-- =============================================================================
-- Отчет повременного учета работоспособности периферийного оборудования
-- Период: май 2026
-- Исключены устройства, начинающиеся на IRZ
-- Тип оборудования берется из инвентаризации Zabbix (поле type)
-- Координаты: широта + долгота из полей location_lat и location_lon
-- =============================================================================


WITH 
-- 1. Получаем все проверки ICMP за период
checks AS (
    SELECT 
        h.host AS host_name,
        COALESCE(h.name, h.host) AS visible_name,
        -- Тип оборудования из инвентаризации (поле type), если пусто - берем hardware
        COALESCE(hinv."name", 'не указан') AS equipment_type,
        -- Номер объекта ИТС РО (храним в поле notes инвентаризации)
        COALESCE(hinv.notes, '') AS object_number,
        -- Координаты: объединяем широту и долготу через пробел
        CASE 
            WHEN hinv.location_lat IS NOT NULL AND hinv.location_lon IS NOT NULL 
                 AND hinv.location_lat != '' AND hinv.location_lon != ''
            THEN hinv.location_lat || ' ' || hinv.location_lon
            WHEN hinv.location_lat IS NOT NULL AND hinv.location_lat != '' 
            THEN hinv.location_lat
            WHEN hinv.location_lon IS NOT NULL AND hinv.location_lon != '' 
            THEN hinv.location_lon
            ELSE ''
        END AS coordinates,
        -- Время проверки с учетом часового пояса
        TO_TIMESTAMP(hx.clock) AT TIME ZONE 'Europe/Moscow' AS ts,
        -- Статус: 1 = доступно, 0 = недоступно
        hx.value AS status
    FROM hosts h
    INNER JOIN items i 
        ON i.hostid = h.hostid 
        AND i.key_ = 'icmpping'
        AND i.status = 0
        AND i.value_type = 3  -- unsigned numeric
    INNER JOIN history_uint hx 
        ON hx.itemid = i.itemid
    LEFT JOIN host_inventory hinv 
        ON hinv.hostid = h.hostid
    WHERE 
        -- Только мониторимые хосты
        h.status = 0
        -- Исключаем оборудование, начинающееся на IRZ (любой регистр)
        --AND UPPER(h.host) NOT LIKE 'IRZ%'
        -- Период: май 2026 года (измените под свои даты)
        --and hinv.notes = 'ОБЪЕКТ № 12'
        --and hinv."name" = 'Видеокамера Trassir TR-D6254IR15'
        and CAST(nullif(regexp_replace(hinv.notes, 'ОБЪЕКТ №\s*', '', 'g'),'') as INTEGER) 
        between 1 and 85-- (44,77,43,54,27,48,12,49,65,9,60,35,38,1,51,41,53,84,8) 
        --AND hx.clock >= EXTRACT(EPOCH FROM TIMESTAMP '2026-06-01 00:00:00')
        --AND hx.clock < EXTRACT(EPOCH FROM TIMESTAMP '2026-06-05 00:00:00')
        AND TO_TIMESTAMP(hx.clock) >= to_date(${start_dt}, 'yyyymmdd') - interval '1 day'
        AND TO_TIMESTAMP(hx.clock) <= to_date(${end_dt}, 'yyyymmdd') + interval '1 day'  
        
),

-- 2. Добавляем предыдущий статус для определения моментов смены
checks_with_prev AS (
    SELECT 
        *,
        LAG(status) OVER (PARTITION BY host_name ORDER BY ts) AS prev_status,
        coalesce(lead(ts) OVER (PARTITION BY host_name ORDER BY ts), date_trunc('day', ts) + interval '1 day - 1 sec') AS next_ts
    FROM checks
),
--select * from (
-- 3. Определяем моменты смены статуса (начало нового интервала)
status_changes AS (
    SELECT 
        host_name,
	    visible_name,
	    equipment_type,
	    object_number,
	    coordinates,
	    ts,
	    status, 
	    prev_status,
	    case 
		    when DATE(next_ts) > DATE(ts) then date_trunc('day', ts) + interval '23:59:59'
	    	else next_ts - interval '1 sec'
	    end as next_ts, 
        CASE WHEN status != prev_status THEN 1 
            ELSE 0 
        END AS is_start,
	    case 
		    when DATE(next_ts) > DATE(ts) then 1
	    	else 0
	    end as is_24hh
    FROM checks_with_prev
    union all 
    SELECT
	    host_name,
	    visible_name,
	    equipment_type,
	    object_number,
	    coordinates,
	    date_trunc('day', next_ts) + interval '00:00:00' as ts,
	    status, 
	    prev_status,
	    next_ts - interval '1 sec',
	    1 as is_start,
	    0 as is_24hh
     FROM checks_with_prev
     where DATE(next_ts) > DATE(ts) --)f where status != prev_status and date_trunc('sec', ts) = date_trunc('sec', next_ts)
),

-- 4. Нумеруем интервалы для каждого устройства
intervals AS (
    SELECT 
        *,
        SUM(is_start) OVER (PARTITION BY host_name ORDER BY ts) AS interval_id
    FROM status_changes
    WHERE status IS NOT null
    and date_trunc('day', ts) >= to_date(${start_dt}, 'yyyymmdd') and date_trunc('day', ts) <= to_date(${end_dt}, 'yyyymmdd')
),

-- 5. Агрегируем каждый непрерывный интервал
grouped_intervals AS (
    SELECT 
        host_name,
        visible_name,
        equipment_type,
        object_number,
        coordinates,
        max(case when object_number similar to '%№%' then regexp_replace(object_number, 'ОБЪЕКТ №\s*', '', 'g')::int else null end) as object_num,
        MIN(ts) AS time_start,
        MAX(next_ts) AS time_end,
        MAX(status) AS status,        
        MAX(is_24hh) AS is_24hh
    FROM intervals
    GROUP BY 
        host_name, 
        visible_name,
        equipment_type,
        object_number,
        coordinates,
        interval_id
)

-- 6. Финальный вывод отчета
SELECT 
    ROW_NUMBER() OVER (order by object_num nulls last, equipment_type,time_start) AS "№ п/п",
    TO_CHAR(DATE(time_start), 'DD.MM.YYYY') AS "Дата",
    equipment_type as "Тип оборудования",
    case when object_num is null then 'на инвентаризации' else object_number end as "Номер_объекта_ИТС_РО",
    coordinates as "Координаты_расположения",
    TO_CHAR(time_start, 'yyyy-mm-dd HH24:MI:SS')::varchar AS "Время начала статуса",
    case when is_24hh = 1 then TO_CHAR(DATE(time_end), 'yyyy-mm-dd')::varchar || ' 24:00:00' 
    	else time_end::varchar end as "Время окончания статуса",
    CASE 
        WHEN status = 1 THEN 'доступно'
        ELSE 'недоступно'
    END AS "Статус"
FROM grouped_intervals
ORDER BY 1
;