"""Add briefing tables: rss_feeds, rss_items, weather_cache, conversation briefing columns."""

from alembic import op

revision = "0026"
down_revision = "0025"


def upgrade() -> None:
    # Extend conversations table
    op.execute("""
        ALTER TABLE conversations
            ADD COLUMN IF NOT EXISTS conversation_type TEXT NOT NULL DEFAULT 'chat',
            ADD COLUMN IF NOT EXISTS briefing_date DATE
    """)
    op.execute("CREATE INDEX IF NOT EXISTS ix_conversations_type ON conversations(conversation_type)")

    # RSS feeds
    op.execute("""
        CREATE TABLE IF NOT EXISTS rss_feeds (
            id              SERIAL PRIMARY KEY,
            user_id         INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            url             TEXT NOT NULL,
            title           TEXT NOT NULL DEFAULT '',
            category        TEXT,
            last_fetched_at TIMESTAMPTZ,
            CONSTRAINT uq_rss_feeds_user_url UNIQUE (user_id, url)
        )
    """)
    op.execute("CREATE INDEX IF NOT EXISTS ix_rss_feeds_user_id ON rss_feeds(user_id)")

    # RSS items
    op.execute("""
        CREATE TABLE IF NOT EXISTS rss_items (
            id           SERIAL PRIMARY KEY,
            feed_id      INTEGER NOT NULL REFERENCES rss_feeds(id) ON DELETE CASCADE,
            guid         TEXT NOT NULL,
            title        TEXT NOT NULL DEFAULT '',
            url          TEXT NOT NULL DEFAULT '',
            published_at TIMESTAMPTZ,
            content      TEXT NOT NULL DEFAULT '',
            fetched_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
            CONSTRAINT uq_rss_items_feed_guid UNIQUE (feed_id, guid)
        )
    """)
    op.execute("CREATE INDEX IF NOT EXISTS ix_rss_items_feed_id ON rss_items(feed_id)")
    op.execute("CREATE INDEX IF NOT EXISTS ix_rss_items_published_at ON rss_items(published_at)")

    # Weather cache
    op.execute("""
        CREATE TABLE IF NOT EXISTS weather_cache (
            id             SERIAL PRIMARY KEY,
            user_id        INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            location_key   TEXT NOT NULL,
            location_label TEXT NOT NULL DEFAULT '',
            forecast_json  JSONB,
            previous_json  JSONB,
            fetched_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
            CONSTRAINT uq_weather_cache_user_location UNIQUE (user_id, location_key)
        )
    """)
    op.execute("CREATE INDEX IF NOT EXISTS ix_weather_cache_user_id ON weather_cache(user_id)")


def downgrade() -> None:
    op.execute("DROP INDEX IF EXISTS ix_weather_cache_user_id")
    op.execute("DROP TABLE IF EXISTS weather_cache")
    op.execute("DROP INDEX IF EXISTS ix_rss_items_published_at")
    op.execute("DROP INDEX IF EXISTS ix_rss_items_feed_id")
    op.execute("DROP TABLE IF EXISTS rss_items")
    op.execute("DROP INDEX IF EXISTS ix_rss_feeds_user_id")
    op.execute("DROP TABLE IF EXISTS rss_feeds")
    op.execute("DROP INDEX IF EXISTS ix_conversations_type")
    op.execute("ALTER TABLE conversations DROP COLUMN IF EXISTS briefing_date")
    op.execute("ALTER TABLE conversations DROP COLUMN IF EXISTS conversation_type")