CREATE TABLE IF NOT EXISTS schema_version (
    version     INTEGER PRIMARY KEY,
    applied_at  TEXT NOT NULL DEFAULT (datetime('now')),
    description TEXT
);

CREATE TABLE IF NOT EXISTS volumes (
    id          TEXT PRIMARY KEY,
    name        TEXT NOT NULL,
    description TEXT DEFAULT '',
    sort_order  INTEGER NOT NULL DEFAULT 0,
    created_at  TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at  TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS chapters (
    id          TEXT PRIMARY KEY,
    volume_id   TEXT,
    title       TEXT NOT NULL DEFAULT '',
    content     TEXT NOT NULL DEFAULT '',
    status      TEXT NOT NULL DEFAULT 'draft',
    word_count  INTEGER NOT NULL DEFAULT 0,
    sort_order  INTEGER NOT NULL DEFAULT 0,
    cursor_offset INTEGER DEFAULT 0,
    created_at  TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at  TEXT NOT NULL DEFAULT (datetime('now')),
    FOREIGN KEY (volume_id) REFERENCES volumes(id) ON DELETE SET NULL
);