create table users (
    id            bigserial primary key,
    name          text        not null,
    email         text        not null unique,
    password_hash text        not null,
    avatar        text,
    banned        boolean     not null default false,
    created_at    timestamptz not null default now()
);

create table sessions (
    token      text        primary key,
    user_id    bigint      not null references users (id) on delete cascade,
    idle_ttl   interval    not null,
    expires_at timestamptz not null,
    created_at timestamptz not null default now()
);

create index on sessions (user_id);

create table invites (
    id         bigserial   primary key,
    code       text        not null unique,
    is_valid   boolean     not null default true,
    created_at timestamptz not null default now()
);

create table songs (
    id               bigserial   primary key,
    title            text        not null,
    artist           text        not null,
    genre            text        not null,
    description      text,
    -- LRC or plain text, told apart by whether the first line starts with '['. Not covered by the
    -- lock: nobody reviewed the lyrics.
    lyrics           text,
    audio_file       text        not null,
    duration_seconds integer     not null,
    source_url       text,
    submitted_by     bigint      not null references users (id),
    created_at       timestamptz not null default now()
);

create index on songs (created_at desc);

create table submissions (
    id          bigserial   primary key,
    user_id     bigint      not null references users (id) on delete cascade,
    status      text        not null default 'queued',
    status_msg  text,
    source_url  text,
    tmp_path    text,
    title       text,
    artist      text,
    genre       text,
    description text,
    lyrics      text,
    created_at  timestamptz not null default now(),
    constraint submissions_status check (
        status in ('queued', 'downloading', 'converting', 'ready', 'failed')
    )
);

-- The submission quota (5 per rolling 24h, failures excluded) reads this.
create index on submissions (user_id, created_at desc);

create table reviews (
    id          bigserial   primary key,
    song_id     bigint      not null references songs (id) on delete cascade,
    reviewer_id bigint      not null references users (id),
    score       integer     not null check (score between 1 and 100),
    text        text        not null,
    created_at  timestamptz not null default now(),
    updated_at  timestamptz not null default now(),
    unique (song_id, reviewer_id)
);

create index on reviews (song_id);

-- The queue asks "songs this member has not reviewed" — that lookup is by reviewer.
create index on reviews (reviewer_id, song_id);

create table reports (
    id          bigserial   primary key,
    user_id     bigint      not null references users (id) on delete cascade,
    body        text        not null,
    page        text,
    user_agent  text,
    resolved_at timestamptz,
    created_at  timestamptz not null default now()
);