-- Core library schema per spec §5. Dual-like, session, scrobble, and
-- similarity tables land with their respective feature milestones.

CREATE EXTENSION IF NOT EXISTS "pgcrypto";

CREATE TABLE artists (
    id         uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    name       text NOT NULL,
    sort_name  text NOT NULL,
    mbid       text,
    created_at timestamptz NOT NULL DEFAULT now(),
    updated_at timestamptz NOT NULL DEFAULT now()
);
CREATE UNIQUE INDEX artists_mbid_unique ON artists (mbid) WHERE mbid IS NOT NULL;
CREATE INDEX artists_sort_name ON artists (sort_name);

CREATE TABLE albums (
    id             uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    title          text NOT NULL,
    sort_title     text NOT NULL,
    artist_id      uuid NOT NULL REFERENCES artists (id) ON DELETE CASCADE,
    release_date   date,
    mbid           text,
    cover_art_path text,
    created_at     timestamptz NOT NULL DEFAULT now(),
    updated_at     timestamptz NOT NULL DEFAULT now()
);
CREATE UNIQUE INDEX albums_mbid_unique ON albums (mbid) WHERE mbid IS NOT NULL;
CREATE INDEX albums_artist ON albums (artist_id);
CREATE INDEX albums_sort_title ON albums (sort_title);

CREATE TABLE tracks (
    id           uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    title        text NOT NULL,
    album_id     uuid NOT NULL REFERENCES albums (id) ON DELETE CASCADE,
    artist_id    uuid NOT NULL REFERENCES artists (id) ON DELETE CASCADE,
    track_number integer,
    disc_number  integer,
    duration_ms  integer NOT NULL,
    file_path    text NOT NULL UNIQUE,
    file_size    bigint NOT NULL,
    file_format  text NOT NULL,
    bitrate      integer,
    mbid         text,
    genre        text,
    added_at     timestamptz NOT NULL DEFAULT now(),
    updated_at   timestamptz NOT NULL DEFAULT now()
);
CREATE UNIQUE INDEX tracks_mbid_unique ON tracks (mbid) WHERE mbid IS NOT NULL;
CREATE INDEX tracks_album ON tracks (album_id, disc_number, track_number);
CREATE INDEX tracks_artist ON tracks (artist_id);

CREATE TABLE users (
    id            uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    username      text NOT NULL UNIQUE,
    password_hash text NOT NULL,
    api_token     text NOT NULL UNIQUE,
    is_admin      boolean NOT NULL DEFAULT false,
    created_at    timestamptz NOT NULL DEFAULT now()
);