-- AvtoAmbor schema. Money is stored as INTEGER dirams (1 TJS = 100 dirams).
-- Translated fields use _en / _tg suffixes.

CREATE TABLE IF NOT EXISTS categories (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  name_en     TEXT NOT NULL,
  name_tg     TEXT NOT NULL,
  sort_order  INTEGER NOT NULL DEFAULT 0
);

CREATE TABLE IF NOT EXISTS suppliers (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  name        TEXT NOT NULL,
  phone       TEXT,
  address     TEXT,
  notes       TEXT,
  created_at  TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS parts (
  id                  INTEGER PRIMARY KEY AUTOINCREMENT,
  sku                 TEXT NOT NULL UNIQUE,
  name_en             TEXT NOT NULL,
  name_tg             TEXT NOT NULL,
  description_en      TEXT,
  description_tg      TEXT,
  category_id         INTEGER REFERENCES categories(id) ON DELETE SET NULL,
  unit                TEXT NOT NULL DEFAULT 'pcs',
  cost_price          INTEGER NOT NULL DEFAULT 0,    -- dirams
  sale_price          INTEGER NOT NULL DEFAULT 0,    -- dirams
  quantity_on_hand    INTEGER NOT NULL DEFAULT 0,
  reorder_level       INTEGER NOT NULL DEFAULT 0,
  location            TEXT,
  barcode             TEXT,
  active              INTEGER NOT NULL DEFAULT 1,
  created_at          TEXT NOT NULL DEFAULT (datetime('now')),
  updated_at          TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS stock_movements (
  id              INTEGER PRIMARY KEY AUTOINCREMENT,
  part_id         INTEGER NOT NULL REFERENCES parts(id) ON DELETE CASCADE,
  movement_type   TEXT NOT NULL CHECK(movement_type IN ('in','out','adjust')),
  quantity        INTEGER NOT NULL,   -- positive for in/adjust-up, negative for out/adjust-down
  unit_price      INTEGER,            -- dirams; nullable for adjustments
  supplier_id     INTEGER REFERENCES suppliers(id) ON DELETE SET NULL,
  reference       TEXT,
  notes           TEXT,
  created_at      TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_parts_sku           ON parts(sku);
CREATE INDEX IF NOT EXISTS idx_parts_barcode       ON parts(barcode);
CREATE INDEX IF NOT EXISTS idx_parts_category      ON parts(category_id);
CREATE INDEX IF NOT EXISTS idx_movements_part      ON stock_movements(part_id);
CREATE INDEX IF NOT EXISTS idx_movements_created   ON stock_movements(created_at);

CREATE TABLE IF NOT EXISTS invoices (
  id           INTEGER PRIMARY KEY AUTOINCREMENT,
  status       TEXT NOT NULL CHECK(status IN ('pending','saved')) DEFAULT 'pending',
  total_dirams INTEGER NOT NULL DEFAULT 0,
  notes        TEXT,
  created_at   TEXT NOT NULL DEFAULT (datetime('now')),
  saved_at     TEXT
);

CREATE TABLE IF NOT EXISTS invoice_lines (
  id                 INTEGER PRIMARY KEY AUTOINCREMENT,
  invoice_id         INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
  part_id            INTEGER REFERENCES parts(id) ON DELETE SET NULL,
  label              TEXT,
  quantity           INTEGER NOT NULL CHECK(quantity > 0),
  unit_price_dirams  INTEGER NOT NULL DEFAULT 0,
  affects_inventory  INTEGER NOT NULL DEFAULT 1,
  sort_order         INTEGER NOT NULL DEFAULT 0,
  created_at         TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_invoice_lines_invoice ON invoice_lines(invoice_id);
CREATE UNIQUE INDEX IF NOT EXISTS idx_invoices_one_pending
  ON invoices(status) WHERE status = 'pending';