<?php
/**
 * 通用辅助函数与字段白名单（供各模块 add/update/import 复用）
 */
require_once __DIR__ . '/db.php';
require_once __DIR__ . '/response.php';

/** 企业表可写入字段白名单（key => 类型标记：s字符串/i整数/d日期/n数字） */
const COMPANY_FIELDS = [
    'name_zh' => 's', 'name_en' => 's', 'display_name' => 's',
    'business_role' => 's', 'country' => 's', 'registration_number' => 's',
    'address' => 's', 'legal_form' => 's', 'legal_representative' => 's',
    'business_scope' => 's', 'established_date' => 'd', 'registered_capital' => 's',
    'industry' => 's', 'industry_subdivision' => 's',
    'latest_employee_count' => 'i', 'latest_annual_revenue' => 's',
    'is_listed' => 'i', 'stock_code' => 's', 'website' => 's',
    'source_channel' => 's', 'source_detail' => 's',
];

/** 人员表可写入字段白名单 */
const PERSON_FIELDS = [
    'union_id' => 's', 'full_name' => 's', 'gender' => 's', 'nationality' => 's',
    'id_type' => 's', 'id_number' => 's', 'education' => 's', 'graduated_from' => 's',
    'hometown' => 's', 'work_location' => 's',
    'source_channel' => 's', 'source_detail' => 's',
];

/** 媒体（社交账号）表可写入字段白名单 */
const MEDIA_FIELDS = [
    'owner_type' => 's', 'owner_id' => 'i', 'platform' => 's', 'account_id' => 's',
    'profile_url' => 's', 'remark' => 's', 'is_primary' => 'i', 'is_defult' => 'i',
];

/** 媒体商业属性表可写入字段白名单 */
const MEDIA_ATTR_FIELDS = [
    'account_level' => 's', 'content_categories' => 's', 'follower_count' => 'i',
    'avg_read_count' => 'i', 'certification_type' => 's',
    'special_requirements' => 's', 'media_remark' => 's',
];

/** 需求表可写入字段白名单 */
const NEED_FIELDS = [
    'company_id' => 'i', 'contact_person' => 's', 'need_category' => 's',
    'target_product_category' => 's', 'application_scenario' => 's', 'description' => 's',
];

/**
 * 从 POST 中按白名单提取并清洗数据
 * @param array $allowlist
 * @return array
 */
function extractFields($allowlist)
{
    $data = [];
    foreach ($allowlist as $key => $type) {
        $val = $_POST[$key] ?? null;
        if ($val === null) {
            continue;
        }
        $val = trim((string)$val);
        if ($val === '') {
            continue;
        }
        switch ($type) {
            case 'i':
                $data[$key] = (int)$val;
                break;
            case 'd':
                $data[$key] = (strtotime($val) !== false) ? date('Y-m-d', strtotime($val)) : null;
                break;
            default:
                $data[$key] = $val;
        }
    }
    return $data;
}

/** 生成 INSERT 语句片段：字段名列表 + 占位符 */
function buildInsert($data)
{
    $cols = array_keys($data);
    $sql  = '(`' . implode('`,`', $cols) . '`) VALUES (' . rtrim(str_repeat('?,', count($cols)), ',') . ')';
    return [$sql, array_values($data)];
}

/** 生成 UPDATE SET 片段 */
function buildUpdate($data)
{
    $sets = [];
    foreach (array_keys($data) as $col) {
        $sets[] = "`$col` = ?";
    }
    return [implode(',', $sets), array_values($data)];
}

/** 数字字符串或 null（空串转 null，避免写入空值） */
function numOrNull($v)
{
    $v = trim((string)$v);
    return ($v === '') ? null : $v;
}

/** 字符串或 null（空串转 null） */
function strOrNull($v)
{
    if ($v === null) {
        return null;
    }
    $v = trim((string)$v);
    return ($v === '') ? null : $v;
}

/**
 * 保存人员工作履历（整表替换：先删后插）
 * @param PDO $pdo
 * @param int $personId
 * @param array $experiences JSON 解码后的数组 [{company_id,position,department,job_level,start_date,end_date,is_current}]
 */
function savePersonExperiences($pdo, $personId, $experiences)
{
    $del = $pdo->prepare("DELETE FROM person_work_experiences WHERE person_id = ?");
    $del->execute([$personId]);
    if (empty($experiences)) {
        return;
    }
    $ins = $pdo->prepare(
        "INSERT INTO person_work_experiences
         (person_id, company_id, position, department, job_level, start_date, end_date, is_current)
         VALUES (?,?,?,?,?,?,?,?)"
    );
    foreach ($experiences as $e) {
        if (!is_array($e)) {
            continue;
        }
        $companyId = (int)($e['company_id'] ?? 0);
        if ($companyId <= 0) {
            continue;
        }
        $start = strOrNull($e['start_date'] ?? null);
        $end   = strOrNull($e['end_date'] ?? null);
        $ins->execute([
            $personId,
            $companyId,
            strOrNull($e['position'] ?? null),
            strOrNull($e['department'] ?? null),
            strOrNull($e['job_level'] ?? null),
            $start !== null && strtotime($start) !== false ? date('Y-m-d', strtotime($start)) : null,
            $end !== null && strtotime($end) !== false ? date('Y-m-d', strtotime($end)) : null,
            !empty($e['is_current']) ? 1 : 0,
        ]);
    }
}

/**
 * 保存企业联系方式（social_accounts，整表替换：先删后插）
 * 只操作 owner_type = 'company' 的记录
 * @param PDO $pdo
 * @param int $companyId
 * @param array $accounts JSON 解码后的数组 [{platform,account_id,profile_url,remark,is_active,is_defult}]
 */
function saveCompanyAccounts($pdo, $companyId, $accounts)
{
    $del = $pdo->prepare("DELETE FROM social_accounts WHERE owner_type = 'company' AND owner_id = ?");
    $del->execute([$companyId]);
    if (empty($accounts)) {
        return;
    }
    $ins = $pdo->prepare(
        "INSERT INTO social_accounts
         (owner_type, owner_id, platform, account_id, profile_url, remark, is_primary, is_defult, is_active)
         VALUES ('company', ?, ?, ?, ?, ?, 0, ?, ?)"
    );
    foreach ($accounts as $a) {
        if (!is_array($a)) {
            continue;
        }
        $platform  = trim($a['platform'] ?? '');
        $accountId = trim($a['account_id'] ?? '');
        if ($platform === '' || $accountId === '') {
            continue;
        }
        $ins->execute([
            $companyId,
            $platform,
            $accountId,
            strOrNull($a['profile_url'] ?? null),
            strOrNull($a['remark'] ?? null),
            !empty($a['is_defult']) ? 1 : 0,
            !empty($a['is_active']) ? 1 : 0,
        ]);
    }
}

/**
 * 保存企业年度财务明细（整表替换：先删后插）
 * @param PDO $pdo
 * @param int $companyId
 * @param array $financials JSON 解码后的数组
 */
function saveCompanyFinancials($pdo, $companyId, $financials)
{
    $del = $pdo->prepare("DELETE FROM company_financials WHERE company_id = ?");
    $del->execute([$companyId]);
    if (empty($financials)) {
        return;
    }

    $ins = $pdo->prepare(
        "INSERT INTO company_financials
         (company_id, fiscal_year, employee_count, total_revenue, net_profit, total_assets,
          total_liabilities, owner_equity, gross_margin, net_margin, debt_ratio, financial_report_url, data_source)
         VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)"
    );
    $seen = [];
    foreach ($financials as $f) {
        if (!is_array($f)) {
            continue;
        }
        $year = (int)($f['fiscal_year'] ?? 0);
        if ($year < 1990 || $year > 2100) {
            continue;
        }
        if (isset($seen[$year])) {
            continue; // 同一财年只保留一条
        }
        $seen[$year] = true;
        $ins->execute([
            $companyId,
            $year,
            numOrNull($f['employee_count'] ?? null),
            numOrNull($f['total_revenue'] ?? null),
            numOrNull($f['net_profit'] ?? null),
            numOrNull($f['total_assets'] ?? null),
            numOrNull($f['total_liabilities'] ?? null),
            numOrNull($f['owner_equity'] ?? null),
            numOrNull($f['gross_margin'] ?? null),
            numOrNull($f['net_margin'] ?? null),
            numOrNull($f['debt_ratio'] ?? null),
            strOrNull($f['financial_report_url'] ?? null),
            strOrNull($f['data_source'] ?? null) ?? '手动录入',
        ]);
    }
}

/**
 * 保存企业资质认证（整表替换：先删后插）
 * @param PDO $pdo
 * @param int $companyId
 * @param array $certifications JSON 解码后的数组
 */
function saveCompanyCertifications($pdo, $companyId, $certifications)
{
    $del = $pdo->prepare("DELETE FROM company_certifications WHERE company_id = ?");
    $del->execute([$companyId]);
    if (empty($certifications)) {
        return;
    }

    $valid = $pdo->prepare("SELECT id FROM data_dict_certificate WHERE id = ?");
    $ins = $pdo->prepare(
        "INSERT INTO company_certifications
         (company_id, certification_type_id, certificate_number, level, issuing_authority, issue_date, expiry_date)
         VALUES (?,?,?,?,?,?,?)"
    );
    $seen = [];
    foreach ($certifications as $ct) {
        if (!is_array($ct)) {
            continue;
        }
        $tid = (int)($ct['certification_type_id'] ?? 0);
        if ($tid <= 0 || isset($seen[$tid])) {
            continue;
        }
        $valid->execute([$tid]);
        if (!$valid->fetch()) {
            continue; // 认证类型不存在
        }
        $seen[$tid] = true;
        $ins->execute([
            $companyId,
            $tid,
            strOrNull($ct['certificate_number'] ?? null),
            strOrNull($ct['level'] ?? null),
            strOrNull($ct['issuing_authority'] ?? null),
            strOrNull($ct['issue_date'] ?? null),
            strOrNull($ct['expiry_date'] ?? null),
        ]);
    }
}