-- SQLite-specific schema with INTEGER timestamps
-- Main content table (current versions only)
CREATE TABLE content (
    id TEXT NOT NULL,
    site_id TEXT NOT NULL,
    value TEXT NOT NULL,
    type TEXT NOT NULL,
    created_at INTEGER DEFAULT (strftime('%s', 'now')) NOT NULL,
    updated_at INTEGER DEFAULT (strftime('%s', 'now')) NOT NULL,
    last_edited_by TEXT DEFAULT 'system' NOT NULL,
    PRIMARY KEY (id, site_id)
);

-- Version history table for rollback functionality
CREATE TABLE content_versions (
    version_id INTEGER PRIMARY KEY AUTOINCREMENT,
    content_id TEXT NOT NULL,
    site_id TEXT NOT NULL,
    value TEXT NOT NULL,
    type TEXT NOT NULL,
    created_at INTEGER DEFAULT (strftime('%s', 'now')) NOT NULL,
    created_by TEXT DEFAULT 'system' NOT NULL
);

-- Indexes for performance
CREATE INDEX IF NOT EXISTS idx_content_site_id ON content(site_id);
CREATE INDEX IF NOT EXISTS idx_content_updated_at ON content(updated_at);
CREATE INDEX IF NOT EXISTS idx_content_versions_lookup ON content_versions(content_id, site_id, created_at DESC);

-- Trigger to automatically update updated_at timestamp
CREATE TRIGGER IF NOT EXISTS update_content_updated_at
AFTER UPDATE ON content
FOR EACH ROW
BEGIN
    UPDATE content SET updated_at = strftime('%s', 'now') WHERE id = NEW.id AND site_id = NEW.site_id;
END;