-- ============================================================
-- V011__indexes_and_aggregates.sql
-- Doplňuje V010__indexes.sql: indexy na forecast + hourly CA telemetrie.
-- (Indexy planning_run, planning_interval, market_price, audit, mode_log,
--  ev_session jsou již ve V010 – zde se neopakují, aby nevznikly duplicitní B-stromy.)
-- ============================================================

-- ============================================================
-- Indexy pro výkon (forecast – nové oproti V010)
-- ============================================================

CREATE INDEX IF NOT EXISTS idx_forecast_run_site_array
    ON ems.forecast_pv_run (site_id, pv_array_id, created_at DESC);

CREATE INDEX IF NOT EXISTS idx_forecast_interval_run_start
    ON ems.forecast_pv_interval (run_id, interval_start);

-- ============================================================
-- TimescaleDB Continuous Aggregates pro dashboard výkon
-- ============================================================

-- Hodinové agregáty telemetrie střídače (pro graf posledních 7 dní)
CREATE MATERIALIZED VIEW IF NOT EXISTS ems.telemetry_inverter_hourly
WITH (timescaledb.continuous) AS
SELECT
    time_bucket('1 hour', measured_at)    AS hour,
    site_id,
    AVG(pv_power_w)::INT                  AS avg_pv_w,
    AVG(battery_power_w)::INT             AS avg_battery_w,
    AVG(grid_power_w)::INT                AS avg_grid_w,
    AVG(load_power_w)::INT                AS avg_load_w,
    LAST(battery_soc_percent, measured_at) AS last_soc_pct,
    COUNT(*)                               AS sample_count
FROM ems.telemetry_inverter
GROUP BY hour, site_id
WITH NO DATA;

-- Refresh policy: každých 15 minut. Okno musí pokrývat ≥2× time_bucket (1h) → min. šířka >2h.
SELECT add_continuous_aggregate_policy(
    'ems.telemetry_inverter_hourly',
    start_offset => INTERVAL '2 hours 15 minutes',
    end_offset   => INTERVAL '1 minute',
    schedule_interval => INTERVAL '15 minutes'
);

-- ============================================================
-- View pro použití v dashboardu (7 dní zpět)
-- ============================================================

CREATE OR REPLACE VIEW ems.vw_telemetry_hourly_7d AS
SELECT *
FROM ems.telemetry_inverter_hourly
WHERE hour >= now() - INTERVAL '7 days'
ORDER BY hour DESC;

COMMENT ON VIEW ems.telemetry_inverter_hourly IS
'Hodinové agregáty telemetrie střídače. TimescaleDB continuous aggregate.
Refresh každých 15 minut. Používat pro grafy delší než 1 den.';