CREATE TABLE IF NOT EXISTS fee_structures (
    id CHAR(36) NOT NULL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    academic_year VARCHAR(50) NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'Draft' CHECK (status IN ('Draft', 'Active', 'Archived')),
    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP NOT NULL DEFAULT NOW()
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE IF NOT EXISTS fee_structure_lines (
    id CHAR(36) NOT NULL PRIMARY KEY,
    fee_structure_id CHAR(36) NOT NULL,
    description VARCHAR(255) NOT NULL,
    amount DECIMAL(10, 2) NOT NULL,
    revenue_account_id CHAR(36) NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
    FOREIGN KEY (fee_structure_id) REFERENCES fee_structures(id) ON DELETE CASCADE,
    FOREIGN KEY (revenue_account_id) REFERENCES accounts(id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;