<?php
/**
 * Mill Projected Total - MSSQL Version (60 minute window)
 * 
 * Uses SQL Server archive table (row-based storage) instead of MySQL
 * 
 * Tags:
 *   - WTOTGROUND (ID: 342) - West Mill Total Ground
 *   - CANETOT (ID: 218) - East Mill Total Ground  
 *   - TotalGround (ID: 230) - Total Ground Since 5 AM
 */

$servername = "192.168.0.13\\SQLEXPRESS";
$username   = "opce";
$password   = "opcelasuca";
$dbname     = "history";

try {
    $pdo = new PDO(
        "sqlsrv:Server=$servername;Database=$dbname",
        $username,
        $password,
        [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        ]
    );
} catch (PDOException $e) {
    echo "0";
    return;
}

// Tag IDs
$eastId = 218;   // CANETOT
$westId = 342;   // WTOTGROUND
$totalId = 230;  // TotalGround

$query = "
    DECLARE @now DATETIME = GETDATE();
    DECLARE @oneHourAgo DATETIME = DATEADD(HOUR, -1, @now);
    
    -- Calculate hours remaining until 5 AM
    -- If before 5 AM, time until 5 AM today
    -- If after 5 AM, time until 5 AM tomorrow
    DECLARE @hoursRemaining FLOAT;
    DECLARE @targetTime DATETIME;
    
    IF CAST(@now AS TIME) < '05:00:00'
        SET @targetTime = CAST(CAST(@now AS DATE) AS DATETIME) + CAST('05:00:00' AS DATETIME)
    ELSE
        SET @targetTime = CAST(DATEADD(DAY, 1, CAST(@now AS DATE)) AS DATETIME) + CAST('05:00:00' AS DATETIME)
    
    SET @hoursRemaining = DATEDIFF(SECOND, @now, @targetTime) / 3600.0;
    
    -- Get latest East value
    DECLARE @eastLatest FLOAT = (
        SELECT TOP 1 Value 
        FROM dbo.archive 
        WHERE ID = :eastId 
        ORDER BY TimeStamp DESC
    );
    
    -- Get East value from ~60 minutes ago
    DECLARE @eastOld FLOAT = (
        SELECT TOP 1 Value 
        FROM dbo.archive 
        WHERE ID = :eastId2 AND TimeStamp <= @oneHourAgo
        ORDER BY TimeStamp DESC
    );
    
    -- Get latest West value
    DECLARE @westLatest FLOAT = (
        SELECT TOP 1 Value 
        FROM dbo.archive 
        WHERE ID = :westId 
        ORDER BY TimeStamp DESC
    );
    
    -- Get West value from ~60 minutes ago
    DECLARE @westOld FLOAT = (
        SELECT TOP 1 Value 
        FROM dbo.archive 
        WHERE ID = :westId2 AND TimeStamp <= @oneHourAgo
        ORDER BY TimeStamp DESC
    );
    
    -- Get current total ground
    DECLARE @totalGround FLOAT = (
        SELECT TOP 1 Value 
        FROM dbo.archive 
        WHERE ID = :totalId 
        ORDER BY TimeStamp DESC
    );
    
    -- Calculate rates (tons per hour)
    DECLARE @eastRate FLOAT = COALESCE(@eastLatest, 0) - COALESCE(@eastOld, 0);
    DECLARE @westRate FLOAT = COALESCE(@westLatest, 0) - COALESCE(@westOld, 0);
    
    -- Handle negative rates (mill reset or bad data)
    IF @eastRate < 0 SET @eastRate = 0;
    IF @westRate < 0 SET @westRate = 0;
    
    -- Calculate projection
    SELECT ROUND(
        ((@eastRate + @westRate) * @hoursRemaining) + COALESCE(@totalGround, 0),
        0
    ) AS millprojected;
";

try {
    $stmt = $pdo->prepare($query);
    $stmt->execute([
        ':eastId' => $eastId,
        ':eastId2' => $eastId,
        ':westId' => $westId,
        ':westId2' => $westId,
        ':totalId' => $totalId,
    ]);
    
    $result = $stmt->fetch();
    $projected = $result ? round($result['millprojected']) : 0;
    
} catch (PDOException $e) {
    $projected = 0;
}

$pdo = null;
?>
<?php echo $projected; ?>