<?php
// =============================================
// GOI Dashboard API - Order List (Full Version)
// GET /api/orders.php
//
// Parameters:
//   date_from  YYYYMMDD  (default: today)
//   date_to    YYYYMMDD  (default: today)
//   driver     d_drinitial e.g. M.K  (optional)
//
// Header:
//   X-API-Key: GOI_DASHBOARD_2026_SECRET
//
// Returns per driver per day:
//   - Forecast / Actual / Achievement%
//   - Total stops / Completed stops
//   - Departure / Arrival time
//   - Mileage start / finish
//   - Opening Balance / Cash In / Cash Out
//   - Cash Return / Gas / Extra / Total Balance
//   - Driver comment
// =============================================

require_once 'config.php';
validateApiKey();

$pdo = getDB();

// ── Forecast Cache 분기 ───────────────────────
if (($_GET['type'] ?? '') === 'forecast') {

    header('Content-Type: application/json');
    header('Access-Control-Allow-Origin: *');
    header('Access-Control-Allow-Methods: GET, POST, OPTIONS');

    if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
        http_response_code(204); exit;
    }

    $pdo  = getDB();
    $date = $_GET['date'] ?? date('Ymd');

    $pdo->exec("CREATE TABLE IF NOT EXISTS tbl_forecast_cache (
        fc_date    VARCHAR(8) NOT NULL PRIMARY KEY,
        fc_data    TEXT       NOT NULL,
        fc_updated DATETIME   DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
    )");

    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $body = json_decode(file_get_contents('php://input'), true);
        if (!$body) { echo json_encode(['success' => false, 'error' => 'Invalid JSON']); exit; }
        $st = $pdo->prepare("
            INSERT INTO tbl_forecast_cache (fc_date, fc_data)
            VALUES (:d, :data)
            ON DUPLICATE KEY UPDATE fc_data = VALUES(fc_data), fc_updated = NOW()
        ");
        $st->execute([':d' => $date, ':data' => json_encode($body)]);
        echo json_encode(['success' => true, 'date' => $date]);
    } else {
        $st = $pdo->prepare("SELECT fc_data, fc_updated FROM tbl_forecast_cache WHERE fc_date = :d");
        $st->execute([':d' => $date]);
        $row = $st->fetch(PDO::FETCH_ASSOC);
        echo json_encode([
            'success'    => true,
            'date'       => $date,
            'saved_at'   => $row ? $row['fc_updated'] : null,
            'data'       => $row ? json_decode($row['fc_data'], true) : null,
        ]);
    }
    exit;
}

// ── CS Dashboard 분기 ─────────────────────────
if (($_GET['type'] ?? '') === 'cs') {

    $dateFrom = $_GET['date_from'] ?? date('Ymd', strtotime('-30 days'));
    $dateTo   = $_GET['date_to']   ?? date('Ymd');
    $status   = $_GET['status']    ?? 'all';
    $today    = date('Ymd');

    // 1. SUMMARY KPIs
    $summary = [];
    $st = $pdo->prepare("SELECT COUNT(*) FROM tbl_request WHERE r_status='A' AND SUBSTR(r_createddate,1,8) BETWEEN :f AND :t");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $summary['total_pending'] = (int)$st->fetchColumn();

    $st = $pdo->prepare("SELECT COUNT(*) FROM tbl_request WHERE SUBSTR(r_createddate,1,8) = :d");
    $st->execute([':d' => $today]);
    $summary['today_new'] = (int)$st->fetchColumn();

    $st = $pdo->prepare("SELECT COUNT(*) FROM tbl_request WHERE r_status='F' AND SUBSTR(r_createddate,1,8) = :d");
    $st->execute([':d' => $today]);
    $summary['today_completed'] = (int)$st->fetchColumn();

    $st = $pdo->prepare("SELECT MIN(r_requestdate) FROM tbl_request WHERE r_status='A' AND SUBSTR(r_createddate,1,8) BETWEEN :f AND :t");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $oldest = $st->fetchColumn();
    $summary['oldest_pending_date'] = $oldest ?: null;
    if ($oldest && strlen($oldest) === 8) {
        $oDate = mktime(0,0,0,(int)substr($oldest,4,2),(int)substr($oldest,6,2),(int)substr($oldest,0,4));
        $summary['oldest_pending_days'] = (int)floor((time() - $oDate) / 86400);
    } else {
        $summary['oldest_pending_days'] = 0;
    }

    $st = $pdo->prepare("SELECT COUNT(*) FROM tbl_request WHERE SUBSTR(r_createddate,1,8) BETWEEN :f AND :t");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $summary['period_total'] = (int)$st->fetchColumn();

    $st = $pdo->prepare("SELECT COUNT(*) FROM tbl_request WHERE r_status='F' AND SUBSTR(r_createddate,1,8) BETWEEN :f AND :t");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $summary['period_completed'] = (int)$st->fetchColumn();

    // 2a. ALL PENDING (날짜 필터 없음 — 전체 미처리)
    $st = $pdo->query("
        SELECT r.r_uid AS id, r.r_requestdate AS request_date, r.r_accountno AS account,
               r.r_name AS customer_name, r.r_status AS status, r.r_note AS note,
               r.r_createddate AS created_at,
               COALESCE(c.c_area, '')    AS area,
               COALESCE(c.c_city, '')    AS city,
               COALESCE(c.c_phone, '')   AS phone,
               COALESCE(m.m_initial,  '') AS driver,
               COALESCE(NULLIF(m2.m_initial,''), m2.m_firstname, '?') AS staff
        FROM tbl_request r
        LEFT JOIN tbl_customer c  ON r.r_customeruid = c.c_uid
        LEFT JOIN tbl_member   m  ON r.r_driveruid   = m.m_uid
        LEFT JOIN tbl_member   m2 ON r.r_memberuid   = m2.m_uid
        WHERE r.r_status = 'A'
        ORDER BY r.r_requestdate DESC, r.r_uid DESC
        LIMIT 20000
    ");
    $allPending = $st->fetchAll(PDO::FETCH_ASSOC);
    foreach ($allPending as &$row) {
        $d = $row['request_date'];
        $row['request_date_fmt'] = strlen($d) === 8
            ? substr($d,0,4).'-'.substr($d,4,2).'-'.substr($d,6,2) : $d;
        $oDate = mktime(0,0,0,(int)substr($d,4,2),(int)substr($d,6,2),(int)substr($d,0,4));
        $row['days_pending'] = (int)floor((time() - $oDate) / 86400);
    }
    unset($row);

    // 2b. PERIOD REQUESTS (기간 필터 — 전체 요청 탭용)
    $where  = ["SUBSTR(r.r_createddate,1,8) BETWEEN :date_from AND :date_to"];
    $params = [':date_from' => $dateFrom, ':date_to' => $dateTo];
    $sql = "
        SELECT r.r_uid AS id, r.r_requestdate AS request_date, r.r_accountno AS account,
               r.r_name AS customer_name, r.r_status AS status, r.r_note AS note,
               r.r_createddate AS created_at,
               COALESCE(c.c_area, '')     AS area,
               COALESCE(c.c_city, '')     AS city,
               COALESCE(c.c_phone, '')    AS phone,
               COALESCE(m.m_initial,  '') AS driver,
               COALESCE(NULLIF(m2.m_initial,''), m2.m_firstname, '?') AS staff
        FROM tbl_request r
        LEFT JOIN tbl_customer c  ON r.r_customeruid = c.c_uid
        LEFT JOIN tbl_member   m  ON r.r_driveruid   = m.m_uid
        LEFT JOIN tbl_member   m2 ON r.r_memberuid   = m2.m_uid
        WHERE " . implode(" AND ", $where) . "
        ORDER BY r.r_requestdate DESC, r.r_uid DESC
        LIMIT 500
    ";
    $st = $pdo->prepare($sql);
    $st->execute($params);
    $requests = $st->fetchAll(PDO::FETCH_ASSOC);

    foreach ($requests as &$row) {
        $d = $row['request_date'];
        $row['request_date_fmt'] = strlen($d) === 8
            ? substr($d,0,4).'-'.substr($d,4,2).'-'.substr($d,6,2) : $d;
        if ($row['status'] === 'A' && strlen($d) === 8) {
            $oDate = mktime(0,0,0,(int)substr($d,4,2),(int)substr($d,6,2),(int)substr($d,0,4));
            $row['days_pending'] = (int)floor((time() - $oDate) / 86400);
        } else {
            $row['days_pending'] = 0;
        }
    }
    unset($row);

    // 3. STAFF BREAKDOWN (접수자별 통계)
    $st = $pdo->prepare("
        SELECT
            COALESCE(NULLIF(m2.m_initial,''), m2.m_firstname, '?') AS staff,
            COUNT(*)                                              AS total,
            SUM(CASE WHEN r.r_status='A' THEN 1 ELSE 0 END)      AS pending,
            SUM(CASE WHEN r.r_status='F' THEN 1 ELSE 0 END)      AS completed
        FROM tbl_request r
        LEFT JOIN tbl_member m2 ON r.r_memberuid = m2.m_uid
        WHERE SUBSTR(r.r_createddate,1,8) BETWEEN :f AND :t
        GROUP BY r.r_memberuid, m2.m_initial
        ORDER BY total DESC
    ");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $byStaff = $st->fetchAll(PDO::FETCH_ASSOC);

    // 4. DRIVER BREAKDOWN
    $st = $pdo->prepare("
        SELECT COALESCE(m.m_initial, '?') AS driver,
               COUNT(*) AS total,
               SUM(CASE WHEN r.r_status='A' THEN 1 ELSE 0 END) AS pending,
               SUM(CASE WHEN r.r_status='F' THEN 1 ELSE 0 END) AS completed
        FROM tbl_request r
        LEFT JOIN tbl_member m ON r.r_driveruid = m.m_uid
        WHERE r.r_requestdate BETWEEN :f AND :t
        GROUP BY r.r_driveruid, m.m_initial
        ORDER BY pending DESC, total DESC
    ");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $byDriver = $st->fetchAll(PDO::FETCH_ASSOC);

    // 4. NOTES (type A + D)
    $st = $pdo->prepare("
        SELECT n.n_uid AS id, n.n_type AS type, n.n_note AS note,
               n.n_createddate AS created_at,
               COALESCE(c.c_name,      '') AS customer_name,
               COALESCE(c.c_accountno, '') AS account,
               COALESCE(c.c_area,      '') AS area,
               COALESCE(c.c_city,      '') AS city,
               COALESCE(CONCAT(m.m_firstname,' ',m.m_lastname), '') AS author
        FROM tbl_note n
        LEFT JOIN tbl_customer c ON n.n_customeruid = c.c_uid
        LEFT JOIN tbl_member   m ON n.n_memberuid   = m.m_uid
        WHERE n.n_status = 'A' AND n.n_type IN ('A','D')
          AND SUBSTR(n.n_createddate,1,8) BETWEEN :f AND :t
        ORDER BY n.n_createddate DESC
        LIMIT 300
    ");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $notes = $st->fetchAll(PDO::FETCH_ASSOC);

    foreach ($notes as &$n) {
        $d = substr($n['created_at'], 0, 8);
        $n['date_fmt'] = strlen($d) === 8
            ? substr($d,0,4).'-'.substr($d,4,2).'-'.substr($d,6,2) : $d;
    }
    unset($n);

    // 5. AREA BREAKDOWN
    $st = $pdo->prepare("
        SELECT COALESCE(NULLIF(c.c_area,''), c.c_city, '기타') AS area,
               COUNT(*) AS total
        FROM tbl_request r
        LEFT JOIN tbl_customer c ON r.r_customeruid = c.c_uid
        WHERE SUBSTR(r.r_createddate,1,8) BETWEEN :f AND :t
        GROUP BY area
        ORDER BY total DESC
    ");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $byArea = $st->fetchAll(PDO::FETCH_ASSOC);

    // 6. DAILY BREAKDOWN (접수일 기준)
    $st = $pdo->prepare("
        SELECT SUBSTR(r_createddate,1,8) AS date,
               COUNT(*) AS total,
               SUM(CASE WHEN r_status='F' THEN 1 ELSE 0 END) AS completed,
               SUM(CASE WHEN r_status='A' THEN 1 ELSE 0 END) AS pending
        FROM tbl_request
        WHERE SUBSTR(r_createddate,1,8) BETWEEN :f AND :t
        GROUP BY SUBSTR(r_createddate,1,8)
        ORDER BY SUBSTR(r_createddate,1,8) ASC
    ");
    $st->execute([':f' => $dateFrom, ':t' => $dateTo]);
    $byDay = $st->fetchAll(PDO::FETCH_ASSOC);

    jsonResponse([
        'success'     => true,
        'date_from'   => $dateFrom,
        'date_to'     => $dateTo,
        'summary'     => $summary,
        'all_pending' => $allPending,
        'requests'    => $requests,
        'by_driver'   => $byDriver,
        'by_staff'    => $byStaff,
        'by_area'     => $byArea,
        'by_day'      => $byDay,
        'notes'       => $notes,
    ]);
    exit;
}
// ─────────────────────────────────────────────

// 날짜 파라미터 (DB 형식: YYYYMMDD varchar)
$dateFrom = $_GET['date_from'] ?? date('Ymd');
$dateTo   = $_GET['date_to']   ?? date('Ymd');
$driver   = $_GET['driver']    ?? null;

// 날짜 형식 검증 (8자리 숫자)
if (!preg_match('/^\d{8}$/', $dateFrom) || !preg_match('/^\d{8}$/', $dateTo)) {
    http_response_code(400);
    jsonResponse(['success' => false, 'error' => 'Invalid date format. Use YYYYMMDD (e.g. 20260521)']);
}

// =============================================
// 메인 쿼리
// tbl_daily      → 수거 데이터 (Forecast, Actual, Stops)
// tbl_member     → 드라이버 조인 조건
// tbl_memberhis  → 출퇴근/Cash 데이터 (LEFT JOIN: 없어도 수거 데이터는 나옴)
// =============================================
$sql = "
    SELECT
        d.d_orderdate                                           AS order_date,
        d.d_druid                                               AS driver_uid,
        d.d_drinitial                                           AS driver,

        -- 수거 데이터
        COUNT(*)                                                AS total_stops,
        COUNT(CASE WHEN d.d_status = 'F' THEN 1 END)           AS completed_stops,
        COALESCE(SUM(d.d_estquantity), 0)                       AS forecast,
        COALESCE(SUM(d.d_quantity), 0)                          AS actual,

        -- 출퇴근 시간 (tbl_memberhis)
        h.h_departuretime                                       AS departure,
        h.h_arrivaltime                                         AS arrival,

        -- 마일리지 (tbl_memberhis)
        h.h_mileage_s                                           AS mileage_start,
        h.h_mileage_f                                           AS mileage_finish,

        -- Cash 데이터 (tbl_memberhis)
        COALESCE(h.h_balance_o, 0)                              AS opening_balance,
        COALESCE(h.h_balance_in, 0)                             AS cash_in,
        COALESCE(h.h_balance_out, 0)                            AS cash_out,
        COALESCE(h.h_balance_r, 0)                              AS cash_return,
        COALESCE(h.h_balance_g, 0)                              AS gas,
        COALESCE(h.h_balance_e, 0)                              AS extra,
        COALESCE(h.h_balance_t, 0)                              AS balance_total,

        -- 드라이버 코멘트
        h.h_comment                                             AS comment

    FROM tbl_daily d
    INNER JOIN (
        SELECT DISTINCT m_currentdriver FROM tbl_member WHERE m_currentdriver IS NOT NULL
    ) m ON (d.d_druid = m.m_currentdriver)
    LEFT JOIN tbl_memberhis h
        ON (d.d_druid = h.h_druid AND d.d_orderdate = h.h_date)
    WHERE d.d_orderdate BETWEEN :date_from AND :date_to
";

if ($driver) {
    $sql .= " AND d.d_drinitial = :driver ";
}

$sql .= "
    GROUP BY
        d.d_orderdate,
        d.d_drinitial,
        d.d_druid,
        h.h_departuretime,
        h.h_arrivaltime,
        h.h_mileage_s,
        h.h_mileage_f,
        h.h_balance_o,
        h.h_balance_in,
        h.h_balance_out,
        h.h_balance_r,
        h.h_balance_g,
        h.h_balance_e,
        h.h_balance_t,
        h.h_comment
    ORDER BY d.d_orderdate DESC, d.d_drinitial ASC
";

$stmt = $pdo->prepare($sql);
$stmt->bindParam(':date_from', $dateFrom);
$stmt->bindParam(':date_to',   $dateTo);
if ($driver) {
    $stmt->bindParam(':driver', $driver);
}
$stmt->execute();
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);

// =============================================
// 계산 컬럼 추가
// =============================================
foreach ($rows as &$row) {

    // 날짜 포맷 변환 YYYYMMDD → YYYY-MM-DD
    $d = $row['order_date'];
    if (strlen($d) === 8) {
        $row['order_date_formatted'] = substr($d,0,4).'-'.substr($d,4,2).'-'.substr($d,6,2);
    }

    // 달성률 (%)
    $fc = floatval($row['forecast']);
    $ac = floatval($row['actual']);
    $row['achievement_pct'] = $fc > 0 ? round($ac / $fc * 100, 1) : 0;

    // 잔여 수거량
    $row['remaining'] = max($fc - $ac, 0);

    // 진행 상태
    if ($ac <= 0)       $row['status'] = 'Pending';
    elseif ($ac >= $fc) $row['status'] = 'Done';
    else                $row['status'] = 'In Progress';

    // 마일리지 주행거리
    $ms = intval($row['mileage_start']);
    $mf = intval($row['mileage_finish']);
    $row['mileage_driven'] = ($ms > 0 && $mf > 0) ? max($mf - $ms, 0) : null;
}
unset($row);

jsonResponse([
    'success'   => true,
    'date_from' => $dateFrom,
    'date_to'   => $dateTo,
    'count'     => count($rows),
    'data'      => $rows
]);