CREATE TABLE IF NOT EXISTS drafts (
    id TEXT PRIMARY KEY,
    to_addresses TEXT NOT NULL DEFAULT '',
    cc_addresses TEXT NOT NULL DEFAULT '',
    bcc_addresses TEXT NOT NULL DEFAULT '',
    subject TEXT NOT NULL DEFAULT '',
    text_body TEXT NOT NULL DEFAULT '',
    html_body TEXT,
    in_reply_to TEXT,
    references_header TEXT,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS draft_attachments (
    id TEXT PRIMARY KEY,
    draft_id TEXT NOT NULL,
    filename TEXT NOT NULL,
    content_type TEXT NOT NULL,
    size INTEGER NOT NULL,
    file_path TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    FOREIGN KEY (draft_id) REFERENCES drafts(id) ON DELETE CASCADE
);