<?php
// pros_users_inup.php

/**
 * 사용자 정보 동기화 및 이력 저장 함수
 * @param PDO $pdo DB연결 객체
 * @param array $userData API로부터 받은 사용자 배열 데이터
 * @return array 처리 결과 카운트
 */
function processUserSync($pdo, $userData) {
    $insCount = 0;
    $updCount = 0;
    $errCount = 0;

    foreach ($userData as $user) {
        $mid = $user['member_id'];
        $scc = $user['sys_comp_code'];

        if (empty($mid) || empty($scc)) continue; // 필수 키 없으면 패스

        try {
            // 1. 존재 여부 확인 (복합키 기준)
            $checkSql = "SELECT COUNT(*) FROM edu_users_temp WHERE member_id = ? AND sys_comp_code = ?";
            $stmt = $pdo->prepare($checkSql);
            $stmt->execute([$mid, $scc]);
            $exists = $stmt->fetchColumn() > 0;

            // 날짜 세팅 (비어있거나 잘못된 날짜 처리)
            $join_date = (!empty($user['join_date']) && $user['join_date'] != "0000-00-00") ? $user['join_date'] : null;
            $end_date = (!empty($user['end_date']) && $user['end_date'] != "0000-00-00") ? $user['end_date'] : null;

            if ($exists) {
                // 2-1. UPDATE (기존 정보 갱신)
                $sql = "UPDATE edu_users_temp SET 
                            name = :name, dept_name = :dept_name, rank_name = :rank_name, 
                            join_date = :join_date, belong_comp = :belong_comp, working_comp = :working_comp, 
                            end_date = :end_date, belong_comp_id = :belong_comp_id, working_comp_id = :working_comp_id,
                            updated_at = NOW()
                        WHERE member_id = :member_id AND sys_comp_code = :sys_comp_code";
                $action = "UPDATE";
            } else {
                // 2-2. INSERT (신규 등록)
                $sql = "INSERT INTO edu_users_temp (
                            member_id, sys_comp_code, name, dept_name, rank_name, 
                            join_date, belong_comp, working_comp, end_date, 
                            belong_comp_id, working_comp_id, created_at, updated_at
                        ) VALUES (
                            :member_id, :sys_comp_code, :name, :dept_name, :rank_name, 
                            :join_date, :belong_comp, :working_comp, :end_date, 
                            :belong_comp_id, :working_comp_id, NOW(), NOW()
                        )";
                $action = "INSERT";
            }

            $stmt = $pdo->prepare($sql);
            $res = $stmt->execute([
                ':member_id'      => $mid,
                ':sys_comp_code'  => $scc,
                ':name'           => $user['name'] ?? '',
                ':dept_name'      => $user['dept_name'] ?? '',
                ':rank_name'      => $user['rank_name'] ?? '',
                ':join_date'      => $join_date,
                ':belong_comp'    => $user['belong_comp'] ?? '',
                ':working_comp'   => $user['working_comp'] ?? '',
                ':end_date'       => $end_date,
                ':belong_comp_id' => $user['belong_comp_id'] ?? '',
                ':working_comp_id'=> $user['working_comp_id'] ?? ''
            ]);

			if ($res) {
				if ($action == "INSERT") {
					$insCount++;
					// [INSERT 전용 이력] 생성일시만 기록
					$hisSql = "INSERT INTO edu_userinfo_history (
									uh_member_id, uh_sys_comp_code, uh_created_at, uh_updated_at, uh_etc_01
								) VALUES (
									:mid, :scc, NOW(), NULL, :etc
								)";
				} else {
					$updCount++;
					// [UPDATE 전용 이력] 수정일시만 기록
					$hisSql = "INSERT INTO edu_userinfo_history (
									uh_member_id, uh_sys_comp_code, uh_created_at, uh_updated_at, uh_etc_01
								) VALUES (
									:mid, :scc, NULL, NOW(), :etc
								)";
				}

				$hisStmt = $pdo->prepare($hisSql);
				$hisStmt->execute([
					':mid' => $mid,
					':scc' => $scc,
					':etc' => $action . " 수행 완료"
				]);
			}

        } catch (PDOException $e) {
            error_log("Sync Error ($mid): " . $e->getMessage());
            $errCount++;
        }
    }

    return ['ins' => $insCount, 'upd' => $updCount, 'err' => $errCount];
}