<?php
require_once(__DIR__."/../config/db.php");

function _init_settings_db($conn) {
    $create_sql = "CREATE TABLE IF NOT EXISTS sys_settings (
        setting_key VARCHAR(100) PRIMARY KEY,
        setting_value TEXT
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;";
    try {
        $conn->query($create_sql);
        
        $create_changelog = "CREATE TABLE IF NOT EXISTS sys_changelog (
            id INT AUTO_INCREMENT PRIMARY KEY,
            release_date DATE NOT NULL,
            version VARCHAR(50) NOT NULL,
            description TEXT NOT NULL,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;";
        $conn->query($create_changelog);
    } catch (Exception $e) {
        // Ignore table creation errors if it already exists
    }
}

function get_changelogs() {
    global $conn2;
    if (!isset($conn2)) {
        
    }
    _init_settings_db($conn2);
    
    $logs = [];
    try {
        $result = $conn2->query("SELECT * FROM sys_changelog ORDER BY release_date DESC, id DESC");
        if ($result) {
            while ($row = $result->fetch_assoc()) {
                $logs[] = $row;
            }
        }
    } catch (Exception $e) {}
    return $logs;
}

function add_changelog($release_date, $version, $description) {
    global $conn2;
    if (!isset($conn2)) {
        
    }
    _init_settings_db($conn2);
    
    try {
        $stmt = $conn2->prepare("INSERT INTO sys_changelog (release_date, version, description) VALUES (?, ?, ?)");
        if ($stmt) {
            $stmt->bind_param("sss", $release_date, $version, $description);
            $stmt->execute();
            $stmt->close();
            return true;
        }
    } catch (Exception $e) {}
    return false;
}

function delete_changelog($id) {
    global $conn2;
    if (!isset($conn2)) {
        
    }
    try {
        $stmt = $conn2->prepare("DELETE FROM sys_changelog WHERE id = ?");
        if ($stmt) {
            $stmt->bind_param("i", $id);
            $stmt->execute();
            $stmt->close();
            return true;
        }
    } catch (Exception $e) {}
    return false;
}

function get_app_settings() {
    global $conn2;
    if (!isset($conn2)) {
        
    }
    
    _init_settings_db($conn2);
    
    $defaults = [
        "login_header_main" => "ยินดีต้อนรับ",
        "login_header_sub" => "HOSxP Web Service",
        "sidebar_header_main" => "HOSxP Web",
        "sidebar_header_sub" => "SMART MEDICAL SERVICE",
        "footer_text" => "&copy; {YEAR} โรงพยาบาลเกาะสมุย",
        "line_notify_enable" => "0",
        "line_notify_token" => "",
        "telegram_notify_enable" => "0",
        "telegram_bot_token" => "",
        "telegram_chat_id" => "",
        "strict_search_enable" => "1",
        "auto_logout_enable" => "1",
        "auto_logout_minutes" => "30",
        "vaccine_sql" => "SELECT 
    vax.source_type,
    vax.hn,
    vax.vaccine_date,
    vax.vaccine_time,
    vax.vaccine_code,
    vax.vaccine_name,
    vax.vaccine_group,
    vax.vaccine_lot_no,
    vax.vaccine_place_name
FROM (
    -- 1. ประวัติจากงานผู้ป่วยนอก (OPD / ovst_vaccine)
    SELECT 
        'OPD Service' AS source_type,
        o.hn,
        o.vstdate AS vaccine_date,
        o.vsttime AS vaccine_time,
        pv.vaccine_code,
        pv.vaccine_name,
        pv.vaccine_group,
        ov.vaccine_lot_no,
        'โรงพยาบาล (OPD)' AS vaccine_place_name
    FROM ovst_vaccine ov
    INNER JOIN ovst o ON ov.vn = o.vn
    INNER JOIN person_vaccine pv ON ov.person_vaccine_id = pv.person_vaccine_id
    WHERE o.hn = 'ระบุ_HN'

    UNION ALL

    -- 2. ประวัติจากงานส่งเสริมสุขภาพนักเรียน (village_student_vaccine + list)
    SELECT 
        'School Health (Student)' AS source_type,
        p.patient_hn AS hn,
        vsv.vaccine_date,
        vsv.vaccine_time,
        sv.vaccine_code,
        sv.student_vaccine_name AS vaccine_name,
        'School/Student' AS vaccine_group,
        vsvl.vaccine_lotno AS vaccine_lot_no,
        svp.student_vaccine_place_name AS vaccine_place_name
    FROM village_student_vaccine vsv
    INNER JOIN village_student vs ON vsv.village_student_id = vs.village_student_id
    INNER JOIN person p ON vs.person_id = p.person_id
    INNER JOIN village_student_vaccine_list vsvl ON vsv.village_student_vaccine_id = vsvl.village_student_vaccine_id
    INNER JOIN student_vaccine sv ON vsvl.student_vaccine_id = sv.student_vaccine_id
    LEFT JOIN student_vaccine_place svp ON vsv.student_vaccine_place_id = svp.student_vaccine_place_id
    WHERE p.patient_hn = 'ระบุ_HN'
) vax
ORDER BY vax.vaccine_date DESC, vax.vaccine_time DESC;",
        "ncd_sql" => "SELECT pp.person_id, v.hn ,p.cid, p.mobile_phone_number, 
            concat(p.pname,p.fname,' ',p.lname) as pt_name, pp.house_regist_type_id, p.birthday,
            s.name as sex_name, p.moopart, t3.name as tmb_name, cl.regdate, cl.clinicmember_id, 
            TIMESTAMPDIFF(YEAR, birthday, CURDATE()) AS age_y , pe.name as pttype_name, 
            h.name as hosp_name, p.addrpart, ci.icd10 
            FROM opdscreen os  
            LEFT OUTER JOIN vn_stat v on v.vn=os.vn   
            LEFT OUTER JOIN ovst o on v.vn=o.vn 
            LEFT OUTER JOIN patient p on p.hn=os.hn   
            LEFT OUTER JOIN person pp on p.hn=pp.patient_hn 
            LEFT OUTER JOIN sex s on p.sex=s.code 
            LEFT OUTER JOIN thaiaddress t1 on t1.chwpart=p.chwpart and t1.amppart='00' and t1.tmbpart='00'  
            LEFT OUTER JOIN thaiaddress t2 on t2.chwpart=p.chwpart and t2.amppart=p.amppart and t2.tmbpart='00'     
            LEFT OUTER JOIN thaiaddress t3 on t3.chwpart=p.chwpart and t3.amppart=p.amppart and t3.tmbpart=p.tmbpart 
            LEFT OUTER JOIN clinicmember cl on p.hn=cl.hn 
            LEFT OUTER JOIN pttype pe on v.pttype=pe.pttype 
            LEFT OUTER JOIN hospcode h on o.hospmain=h.hospcode 
            LEFT OUTER JOIN clinic_persist_icd ci on cl.hn=ci.hn 
            WHERE cl.hn in(select hn from ovst where vstdate between ? and ? )   
            AND cl.clinic_member_status_id='1' {clinic_cond} 
            GROUP BY v.hn ORDER BY v.hn ASC",
        "ncd_clinic_dm_code" => "001",
        "ncd_clinic_ht_code" => "002",
        "ncd_clinic_dlp_code" => "039",
        "ncd_clinic_ckd_code" => "051"
    ];
    
    $db_settings = [];
    try {
        $result = $conn2->query("SELECT setting_key, setting_value FROM sys_settings");
        if ($result) {
            while ($row = $result->fetch_assoc()) {
                $db_settings[$row['setting_key']] = $row['setting_value'];
            }
        }
    } catch (Exception $e) {
        // Ignore fetch errors
    }
    
    return array_merge($defaults, $db_settings);
}

function save_app_settings($settings) {
    global $conn2;
    if (!isset($conn2)) {
        
    }
    
    _init_settings_db($conn2);
    
    try {
        $stmt = $conn2->prepare("INSERT INTO sys_settings (setting_key, setting_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE setting_value = VALUES(setting_value)");
        if ($stmt) {
            foreach ($settings as $key => $value) {
                // Ensure value is a string
                $val_str = (string)$value;
                $stmt->bind_param("ss", $key, $val_str);
                $stmt->execute();
            }
            $stmt->close();
            return true;
        }
    } catch (Exception $e) {
        error_log("Failed to save app settings: " . $e->getMessage());
    }
    return false;
}
?>