-- View: paper_trade_scorecard
-- Aggregates paper trading performance per symbol with win rates, PnL, and
-- average fill quality. Filters to paper execution mode only.
-- Requirements: 10.1, 10.2, 10.3
-- Design ref: Section 9.2 (paper trading PnL scorecard)

CREATE OR REPLACE VIEW lakehouse.stonks.paper_trade_scorecard AS
SELECT
    pnl.ticker,
    pnl.broker_account,
    COUNT(DISTINCT pnl.dt)                          AS trading_days,
    SUM(pnl.realized_pnl)                           AS total_realized_pnl,
    SUM(pnl.unrealized_pnl)                         AS total_unrealized_pnl,
    SUM(pnl.net_pnl)                                AS total_net_pnl,
    SUM(pnl.fees)                                   AS total_fees,
    AVG(pnl.net_pnl)                                AS avg_daily_pnl,
    -- Win rate: fraction of days with positive net PnL
    CAST(
        COUNT(CASE WHEN pnl.net_pnl > 0 THEN 1 END) AS DOUBLE
    ) / NULLIF(COUNT(*), 0)                         AS win_rate,
    -- Worst and best single-day PnL
    MIN(pnl.net_pnl)                                AS worst_day_pnl,
    MAX(pnl.net_pnl)                                AS best_day_pnl,
    -- Order counts from trade_orders
    COUNT(DISTINCT o.order_id)                       AS total_orders,
    COUNT(DISTINCT CASE WHEN o.status = 'filled' THEN o.order_id END)
                                                     AS filled_orders,
    MIN(pnl.dt)                                      AS first_trade_date,
    MAX(pnl.dt)                                      AS last_trade_date
FROM
    lakehouse.stonks.pnl_daily pnl
LEFT JOIN
    lakehouse.stonks.trade_orders o
    ON pnl.ticker = o.ticker
    AND pnl.broker_account = o.broker_account
    AND pnl.dt = o.dt
    AND o.execution_mode = 'paper'
WHERE
    pnl.execution_mode = 'paper'
GROUP BY
    pnl.ticker,
    pnl.broker_account;