-- Query to get the latest status for each lane for pie chart display
-- Total lanes in system: minimum 201, or actual count if more lanes are added
WITH latest_records AS (
    SELECT
        Name,
        Full,
        Half_Full,
        Jam,
        Faulted,
        No_Container,
        Block_Operation,
        ROW_NUMBER() OVER (PARTITION BY Name ORDER BY t_stamp DESC) AS rn
    FROM lane_data
),
totals AS (
    SELECT
        GREATEST(COUNT(*), 201) AS total_lanes,
        SUM(CASE WHEN Jam = 1 THEN 1 ELSE 0 END) AS jammed_count,
        SUM(CASE WHEN Faulted = 1 THEN 1 ELSE 0 END) AS faulted_count,
        SUM(CASE WHEN Full = 1 THEN 1 ELSE 0 END) AS full_count,
        SUM(CASE WHEN Half_Full = 1 THEN 1 ELSE 0 END) AS half_full_count,
        SUM(CASE WHEN No_Container = 1 THEN 1 ELSE 0 END) AS no_container_count,
        SUM(CASE WHEN Block_Operation = 1 THEN 1 ELSE 0 END) AS block_operation_count
    FROM latest_records
    WHERE rn = 1
)
SELECT
    'Jammed' AS `Status`,
    COALESCE(jammed_count, 0) AS `Count`,
    ROUND(COALESCE(jammed_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals

UNION ALL

SELECT
    '50% Full' AS `Status`,
    COALESCE(half_full_count, 0) AS `Count`,
    ROUND(COALESCE(half_full_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals

UNION ALL

SELECT
    '100% Full' AS `Status`,
    COALESCE(full_count, 0) AS `Count`,
    ROUND(COALESCE(full_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals

UNION ALL

SELECT
    'Faulted' AS `Status`,
    COALESCE(faulted_count, 0) AS `Count`,
    ROUND(COALESCE(faulted_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals

UNION ALL

SELECT
    'No Container' AS `Status`,
    COALESCE(no_container_count, 0) AS `Count`,
    ROUND(COALESCE(no_container_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals

UNION ALL

SELECT
    'Blocked by Operator' AS `Status`,
    COALESCE(block_operation_count, 0) AS `Count`,
    ROUND(COALESCE(block_operation_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
FROM totals;