<?php
/**
 * EDM 筛选接口  GET/POST /api/marketing/edm.php
 * action:
 *   industries           返回行业下拉数据
 *   regions              返回区域二级联动数据（省/州 -> 市/区，来自 persons.work_location / hometown）
 *   filter               按 行业 + 区域 + 关键词 筛选邮箱列表（persons.email + companies 关联联系人邮箱）
 * 入参（filter）：industry / province / city / keyword / page / limit
 */
require_once __DIR__ . '/../common/Api.php';
$pdo = Api::boot(['module' => 'marketing']);


$action = $_REQUEST['action'] ?? 'filter';
$pdo = DB::getInstance()->getPdo();

// ---------- 行业下拉 ----------
if ($action === 'industries') {
    $rows = $pdo->query(
        "SELECT DISTINCT industry FROM companies WHERE industry IS NOT NULL AND industry <> '' AND is_active = 1 ORDER BY industry"
    )->fetchAll(PDO::FETCH_COLUMN);
    Response::success(['industries' => $rows]);
}

// ---------- 区域二级联动 ----------
if ($action === 'regions') {
    // 从 persons.work_location 与 hometown 提取 省/州 与 市/区
    $rows = $pdo->query(
        "SELECT work_location AS loc FROM persons WHERE work_location IS NOT NULL AND work_location <> '' AND is_active = 1
         UNION SELECT hometown AS loc FROM persons WHERE hometown IS NOT NULL AND hometown <> '' AND is_active = 1"
    )->fetchAll(PDO::FETCH_COLUMN);

    $regions = [];
    foreach ($rows as $loc) {
        $parts = preg_split('/[\s\-—–\/,，]+/u', trim($loc));
        $province = $parts[0] ?? $loc;
        $city     = isset($parts[1]) && $parts[1] !== '' ? $parts[1] : '';
        if ($province === '') continue;
        if (!isset($regions[$province])) {
            $regions[$province] = [];
        }
        if ($city !== '' && !in_array($city, $regions[$province], true)) {
            $regions[$province][] = $city;
        }
    }
    Response::success(['regions' => $regions]);
}

// ---------- 筛选邮箱列表 ----------
if ($action === 'filter') {
    $industry = trim($_REQUEST['industry'] ?? '');
    $province = trim($_REQUEST['province'] ?? '');
    $city     = trim($_REQUEST['city'] ?? '');
    $keyword  = trim($_REQUEST['keyword'] ?? '');

    // 邮箱来源：persons 的 social_accounts(platform=email)，关联工作经历(company) 做行业过滤
    $where  = ["sa.platform = 'email'", "sa.is_active = 1", 'p.is_active = 1'];
    $params = [];

    if ($industry !== '') {
        $where[] = "EXISTS (
            SELECT 1 FROM person_work_experiences pwe
            LEFT JOIN companies c ON c.id = pwe.company_id
            WHERE pwe.person_id = p.id AND pwe.is_active = 1 AND c.industry = ?
        )";
        $params[] = $industry;
    }
    if ($province !== '') {
        $where[] = "(p.work_location LIKE ? OR p.hometown LIKE ?)";
        $params[] = "%$province%";
        $params[] = "%$province%";
    }
    if ($city !== '') {
        $where[] = "(p.work_location LIKE ? OR p.hometown LIKE ?)";
        $params[] = "%$city%";
        $params[] = "%$city%";
    }
    if ($keyword !== '') {
        $where[] = '(p.full_name LIKE ? OR sa.account_id LIKE ?)';
        $like = "%$keyword%";
        array_push($params, $like, $like);
    }
    $whereSql = implode(' AND ', $where);

    $stmt = $pdo->prepare(
        "SELECT COUNT(*) FROM social_accounts sa
         LEFT JOIN persons p ON p.id = sa.owner_id
         WHERE $whereSql"
    );
    $stmt->execute($params);
    $total = (int)$stmt->fetchColumn();

    [$page, $limit] = pageParams(20);
    $offset = ($page - 1) * $limit;
    $stmt = $pdo->prepare(
        "SELECT sa.id, sa.account_id AS email, p.id AS person_id, p.full_name, p.work_location, p.hometown,
                (SELECT c.display_name FROM person_work_experiences pwe
                 LEFT JOIN companies c ON c.id = pwe.company_id
                 WHERE pwe.person_id = p.id AND pwe.is_current = 1 LIMIT 1) AS company_name
         FROM social_accounts sa
         LEFT JOIN persons p ON p.id = sa.owner_id
         WHERE $whereSql
         ORDER BY sa.id DESC
         LIMIT $limit OFFSET $offset"
    );
    $stmt->execute($params);
    $list = $stmt->fetchAll();

    Response::success(['list' => $list, 'total' => $total, 'page' => $page, 'limit' => $limit]);
}

Response::error('未知操作', 400);