-- RIOTZ SUPABASE DATABASE SCHEMA
-- Tech Stack: PostgreSQL, Supabase Auth, Storage

-- 1. EXTENSIONS
create extension if not exists "uuid-ossp";

-- 2. TABLES

-- PROFILES: Core user identity
create table public.profiles (
  user_id uuid references auth.users on delete cascade primary key,
  username text unique not null,
  bio text,
  avatar_url text,
  featured boolean default false,
  banned boolean default false,
  created_at timestamp with time zone default now(),
  updated_at timestamp with time zone default now()
);

-- POSTS: Visual manifestations
create table public.posts (
  id uuid default uuid_generate_v4() primary key,
  user_id uuid references public.profiles(user_id) on delete cascade not null,
  image_url text not null,
  caption text,
  likes_count int default 0,
  featured boolean default false,
  created_at timestamp with time zone default now()
);

-- POST LIKES: Engagement tracking
create table public.post_likes (
  user_id uuid references public.profiles(user_id) on delete cascade not null,
  post_id uuid references public.posts(id) on delete cascade not null,
  created_at timestamp with time zone default now(),
  primary key (user_id, post_id)
);

-- TRACKS: Sonic broadcasts
create table public.tracks (
  id uuid default uuid_generate_v4() primary key,
  user_id uuid references public.profiles(user_id) on delete cascade not null,
  title text not null,
  audio_url text not null,
  genre_tag text default 'UNKNOWN',
  plays int default 0,
  featured boolean default false,
  created_at timestamp with time zone default now()
);

-- COMMENTS: Chaos discourse
create table public.comments (
  id uuid default uuid_generate_v4() primary key,
  post_id uuid references public.posts(id) on delete cascade not null,
  user_id uuid references public.profiles(user_id) on delete cascade not null,
  content text not null,
  created_at timestamp with time zone default now()
);

-- BANS: Network exclusion records
create table public.bans (
  id uuid default uuid_generate_v4() primary key,
  user_id uuid references public.profiles(user_id) on delete cascade not null,
  reason text,
  banned_by uuid references public.profiles(user_id),
  created_at timestamp with time zone default now()
);

-- FEATURED CONTENT: Curated highlights
create table public.featured_content (
  id uuid default uuid_generate_v4() primary key,
  content_type text not null check (content_type in ('artist', 'post', 'track')),
  content_id uuid not null,
  priority int default 0,
  created_at timestamp with time zone default now()
);

-- 3. FUNCTIONS & TRIGGERS

-- Automatically create profile on signup
create or replace function public.handle_new_user()
returns trigger as $$
begin
  insert into public.profiles (user_id, username, avatar_url)
  values (new.id, split_part(new.email, '@', 1), new.raw_user_meta_data->>'avatar_url');
  return new;
end;
$$ language plpgsql security definer;

create trigger on_auth_user_created
  after insert on auth.users
  for each row execute procedure public.handle_new_user();

-- Auto-update likes_count on posts
create or replace function public.update_post_likes_count()
returns trigger as $$
begin
  if (TG_OP = 'INSERT') then
    update public.posts set likes_count = likes_count + 1 where id = new.post_id;
  elsif (TG_OP = 'DELETE') then
    update public.posts set likes_count = likes_count - 1 where id = old.post_id;
  end if;
  return null;
end;
$$ language plpgsql security definer;

create trigger on_like_changed
  after insert or delete on public.post_likes
  for each row execute procedure public.update_post_likes_count();

-- Increment plays RPC
create or replace function public.increment_track_plays(track_id uuid)
returns void as $$
begin
  update public.tracks set plays = plays + 1 where id = track_id;
end;
$$ language plpgsql security definer;

-- 4. SECURITY (RLS)

alter table public.profiles enable row level security;
alter table public.posts enable row level security;
alter table public.tracks enable row level security;
alter table public.post_likes enable row level security;
alter table public.comments enable row level security;

-- Profiles: Public read, owner update
create policy "Public profiles are viewable by everyone." on public.profiles for select using (true);
create policy "Users can update own profile." on public.profiles for update using (auth.uid() = user_id);

-- Posts: Public read, Auth create, Owner delete
create policy "Posts are viewable by everyone." on public.posts for select using (true);
create policy "Authenticated users can create posts." on public.posts for insert with check (auth.role() = 'authenticated');
create policy "Users can delete own posts." on public.posts for delete using (auth.uid() = user_id);

-- Tracks: Public read, Auth create
create policy "Tracks are viewable by everyone." on public.tracks for select using (true);
create policy "Authenticated users can upload tracks." on public.tracks for insert with check (auth.role() = 'authenticated');

-- Likes: Authenticated management
create policy "Users can view likes." on public.post_likes for select using (true);
create policy "Users can manage own likes." on public.post_likes for all using (auth.uid() = user_id);

-- 5. INDEXES for Performance
create index idx_posts_user_id on public.posts(user_id);
create index idx_posts_created_at on public.posts(created_at desc);
create index idx_tracks_plays on public.tracks(plays desc);
create index idx_comments_post_id on public.comments(post_id);