/**
 * Postgres migration set (D19). Numbered, applied in order by db-pg.ts's runner,
 * each inside its own transaction, recorded in schema_migrations. Inline strings
 * (not .sql files) so esbuild bundles them into dist/server.cjs with no file I/O.
 *
 * Translation choices vs the SQLite SCHEMA (deliberate, recorded in the D19 spec):
 * - every *_paise / money column is BIGINT (int4 overflows at ₹2.15 crore in paise);
 * - 0/1 flags stay INTEGER — repos say `active=1` and that SQL must be identical on
 *   both engines (boolean would break it);
 * - JSON payloads stay TEXT — node-pg auto-parses json/jsonb columns into objects,
 *   which would break the repos' JSON.parse at the edge. A jsonb ALTER is a later,
 *   pg-only optimisation if we ever index into payloads;
 * - dates stay TEXT ISO (house convention, index-friendly, no timezone surprises);
 * - the reminder.rule_kind CHECK is born in its final widened form (SQLite reaches
 *   it via the guarded table rebuild; Postgres starts correct).
 */

export interface PgMigration { id: string; sql: string }

export const PG_MIGRATIONS: PgMigration[] = [
  {
    id: '001-init',
    sql: `
CREATE TABLE IF NOT EXISTS staff_user (
  id text PRIMARY KEY, email text NOT NULL UNIQUE, display_name text NOT NULL,
  role text NOT NULL CHECK (role IN ('owner','manager','staff')),
  phone text, title text,
  pw_salt text NOT NULL, pw_hash text NOT NULL, active integer NOT NULL DEFAULT 1
);
CREATE TABLE IF NOT EXISTS session (
  token text PRIMARY KEY, staff_id text NOT NULL, expires_at text NOT NULL
);
CREATE TABLE IF NOT EXISTS 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 '[]',
  status text NOT NULL DEFAULT 'active' CHECK (status IN ('lead','active','dormant','lost')),
  owner_id text,
  anydesk text, os text, district text, sector text, db_password_enc text,
  notes text NOT NULL DEFAULT '', source text NOT NULL DEFAULT 'hq', created_at text NOT NULL
);
CREATE TABLE IF NOT EXISTS module (
  id text PRIMARY KEY, code text NOT NULL UNIQUE, name text NOT NULL,
  sac text NOT NULL DEFAULT '998313',
  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 '[]'
);
CREATE TABLE IF NOT EXISTS module_price_book (
  id text PRIMARY KEY, module_id text NOT NULL, edition text NOT NULL DEFAULT 'standard',
  kind text NOT NULL, price_paise bigint NOT NULL, effective_from text NOT NULL
);
CREATE TABLE IF NOT EXISTS 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 IF NOT EXISTS 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
);
CREATE TABLE IF NOT EXISTS 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 IF NOT EXISTS 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,
  due_date text,
  status text NOT NULL DEFAULT 'draft' CHECK (status IN
    ('draft','sent','accepted','invoiced','part_paid','paid','lost','cancelled')),
  ref_doc_id text,
  taxable_paise bigint NOT NULL, cgst_paise bigint NOT NULL, sgst_paise bigint NOT NULL,
  igst_paise bigint NOT NULL, round_off_paise bigint NOT NULL, payable_paise bigint NOT NULL,
  payload text NOT NULL,
  source text NOT NULL DEFAULT 'hq',
  created_by text NOT NULL, created_at text NOT NULL,
  UNIQUE (doc_no)
);
CREATE TABLE IF NOT EXISTS 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 IF NOT EXISTS document_share (
  id text PRIMARY KEY, document_id text NOT NULL, token text NOT NULL UNIQUE,
  created_by text NOT NULL, created_at text NOT NULL,
  expires_at text,
  revoked integer NOT NULL DEFAULT 0
);
CREATE TABLE IF NOT EXISTS 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 bigint NOT NULL,
  tds_paise bigint NOT NULL DEFAULT 0, created_by text NOT NULL, created_at text NOT NULL
);
CREATE TABLE IF NOT EXISTS payment_allocation (
  id text PRIMARY KEY, payment_id text NOT NULL, document_id text NOT NULL,
  amount_paise bigint NOT NULL
);
CREATE TABLE IF NOT EXISTS 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 IF NOT EXISTS 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,
  bounced integer NOT NULL DEFAULT 0
);
CREATE TABLE IF NOT EXISTS setting (
  key text PRIMARY KEY, value text NOT NULL
);
CREATE TABLE IF NOT EXISTS 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 IF NOT EXISTS stg_client (
  row_no integer PRIMARY KEY, code text, name text, gstin text, state_code text,
  address text, phone text, email text, status text,
  anydesk text, os text, district text, sector text,
  problems text NOT NULL DEFAULT '[]'
);
CREATE TABLE IF NOT EXISTS stg_invoice (
  row_no integer PRIMARY KEY, client_code text, doc_no text, doc_date text,
  taxable_paise bigint, tax_paise bigint, total_paise bigint, paid integer,
  problems text NOT NULL DEFAULT '[]'
);
CREATE TABLE IF NOT EXISTS recurring_plan (
  id text PRIMARY KEY, client_id text NOT NULL,
  client_module_id text,
  cadence text NOT NULL CHECK (cadence IN ('monthly','yearly')),
  amount_paise bigint,
  next_run text NOT NULL,
  policy text NOT NULL DEFAULT 'manual' CHECK (policy IN ('auto','manual')),
  active integer NOT NULL DEFAULT 1
);
CREATE TABLE IF NOT EXISTS amc_contract (
  id text PRIMARY KEY, client_id text NOT NULL, coverage text NOT NULL DEFAULT '',
  period_from text NOT NULL, period_to text NOT NULL, amount_paise bigint NOT NULL,
  renewal_reminder_days integer NOT NULL DEFAULT 30,
  legacy_paid integer,
  invoice_doc_id text, active integer NOT NULL DEFAULT 1
);
CREATE TABLE IF NOT EXISTS interaction_type (
  code text PRIMARY KEY, label text NOT NULL
);
CREATE TABLE IF NOT EXISTS interaction (
  id text PRIMARY KEY, client_id text NOT NULL, type_code text NOT NULL,
  on_date text NOT NULL, staff_id text NOT NULL, notes text NOT NULL DEFAULT '',
  outcome text CHECK (outcome IN ('positive','neutral','negative')),
  follow_up_on text, created_at text NOT NULL
);
CREATE TABLE IF NOT EXISTS reminder (
  id text PRIMARY KEY,
  rule_kind text NOT NULL CHECK (rule_kind IN
    ('invoice_overdue','renewal_due','amc_expiring','follow_up','recurring_generated','email_bounced','quote_followup')),
  subject_id text NOT NULL, due_period text NOT NULL, client_id text NOT NULL,
  doc_id text,
  status text NOT NULL DEFAULT 'queued' CHECK (status IN ('queued','sent','failed','dismissed')),
  policy_applied text NOT NULL DEFAULT 'manual' CHECK (policy_applied IN ('auto','manual')),
  error text, created_at text NOT NULL, sent_at text,
  UNIQUE (rule_kind, subject_id, due_period)
);
CREATE TABLE IF NOT EXISTS reminder_schedule (
  id text PRIMARY KEY, rule_kind text NOT NULL,
  effective_from text NOT NULL, effective_to text,
  day_offsets text NOT NULL,
  subject text, body text
);
CREATE TABLE IF NOT EXISTS aws_usage (
  id text PRIMARY KEY, client_id text NOT NULL,
  month text NOT NULL,
  storage_gb double precision NOT NULL DEFAULT 0,
  transfer_gb double precision NOT NULL DEFAULT 0,
  cost_paise bigint NOT NULL DEFAULT 0,
  source text NOT NULL DEFAULT 'auto' CHECK (source IN ('auto','manual')),
  updated_at text NOT NULL,
  UNIQUE (client_id, month)
);
`,
  },
  {
    id: '002-apex-parity',
    sql: `
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS provider text;
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS username text;
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS password_enc text;
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS details text NOT NULL DEFAULT '[]';
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS remark text;
CREATE TABLE IF NOT EXISTS client_branch (
  id text PRIMARY KEY, client_id text NOT NULL, name text NOT NULL,
  code text, active integer NOT NULL DEFAULT 1
);
CREATE TABLE IF NOT EXISTS ticket (
  id text PRIMARY KEY, client_id text NOT NULL, branch_id text,
  module_code text,
  kind text NOT NULL DEFAULT '',
  description text NOT NULL DEFAULT '',
  status text NOT NULL DEFAULT 'open' CHECK (status IN ('open','in_progress','waiting','closed','dropped')),
  assigned_to text,
  online_offline text,
  opened_on text NOT NULL, closed_on text,
  created_by text NOT NULL, created_at text NOT NULL,
  source text NOT NULL DEFAULT 'hq'
);
`,
  },
  {
    id: '003-module-field-schema',
    sql: `
ALTER TABLE module ADD COLUMN IF NOT EXISTS field_spec text NOT NULL DEFAULT '[]';
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS field_values text NOT NULL DEFAULT '{}';
ALTER TABLE client_module ADD COLUMN IF NOT EXISTS secrets_enc text;
`,
  },
  {
    id: '004-usage-rate-band',
    sql: `
CREATE TABLE IF NOT EXISTS usage_rate_band (
  id text PRIMARY KEY, module_id text NOT NULL, effective_from text NOT NULL,
  min_qty bigint NOT NULL, rate_paise bigint NOT NULL
);
`,
  },
  {
    id: '005-project-milestone',
    sql: `
CREATE TABLE IF NOT EXISTS project_milestone (
  id text PRIMARY KEY, client_module_id text NOT NULL,
  key text NOT NULL, label text NOT NULL,
  done integer NOT NULL DEFAULT 0, done_on text, sort integer NOT NULL DEFAULT 0,
  UNIQUE (client_module_id, key)
);
`,
  },
  {
    id: '006-login-lockout',
    sql: `
ALTER TABLE staff_user ADD COLUMN IF NOT EXISTS failed_count integer NOT NULL DEFAULT 0;
ALTER TABLE staff_user ADD COLUMN IF NOT EXISTS locked_until text;
`,
  },
  {
    // D24 (red-team): indexes for the queries that run over the real data. Same DDL as the
    // SQLite SCHEMA's INDEX_DDL (CREATE INDEX IF NOT EXISTS is valid on both engines).
    id: '007-indexes',
    sql: `
CREATE INDEX IF NOT EXISTS ix_document_client ON document (client_id);
CREATE INDEX IF NOT EXISTS ix_document_type_status ON document (doc_type, status);
CREATE INDEX IF NOT EXISTS ix_document_ref ON document (ref_doc_id);
CREATE INDEX IF NOT EXISTS ix_document_created_by ON document (created_by);
CREATE INDEX IF NOT EXISTS ix_document_event_doc ON document_event (document_id);
CREATE INDEX IF NOT EXISTS ix_document_share_doc ON document_share (document_id);
CREATE INDEX IF NOT EXISTS ix_payment_client ON payment (client_id);
CREATE INDEX IF NOT EXISTS ix_alloc_doc ON payment_allocation (document_id);
CREATE INDEX IF NOT EXISTS ix_alloc_payment ON payment_allocation (payment_id);
CREATE INDEX IF NOT EXISTS ix_client_module_client ON client_module (client_id);
CREATE INDEX IF NOT EXISTS ix_client_module_module ON client_module (module_id, active);
CREATE INDEX IF NOT EXISTS ix_client_module_renewal ON client_module (next_renewal);
CREATE INDEX IF NOT EXISTS ix_client_owner ON client (owner_id);
CREATE INDEX IF NOT EXISTS ix_client_branch_client ON client_branch (client_id);
CREATE INDEX IF NOT EXISTS ix_ticket_client ON ticket (client_id);
CREATE INDEX IF NOT EXISTS ix_ticket_status ON ticket (status);
CREATE INDEX IF NOT EXISTS ix_ticket_assigned ON ticket (assigned_to);
CREATE INDEX IF NOT EXISTS ix_interaction_client ON interaction (client_id);
CREATE INDEX IF NOT EXISTS ix_interaction_followup ON interaction (follow_up_on);
CREATE INDEX IF NOT EXISTS ix_reminder_status ON reminder (status);
CREATE INDEX IF NOT EXISTS ix_reminder_client ON reminder (client_id);
CREATE INDEX IF NOT EXISTS ix_reminder_doc ON reminder (doc_id);
CREATE INDEX IF NOT EXISTS ix_price_book_module ON module_price_book (module_id);
CREATE INDEX IF NOT EXISTS ix_rate_band_module ON usage_rate_band (module_id, effective_from);
CREATE INDEX IF NOT EXISTS ix_recurring_active_run ON recurring_plan (active, next_run);
CREATE INDEX IF NOT EXISTS ix_amc_client ON amc_contract (client_id);
CREATE INDEX IF NOT EXISTS ix_aws_client ON aws_usage (client_id);
CREATE INDEX IF NOT EXISTS ix_session_staff ON session (staff_id);
CREATE INDEX IF NOT EXISTS ix_audit_entity ON audit_log (entity, entity_id);
CREATE INDEX IF NOT EXISTS ix_milestone_cm ON project_milestone (client_module_id);
`,
  },
  {
    id: '008-module-sort-order',
    sql: `ALTER TABLE module ADD COLUMN IF NOT EXISTS sort_order integer NOT NULL DEFAULT 100;`,
  },
  {
    // D25: login by username. Backfill from email so existing accounts keep working.
    id: '009-staff-username',
    sql: `
ALTER TABLE staff_user ADD COLUMN IF NOT EXISTS username text;
UPDATE staff_user SET username=email WHERE username IS NULL;
CREATE UNIQUE INDEX IF NOT EXISTS ix_staff_username ON staff_user (username);
`,
  },
  {
    // D28: SMS gateway balance-check telemetry (operational sync log, not audited).
    id: '010-sms-balance-check',
    sql: `
CREATE TABLE IF NOT EXISTS sms_balance_check (
  client_module_id text PRIMARY KEY,
  status text NOT NULL,
  balance integer,
  message text,
  checked_at text NOT NULL
);
`,
  },
]