-- =============================================================
-- ARCHIVO: 03b-core-companies.sql
-- DESCRIPCION: Tabla de empresas/companies del tenant
-- VERSION: 1.0.0
-- PROYECTO: ERP-Core V2
-- FECHA: 2026-02-05
-- DEPENDE DE: 00-auth-base.sql (auth.tenants, auth.users)
--             20-core-catalogs.sql (core.currencies)
--             16-partners.sql (partners.partners)
-- NOTA: La entidad TypeORM usa schema 'auth'. Las FK en
--       45-hr.sql apuntan a core.companies (inconsistencia
--       conocida a corregir en tarea separada).
-- =============================================================

-- =====================
-- SCHEMA: auth (si no existe)
-- =====================
CREATE SCHEMA IF NOT EXISTS auth;

-- =====================
-- TABLA: companies
-- Empresas registradas dentro de un tenant (multi-empresa)
-- Soporta jerarquia de empresas (parent_company_id)
-- =====================
CREATE TABLE IF NOT EXISTS auth.companies (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL REFERENCES auth.tenants(id) ON DELETE CASCADE,

    -- Identificacion
    name VARCHAR(255) NOT NULL,
    legal_name VARCHAR(255),
    tax_id VARCHAR(50),

    -- Relaciones
    currency_id UUID REFERENCES core.currencies(id) ON DELETE SET NULL,
    parent_company_id UUID REFERENCES auth.companies(id) ON DELETE SET NULL,
    partner_id UUID REFERENCES partners.partners(id) ON DELETE SET NULL,

    -- Configuracion
    settings JSONB DEFAULT '{}',

    -- Auditoria
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    created_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,
    deleted_at TIMESTAMPTZ,
    deleted_by UUID REFERENCES auth.users(id) ON DELETE SET NULL
);

-- =====================
-- INDICES
-- =====================
CREATE INDEX IF NOT EXISTS idx_companies_tenant_id ON auth.companies(tenant_id);
CREATE INDEX IF NOT EXISTS idx_companies_parent_company_id ON auth.companies(parent_company_id);
CREATE INDEX IF NOT EXISTS idx_companies_active ON auth.companies(tenant_id) WHERE deleted_at IS NULL;
CREATE INDEX IF NOT EXISTS idx_companies_tax_id ON auth.companies(tax_id);
CREATE INDEX IF NOT EXISTS idx_companies_currency ON auth.companies(currency_id);
CREATE INDEX IF NOT EXISTS idx_companies_partner ON auth.companies(partner_id);

-- =====================
-- RLS POLICIES
-- =====================
ALTER TABLE auth.companies ENABLE ROW LEVEL SECURITY;
CREATE POLICY tenant_isolation_companies ON auth.companies
    USING (tenant_id = current_setting('app.current_tenant_id', true)::uuid);

-- =====================
-- TRIGGER: updated_at automatico
-- =====================
CREATE OR REPLACE FUNCTION auth.update_companies_updated_at()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at := CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER trg_companies_updated_at
    BEFORE UPDATE ON auth.companies
    FOR EACH ROW
    EXECUTE FUNCTION auth.update_companies_updated_at();

-- =====================
-- COMENTARIOS
-- =====================
COMMENT ON TABLE auth.companies IS 'Empresas registradas dentro de un tenant. Soporta jerarquia via parent_company_id.';
COMMENT ON COLUMN auth.companies.tenant_id IS 'Tenant al que pertenece la empresa';
COMMENT ON COLUMN auth.companies.name IS 'Nombre comercial de la empresa';
COMMENT ON COLUMN auth.companies.legal_name IS 'Razon social / nombre legal';
COMMENT ON COLUMN auth.companies.tax_id IS 'RFC o identificador fiscal';
COMMENT ON COLUMN auth.companies.currency_id IS 'Moneda principal de la empresa (ref core.currencies)';
COMMENT ON COLUMN auth.companies.parent_company_id IS 'Empresa padre para jerarquia corporativa';
COMMENT ON COLUMN auth.companies.partner_id IS 'Partner asociado a la empresa (ref partners.partners)';
COMMENT ON COLUMN auth.companies.settings IS 'Configuraciones especificas de la empresa en formato JSON';