-- Article pipeline: track articles from discovery through posting
CREATE TABLE IF NOT EXISTS official_account_articles (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    config_id UUID NOT NULL REFERENCES official_account_configs(id) ON DELETE CASCADE,
    guid TEXT NOT NULL,                -- unique article ID (Google News URL or RSS GUID)
    title TEXT NOT NULL DEFAULT '',
    link TEXT NOT NULL,                -- resolved URL (what gets posted)
    source_name TEXT NOT NULL DEFAULT '',
    source_url TEXT NOT NULL DEFAULT '',
    description TEXT NOT NULL DEFAULT '',
    pub_date TIMESTAMPTZ,
    status TEXT NOT NULL DEFAULT 'discovered',  -- discovered | posted | failed | skipped
    post_id UUID REFERENCES public.posts(id) ON DELETE SET NULL,
    error_message TEXT,
    discovered_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    posted_at TIMESTAMPTZ,

    CONSTRAINT unique_article_guid_per_config UNIQUE (config_id, guid)
);

CREATE INDEX IF NOT EXISTS idx_oaa_config_status ON official_account_articles(config_id, status);
CREATE INDEX IF NOT EXISTS idx_oaa_discovered ON official_account_articles(discovered_at DESC);
CREATE INDEX IF NOT EXISTS idx_oaa_guid ON official_account_articles(guid);

-- Migrate existing posted articles into the new table
INSERT INTO official_account_articles (config_id, guid, title, link, source_name, status, post_id, discovered_at, posted_at)
SELECT config_id, article_url, article_title, article_url, source_name, 'posted', post_id, posted_at, posted_at
FROM official_account_posted_articles
ON CONFLICT (config_id, guid) DO NOTHING;