-- AppView database schema (initial)

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- =====================================================
-- posts
-- =====================================================
CREATE TABLE posts (
    uri            TEXT PRIMARY KEY,                     -- at://did/rkey/app.twi.post
    did            TEXT NOT NULL,
    handle         TEXT NOT NULL,
    rkey           TEXT NOT NULL,
    collection     TEXT NOT NULL,                        -- app.twi.post | app.bsky.feed.post
    text           TEXT NOT NULL,
    cid            TEXT NOT NULL,
    parent_uri     TEXT,                                 -- reply parent
    root_uri       TEXT,                                 -- thread root
    langs          TEXT[],
    indexed_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
    created_at     TIMESTAMPTZ NOT NULL
);
CREATE INDEX posts_did_idx ON posts (did);
CREATE INDEX posts_created_at_idx ON posts (created_at DESC);
CREATE INDEX posts_collection_idx ON posts (collection);
CREATE INDEX posts_parent_idx ON posts (parent_uri) WHERE parent_uri IS NOT NULL;
CREATE INDEX posts_root_idx ON posts (root_uri) WHERE root_uri IS NOT NULL;

-- =====================================================
-- likes
-- =====================================================
CREATE TABLE likes (
    uri            TEXT PRIMARY KEY,
    did            TEXT NOT NULL,
    post_uri       TEXT NOT NULL,
    post_cid       TEXT NOT NULL,
    created_at     TIMESTAMPTZ NOT NULL,
    indexed_at     TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE INDEX likes_post_idx ON likes (post_uri);
CREATE INDEX likes_did_idx ON likes (did);

-- =====================================================
-- reposts
-- =====================================================
CREATE TABLE reposts (
    uri            TEXT PRIMARY KEY,
    did            TEXT NOT NULL,
    post_uri       TEXT NOT NULL,
    post_cid       TEXT NOT NULL,
    created_at     TIMESTAMPTZ NOT NULL,
    indexed_at     TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE INDEX reposts_post_idx ON reposts (post_uri);
CREATE INDEX reposts_did_idx ON reposts (did);

-- =====================================================
-- follows
-- =====================================================
CREATE TABLE follows (
    follower_did   TEXT NOT NULL,
    subject_did    TEXT NOT NULL,
    created_at     TIMESTAMPTZ NOT NULL,
    indexed_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (follower_did, subject_did)
);
CREATE INDEX follows_subject_idx ON follows (subject_did);

-- =====================================================
-- timeline cache (materialized per-user timelines)
-- =====================================================
CREATE TABLE timeline_cache (
    did            TEXT NOT NULL,
    post_uri       TEXT NOT NULL,
    score          DOUBLE PRECISION NOT NULL,
    ranked_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (did, post_uri)
);
CREATE INDEX timeline_did_score_idx ON timeline_cache (did, score DESC, ranked_at DESC);

-- =====================================================
-- search (simple trigram)
-- =====================================================
CREATE EXTENSION IF NOT EXISTS pg_trgm;
CREATE INDEX posts_text_trgm_idx ON posts USING GIN (text gin_trgm_ops);

-- =====================================================
-- jetstream cursor
-- =====================================================
CREATE TABLE jetstream_cursor (
    id             INTEGER PRIMARY KEY DEFAULT 1 CHECK (id = 1),
    cursor         BIGINT NOT NULL DEFAULT 0,
    updated_at     TIMESTAMPTZ NOT NULL DEFAULT now()
);
INSERT INTO jetstream_cursor (id, cursor) VALUES (1, 0);