-- =============================================================
-- Canteen Menu – Initiales Schema (selbst gehostet, ohne Supabase)
-- Rollen: admin (Benutzerverwaltung, Branding) / staff (Kantine)
-- Öffentliche Speisekarte: lesbar ohne Login
-- =============================================================

-- ---------- Benutzer & Authentifizierung ----------
create table users (
  id                     uuid primary key default gen_random_uuid(),
  email                  text not null unique,
  password_hash          text not null,
  full_name              text not null default '',
  role                   text not null default 'staff' check (role in ('admin', 'staff')),
  password_auth_enabled  boolean not null default true,
  created_at             timestamptz not null default now()
);

-- Angemeldete Sitzungen. Es wird nur der Hash des Tokens gespeichert –
-- der Rohwert im Cookie ist damit auch bei einem DB-Zugriff allein nicht
-- verwendbar.
create table sessions (
  token_hash    text primary key,
  user_id       uuid not null references users (id) on delete cascade,
  created_at    timestamptz not null default now(),
  expires_at    timestamptz not null,
  last_seen_at  timestamptz not null default now()
);
create index sessions_user_id_idx on sessions (user_id);

-- WebAuthn-Credentials (ersetzt Supabase's internes, für die App bisher
-- unsichtbares Passkey-Schema).
create table passkey_credentials (
  id             uuid primary key default gen_random_uuid(),
  user_id        uuid not null references users (id) on delete cascade,
  credential_id  text not null unique,
  public_key     bytea not null,
  counter        bigint not null default 0,
  transports     text[] not null default '{}',
  name           text,
  created_at     timestamptz not null default now(),
  last_used_at   timestamptz
);
create index passkey_credentials_user_id_idx on passkey_credentials (user_id);

-- Kurzlebige Challenges für laufende WebAuthn-Zeremonien (Registrierung
-- oder Login). user_id ist beim Login-Flow anfangs null (Discoverable-
-- Credential-Ansatz: die Identität steht erst nach der Antwort fest).
create table webauthn_challenges (
  id          uuid primary key default gen_random_uuid(),
  user_id     uuid references users (id) on delete cascade,
  challenge   text not null,
  type        text not null check (type in ('registration', 'authentication')),
  expires_at  timestamptz not null,
  created_at  timestamptz not null default now()
);

-- ---------- Essenszeiten der Speisekarte ----------
create table sections (
  key        text primary key default (gen_random_uuid())::text,
  label      text not null,
  label_en   text,
  label_pl   text,
  time_range text not null,
  sort       int  not null
);

-- ---------- Allergene & Zusatzstoffe ----------
create table allergens (
  code    text primary key,
  name    text not null,
  name_en text,
  name_pl text,
  sort    int  not null default 0
);

create table additives (
  code    text primary key,
  name    text not null,
  name_en text,
  name_pl text,
  sort    int  not null default 0
);

-- ---------- Gerichte ----------
create table dishes (
  id         uuid primary key default gen_random_uuid(),
  name       text not null,
  name_en    text,
  name_pl    text,
  price      numeric(6, 2) not null default 0,
  allergens  text[] not null default '{}',
  additives  text[] not null default '{}',
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create or replace function touch_updated_at()
returns trigger
language plpgsql
as $$
begin
  new.updated_at := now();
  return new;
end;
$$;

create trigger dishes_touch_updated_at
  before update on dishes
  for each row execute function touch_updated_at();

-- ---------- Zuweisung Gericht -> Tag/Essenszeit ----------
create table menu_entries (
  id          uuid primary key default gen_random_uuid(),
  menu_date   date not null,
  section_key text not null references sections (key) on delete cascade,
  dish_id     uuid not null references dishes (id) on delete cascade,
  position    int  not null default 0,
  created_at  timestamptz not null default now(),
  unique (menu_date, section_key, dish_id)
);
create index menu_entries_date_idx on menu_entries (menu_date);

-- ---------- Einstellungen (Farben, Logo, Favicon) – genau eine Zeile ----------
create table settings (
  id           int primary key check (id = 1),
  colors       jsonb not null default '{}'::jsonb,
  logo_path    text,
  favicon_path text,
  updated_at   timestamptz not null default now()
);

insert into settings (id, colors) values (
  1,
  '{
    "primary":    "#003388",
    "primaryDark": "#0d315c",
    "accent":     "#ff6900",
    "headerText": "#ffffff",
    "rowBg":      "#e3e4f1",
    "rowBgAlt":   "#f4f4fa",
    "addBtn":     "#6da54c",
    "deleteBtn":  "#e2371d"
  }'::jsonb
);

create trigger settings_touch_updated_at
  before update on settings
  for each row execute function touch_updated_at();

-- ---------- Rezeptvorschläge ----------
create table dish_suggestions (
  id          uuid primary key default gen_random_uuid(),
  name        text not null,
  description text,
  created_at  timestamptz not null default now()
);