-- =============================================================
-- R__067_vw_site_effective_price_economics.sql
-- EMS Platform – ekonomické views (závisí na vw_site_effective_price)
-- Musí běžet až PO R__061_vw_site_effective_price.sql (číselný prefix Flyway).
-- Repeatable migration
--
-- Pozn.: při změně pořadí / názvů výstupních sloupců nestačí CREATE OR REPLACE VIEW —
-- PostgreSQL hlásí 42P16 („cannot change name of view column …“). Nejdřív DROP.
-- =============================================================

DROP VIEW IF EXISTS ems.vw_economics_daily CASCADE;
DROP VIEW IF EXISTS ems.vw_economics_interval CASCADE;

CREATE VIEW ems.vw_economics_interval AS
SELECT
    ai.site_id,
    ai.interval_start,
    -- Wh-based kWh (per-direction; u čistého importu/exportu max čítač vs. odhad z P_grid)
    ROUND(
        ems.fn_audit_grid_import_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        ) / 1000,
        4
    )
        AS import_kwh,
    ROUND(
        ems.fn_audit_grid_export_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        ) / 1000,
        4
    )
        AS export_kwh,
    -- Směrové cashflow: kolik Kč za import ze sítě / kolik Kč za export do sítě
    ROUND(
        ems.fn_audit_grid_import_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        )
        / 1000.0 * COALESCE(ep.effective_buy_price_czk_kwh, 0), 4
    ) AS grid_import_cashflow_czk,
    ROUND(
        ems.fn_audit_grid_export_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        )
        / 1000.0 * COALESCE(ep.effective_sell_price_czk_kwh, 0), 4
    ) AS grid_export_revenue_czk,
    -- Net cost (zpětná kompatibilita): import_cashflow - export_revenue
    ROUND(
        ems.fn_audit_grid_import_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        )
        / 1000.0 * COALESCE(ep.effective_buy_price_czk_kwh, 0)
      - ems.fn_audit_grid_export_wh_for_economics(
            ai.actual_grid_import_wh, ai.actual_grid_export_wh, ai.actual_grid_power_w
        )
        / 1000.0 * COALESCE(ep.effective_sell_price_czk_kwh, 0), 4
    ) AS dynamic_cost_czk,
    ai.actual_cost_czk                                                    AS stored_cost_czk,
    ai.green_bonus_czk,
    pi.expected_cost_czk                                                  AS planned_cost_czk,
    pi.grid_setpoint_w                                                    AS planned_grid_w,
    ai.actual_grid_power_w,
    ep.effective_buy_price_czk_kwh,
    ep.effective_sell_price_czk_kwh,
    pi.effective_buy_price                                                AS planned_buy_price,
    pi.effective_sell_price                                               AS planned_sell_price,
    ai.actual_pv_power_w,
    ai.actual_load_power_w,
    ai.actual_ev_power_w,
    ai.actual_heat_pump_power_w,
    ai.actual_battery_power_w,
    ai.actual_battery_soc_pct,
    ai.actual_grid_import_wh,
    ai.actual_grid_export_wh,
    ai.actual_batt_charge_wh,
    ai.actual_batt_discharge_wh,
    ai.actual_pv_production_wh,
    ai.actual_load_consumption_wh
FROM ems.audit_interval ai
LEFT JOIN ems.vw_site_effective_price ep
    ON ep.site_id = ai.site_id AND ep.interval_start = ai.interval_start
LEFT JOIN ems.planning_interval pi
    ON pi.run_id = ai.planning_run_id AND pi.interval_start = ai.interval_start;

COMMENT ON VIEW ems.vw_economics_interval IS
'Dynamické ekonomické vyhodnocení per 15min slot.
import/export kWh díky fn_audit_grid_*_wh_for_economics: primárně Wh z auditu (čítač Deye), u jednosměrného toku max s odhadem z průměrného grid_power_w (¼ h).
grid_import_cashflow_czk / grid_export_revenue_czk = směrové cashflow podle stejného Wh odhadu × efektivní cena.';

CREATE VIEW ems.vw_economics_daily AS
SELECT
    site_id,
    date_trunc('day', interval_start AT TIME ZONE 'Europe/Prague')::date AS day_local,
    COUNT(*)::int                                                         AS interval_count,
    ROUND(SUM(import_kwh), 3)                                            AS import_kwh,
    ROUND(SUM(export_kwh), 3)                                            AS export_kwh,
    ROUND(SUM(GREATEST(actual_pv_power_w, 0)::NUMERIC / 4000), 3)       AS pv_kwh,
    ROUND(SUM(GREATEST(actual_load_power_w, 0)::NUMERIC / 4000), 3)     AS load_kwh,
    ROUND(SUM(GREATEST(actual_ev_power_w, 0)::NUMERIC / 4000), 3)       AS ev_kwh,
    ROUND(SUM(GREATEST(actual_heat_pump_power_w, 0)::NUMERIC / 4000), 3) AS hp_kwh,
    ROUND(SUM(GREATEST(actual_pv_power_w, 0)::NUMERIC / 4000)
        - SUM(export_kwh), 3)                                            AS pv_self_consumption_kwh,
    -- Směrové cashflow (podle směru energie, ne znaménka peněz)
    ROUND(SUM(grid_import_cashflow_czk), 2)                              AS grid_import_cashflow_czk,
    ROUND(SUM(grid_export_revenue_czk), 2)                               AS grid_export_revenue_czk,
    -- Staré sloupce (podle znaménka peněz – zpětná kompatibilita)
    ROUND(SUM(CASE WHEN dynamic_cost_czk > 0
              THEN dynamic_cost_czk ELSE 0 END), 2)                      AS import_cost_czk,
    ROUND(SUM(CASE WHEN dynamic_cost_czk < 0
              THEN ABS(dynamic_cost_czk) ELSE 0 END), 2)                 AS export_revenue_czk,
    ROUND(SUM(dynamic_cost_czk), 2)                                      AS net_cost_czk,
    ROUND(COALESCE(SUM(green_bonus_czk), 0), 2)                         AS green_bonus_czk,
    ROUND(-SUM(dynamic_cost_czk)
        + COALESCE(SUM(green_bonus_czk), 0), 2)                         AS total_balance_czk,
    ROUND(SUM(planned_cost_czk), 2)                                      AS planned_net_cost_czk,
    ROUND(-COALESCE(SUM(planned_cost_czk), 0), 2)                       AS planned_balance_czk,
    ROUND(SUM(dynamic_cost_czk)
        - COALESCE(SUM(planned_cost_czk), 0), 2)                        AS deviation_cost_czk
FROM ems.vw_economics_interval
GROUP BY site_id,
         date_trunc('day', interval_start AT TIME ZONE 'Europe/Prague')::date;

COMMENT ON VIEW ems.vw_economics_daily IS
'Denní souhrn ekonomiky. planned_balance_czk = jen síťové náklady (bez zeleného bonusu).
grid_import_cashflow_czk / grid_export_revenue_czk = směrové cashflow podle skutečného toku energie.';
