionally filtered by status"""
    from .models import ManualPaymentRequest

    if status:
        return await db.fetchall(
            """
            SELECT * FROM manual_payment_requests
            WHERE status = :status
            ORDER BY created_at DESC
            LIMIT :limit
            """,
            {"status": status, "limit": limit},
            ManualPaymentRequest,
        )
    else:
        return await db.fetchall(
            """
            SELECT * FROM manual_payment_requests
            ORDER BY created_at DESC
            LIMIT :limit
            """,
            {"limit": limit},
            ManualPaymentRequest,
        )


async def approve_manual_payment_request(
    request_id: str, reviewed_by: str, journal_entry_id: str
) -> Optional["ManualPaymentRequest"]:
    """Approve a manual payment request"""
    from .models import ManualPaymentRequest

    await db.execute(
        """
        UPDATE manual_payment_requests
        SET status = 'approved', reviewed_at = :reviewed_at, reviewed_by = :reviewed_by, journal_entry_id = :journal_entry_id
        WHERE id = :id
        """,
        {
            "id": request_id,
            "reviewed_at": datetime.now(),
            "reviewed_by": reviewed_by,
            "journal_entry_id": journal_entry_id,
        },
    )

    return await get_manual_payment_request(request_id)


async def reject_manual_payment_request(
    request_id: str, reviewed_by: str
) -> Optional["ManualPaymentRequest"]:
    """Reject a manual payment request"""
    from .models import ManualPaymentRequest

    await db.execute(
        """
        UPDATE manual_payment_requests
        SET status = 'rejected', reviewed_at = :reviewed_at, reviewed_by = :reviewed_by
        WHERE id = :id
        """,
        {
            "id": request_id,
            "reviewed_at": datetime.now(),
            "reviewed_by": reviewed_by,
        },
    )

    return await get_manual_payment_request(request_id)


# ===== BALANCE ASSERTION OPERATIONS =====


async def create_balance_assertion(
    data: CreateBalanceAssertion, created_by: str
) -> BalanceAssertion:
    """Create a new balance assertion"""
    from decimal import Decimal

    assertion_id = urlsafe_short_hash()
    assertion_date = data.date if data.date else datetime.now()

    assertion = BalanceAssertion(
        id=assertion_id,
        date=assertion_date,
        account_id=data.account_id,
        expected_balance_sats=data.expected_balance_sats,
        expected_balance_fiat=data.expected_balance_fiat,
        fiat_currency=data.fiat_currency,
        tolerance_sats=data.tolerance_sats,
        tolerance_fiat=data.tolerance_fiat,
        status=AssertionStatus.PENDING,
        created_by=created_by,
        created_at=datetime.now(),
    )

    # Manually insert with Decimal fields converted to strings
    await db.execute(
        """
        INSERT INTO balance_assertions (
            id, date, account_id, expected_balance_sats, expected_balance_fiat,
            fiat_currency, tolerance_sats, tolerance_fiat, status, created_by, created_at
        ) VALUES (
            :id, :date, :account_id, :expected_balance_sats, :expected_balance_fiat,
            :fiat_currency, :tolerance_sats, :tolerance_fiat, :status, :created_by, :created_at
        )
        """,
        {
            "id": assertion.id,
            "date": assertion.date,
            "account_id": assertion.account_id,
            "expected_balance_sats": assertion.expected_balance_sats,
            "expected_balance_fiat": str(assertion.expected_balance_fiat) if assertion.expected_balance_fiat else None,
            "fiat_currency": assertion.fiat_currency,
            "tolerance_sats": assertion.tolerance_sats,
            "tolerance_fiat": str(assertion.tolerance_fiat),
            "status": assertion.status.value,
            "created_by": assertion.created_by,
            "created_at": assertion.created_at,
        },
    )
    return assertion


async def get_balance_assertion(assertion_id: str) -> Optional[BalanceAssertion]:
    """Get a balance assertion by ID"""
    from decimal import Decimal

    row = await db.fetchone(
        "SELECT * FROM balance_assertions WHERE id = :id",
        {"id": assertion_id},
    )

    if not row:
        return None

    # Parse Decimal fields from TEXT storage
    return BalanceAssertion(
        id=row["id"],
        date=row["date"],
        account_id=row["account_id"],
        expected_balance_sats=row["expected_balance_sats"],
        expected_balance_fiat=Decimal(row["expected_balance_fiat"]) if row["expected_balance_fiat"] else None,
        fiat_currency=row["fiat_currency"],
        tolerance_sats=row["tolerance_sats"],
        tolerance_fiat=Decimal(row["tolerance_fiat"]) if row["tolerance_fiat"] else Decimal("0"),
        checked_balance_sats=row["checked_balance_sats"],
        checked_balance_fiat=Decimal(row["checked_balance_fiat"]) if row["checked_balance_fiat"] else None,
        difference_sats=row["difference_sats"],
        difference_fiat=Decimal(row["difference_fiat"]) if row["difference_fiat"] else None,
        status=AssertionStatus(row["status"]),
        created_by=row["created_by"],
        created_at=row["created_at"],
        checked_at=row["checked_at"],
    )


async def get_balance_assertions(
    account_id: Optional[str] = None,
    status: Optional[AssertionStatus] = None,
    limit: int = 100,
) -> list[BalanceAssertion]:
    """Get balance assertions with optional filters"""
    from decimal import Decimal

    if account_id and status:
        rows = await db.fetchall(
            """
            SELECT * FROM balance_assertions
            WHERE account_id = :account_id AND status = :status
            ORDER BY date DESC
            LIMIT :limit
            """,
            {"account_id": account_id, "status": status.value, "limit": limit},
        )
    elif account_id:
        rows = await db.fetchall(
            """
            SELECT * FROM balance_assertions
            WHERE account_id = :account_id
            ORDER BY date DESC
            LIMIT :limit
            """,
            {"account_id": account_id, "limit": limit},
        )
    elif status:
        rows = await db.fetchall(
            """
            SELECT * FROM balance_assertions
            WHERE status = :status
            ORDER BY date DESC
            LIMIT :limit
            """,
            {"status": status.value, "limit": limit},
        )
    else:
        rows = await db.fetchall(
            """
            SELECT * FROM balance_assertions
            ORDER BY date DESC
            LIMIT :limit
            """,
            {"limit": limit},
        )

    assertions = []
    for row in rows:
        assertions.append(
            BalanceAssertion(
                id=row["id"],
                date=row["date"],
                account_id=row["account_id"],
                expected_balance_sats=row["expected_balance_sats"],
                expected_balance_fiat=Decimal(row["expected_balance_fiat"]) if row["expected_balance_fiat"] else None,
                fiat_currency=row["fiat_currency"],
                tolerance_sats=row["tolerance_sats"],
                tolerance_fiat=Decimal(row["tolerance_fiat"]) if row["tolerance_fiat"] else Decimal("0"),
                checked_balance_sats=row["checked_balance_sats"],
                checked_balance_fiat=Decimal(row["checked_balance_fiat"]) if row["checked_balance_fiat"] else None,
                difference_sats=row["difference_sats"],
                difference_fiat=Decimal(row["difference_fiat"]) if row["difference_fiat"] else None,
                status=AssertionStatus(row["status"]),
                created_by=row["created_by"],
                created_at=row["created_at"],
                checked_at=row["checked_at"],
            )
        )

    return assertions


async def check_balance_assertion(assertion_id: str) -> BalanceAssertion:
    """
    Check a balance assertion by comparing expected vs actual balance.
    Updates the assertion with the check results.
    Uses Fava/Beancount for balance queries.
    """
    from decimal import Decimal
    from .fava_client import get_fava_client

    assertion = await get_balance_assertion(assertion_id)
    if not assertion:
        raise ValueError(f"Balance assertion {assertion_id} not found")

    # Get actual account balance from Fava
    account = await get_account(assertion.account_id)
    if not account:
        raise ValueError(f"Account {assertion.account_id} not found")

    fava = get_fava_client()

    # Get balance from Fava
    balance_data = await fava.get_account_balance(account.name)
    actual_balance = balance_data["sats"]

    # Get fiat balance if needed
    actual_fiat_balance = None
    if assertion.fiat_currency and account.user_id:
        user_balance_data = await fava.get_user_balance(account.user_id)
        actual_fiat_balance = user_balance_data["fiat_balances"].get(assertion.fiat_currency, Decimal("0"))

    # Check sats balance
    difference_sats = actual_balance - assertion.expected_balance_sats
    sats_match = abs(difference_sats) <= assertion.tolerance_sats

    # Check fiat balance if applicable
    fiat_match = True
    difference_fiat = None
    if assertion.expected_balance_fiat is not None and actual_fiat_balance is not None:
        difference_fiat = actual_fiat_balance - assertion.expected_balance_fiat
        fiat_match = abs(difference_fiat) <= assertion.tolerance_fiat

    # Determine overall status
    status = AssertionStatus.PASSED if (sats_match and fiat_match) else AssertionStatus.FAILED

    # Update assertion with check results
    await db.execute(
        """
        UPDATE balance_assertions
        SET checked_balance_sats = :checked_sats,
            checked_balance_fiat = :checked_fiat,
            difference_sats = :diff_sats,
            difference_fiat = :diff_fiat,
            status = :status,
            checked_at = :checked_at
        WHERE id = :id
        """,
        {
            "id": assertion_id,
            "checked_sats": actual_balance,
            "checked_fiat": str(actual_fiat_balance) if actual_fiat_balance is not None else None,
            "diff_sats": difference_sats,
            "diff_fiat": str(difference_fiat) if difference_fiat is not None else None,
            "status": status.value,
            "checked_at": datetime.now(),
        },
    )

    # Return updated assertion
    return await get_balance_assertion(assertion_id)


async def delete_balance_assertion(assertion_id: str) -> None:
    """Delete a balance assertion"""
    await db.execute(
        "DELETE FROM balance_assertions WHERE id = :id",
        {"id": assertion_id},
    )


# User Equity Status CRUD operations


async def get_user_equity_status(user_id: str) -> Optional["UserEquityStatus"]:
    """Get user's equity eligibility status"""
    from .models import UserEquityStatus

    row = await db.fetchone(
        """
        SELECT * FROM user_equity_status
        WHERE user_id = :user_id
        """,
        {"user_id": user_id},
    )

    return UserEquityStatus(**row) if row else None


async def create_or_update_user_equity_status(
    data: "CreateUserEquityStatus", granted_by: str
) -> "UserEquityStatus":
    """Create or update user equity eligibility status"""
    from datetime import datetime
    from .models import UserEquityStatus, AccountType
    import uuid

    # Auto-create user-specific equity account if granting eligibility
    if data.is_equity_eligible:
        # Generate equity account name: Equity:User-{user_id}
        equity_account_name = f"Equity:User-{data.user_id[:8]}"

        # Check if the equity account already exists
        equity_account = await get_account_by_name(equity_account_name)

        if not equity_account:
            # Create the user-specific equity account
            await db.execute(
                """
                INSERT INTO accounts (id, name, account_type, description, user_id, created_at)
                VALUES (:id, :name, :type, :description, :user_id, :created_at)
                """,
                {
                    "id": str(uuid.uuid4()),
                    "name": equity_account_name,
                    "type": AccountType.EQUITY.value,
                    "description": f"Equity contributions for user {data.user_id[:8]}",
                    "user_id": data.user_id,
                    "created_at": datetime.now(),
                },
            )

        # Auto-populate equity_account_name in the data
        data.equity_account_name = equity_account_name

    # Check if user already has equity status
    existing = await get_user_equity_status(data.user_id)

    if existing:
        # Update existing record
        await db.execute(
            """
            UPDATE user_equity_status
            SET is_equity_eligible = :is_equity_eligible,
                equity_account_name = :equity_account_name,
                notes = :notes,
                granted_by = :granted_by,
                granted_at = :granted_at,
                revoked_at = :revoked_at
            WHERE user_id = :user_id
            """,
            {
                "user_id": data.user_id,
                "is_equity_eligible": data.is_equity_eligible,
                "equity_account_name": data.equity_account_name,
                "notes": data.notes,
                "granted_by": granted_by,
                "granted_at": datetime.now(),
                "revoked_at": None if data.is_equity_eligible else datetime.now(),
            },
        )
    else:
        # Create new record
        await db.execute(
            """
            INSERT INTO user_equity_status (
                user_id, is_equity_eligible, equity_account_name,
                notes, granted_by, granted_at
            )
            VALUES (
                :user_id, :is_equity_eligible, :equity_account_name,
                :notes, :granted_by, :granted_at
            )
            """,
            {
                "user_id": data.user_id,
                "is_equity_eligible": data.is_equity_eligible,
                "equity_account_name": data.equity_account_name,
                "notes": data.notes,
                "granted_by": granted_by,
                "granted_at": datetime.now(),
            },
        )

    # Return the created/updated record
    result = await get_user_equity_status(data.user_id)
    if not result:
        raise ValueError(f"Failed to create/update equity status for user {data.user_id}")
    return result


async def revoke_user_equity_eligibility(user_id: str) -> Optional["UserEquityStatus"]:
    """Revoke user's equity contribution eligibility"""
    from datetime import datetime

    await db.execute(
        """
        UPDATE user_equity_status
        SET is_equity_eligible = FALSE,
            revoked_at = :revoked_at
        WHERE user_id = :user_id
        """,
        {"user_id": user_id, "revoked_at": datetime.now()},
    )

    return await get_user_equity_status(user_id)


async def get_all_equity_eligible_users() -> list["UserEquityStatus"]:
    """Get all equity-eligible users"""
    from .models import UserEquityStatus

    rows = await db.fetchall(
        """
        SELECT * FROM user_equity_status
        WHERE is_equity_eligible = TRUE
        ORDER BY granted_at DESC
        """
    )

    return [UserEquityStatus(**row) for row in rows]


# ===== ACCOUNT PERMISSION OPERATIONS =====


async def create_account_permission(
    data: "CreateAccountPermission", granted_by: str
) -> "AccountPermission":
    """Create a new account permission"""
    from .models import AccountPermission

    permission_id = urlsafe_short_hash()
    permission = AccountPermission(
        id=permission_id,
        user_id=data.user_id,
        account_id=data.account_id,
        permission_type=data.permission_type,
        granted_by=granted_by,
        granted_at=datetime.now(),
        expires_at=data.expires_at,
        notes=data.notes,
    )

    await db.execute(
        """
        INSERT INTO account_permissions (
            id, user_id, account_id, permission_type, granted_by,
            granted_at, expires_at, notes
        )
        VALUES (
            :id, :user_id, :account_id, :permission_type, :granted_by,
            :granted_at, :expires_at, :notes
        )
        """,
        {
            "id": permission.id,
            "user_id": permission.user_id,
            "account_id": permission.account_id,
            "permission_type": permission.permission_type.value,
            "granted_by": permission.granted_by,
            "granted_at": permission.granted_at,
            "expires_at": permission.expires_at,
            "notes": permission.notes,
        },
    )

    return permission


async def get_account_permission(permission_id: str) -> Optional["AccountPermission"]:
    """Get account permission by ID"""
    from .models import AccountPermission, PermissionType

    row = await db.fetchone(
        "SELECT * FROM account_permissions WHERE id = :id",
        {"id": permission_id},
    )

    if not row:
        return None

    return AccountPermission(
        id=row["id"],
        user_id=row["user_id"],
        account_id=row["account_id"],
        permission_type=PermissionType(row["permission_type"]),
        granted_by=row["granted_by"],
        granted_at=row["granted_at"],
        expires_at=row["expires_at"],
        notes=row["notes"],
    )


async def get_user_permissions(
    user_id: str, permission_type: Optional["PermissionType"] = None
) -> list["AccountPermission"]:
    """Get all permissions for a specific user"""
    from .models import AccountPermission, PermissionType

    if permission_type:
        rows = await db.fetchall(
            """
            SELECT * FROM account_permissions
            WHERE user_id = :user_id
            AND permission_type = :permission_type
            AND (expires_at IS NULL OR expires_at > :now)
            ORDER BY granted_at DESC
            """,
            {
                "user_id": user_id,
                "permission_type": permission_type.value,
                "now": datetime.now(),
            },
        )
    else:
        rows = await db.fetchall(
            """
            SELECT * FROM account_permissions
            WHERE user_id = :user_id
            AND (expires_at IS NULL OR expires_at > :now)
            ORDER BY granted_at DESC
            """,
            {"user_id": user_id, "now": datetime.now()},
        )

    return [
        AccountPermission(
            id=row["id"],
            user_id=row["user_id"],
            account_id=row["account_id"],
            permission_type=PermissionType(row["permission_type"]),
            granted_by=row["granted_by"],
            granted_at=row["granted_at"],
            expires_at=row["expires_at"],
            notes=row["notes"],
        )
        for row in rows
    ]


async def get_account_permissions(account_id: str) -> list["AccountPermission"]:
    """Get all permissions for a specific account"""
    from .models import AccountPermission, PermissionType

    rows = await db.fetchall(
        """
        SELECT * FROM account_permissions
        WHERE account_id = :account_id
        AND (expires_at IS NULL OR expires_at > :now)
        ORDER BY granted_at DESC
        """,
        {"account_id": account_id, "now": datetime.now()},
    )

    return [
        AccountPermission(
            id=row["id"],
            user_id=row["user_id"],
            account_id=row["account_id"],
            permission_type=PermissionType(row["permission_type"]),
            granted_by=row["granted_by"],
            granted_at=row["granted_at"],
            expires_at=row["expires_at"],
            notes=row["notes"],
        )
        for row in rows
    ]


async def delete_account_permission(permission_id: str) -> None:
    """Delete (revoke) an account permission"""
    await db.execute(
        "DELETE FROM account_permissions WHERE id = :id",
        {"id": permission_id},
    )


async def check_user_has_permission(
    user_id: str, account_id: str, permission_type: "PermissionType"
) -> bool:
    """Check if user has a specific permission on an account (direct permission only, no inheritance)"""
    row = await db.fetchone(
        """
        SELECT id FROM account_permissions
        WHERE user_id = :user_id
        AND account_id = :account_id
        AND permission_type = :permission_type
        AND (expires_at IS NULL OR expires_at > :now)
        """,
        {
            "user_id": user_id,
            "account_id": account_id,
            "permission_type": permission_type.value,
            "now": datetime.now(),
        },
    )

    return row is not None


async def get_user_permissions_with_inheritance(
    user_id: str, account_name: str, permission_type: "PermissionType"
) -> list[tuple["AccountPermission", Optional[str]]]:
    """
    Get all permissions for a user on an account, including inherited permissions from parent accounts.
    Returns list of tuples: (permission, parent_account_name or None)

    Example:
        If user has permission on "Expenses:Food", they also have permission on "Expenses:Food:Groceries"
        Returns: [(permission_on_food, "Expenses:Food")]
    """
    from .models import AccountPermission, PermissionType

    # Get all user's permissions of this type
    user_permissions = await get_user_permissions(user_id, permission_type)

    # Find which permissions apply to this account (direct or inherited)
    applicable_permissions = []

    for perm in user_permissions:
        # Get the account for this permission
        account = await get_account(perm.account_id)
        if not account:
            continue

        # Check if this account is a parent of the target account
        # Parent accounts are indicated by hierarchical names (colon-separated)
        # e.g., "Expenses:Food" is parent of "Expenses:Food:Groceries"
        if account_name == account.name:
            # Direct permission
            applicable_permissions.append((perm, None))
        elif account_name.startswith(account.name + ":"):
            # Inherited permission from parent account
            applicable_permissions.append((perm, account.name))

    return applicable_permissions