-- SiMS HQ database DDL (generated snapshot 2026-07-10; source of truth: apps/hq/src/db.ts)
-- Engine today: SQLite. Production target: Postgres (D15) — types map 1:1 (TEXT/INTEGER).

CREATE TABLE audit_log (
  id TEXT PRIMARY KEY, at_wall TEXT NOT NULL, user_id TEXT NOT NULL, action TEXT NOT NULL,
  entity TEXT NOT NULL, entity_id TEXT NOT NULL, before_json TEXT, after_json TEXT
);

CREATE TABLE client (
  id TEXT PRIMARY KEY, code TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
  gstin TEXT, state_code TEXT NOT NULL DEFAULT '32', address TEXT NOT NULL DEFAULT '',
  contacts TEXT NOT NULL DEFAULT '[]', -- JSON [{name,phone,email,role}]
  status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('lead','active','dormant','lost')),
  notes TEXT NOT NULL DEFAULT '', source TEXT NOT NULL DEFAULT 'hq', created_at TEXT NOT NULL
);

CREATE TABLE client_module (
  id TEXT PRIMARY KEY, client_id TEXT NOT NULL, module_id TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'quoted' CHECK (status IN
    ('quoted','ordered','installing','installed','trained','live','expired','cancelled')),
  kind TEXT NOT NULL, edition TEXT NOT NULL DEFAULT 'standard',
  installed_on TEXT, completed_on TEXT, trained_on TEXT,
  next_renewal TEXT, active INTEGER NOT NULL DEFAULT 1
);

CREATE TABLE doc_series (
  doc_type TEXT NOT NULL, fy TEXT NOT NULL, prefix TEXT NOT NULL, next_seq INTEGER NOT NULL,
  PRIMARY KEY (doc_type, fy)
);

CREATE TABLE document (
  id TEXT PRIMARY KEY, doc_type TEXT NOT NULL CHECK (doc_type IN
    ('QUOTATION','PROFORMA','INVOICE','RECEIPT','CREDIT_NOTE')),
  doc_no TEXT, fy TEXT NOT NULL, client_id TEXT NOT NULL, doc_date TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'draft' CHECK (status IN
    ('draft','sent','accepted','invoiced','part_paid','paid','lost','cancelled')),
  ref_doc_id TEXT, -- QT→PI→INV chain; CN → the invoice it amends
  taxable_paise INTEGER NOT NULL, cgst_paise INTEGER NOT NULL, sgst_paise INTEGER NOT NULL,
  igst_paise INTEGER NOT NULL, round_off_paise INTEGER NOT NULL, payable_paise INTEGER NOT NULL,
  payload TEXT NOT NULL, -- JSON { lines: BillLine[], totals: BillTotals, terms?: string }
  source TEXT NOT NULL DEFAULT 'hq', -- 'apex' rows keep legacy numbers, exempt from series
  created_by TEXT NOT NULL, created_at TEXT NOT NULL,
  UNIQUE (doc_no)
);

CREATE TABLE document_event (
  id TEXT PRIMARY KEY, document_id TEXT NOT NULL, at_wall TEXT NOT NULL,
  kind TEXT NOT NULL, meta TEXT NOT NULL DEFAULT '{}'
);

CREATE TABLE email_account (
  id TEXT PRIMARY KEY, address TEXT NOT NULL, refresh_token_enc TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active','dead')), updated_at TEXT NOT NULL
);

CREATE TABLE email_log (
  id TEXT PRIMARY KEY, document_id TEXT, to_addr TEXT NOT NULL, subject TEXT NOT NULL,
  status TEXT NOT NULL CHECK (status IN ('sent','failed')), gmail_message_id TEXT,
  error TEXT, at_wall TEXT NOT NULL
);

CREATE TABLE module (
  id TEXT PRIMARY KEY, code TEXT NOT NULL UNIQUE, name TEXT NOT NULL,
  sac TEXT NOT NULL DEFAULT '998313', -- IT services default; CA session confirms per module
  allowed_kinds TEXT NOT NULL DEFAULT '["one_time","monthly","yearly","usage"]',
  multi_subscription INTEGER NOT NULL DEFAULT 0, active INTEGER NOT NULL DEFAULT 1,
  quote_content TEXT NOT NULL DEFAULT '[]' -- JSON string[]: "what's included" lines on quotes
);

CREATE TABLE module_price_book (
  id TEXT PRIMARY KEY, module_id TEXT NOT NULL, edition TEXT NOT NULL DEFAULT 'standard',
  kind TEXT NOT NULL, price_paise INTEGER NOT NULL, effective_from TEXT NOT NULL
);

CREATE TABLE payment (
  id TEXT PRIMARY KEY, client_id TEXT NOT NULL, received_on TEXT NOT NULL,
  mode TEXT NOT NULL CHECK (mode IN ('bank','upi','cheque','cash','other')),
  reference TEXT NOT NULL DEFAULT '', amount_paise INTEGER NOT NULL,
  tds_paise INTEGER NOT NULL DEFAULT 0, created_by TEXT NOT NULL, created_at TEXT NOT NULL
);

CREATE TABLE payment_allocation (
  id TEXT PRIMARY KEY, payment_id TEXT NOT NULL, document_id TEXT NOT NULL,
  amount_paise INTEGER NOT NULL -- includes this allocation's TDS share
);

CREATE TABLE session (
  token TEXT PRIMARY KEY, staff_id TEXT NOT NULL, expires_at TEXT NOT NULL
);

CREATE TABLE setting (
  key TEXT PRIMARY KEY, value TEXT NOT NULL
);

CREATE TABLE staff_user (
  id TEXT PRIMARY KEY, email TEXT NOT NULL UNIQUE, display_name TEXT NOT NULL,
  role TEXT NOT NULL CHECK (role IN ('owner','staff')),
  pw_salt TEXT NOT NULL, pw_hash TEXT NOT NULL, active INTEGER NOT NULL DEFAULT 1
);

CREATE TABLE stg_client (
  row_no INTEGER PRIMARY KEY, code TEXT, name TEXT, gstin TEXT, state_code TEXT,
  address TEXT, phone TEXT, email TEXT, status TEXT, problems TEXT NOT NULL DEFAULT '[]'
);

CREATE TABLE stg_invoice (
  row_no INTEGER PRIMARY KEY, client_code TEXT, doc_no TEXT, doc_date TEXT,
  taxable_paise INTEGER, tax_paise INTEGER, total_paise INTEGER, paid INTEGER,
  problems TEXT NOT NULL DEFAULT '[]'
);

CREATE TABLE tax_class (
  class_code TEXT NOT NULL, rate_pct_bp INTEGER NOT NULL,
  cess_pct_bp INTEGER NOT NULL DEFAULT 0, effective_from TEXT NOT NULL, effective_to TEXT
);