<?php
/*
 * Aggregierte Energiedaten für die Historie-Seite.
 * Ersetzt getConsData_{month,year,decade}.php und getProdData_{month,year,decade}.php.
 *
 * Aufruf: energyHistory.php?series=prod|cons&range=month|year|decade
 */

require_once("../helper.php");
require_once("./chartData.php");

// Zeitraum -> [Format der Beschriftung, Filter auf datetime]
$ranges = [
    "month"  => ["'%d.%b.'", "DATE_FORMAT(datetime,'%Y%m%d') >= DATE_FORMAT(DATE_SUB(now(),INTERVAL 1 MONTH),'%Y%m%d')"],
    "year"   => ["'%b. %y'", "DATE_FORMAT(datetime,'%Y%m')   >= DATE_FORMAT(DATE_SUB(now(),INTERVAL 13 MONTH),'%Y%m')"],
    "decade" => ["'%Y'",     "DATE_FORMAT(datetime,'%Y')     >= DATE_FORMAT(DATE_SUB(now(),INTERVAL 10 YEAR),'%Y')"],
];

// Datenreihen je Diagramm. Beide teilen sich Solarertrag und Heizstab und
// unterscheiden sich nur darin, wohin die Energie fließt (prod) bzw. woher
// sie kommt (cons).
$series = [
    "prod" => "SUM(pvP/12 - IF(gridP < 0, -gridP/12,0) - IF(battP < 0, -battP/12,0) - heaterPwr/12) AS Direktverbrauch,
  SUM(heaterPwr/12) AS Heizstab,
  SUM(IF(battP < 0, -battP/12,0)) AS Batterieladung,
  SUM(gridPfeed/12) AS Einspeisung",
    "cons" => "SUM(pvP/12 - IF(gridP < 0, -gridP/12,0) - IF(battP < 0, -battP/12,0) - heaterPwr/12) AS Solarverbrauch,
  SUM(heaterPwr/12) AS Heizstab,
  SUM(IF(battP > 0, battP/12,0)) AS Batteriebezug,
  SUM(gridPcons/12) AS Netzbezug",
];

$linecolors["Direktverbrauch"] = "#FFFF00";
$linecolors["Solarverbrauch"]  = "#FFFF00";
$linecolors["UG"]              = "#FFaa00";
$linecolors["OG"]              = "#FF4400";
$linecolors["Auto UG"]         = "#00aaFF";
$linecolors["Auto OG"]         = "#0044FF";
$linecolors["Heizstab"]        = "#FF6600";
$linecolors["Batterieladung"]  = "#00aa00";
$linecolors["Batteriebezug"]   = "#00aa00";
$linecolors["Einspeisung"]     = "#FF0000";
$linecolors["Netzbezug"]       = "#FF0000";
$linecolors["Ladestand"]       = "#00aa00";
$linecolors["Vorhersage"]      = "#2222FF";

header('Content-Type: application/json; charset=utf-8');

$rangeKey = isset($_GET["range"]) ? $_GET["range"] : "";
$seriesKey = isset($_GET["series"]) ? $_GET["series"] : "";
if (!isset($ranges[$rangeKey]) || !isset($series[$seriesKey])) {
    http_response_code(400);
    echo json_encode(["error" => "Unbekannter Zeitraum oder Datenreihe."]);
    exit;
}
list($labelFormat, $filter) = $ranges[$rangeKey];

$obj = (object)[];
$obj->labels = [];
$obj->datasets = [];

if (checkLogin()) {
    $mysql = new mysqli($mysql_server, $mysql_solarUser, $mysql_solarPass, $mysql_solarDB);
    $query = "SELECT
  DATE_FORMAT(datetime, $labelFormat) AS 'time',
  " . $series[$seriesKey] . "
FROM EnergyFlow
  WHERE $filter
  GROUP BY DATE_FORMAT(datetime, $labelFormat)
ORDER BY datetime ; ";
    $obj = buildChartData($mysql, $query, $linecolors);
}

echo json_encode($obj);