CREATE TABLE IF NOT EXISTS inventory_products (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  category TEXT NOT NULL CHECK(category IN ('medication','dewormer','vaccine')),
  reference_id INTEGER,
  name TEXT NOT NULL,
  unit TEXT NOT NULL DEFAULT 'unité',
  minimum_quantity REAL NOT NULL DEFAULT 0 CHECK(minimum_quantity >= 0),
  active INTEGER NOT NULL DEFAULT 1 CHECK(active IN (0,1)),
  created_at TEXT NOT NULL DEFAULT(datetime('now')),
  updated_at TEXT NOT NULL DEFAULT(datetime('now')),
  UNIQUE(category,reference_id),
  UNIQUE(category,name)
);

CREATE TABLE IF NOT EXISTS inventory_batches (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  product_id INTEGER NOT NULL REFERENCES inventory_products(id) ON DELETE CASCADE,
  batch_number TEXT,
  expires_on TEXT,
  supplier_contact_id INTEGER REFERENCES directory_contacts(id) ON DELETE SET NULL,
  unit_cost_cents INTEGER CHECK(unit_cost_cents IS NULL OR unit_cost_cents >= 0),
  quantity REAL NOT NULL DEFAULT 0,
  opened_on TEXT,
  notes TEXT,
  created_at TEXT NOT NULL DEFAULT(datetime('now'))
);

CREATE TABLE IF NOT EXISTS inventory_movements (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  product_id INTEGER NOT NULL REFERENCES inventory_products(id) ON DELETE CASCADE,
  batch_id INTEGER REFERENCES inventory_batches(id) ON DELETE SET NULL,
  movement_type TEXT NOT NULL CHECK(movement_type IN ('entry','administration','loss','correction')),
  quantity_delta REAL NOT NULL CHECK(quantity_delta <> 0),
  animal_id INTEGER REFERENCES animals(id) ON DELETE SET NULL,
  occurred_at TEXT NOT NULL DEFAULT(datetime('now')),
  reason TEXT,
  created_by INTEGER REFERENCES users(id) ON DELETE SET NULL,
  created_at TEXT NOT NULL DEFAULT(datetime('now'))
);
CREATE INDEX IF NOT EXISTS idx_inventory_batches_product ON inventory_batches(product_id,expires_on);
CREATE INDEX IF NOT EXISTS idx_inventory_movements_product ON inventory_movements(product_id,occurred_at DESC);

INSERT OR IGNORE INTO app_settings(setting_key,setting_value) VALUES
('backup_schedule_enabled','0'),('backup_schedule_frequency','daily'),('backup_last_run_at',''),('backup_last_verified_at',''),
('privacy_retention_adopter_years','5'),('privacy_retention_foster_years','5'),('privacy_retention_volunteer_years','5'),('privacy_access_log_months','24');