<?php
$job_name = pathinfo(__FILE__, PATHINFO_FILENAME);
echo "[".date("Y-m-d H:i:s")."] ".$job_name." job is starting.\n";

set_time_limit(0); // No limit!

require('../../backend.php');
require('../common/QuoteApi.php');

$httpAuthToken = $savvyext->cfgReadChar('system.oauth2_token');
$encryptionAlg = $savvyext->cfgReadChar('encryption.algorithm');
$encryptionKey = $savvyext->cfgReadChar('encryption.key');
$encryptionIV = $savvyext->cfgReadChar('encryption.iv');

$baseURL = $savvyext->cfgReadChar('system.api_url');

$db_host = $savvyext->cfgReadChar('database.host');
$db_name = $savvyext->cfgReadChar('database.name');
$db_user = $savvyext->cfgReadChar('database.user');
$db_pass = $savvyext->cfgReadChar('database.pass');
$db_port = $savvyext->cfgReadLong('database.port');
$connstr = "host=${db_host} port=${db_port} dbname=${db_name} user=${db_user} password=${db_pass}";
$conn = pg_connect($connstr);

$member_id = 0;
$country = 'SG';
$timezone = 1; // Asia/Singapore
$distance = 2; // km 
$top_count = 15;

#Grab, ComfortDelGro, GOJEK
$transport_providers = [3,4,5];
$transport_providers = [4,5];

// Step 1: top 15 start locations
$locations_start = [];
$q = "SELECT COUNT(*) AS num, ROUND(b.latitude,2) AS lat, ROUND(b.longitude,2) AS lng ";
$q.= " FROM parsedemail_item a LEFT JOIN address b ON b.id=a.location_start_id ";
$q.= " WHERE b.timezone=${timezone} AND a.private='f' AND dup_id IS NULL ";
$q.= " GROUP BY b.latitude, b.longitude ORDER BY num DESC LIMIT ${top_count}";
$r = pg_query($conn, $q);
if ($r && pg_num_rows($r)) {
    $q1 = "select * from address where round(latitude,2)=%0.02f and round(longitude,2)=%0.02f order by random() limit 1";
    while ($f=pg_fetch_row($r)) {
        $r1 = pg_query($conn, sprintf($q1,$f[1],$f[2]));
        if ($r1 && pg_num_rows($r1) && $f1=pg_fetch_assoc($r1)) {
            $locations_start[] = $f1;
        }
    }
}

// Step 2: top 15 end locations
$locations_end = [];
$q = "SELECT COUNT(*) AS num, ROUND(b.latitude,2) AS lat, ROUND(b.longitude,2) AS lng ";
$q.= " FROM parsedemail_item a LEFT JOIN address b ON b.id=a.location_end_id ";
$q.= " WHERE b.timezone=${timezone} AND a.private='f' AND dup_id IS NULL ";
$q.= " GROUP BY b.latitude, b.longitude ORDER BY num DESC LIMIT ${top_count}";
$r = pg_query($conn, $q);
if ($r && pg_num_rows($r)) {
    $q1 = "select * from address where round(latitude,2)=%0.02f and round(longitude,2)=%0.02f order by random() limit 1";
    while ($f=pg_fetch_row($r)) {
        $r1 = pg_query($conn, sprintf($q1,$f[1],$f[2]));
        if ($r1 && pg_num_rows($r1) && $f1=pg_fetch_assoc($r1)) {
            $locations_end[] = $f1;
        }
    }
}
// Step 3: distance between locations (if makes sense to quote)
$pairs = [];
foreach ($locations_start as $location_start) {
    foreach ($locations_end as $location_end) {
        // Spheroid function in PHP to speed up
        $d = distanceBetweenTwoGpsCoordinates(
            $location_start["latitude"], $location_start["longitude"],
            $location_end["latitude"], $location_end["longitude"],
            "K"
        );
        if ($d>$distance) {
            $pairs[] = [$location_start, $location_end];
        }
    }
}

// Step 4: Schedule quotes
$checkQuotes = [];
QuoteApi::$job_name = $job_name;
foreach ($pairs as list($location_start, $location_end)) {
    $origin_id = $location_start["id"];
    $destination_id = $location_end["id"];
    $origin = $location_start["address"];
    $destination = $location_end["address"];
    foreach ($transport_providers as $transport_provider) {
        $q = "SELECT * FROM quotes ";
        $q.= " WHERE location_start_id=${origin_id} AND location_end_id=${destination_id} ";
        $q.= " AND transport_provider_id=${transport_provider} AND cost>0 ";
        $q.= " AND completed>(current_date-1) ";
        $q.= " ORDER BY completed DESC LIMIT 1";
        $r = pg_query($conn, $q);
        if ($r && pg_num_rows($r) && $f=pg_fetch_assoc($r)) {
            echo "[".date("Y-m-d H:i:s")."] Quote ".$f["cost"]." already exists ID #".$f["id"]."\n";
            continue;
        }
        list($res,$id) = QuoteApi::schedule_quote($origin,$destination,$country,$member_id,$transport_provider);
        if ($res>0) {
            if ($res==2) {
                echo "[".date("Y-m-d H:i:s")."] Quote complete! ID #${id}\n";
            } else if ($res==1) {
                echo "[".date("Y-m-d H:i:s")."] Scheduled quote ID #${id}\n";
                $checkQuotes[] = $id; 
            } else {
                echo "[".date("Y-m-d H:i:s")."] Unexpected result for ID #${id} ($res)\n";
            }
        } else {
            echo "[".date("Y-m-d H:i:s")."] schedule_quote failed: ${res}.\n";
            echo "[".date("Y-m-d H:i:s")."] $origin,$destination,$country,$member_id,$transport_provider\n";
        }
    }
}

// Step 5: Check quotes
foreach ($checkQuotes as $id) {
    list($res,$cost) = QuoteApi::check_quote($id);
    echo "[".date("Y-m-d H:i:s")."] Checking quote ID #${id} ($res) cost=${cost}\n";
}

function distanceBetweenTwoGpsCoordinates($lat1,$lon1,$lat2,$lon2,$unit) {
    //error_log("public function distanceBetweenTwoGpsCoordinates($lat1,$lon1,$lat2,$lon2,$unit)");
    if (($lat1 == $lat2) && ($lon1 == $lon2)) {
        return 0;
    }
    $theta = $lon1 - $lon2;
    $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
    $dist = acos($dist);
    $dist = rad2deg($dist);
    $miles = $dist * 60 * 1.1515;
    $unit = strtoupper($unit);
    if ($unit == "K") {
        return ($miles * 1.609344);
    }
    if ($unit == "N") {
        ($miles * 0.8684);
    }
    return $miles;
}


echo "[".date("Y-m-d H:i:s")."] ".$job_name." job complete.\n";