async def m001_initial(db):
    """
    Initial migration for Castle accounting extension.
    Creates tables for double-entry bookkeeping system.
    """
    await db.execute(
        f"""
        CREATE TABLE accounts (
            id TEXT PRIMARY KEY,
            name TEXT NOT NULL,
            account_type TEXT NOT NULL,
            description TEXT,
            user_id TEXT,
            created_at TIMESTAMP NOT NULL DEFAULT {db.timestamp_now}
        );
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_accounts_user_id ON accounts (user_id);
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_accounts_type ON accounts (account_type);
        """
    )

    await db.execute(
        f"""
        CREATE TABLE journal_entries (
            id TEXT PRIMARY KEY,
            description TEXT NOT NULL,
            entry_date TIMESTAMP NOT NULL,
            created_by TEXT NOT NULL,
            created_at TIMESTAMP NOT NULL DEFAULT {db.timestamp_now},
            reference TEXT
        );
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_journal_entries_created_by ON journal_entries (created_by);
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_journal_entries_date ON journal_entries (entry_date);
        """
    )

    await db.execute(
        f"""
        CREATE TABLE entry_lines (
            id TEXT PRIMARY KEY,
            journal_entry_id TEXT NOT NULL,
            account_id TEXT NOT NULL,
            debit INTEGER NOT NULL DEFAULT 0,
            credit INTEGER NOT NULL DEFAULT 0,
            description TEXT,
            metadata TEXT DEFAULT '{{}}'
        );
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_entry_lines_journal_entry ON entry_lines (journal_entry_id);
        """
    )

    await db.execute(
        """
        CREATE INDEX idx_entry_lines_account ON entry_lines (account_id);
        """
    )

    # Insert default chart of accounts
    default_accounts = [
        # Assets
        ("cash", "Cash", "asset", "Cash on hand"),
        ("bank", "Bank Account", "asset", "Bank account"),
        ("lightning", "Lightning Balance", "asset", "Lightning Network balance"),
        ("accounts_receivable", "Accounts Receivable", "asset", "Money owed to the Castle"),

        # Liabilities
        ("accounts_payable", "Accounts Payable", "liability", "Money owed by the Castle"),

        # Equity
        ("member_equity", "Member Equity", "equity", "Member contributions"),
        ("retained_earnings", "Retained Earnings", "equity", "Accumulated profits"),

        # Revenue
        ("accommodation_revenue", "Accommodation Revenue", "revenue", "Revenue from stays"),
        ("service_revenue", "Service Revenue", "revenue", "Revenue from services"),
        ("other_revenue", "Other Revenue", "revenue", "Other revenue"),

        # Expenses
        ("utilities", "Utilities", "expense", "Electricity, water, internet"),
        ("food", "Food & Supplies", "expense", "Food and supplies"),
        ("maintenance", "Maintenance", "expense", "Repairs and maintenance"),
        ("other_expense", "Other Expenses", "expense", "Miscellaneous expenses"),
    ]

    for acc_id, name, acc_type, desc in default_accounts:
        await db.execute(
            """
            INSERT INTO accounts (id, name, account_type, description)
            VALUES (:id, :name, :type, :description)
            """,
            {"id": acc_id, "name": name, "type": acc_type, "description": desc}
        )