<?php
// views/tab_stats.php
require_once __DIR__ . '/../includes/db.php';
require_once __DIR__ . '/../includes/sql_config.php';

$show_sql_log_btn = 'N';
$isStatsAjax = isset($_GET['ajax_stats']) && $_GET['ajax_stats'] == '1';

// =========================================================================
// 1. ส่วนประมวลผล AJAX ดึงข้อมูลสถิติจากฐานข้อมูล
// =========================================================================
if ($isStatsAjax) {
    while (ob_get_level()) {
        ob_end_clean();
    }
    header('Content-Type: application/json; charset=utf-8');

    $current_month = (int)date('m');
    $current_year = (int)date('Y');
    $current_fy = ($current_month >= 10) ? $current_year + 1 : $current_year;
    $filter_type = $_GET['filter_type'] ?? 'fiscal';
    $selected_fy = isset($_GET['fiscal_year']) ? (int)$_GET['fiscal_year'] : $current_fy;

    if ($selected_fy > 2500) {
        $selected_fy -= 543;
    }

    if ($filter_type === 'fiscal') {
        $start_date = ($selected_fy - 1) . '-10-01';
        $end_date   = $selected_fy . '-09-30';
    } else {
        $start_date = $_GET['start_date'] ?? date('Y-m-01');
        $end_date   = $_GET['end_date'] ?? date('Y-m-d');
        $s_parts = explode('-', $start_date);
        if (count($s_parts) === 3 && (int)$s_parts[0] > 2500) {
            $s_parts[0] = (int)$s_parts[0] - 543;
            $start_date = implode('-', $s_parts);
        }
        $e_parts = explode('-', $end_date);
        if (count($e_parts) === 3 && (int)$e_parts[0] > 2500) {
            $e_parts[0] = (int)$e_parts[0] - 543;
            $end_date = implode('-', $e_parts);
        }
    }

    $response = [
        'disease_opd' => [],
        'disease_ipd' => [],
        'disease_ipd_death' => [],
        'disease_er_death' => [],
        'refer_overview' => [],
        'refer_ambulance' => [],
        'refer_ship' => [],
        'refer_air' => [],
        'service_totals' => ['opd' => 0, 'ipd' => 0, 'er' => 0, 'ipd_death' => 0, 'er_death' => 0, 'doa' => 0],
        'service_rights' => ['labels' => [], 'data' => []],
        'nationality' => ['thai' => ['opd' => 0, 'ipd' => 0], 'foreign' => ['opd' => 0, 'ipd' => 0], 'alien' => ['opd' => 0, 'ipd' => 0]],
        'cmi_avg' => 0,
        'adjrw_sum' => 0,
        'trend_cmi' => ['labels' => [], 'data' => []],
        'trend_adjrw' => ['labels' => [], 'data' => []],
        'display_start' => date('d/m/Y', strtotime($start_date)),
        'display_end' => date('d/m/Y', strtotime($end_date)),
        'sql_logs' => [],
        'debug_enabled' => ($show_sql_log_btn === 'Y')
    ];

    $addLog = function ($name, $sql, $error = null) use (&$response) {
        $response['sql_logs'][] = ['name' => $name, 'sql' => trim(preg_replace('/\s+/', ' ', $sql)), 'status' => $error ? 'Error' : 'Success', 'error' => $error];
    };
    $addLog('ระบบตรวจสอบช่วงวันที่ Stats', "ค้นหาข้อมูลตั้งแต่วันที่: $start_date ถึง $end_date");

    $to_utf8 = function ($str) {
        if (empty($str)) return 'ไม่ระบุ';
        if (!mb_check_encoding($str, 'UTF-8')) return @iconv('TIS-620', 'UTF-8//IGNORE', $str);
        return $str;
    };

    $thai_months = ['01' => 'ม.ค.', '02' => 'ก.พ.', '03' => 'มี.ค.', '04' => 'เม.ย.', '05' => 'พ.ค.', '06' => 'มิ.ย.', '07' => 'ก.ค.', '08' => 'ส.ค.', '09' => 'ก.ย.', '10' => 'ต.ค.', '11' => 'พ.ย.', '12' => 'ธ.ค.'];

    if ($pdo) {
        // --- 1. สถิติโรค (10 อันดับโรค) ---
        $queries_disease = [
            'disease_opd' => [$sql_config['stats']['disease_opd'] ?? "SELECT v.icd10, i.name, count(v.vn) as a FROM ovstdiag v LEFT JOIN icd101 i ON v.icd10=i.code WHERE v.vstdate BETWEEN :start AND :end AND v.diagtype='1' GROUP BY v.icd10, i.name ORDER BY a DESC LIMIT 10", "10 อันดับโรคผู้ป่วยนอก (OPD)"],
            'disease_ipd' => [$sql_config['stats']['disease_ipd'] ?? "SELECT v.icd10, i.name, count(v.an) as a FROM iptdiag v LEFT JOIN ipt ip ON v.an=ip.an LEFT JOIN icd101 i ON v.icd10=i.code WHERE ip.dchdate BETWEEN :start AND :end AND v.diagtype='1' GROUP BY v.icd10, i.name ORDER BY a DESC LIMIT 10", "10 อันดับโรคผู้ป่วยใน (IPD)"],
            'disease_ipd_death' => [$sql_config['stats']['disease_ipd_death'] ?? "SELECT v.icd10, i.name, count(v.an) as a FROM iptdiag v LEFT JOIN ipt ip ON v.an=ip.an LEFT JOIN icd101 i ON v.icd10=i.code WHERE ip.dchdate BETWEEN :start AND :end AND v.diagtype='1' AND ip.dchtype IN ('08','09') GROUP BY v.icd10, i.name ORDER BY a DESC LIMIT 10", "10 อันดับเสียชีวิต IPD"],
            'disease_er_death' => [$sql_config['stats']['disease_er_death'] ?? "SELECT v.icd10, i.name, count(v.vn) as a FROM ovstdiag v LEFT JOIN icd101 i ON v.icd10=i.code WHERE v.vstdate BETWEEN :start AND :end AND v.diagtype='1' AND v.vn IN(SELECT vn FROM er_regist WHERE er_dch_type='4') GROUP BY v.icd10, i.name ORDER BY a DESC LIMIT 10", "10 อันดับเสียชีวิตที่ ER"]
        ];
        foreach ($queries_disease as $key => $q) {
            try {
                $stmt = $pdo->prepare($q[0]);
                $stmt->execute(['start' => $start_date, 'end' => $end_date]);
                while ($r = $stmt->fetch()) {
                    $response[$key][] = ['name' => $to_utf8($r['name']) . " ({$r['icd10']})", 'val' => (int)$r['a']];
                }
                $addLog($q[1], $q[0]);
            } catch (\Exception $e) {
                $addLog($q[1], $q[0], $e->getMessage());
            }
        }

        // --- 2. 10 อันดับโรคส่งต่อ (Refer) ---
        $queries_refer = [
            'refer_overview' => [$sql_config['stats']['refer_overview'] ?? "SELECT a.pdx, ic.name as icd10, count(a.pdx) as pdxcount FROM referout a LEFT JOIN icd101 ic ON a.pdx=ic.code WHERE a.refer_date BETWEEN :start AND :end AND ic.name IS NOT NULL AND a.pdx !='U000' GROUP BY a.pdx ORDER BY pdxcount DESC LIMIT 10", "ภาพรวมโรคส่งต่อ (Refer Out)"],
            'refer_ambulance' => [$sql_config['stats']['refer_ambulance'] ?? "SELECT a.pdx, ic.name as icd10, count(a.pdx) as pdxcount FROM referout a LEFT JOIN icd101 ic ON a.pdx=ic.code WHERE a.refer_date BETWEEN :start AND :end AND ic.name IS NOT NULL AND a.with_ambulance='Y' AND a.pdx !='U000' GROUP BY a.pdx ORDER BY pdxcount DESC LIMIT 10", "10 อันดับโรคส่งต่อด้วยรถพยาบาล"],
            'refer_ship' => [$sql_config['stats']['refer_ship'] ?? "SELECT a.pdx, ic.name as icd10, count(a.pdx) as pdxcount FROM referout a LEFT JOIN opitemrece op ON a.vn=op.vn LEFT JOIN icd101 ic ON a.pdx=ic.code WHERE a.refer_date BETWEEN :start AND :end AND ic.name IS NOT NULL AND a.pdx !='U000' AND op.icode IN ('3162878','3162879','3162880','3162881','3162882','3162883','3162884','3162885') GROUP BY a.pdx ORDER BY pdxcount DESC LIMIT 10", "10 อันดับโรคส่งต่อทางเรือ"],
            'refer_air' => [$sql_config['stats']['refer_air'] ?? "SELECT a.pdx, ic.name as icd10, count(a.pdx) as pdxcount FROM referout a LEFT JOIN opitemrece op ON a.vn=op.vn LEFT JOIN icd101 ic ON a.pdx=ic.code WHERE a.refer_date BETWEEN :start AND :end AND ic.name IS NOT NULL AND a.pdx !='U000' AND op.icode IN ('3162862','3162863','3162864','3162865','3162866','3162867','3162868','3162869','3162870','3162871','3162872','3162873','3162874','3162875','3162876','3162877','3163699','3163891') GROUP BY a.pdx ORDER BY pdxcount DESC LIMIT 10", "10 อันดับโรคส่งต่อทางอากาศ"]
        ];
        foreach ($queries_refer as $key => $q) {
            try {
                $stmt = $pdo->prepare($q[0]);
                $stmt->execute(['start' => $start_date, 'end' => $end_date]);
                while ($r = $stmt->fetch()) {
                    $response[$key][] = ['name' => $to_utf8($r['icd10']), 'val' => (int)$r['pdxcount']];
                }
                $addLog($q[1], $q[0]);
            } catch (\Exception $e) {
                $addLog($q[1], $q[0], $e->getMessage());
            }
        }

        // --- 3. สถิติรับบริการรวม (Totals) ---
        $queries_totals = [
            'opd' => [$sql_config['stats']['total_opd'] ?? "SELECT count(distinct vn) FROM ovst WHERE vstdate BETWEEN :start AND :end AND an IS NULL", "ยอดรวมผู้ป่วยนอก (OPD)"],
            'ipd' => [$sql_config['stats']['total_ipd'] ?? "SELECT count(distinct an) FROM ipt WHERE dchdate BETWEEN :start AND :end", "ยอดรวมผู้ป่วยใน (IPD)"],
            'er' => [$sql_config['stats']['total_er'] ?? "SELECT count(distinct vn) FROM ovst WHERE vstdate BETWEEN :start AND :end AND vn IN(SELECT vn FROM er_regist)", "ยอดรวมอุบัติเหตุ (ER)"],
            'ipd_death' => [$sql_config['stats']['total_ipd_death'] ?? "SELECT count(distinct an) FROM ipt WHERE dchdate BETWEEN :start AND :end AND dchtype IN('08','09')", "จำนวนการเสียชีวิตผู้ป่วยใน"],
            'er_death' => [$sql_config['stats']['total_er_death'] ?? "SELECT count(distinct vn) FROM ovst WHERE vstdate BETWEEN :start AND :end AND vn IN(SELECT vn FROM er_regist WHERE er_dch_type='4')", "จำนวนการเสียชีวิตที่ ER"],
            'doa' => [$sql_config['stats']['total_doa'] ?? "SELECT count(distinct vn) FROM ovst WHERE vstdate BETWEEN :start AND :end AND vn IN(SELECT vn FROM er_regist WHERE dba='Y')", "เสียชีวิตก่อนถึง รพ. (DOA/DBA)"]
        ];
        foreach ($queries_totals as $key => $q) {
            try {
                $stmt = $pdo->prepare($q[0]);
                $stmt->execute(['start' => $start_date, 'end' => $end_date]);
                $response['service_totals'][$key] = (int)$stmt->fetchColumn();
                $addLog($q[1], $q[0]);
            } catch (\Exception $e) {
                $addLog($q[1], $q[0], $e->getMessage());
            }
        }

        // --- 4. สัดส่วนสิทธิการรักษา ---
        $sql_rights = $sql_config['stats']['service_rights'] ?? "SELECT count(distinct a.vn) as a, c.pttype_spp_name FROM ovst a LEFT JOIN pttype b ON a.pttype=b.pttype LEFT JOIN pttype_spp c ON b.pttype_spp_id=c.pttype_spp_id WHERE a.vstdate BETWEEN :start AND :end GROUP BY b.pttype_spp_id";
        try {
            $stmt = $pdo->prepare($sql_rights);
            $stmt->execute(['start' => $start_date, 'end' => $end_date]);
            while ($r = $stmt->fetch()) {
                $response['service_rights']['labels'][] = $to_utf8($r['pttype_spp_name']);
                $response['service_rights']['data'][] = (int)$r['a'];
            }
            $addLog('สัดส่วนสิทธิการรักษา', $sql_rights);
        } catch (\Exception $e) {
            $addLog('สัดส่วนสิทธิการรักษา', $sql_rights, $e->getMessage());
        }

        // --- 5. สัญชาติ ---
        $queries_nat = [
            'thai_opd' => [$sql_config['stats']['thai_opd'] ?? "SELECT count(distinct a.vn) as a ,AEC_SAMUI FROM ovst a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.vstdate BETWEEN :start AND :end AND AEC_SAMUI IN('N','P','T') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "สัญชาติไทย OPD"],
            'thai_ipd' => [$sql_config['stats']['thai_ipd'] ?? "SELECT count(distinct a.an) as a ,AEC_SAMUI FROM ipt a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.dchdate BETWEEN :start AND :end AND AEC_SAMUI IN('N','P','T') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "สัญชาติไทย IPD"],
            'foreign_opd' => [$sql_config['stats']['foreign_opd'] ?? "SELECT count(distinct a.vn) as a ,AEC_SAMUI FROM ovst a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.vstdate BETWEEN :start AND :end AND AEC_SAMUI IN('F') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "ต่างชาติ OPD"],
            'foreign_ipd' => [$sql_config['stats']['foreign_ipd'] ?? "SELECT count(distinct a.an) as a ,AEC_SAMUI FROM ipt a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.dchdate BETWEEN :start AND :end AND AEC_SAMUI IN('F') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "ต่างชาติ IPD"],
            'alien_opd' => [$sql_config['stats']['alien_opd'] ?? "SELECT count(distinct a.vn) as a ,AEC_SAMUI FROM ovst a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.vstdate BETWEEN :start AND :end AND AEC_SAMUI IN('ํY','Y') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "ต่างด้าว OPD"],
            'alien_ipd' => [$sql_config['stats']['alien_ipd'] ?? "SELECT count(distinct a.an) as a ,AEC_SAMUI FROM ipt a LEFT OUTER JOIN patient p ON a.hn=p.hn LEFT OUTER JOIN nationality n ON p.nationality=n.nationality WHERE a.dchdate BETWEEN :start AND :end AND AEC_SAMUI IN('Y','ํY') AND p.nationality IS NOT NULL AND AEC_SAMUI IS NOT NULL GROUP BY AEC_SAMUI", "ต่างด้าว IPD"]
        ];

        foreach ($queries_nat as $key => $q) {
            try {
                $stmt = $pdo->prepare($q[0]);
                $stmt->execute(['start' => $start_date, 'end' => $end_date]);
                $sum = 0;
                while ($r = $stmt->fetch()) {
                    $sum += (int)$r['a'];
                }
                $parts = explode('_', $key);
                $response['nationality'][$parts[0]][$parts[1]] = $sum;
                $addLog($q[1], $q[0]);
            } catch (\Exception $e) {
                $addLog($q[1], $q[0], $e->getMessage());
            }
        }

        // --- 6. CMI และ AdjRW (ภาพรวม + กราฟรายเดือน) ---
        try {
            $sql_cmi_avg = $sql_config['stats']['cmi_avg'] ?? "SELECT IFNULL((SUM(adjrw)/count(an)),0) FROM ipt WHERE dchdate BETWEEN :start AND :end";
            $stmt = $pdo->prepare($sql_cmi_avg);
            $stmt->execute(['start' => $start_date, 'end' => $end_date]);
            $response['cmi_avg'] = (float)$stmt->fetchColumn();

            $sql_adjrw_sum = $sql_config['stats']['adjrw_sum'] ?? "SELECT IFNULL(SUM(adjrw),0) FROM ipt WHERE dchdate BETWEEN :start AND :end";
            $stmt = $pdo->prepare($sql_adjrw_sum);
            $stmt->execute(['start' => $start_date, 'end' => $end_date]);
            $response['adjrw_sum'] = (float)$stmt->fetchColumn();
            $addLog('ค่า CMI และ Sum AdjRW ภาพรวม', $sql_cmi_avg . " | " . $sql_adjrw_sum);

            // กราฟรายเดือน
            $sql_trend_cmi = $sql_config['stats']['trend_cmi'] ?? "SELECT DATE_FORMAT(dchdate, '%Y-%m') as ym, IFNULL((SUM(adjrw)/count(an)),0) as cmi, IFNULL(SUM(adjrw),0) as adjrw FROM ipt WHERE dchdate BETWEEN :start AND :end GROUP BY ym ORDER BY ym";
            $stmt = $pdo->prepare($sql_trend_cmi);
            $stmt->execute(['start' => $start_date, 'end' => $end_date]);
            while ($r = $stmt->fetch()) {
                $parts = explode('-', $r['ym']);
                if (count($parts) == 2) {
                    $lb = $thai_months[$parts[1]] . ' ' . substr((int)$parts[0] + 543, 2, 2);
                    $response['trend_cmi']['labels'][] = $lb;
                    $response['trend_cmi']['data'][] = (float)$r['cmi'];
                    $response['trend_adjrw']['labels'][] = $lb;
                    $response['trend_adjrw']['data'][] = (float)$r['adjrw'];
                }
            }
            $addLog('กราฟ CMI / AdjRW รายเดือน', "SELECT DATE_FORMAT(dchdate), SUM(adjrw)...");
        } catch (\Exception $e) {
            $addLog('CMI / AdjRW', '-', $e->getMessage());
        }
    }

    echo "---AJAX_STATS_START---";
    $json_output = @json_encode($response, JSON_UNESCAPED_UNICODE | JSON_INVALID_UTF8_SUBSTITUTE);
    if (!$json_output) {
        echo json_encode(['error' => 'JSON Encode Error']);
    } else {
        echo $json_output;
    }
    echo "---AJAX_STATS_END---";
    exit;
}

// -------------------------------------------------------------------------
// ฟอร์มการกรอง
// -------------------------------------------------------------------------
$c_m = (int)date('m');
$c_y = (int)date('Y');
$c_fy = ($c_m >= 10) ? $c_y + 1 : $c_y;
$options_html = '';
for ($i = 0; $i <= 5; $i++) {
    $y = $c_fy - $i;
    $yth = $y + 543;
    $options_html .= "<option value=\"$y\">ปีงบประมาณ $yth</option>";
}
$start_d = date('Y-m-01');
$end_d = date('Y-m-d');

$stats_filter_html = '
<form class="stats-filter-form card-premium p-4 flex flex-col md:flex-row gap-4 items-start md:items-end bg-gradient-to-r from-slate-50 to-white border-l-4 border-l-indigo-500 shadow-sm w-full mb-6">
    <div class="w-full md:w-1/5">
        <label class="block text-xs font-bold text-slate-600 mb-1.5"><i class="fa-solid fa-filter mr-1 text-indigo-500"></i> รูปแบบข้อมูล</label>
        <select name="filter_type" class="w-full bg-white border border-slate-300 text-slate-700 rounded-lg p-2.5 text-sm outline-none shadow-sm cursor-pointer hover:border-indigo-400 transition-colors" onchange="toggleStatsFilterType(this)">
            <option value="fiscal" selected>ปีงบประมาณ</option>
            <option value="date">ช่วงวันที่กำหนดเอง</option>
        </select>
    </div>
    <div class="w-full md:w-1/4 stats_fiscal_wrapper">
        <label class="block text-xs font-bold text-slate-600 mb-1.5"><i class="fa-solid fa-calendar-days mr-1 text-indigo-500"></i> ปีงบประมาณ</label>
        <select name="fiscal_year" class="w-full bg-white border border-slate-300 text-slate-700 rounded-lg p-2.5 text-sm outline-none shadow-sm cursor-pointer hover:border-indigo-400 transition-colors">' . $options_html . '</select>
    </div>
    <div class="w-full md:w-1/2 flex gap-3 stats_date_wrapper" style="display:none;">
        <div class="flex-1"><label class="block text-xs font-bold text-slate-600 mb-1.5">ตั้งแต่วันที่</label><input type="date" name="start_date" class="w-full bg-white border border-slate-300 text-slate-700 rounded-lg p-2.5 text-sm outline-none shadow-sm cursor-pointer" value="' . $start_d . '"></div>
        <div class="flex-1"><label class="block text-xs font-bold text-slate-600 mb-1.5">ถึงวันที่</label><input type="date" name="end_date" class="w-full bg-white border border-slate-300 text-slate-700 rounded-lg p-2.5 text-sm outline-none shadow-sm cursor-pointer" value="' . $end_d . '"></div>
    </div>
    <button type="submit" class="w-full md:w-[15%] bg-indigo-600 hover:bg-indigo-700 active:scale-[0.98] text-white font-bold py-2.5 px-4 rounded-lg transition-all shadow-md shadow-indigo-500/20 h-[42px] flex items-center justify-center">
        <i class="fa-solid fa-magnifying-glass mr-2"></i> ค้นหา
    </button>
</form>
';
?>
<script>
    function toggleStatsFilterType(selectElement) {
        const form = selectElement.closest('form');
        const type = selectElement.value;
        if (type === 'fiscal') {
            form.querySelector('.stats_fiscal_wrapper').style.display = 'block';
            form.querySelector('.stats_date_wrapper').style.display = 'none';
        } else {
            form.querySelector('.stats_fiscal_wrapper').style.display = 'none';
            form.querySelector('.stats_date_wrapper').style.display = 'flex';
        }
    }
</script>

<?php if ($show_sql_log_btn === 'Y'): ?>
    <button onclick="toggleStatsSqlLogModal()" class="fixed bottom-6 left-[30%] bg-slate-800 text-white px-4 py-3 rounded-full shadow-[0_10px_25px_-5px_rgba(0,0,0,0.5)] z-50 hover:bg-slate-700 hover:scale-105 transition-all flex items-center gap-2 font-bold text-sm border border-slate-600"><i class="fa-solid fa-bug text-emerald-400"></i> ดู SQL Log (สถิติ)</button>
    <div id="stats-sql-log-modal" class="fixed inset-0 bg-slate-900/80 backdrop-blur-sm z-[110] hidden flex-col items-center justify-center p-4">
        <div class="bg-slate-900 border border-slate-700 rounded-xl shadow-2xl w-full max-w-5xl h-[85vh] flex flex-col overflow-hidden animate-fade-in relative">
            <div class="p-4 border-b border-slate-700 flex justify-between items-center bg-slate-800 shrink-0">
                <h3 class="font-bold text-white"><i class="fa-solid fa-terminal text-indigo-400 mr-2"></i> บันทึกการคิวรีฐานข้อมูล ข้อมูลสถิติ (SQL Logs)</h3>
                <button onclick="toggleStatsSqlLogModal()" class="text-slate-400 hover:text-red-400 bg-slate-700 hover:bg-slate-600 w-8 h-8 rounded-lg flex items-center justify-center transition-colors"><i class="fa-solid fa-xmark text-lg"></i></button>
            </div>
            <div class="p-5 overflow-y-auto flex-1 font-mono text-[11px] md:text-xs text-slate-300 leading-relaxed custom-scrollbar block" id="stats-sql-log-content">
                <div class="text-slate-500 text-center py-10"><i class="fa-solid fa-hourglass-half fa-spin mr-2"></i>รอผลการค้นหาข้อมูล...</div>
            </div>
        </div>
    </div>
    <script>
        function toggleStatsSqlLogModal() {
            const modal = document.getElementById('stats-sql-log-modal');
            if (modal.classList.contains('hidden')) {
                modal.classList.remove('hidden');
                modal.classList.add('flex');
            } else {
                modal.classList.remove('flex');
                modal.classList.add('hidden');
            }
        }
    </script>
<?php endif; ?>

<!-- INCLUDE FILES -->
<?php include __DIR__ . '/tab_stats_1_disease.php'; ?>
<?php include __DIR__ . '/tab_stats_2_service.php'; ?>

<!-- JAVASCRIPT -->
<script>
    const safeSetTextStats = (id, text) => {
        const el = document.getElementById(id);
        if (el) el.innerText = text;
    };

    async function fetchStatsRealData(formElement = null) {
        let params;
        if (formElement) {
            params = new URLSearchParams(new FormData(formElement));
        } else {
            const activeForm = document.querySelector('.tab-content:not(.hidden) .stats-filter-form');
            if (activeForm) params = new URLSearchParams(new FormData(activeForm));
            else params = new URLSearchParams();
        }
        params.append('ajax_stats', '1');

        var overlay = document.getElementById('data-processing-overlay');
        if (overlay) {
            overlay.classList.remove('hidden');
            overlay.classList.add('flex');
        }

        try {
            const response = await fetch('?' + params.toString(), {
                method: 'GET',
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            });
            const text = await response.text();
            let data = {};
            if (text.includes('---AJAX_STATS_START---')) {
                data = JSON.parse(text.split('---AJAX_STATS_START---')[1].split('---AJAX_STATS_END---')[0]);
            } else {
                throw new Error("รูปแบบข้อมูลผิดพลาด หรือถูกระบบอื่นดักจับการทำงาน");
            }

            if (!data) throw new Error("Invalid Data Format");

            // --- SQL Logs ---
            if (data.sql_logs) {
                let hasError = false;
                let errorDetails = [];
                const logContent = document.getElementById('stats-sql-log-content');
                if (logContent) {
                    if (data.sql_logs.length > 0) {
                        logContent.innerHTML = data.sql_logs.map((log, i) => {
                            if (log.status === 'Error') {
                                hasError = true;
                                errorDetails.push(log.name);
                                return `<div class="mb-3 p-3 border-l-4 border-red-500 bg-red-900/20 text-red-300 rounded-r"><div class="font-bold text-red-400 mb-1">[${i+1}] ❌ ${log.name}</div><div class="mb-2 text-red-200">Error: ${log.error}</div><div class="text-slate-500 text-[10px] break-all">${log.sql}</div></div>`;
                            } else {
                                return `<div class="mb-3 p-3 border-l-4 border-emerald-500 bg-emerald-900/20 text-emerald-300 rounded-r"><div class="font-bold text-emerald-400 mb-1">[${i+1}] ✅ ${log.name}</div><div class="text-slate-500 text-[10px] break-all">${log.sql}</div></div>`;
                            }
                        }).join('');
                    } else {
                        logContent.innerHTML = '<div class="text-slate-500 text-center py-4">ไม่มี Log บันทึก</div>';
                    }
                }
                if (data.debug_enabled && hasError) alert("⚠️ พบข้อผิดพลาดในคำสั่ง SQL (สถิติ):\n- " + errorDetails.join("\n- "));
            }

            // Helper for Lists
            const updateList = (id, arr) => {
                const el = document.getElementById(id);
                if (el) {
                    if (!arr || arr.length === 0) el.innerHTML = '<li class="text-center text-slate-500 py-4 font-medium"><i class="fa-solid fa-box-open mr-2 text-slate-300"></i>ไม่พบข้อมูล</li>';
                    else el.innerHTML = arr.map((d, i) => `<li class="flex justify-between border-b border-slate-100 pb-1.5 mb-1.5 hover:bg-slate-50 transition-colors px-1"><span class="truncate pr-2 font-medium text-slate-700">${i+1}. ${d.name}</span><span class="font-extrabold text-blue-600">${d.val.toLocaleString()}</span></li>`).join('');
                }
            };

            // --- 1. สถิติโรค ---
            updateList('list-disease-opd-top', data.disease_opd);
            updateList('list-disease-ipd-top', data.disease_ipd);
            updateList('list-disease-ipd-death', data.disease_ipd_death);
            updateList('list-disease-er-death', data.disease_er_death);

            // --- 2. Refer ---
            updateList('list-disease-refer-overview', data.refer_overview);
            updateList('list-disease-refer-ambulance', data.refer_ambulance);
            updateList('list-disease-refer-ship', data.refer_ship);
            updateList('list-disease-refer-air', data.refer_air);

            // --- 3. ยอดบริการรวม ---
            safeSetTextStats('stats-opd-total', data.service_totals.opd.toLocaleString());
            safeSetTextStats('stats-ipd-total', data.service_totals.ipd.toLocaleString());
            safeSetTextStats('stats-er-total', data.service_totals.er.toLocaleString());
            safeSetTextStats('stats-ipd-death', data.service_totals.ipd_death.toLocaleString());
            safeSetTextStats('stats-er-death', data.service_totals.er_death.toLocaleString());
            safeSetTextStats('stats-doa', data.service_totals.doa.toLocaleString());

            let ipdTotal = data.service_totals.ipd || 1;
            safeSetTextStats('stats-ipd-death-pct', ((data.service_totals.ipd_death / ipdTotal) * 100).toFixed(2));

            // --- 4. Service Type & Rights Charts ---
            const updatePieChart = (id, labels, values, colors) => {
                const el = document.getElementById(id);
                if (el) {
                    const ctx = el.getContext('2d');
                    if (window.appCharts[id]) window.appCharts[id].destroy();
                    if (values.reduce((a, b) => a + b, 0) > 0) {
                        window.appCharts[id] = new Chart(ctx, {
                            type: 'doughnut',
                            data: {
                                labels: labels,
                                datasets: [{
                                    data: values,
                                    backgroundColor: colors,
                                    borderWidth: 2,
                                    borderColor: '#ffffff'
                                }]
                            },
                            options: {
                                responsive: true,
                                maintainAspectRatio: false,
                                cutout: '55%',
                                plugins: {
                                    legend: {
                                        display: false
                                    },
                                    datalabels: {
                                        color: '#ffffff',
                                        font: {
                                            weight: 'bold',
                                            size: 12
                                        },
                                        formatter: (v, ctx) => {
                                            let s = 0;
                                            ctx.chart.data.datasets[0].data.map(d => s += d);
                                            return (v * 100 / s).toFixed(1) + '%';
                                        }
                                    }
                                }
                            }
                        });
                    } else {
                        window.appCharts[id] = new Chart(ctx, {
                            type: 'doughnut',
                            data: {
                                labels: ['ไม่มีข้อมูล'],
                                datasets: [{
                                    data: [1],
                                    backgroundColor: ['#e2e8f0']
                                }]
                            },
                            options: {
                                plugins: {
                                    datalabels: {
                                        display: false
                                    }
                                }
                            }
                        });
                    }
                }
            }
            updatePieChart('serviceTypeChart', ['OPD', 'IPD', 'ER'], [data.service_totals.opd, data.service_totals.ipd, data.service_totals.er], ['#3b82f6', '#14b8a6', '#f43f5e']);
            updatePieChart('serviceRightChart', data.service_rights.labels, data.service_rights.data, ['#ec4899', '#a855f7', '#f59e0b', '#94a3b8', '#10b981', '#6366f1']);

            // --- 5. สัญชาติ ---
            const nat = data.nationality;
            safeSetTextStats('stats-nat-thai-total', (nat.thai.opd + nat.thai.ipd).toLocaleString());
            safeSetTextStats('stats-nat-thai-opd', nat.thai.opd.toLocaleString());
            safeSetTextStats('stats-nat-thai-ipd', nat.thai.ipd.toLocaleString());

            safeSetTextStats('stats-nat-foreign-total', (nat.foreign.opd + nat.foreign.ipd).toLocaleString());
            safeSetTextStats('stats-nat-foreign-opd', nat.foreign.opd.toLocaleString());
            safeSetTextStats('stats-nat-foreign-ipd', nat.foreign.ipd.toLocaleString());

            safeSetTextStats('stats-nat-alien-total', (nat.alien.opd + nat.alien.ipd).toLocaleString());
            safeSetTextStats('stats-nat-alien-opd', nat.alien.opd.toLocaleString());
            safeSetTextStats('stats-nat-alien-ipd', nat.alien.ipd.toLocaleString());

            // --- 6. CMI & AdjRW ---
            safeSetTextStats('stats-cmi-avg', data.cmi_avg.toFixed(2));
            safeSetTextStats('stats-adjrw-sum', data.adjrw_sum.toLocaleString());

            const updateLineChart = (id, labelText, dataObj, color, isFloat) => {
                const el = document.getElementById(id);
                if (el && dataObj.labels.length > 0) {
                    const ctx = el.getContext('2d');
                    if (window.appCharts[id]) window.appCharts[id].destroy();
                    let grad = ctx.createLinearGradient(0, 0, 0, 300);
                    grad.addColorStop(0, color.replace('1)', '0.4)'));
                    grad.addColorStop(1, color.replace('1)', '0)'));
                    window.appCharts[id] = new Chart(ctx, {
                        type: 'line',
                        data: {
                            labels: dataObj.labels,
                            datasets: [{
                                label: labelText,
                                data: dataObj.data,
                                borderColor: color.replace('0.4)', '1)'),
                                backgroundColor: grad,
                                borderWidth: 3,
                                pointBackgroundColor: '#ffffff',
                                pointBorderColor: color.replace('0.4)', '1)'),
                                pointBorderWidth: 2,
                                pointRadius: 4,
                                fill: true,
                                tension: 0.4,
                                datalabels: {
                                    align: 'top',
                                    anchor: 'end',
                                    offset: 6,
                                    color: color.replace('0.4)', '1)'),
                                    font: {
                                        weight: 'bold'
                                    },
                                    formatter: v => isFloat ? Number(v).toFixed(2) : Number(v).toLocaleString()
                                }
                            }]
                        },
                        options: {
                            responsive: true,
                            maintainAspectRatio: false,
                            plugins: {
                                legend: {
                                    display: false
                                }
                            },
                            scales: {
                                x: {
                                    grid: {
                                        display: false
                                    }
                                },
                                y: {
                                    display: false,
                                    min: Math.min(...dataObj.data) * 0.8,
                                    suggestedMax: Math.max(...dataObj.data) * 1.2
                                }
                            },
                            layout: {
                                padding: {
                                    top: 25
                                }
                            }
                        }
                    });
                }
            };
            updateLineChart('cmiChartTab', 'ค่า CMI', data.trend_cmi, 'rgba(14, 165, 233, 1)', true);
            updateLineChart('adjrwChartTab', 'Sum AdjRW', data.trend_adjrw, 'rgba(59, 130, 246, 1)', false);

        } catch (err) {
            console.error("Fetch Data Error:", err);
            alert("ไม่สามารถดึงข้อมูลได้ กรุณาตรวจสอบการเชื่อมต่อฐานข้อมูล หรือคำสั่ง SQL\nรายละเอียด: " + err.message);
        } finally {
            if (overlay) {
                setTimeout(() => {
                    overlay.classList.remove('flex');
                    overlay.classList.add('hidden');
                }, 500);
            }
        }
    }

    document.addEventListener('DOMContentLoaded', () => {
        if (!window.appCharts) window.appCharts = {};
        document.querySelectorAll('.stats-filter-form').forEach(form => {
            form.addEventListener('submit', (e) => {
                e.preventDefault();
                fetchStatsRealData(e.target);
            });
        });
    });
</script>