-- =====================================================
-- PORTFOLIO SCHEMA - PORTFOLIOS TABLE
-- =====================================================
-- Description: User portfolios with asset allocations
-- Schema: portfolio
-- Author: Database Agent
-- Date: 2026-01-25
-- =====================================================

CREATE TABLE portfolio.portfolios (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL REFERENCES auth.users(id) ON DELETE CASCADE,
  name VARCHAR(100) NOT NULL,
  description TEXT,
  risk_profile portfolio.risk_profile NOT NULL DEFAULT 'moderate',

  -- Portfolio values (updated by triggers/jobs)
  total_value DECIMAL(20, 8) NOT NULL DEFAULT 0,
  total_cost DECIMAL(20, 8) NOT NULL DEFAULT 0,
  unrealized_pnl DECIMAL(20, 8) NOT NULL DEFAULT 0,
  unrealized_pnl_percent DECIMAL(10, 4) NOT NULL DEFAULT 0,

  -- Statistics
  day_change_percent DECIMAL(10, 4) DEFAULT 0,
  week_change_percent DECIMAL(10, 4) DEFAULT 0,
  month_change_percent DECIMAL(10, 4) DEFAULT 0,
  all_time_change_percent DECIMAL(10, 4) DEFAULT 0,

  -- Metadata
  is_active BOOLEAN NOT NULL DEFAULT true,
  is_primary BOOLEAN NOT NULL DEFAULT false,
  last_rebalanced_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Indexes
CREATE INDEX idx_portfolios_user_id ON portfolio.portfolios(user_id);
CREATE INDEX idx_portfolios_risk_profile ON portfolio.portfolios(risk_profile);
CREATE INDEX idx_portfolios_is_active ON portfolio.portfolios(is_active) WHERE is_active = true;

-- Only one primary portfolio per user
CREATE UNIQUE INDEX idx_portfolios_user_primary
  ON portfolio.portfolios(user_id)
  WHERE is_primary = true;

-- Comments
COMMENT ON TABLE portfolio.portfolios IS 'User investment portfolios with configurable allocations';
COMMENT ON COLUMN portfolio.portfolios.risk_profile IS 'User risk tolerance: conservative, moderate, aggressive';
COMMENT ON COLUMN portfolio.portfolios.total_value IS 'Current total value of all allocations in USD';
COMMENT ON COLUMN portfolio.portfolios.unrealized_pnl IS 'Unrealized profit/loss = total_value - total_cost';
COMMENT ON COLUMN portfolio.portfolios.is_primary IS 'Only one portfolio can be primary per user';

-- Trigger for updated_at
CREATE OR REPLACE FUNCTION portfolio.update_portfolio_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER trg_portfolios_updated_at
  BEFORE UPDATE ON portfolio.portfolios
  FOR EACH ROW
  EXECUTE FUNCTION portfolio.update_portfolio_updated_at();