-- ============================================================================
-- SCHEMA: tenants
-- TABLE: tenants, tenant_settings
-- DESCRIPTION: Sistema de Multi-Tenancy para organizaciones/empresas
-- VERSION: 1.0.0
-- CREATED: 2026-01-10
-- ============================================================================

-- Crear schema si no existe
CREATE SCHEMA IF NOT EXISTS tenants;

-- Enum para estado de tenant
DO $$ BEGIN
    CREATE TYPE tenants.tenant_status AS ENUM (
        'pending',      -- Pendiente de activacion
        'active',       -- Activo y operativo
        'suspended',    -- Suspendido (impago o violacion)
        'deleted'       -- Eliminado (soft delete)
    );
EXCEPTION
    WHEN duplicate_object THEN null;
END $$;

-- Enum para estado de subscription
DO $$ BEGIN
    CREATE TYPE tenants.subscription_status AS ENUM (
        'trialing',     -- En periodo de prueba
        'active',       -- Activo con pagos al dia
        'past_due',     -- Pago vencido
        'canceled',     -- Cancelado
        'incomplete'    -- Configuracion incompleta
    );
EXCEPTION
    WHEN duplicate_object THEN null;
END $$;

-- Tabla principal de Tenants (Organizaciones)
CREATE TABLE IF NOT EXISTS tenants.tenants (
    -- Identificadores
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    -- Informacion basica
    name VARCHAR(255) NOT NULL,
    slug VARCHAR(100) NOT NULL UNIQUE,
    domain VARCHAR(255),
    logo_url TEXT,

    -- Estado
    status tenants.tenant_status NOT NULL DEFAULT 'pending',

    -- Subscription info (referencia a billing)
    plan_id UUID,  -- FK a plans.plans (se agrega despues)
    subscription_status tenants.subscription_status DEFAULT 'trialing',
    trial_ends_at TIMESTAMPTZ DEFAULT (NOW() + INTERVAL '14 days'),

    -- Stripe integration
    stripe_customer_id VARCHAR(255),
    stripe_subscription_id VARCHAR(255),

    -- Settings (JSONB flexible)
    settings JSONB NOT NULL DEFAULT '{
        "timezone": "America/Mexico_City",
        "locale": "es-MX",
        "currency": "MXN",
        "date_format": "DD/MM/YYYY"
    }'::JSONB,

    -- Metadata adicional
    metadata JSONB DEFAULT '{}'::JSONB,

    -- Soft delete
    deleted_at TIMESTAMPTZ,

    -- Timestamps
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

COMMENT ON TABLE tenants.tenants IS
'Organizaciones/empresas que usan la plataforma. Base del sistema multi-tenant.';

COMMENT ON COLUMN tenants.tenants.slug IS
'Identificador URL-safe unico para el tenant (ej: acme-corp)';

COMMENT ON COLUMN tenants.tenants.settings IS
'Configuracion del tenant: timezone, locale, currency, etc.';

-- Indices
CREATE INDEX IF NOT EXISTS idx_tenants_slug
    ON tenants.tenants(slug);

CREATE INDEX IF NOT EXISTS idx_tenants_status
    ON tenants.tenants(status) WHERE deleted_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_tenants_stripe_customer
    ON tenants.tenants(stripe_customer_id) WHERE stripe_customer_id IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_tenants_subscription_status
    ON tenants.tenants(subscription_status);

-- Trigger para updated_at
CREATE OR REPLACE FUNCTION tenants.update_tenant_timestamp()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS tenant_updated_at ON tenants.tenants;
CREATE TRIGGER tenant_updated_at
    BEFORE UPDATE ON tenants.tenants
    FOR EACH ROW
    EXECUTE FUNCTION tenants.update_tenant_timestamp();

-- ============================================================================
-- TABLA: tenant_settings (configuracion extendida)
-- ============================================================================

CREATE TABLE IF NOT EXISTS tenants.tenant_settings (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL REFERENCES tenants.tenants(id) ON DELETE CASCADE,

    -- Configuracion por categoria
    category VARCHAR(50) NOT NULL,  -- 'branding', 'notifications', 'security', etc.
    key VARCHAR(100) NOT NULL,
    value JSONB NOT NULL,

    -- Timestamps
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    -- Unique por tenant + category + key
    UNIQUE (tenant_id, category, key)
);

COMMENT ON TABLE tenants.tenant_settings IS
'Configuraciones extendidas por tenant, organizadas por categoria';

-- Indices
CREATE INDEX IF NOT EXISTS idx_tenant_settings_tenant
    ON tenants.tenant_settings(tenant_id);

CREATE INDEX IF NOT EXISTS idx_tenant_settings_category
    ON tenants.tenant_settings(tenant_id, category);

-- Trigger para updated_at
DROP TRIGGER IF EXISTS tenant_settings_updated_at ON tenants.tenant_settings;
CREATE TRIGGER tenant_settings_updated_at
    BEFORE UPDATE ON tenants.tenant_settings
    FOR EACH ROW
    EXECUTE FUNCTION tenants.update_tenant_timestamp();

-- RLS Policy (tenant_settings aislado por tenant)
ALTER TABLE tenants.tenant_settings ENABLE ROW LEVEL SECURITY;

CREATE POLICY tenant_settings_isolation ON tenants.tenant_settings
    FOR ALL
    USING (tenant_id = current_setting('app.current_tenant_id', true)::UUID);

-- Grants
GRANT SELECT, INSERT, UPDATE ON tenants.tenants TO trading_app;
GRANT SELECT, INSERT, UPDATE, DELETE ON tenants.tenant_settings TO trading_app;
GRANT SELECT ON tenants.tenants TO trading_readonly;
GRANT SELECT ON tenants.tenant_settings TO trading_readonly;