-- Drop kanban template scaffold.
DROP TABLE IF EXISTS kanban_card;

-- Seminarhof Drawehn core schema.
-- Multi-tenant from day one (venue_id on every domain row).
-- All money stored as integer cents (euro_cents) to avoid float drift.

-- ─────────────────────────────────────────────────────────────────────
-- Tenancy

CREATE TABLE IF NOT EXISTS venue (
  venue_id        TEXT PRIMARY KEY,
  name            TEXT NOT NULL,
  slug            TEXT NOT NULL UNIQUE,
  locale_default  TEXT NOT NULL DEFAULT 'de',
  meal_window_breakfast TEXT NOT NULL DEFAULT '07:00-10:00',
  meal_window_lunch     TEXT NOT NULL DEFAULT '12:00-14:00',
  meal_window_dinner    TEXT NOT NULL DEFAULT '18:00-20:00',
  created_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

-- ─────────────────────────────────────────────────────────────────────
-- Identity

CREATE TABLE IF NOT EXISTS app_user (
  user_id         TEXT PRIMARY KEY,
  email           TEXT NOT NULL UNIQUE,
  name            TEXT NOT NULL,
  locale          TEXT NOT NULL DEFAULT 'de',
  role            TEXT NOT NULL,        -- 'admin' | 'client' | 'owner'
  created_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS client (
  client_id       TEXT PRIMARY KEY,
  venue_id        TEXT NOT NULL REFERENCES venue(venue_id),
  name            TEXT,
  is_stammgruppe  INTEGER NOT NULL DEFAULT 0,
  billing_address TEXT,
  contact_email   TEXT,
  contact_phone   TEXT,
  website         TEXT,
  notes           TEXT,
  created_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS client_member (
  client_id       TEXT NOT NULL REFERENCES client(client_id),
  user_id         TEXT NOT NULL REFERENCES app_user(user_id),
  role            TEXT NOT NULL DEFAULT 'organiser',  -- 'organiser' | 'colleague'
  PRIMARY KEY (client_id, user_id)
);

-- ─────────────────────────────────────────────────────────────────────
-- Physical inventory

CREATE TABLE IF NOT EXISTS bathroom (
  bathroom_id     TEXT PRIMARY KEY,
  venue_id        TEXT NOT NULL REFERENCES venue(venue_id),
  label           TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS room (
  room_id           TEXT PRIMARY KEY,
  venue_id          TEXT NOT NULL REFERENCES venue(venue_id),
  number            INTEGER NOT NULL,
  beds              INTEGER NOT NULL,
  room_type         TEXT NOT NULL,    -- 'MBZ' | 'DZ' | 'EZ_only'
  building          TEXT NOT NULL,    -- 'gaestehaus' | 'haupthaus'
  floor             TEXT NOT NULL,    -- 'eg' | 'og'
  bathroom_id       TEXT REFERENCES bathroom(bathroom_id),
  wheelchair        INTEGER NOT NULL DEFAULT 0,
  ground_floor      INTEGER NOT NULL DEFAULT 0,
  quiet             INTEGER NOT NULL DEFAULT 0,
  shared_bath       INTEGER NOT NULL DEFAULT 0,
  dogs_allowed      INTEGER NOT NULL DEFAULT 0,
  double_bed_140    INTEGER NOT NULL DEFAULT 0,
  allergy_friendly  INTEGER NOT NULL DEFAULT 0,
  surcharge_eur_cents INTEGER NOT NULL DEFAULT 0,
  UNIQUE (venue_id, number)
);

CREATE TABLE IF NOT EXISTS seminar_room (
  seminar_room_id TEXT PRIMARY KEY,
  venue_id        TEXT NOT NULL REFERENCES venue(venue_id),
  name            TEXT NOT NULL
);

-- ─────────────────────────────────────────────────────────────────────
-- Bookings

CREATE TABLE IF NOT EXISTS booking (
  booking_id      TEXT PRIMARY KEY,
  venue_id        TEXT NOT NULL REFERENCES venue(venue_id),
  client_id       TEXT NOT NULL REFERENCES client(client_id),
  event_name      TEXT NOT NULL,
  start_date      TEXT,
  end_date        TEXT,
  status          TEXT NOT NULL,    -- enquiry | form_received | reserved | deposit_paid | confirmed | ended | cancelled
  half_house      INTEGER NOT NULL DEFAULT 0,
  online_ad       INTEGER NOT NULL DEFAULT 0,
  cover_image_url TEXT,
  short_description TEXT,
  organiser_website TEXT,
  expected_persons INTEGER,
  meal_time_breakfast TEXT,
  meal_time_lunch     TEXT,
  meal_time_dinner    TEXT,
  daily_plan      TEXT,
  arrival_time    TEXT,
  departure_time  TEXT,
  payment_method  TEXT NOT NULL DEFAULT 'transfer',  -- 'cash' | 'transfer'
  agb_year        INTEGER,
  agb_accepted_at TEXT,
  privacy_accepted_at TEXT,
  notes           TEXT,
  created_at      TEXT NOT NULL DEFAULT (datetime('now')),
  updated_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_booking_venue_dates
  ON booking (venue_id, start_date, end_date);
CREATE INDEX IF NOT EXISTS idx_booking_client
  ON booking (client_id);
CREATE INDEX IF NOT EXISTS idx_booking_status
  ON booking (venue_id, status);

CREATE TABLE IF NOT EXISTS booking_extra (
  booking_extra_id TEXT PRIMARY KEY,
  booking_id      TEXT NOT NULL REFERENCES booking(booking_id),
  kind            TEXT NOT NULL,   -- 'cake' | 'second_seminar_room' | 'early_arrival' | 'bedlinen' | 'massage_bench' | 'sauna'
  qty             INTEGER NOT NULL DEFAULT 1,
  on_dates        TEXT,            -- JSON array of dates for cake-day picker
  unit_price_cents INTEGER NOT NULL DEFAULT 0,
  note            TEXT
);

-- ─────────────────────────────────────────────────────────────────────
-- Participants

CREATE TABLE IF NOT EXISTS participant (
  participant_id  TEXT PRIMARY KEY,
  booking_id      TEXT NOT NULL REFERENCES booking(booking_id),
  name            TEXT NOT NULL,
  email           TEXT,
  age             INTEGER,
  kind            TEXT NOT NULL DEFAULT 'overnight',  -- 'overnight' | 'day_guest'
  dietary_tag     TEXT,             -- 'omnivore' | 'vegetarian' | 'vegan' | 'gluten_free' | 'lactose_free' | 'pescatarian' | 'unknown'
  free_text       TEXT,
  self_form_token TEXT UNIQUE,
  self_form_submitted_at TEXT,
  notes           TEXT,
  created_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_participant_booking
  ON participant (booking_id);

CREATE TABLE IF NOT EXISTS participant_allergy (
  participant_id  TEXT NOT NULL REFERENCES participant(participant_id),
  allergen        TEXT NOT NULL,    -- 'nuts' | 'soy' | 'gluten_strict' | 'dairy' | 'egg' | 'fish' | 'other'
  severity        TEXT NOT NULL DEFAULT 'standard',  -- 'standard' | 'separate_prep'
  note            TEXT,
  PRIMARY KEY (participant_id, allergen)
);

CREATE TABLE IF NOT EXISTS room_assignment (
  booking_id      TEXT NOT NULL REFERENCES booking(booking_id),
  participant_id  TEXT NOT NULL REFERENCES participant(participant_id),
  room_id         TEXT NOT NULL REFERENCES room(room_id),
  PRIMARY KEY (booking_id, participant_id)
);

CREATE INDEX IF NOT EXISTS idx_room_assignment_room
  ON room_assignment (room_id);

-- ─────────────────────────────────────────────────────────────────────
-- Invoicing

CREATE TABLE IF NOT EXISTS invoice (
  invoice_id      TEXT PRIMARY KEY,
  booking_id      TEXT NOT NULL REFERENCES booking(booking_id),
  kind            TEXT NOT NULL,    -- 'deposit' | 'final'
  invoice_number  TEXT NOT NULL UNIQUE,
  issued_on       TEXT NOT NULL,
  due_on          TEXT,
  paid_on         TEXT,
  amount_cents    INTEGER NOT NULL,
  status          TEXT NOT NULL DEFAULT 'outstanding',  -- 'outstanding' | 'paid' | 'cancelled'
  pdf_url         TEXT,
  datev_ref       TEXT
);

CREATE INDEX IF NOT EXISTS idx_invoice_booking
  ON invoice (booking_id);

-- ─────────────────────────────────────────────────────────────────────
-- Audit

CREATE TABLE IF NOT EXISTS audit_log (
  audit_id        TEXT PRIMARY KEY,
  venue_id        TEXT NOT NULL REFERENCES venue(venue_id),
  user_id         TEXT REFERENCES app_user(user_id),
  entity          TEXT NOT NULL,
  entity_id       TEXT NOT NULL,
  field           TEXT,
  before_value    TEXT,
  after_value     TEXT,
  action          TEXT NOT NULL,    -- 'create' | 'update' | 'delete'
  at              TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_audit_entity
  ON audit_log (entity, entity_id);