// 加载企业/用户列表（支持分页和搜索）
async function loadEntities(page = 1, search = '') {
    const splitType = document.getElementById('split-type').value;
    const select = document.getElementById('split-value');
    
    // 显示/隐藏合并特来电选项（仅按企业拆分时显示）
    const mergeTelecomGroup = document.getElementById('merge-telecom-group');
    if (mergeTelecomGroup) {
        mergeTelecomGroup.style.display = splitType === 'company_id' ? 'block' : 'none';
        if (splitType !== 'company_id') {
            document.getElementById('merge-telecom').checked = false;
            toggleTelecomVehicleNo();
        }
    }
    
    if (!splitType) {
        select.innerHTML = '<option value="">请先选择拆分方式</option>';
        return;
    }

    // 保存当前状态
    currentEntityType = splitType === 'company_id' ? 'company' : 
                       splitType === 'user_id' ? 'user' : 
                       splitType === 'station_id' ? 'station' : '';
    entityPage = page;
    currentSearch = search;

    select.innerHTML = '<option value="">加载中...</option>';

    try {
        const response = await fetch(`/api/entities?type=${currentEntityType}&page=${page}&page_size=${entityPageSize}&search=${encodeURIComponent(search)}`);
        const result = await response.json();
        
        if (result.success) {
            const entities = result.data;
            const total = result.total || 0;
            const totalPages = Math.ceil(total / entityPageSize);
            
            if (entities.length === 0) {
                select.innerHTML = '<option value="">无数据</option>';
            } else {
                select.innerHTML = entities.map(e => {
                    let value = '';
                    let name = '';
                    let typeLabel = '';
                    
                    if (splitType === 'company_id') {
                        value = e.company_id;
                        name = e.company_name;
                    } else if (splitType === 'user_id') {
                        value = e.user_id;
                        name = e.user_name;
                        typeLabel = e.order_type === 3 ? '(企业用户)' : '(普通用户)';
                        if (e.phone) {
                            name = `${e.user_name} (${e.phone})`;
                        }
                    } else if (splitType === 'station_id') {
                        value = e.station_id;
                        name = e.station_name;
                    }
                    
                    return `<option value="${value}" data-name="${name}">${name} ${typeLabel}</option>`;
                }).join('');
            }
            
            // 更新分页UI
            updatePagination(totalPages, total);
        }
    } catch (error) {
        console.error('加载列表失败:', error);
        select.innerHTML = '<option value="">加载失败</option>';
    }
}

// 更新分页UI
function updatePagination(totalPages, total) {
    const paginationDiv = document.getElementById('entity-pagination');
    if (totalPages <= 1) {
        paginationDiv.innerHTML = `<small class="text-muted">共 ${total} 条</small>`;
        return;
    }
    
    let html = `<small class="text-muted">共 ${total} 条</small>`;
    html += `<button type="button" class="btn btn-sm btn-secondary" onclick="loadEntities(${entityPage - 1}, currentSearch)" ${entityPage <= 1 ? 'disabled' : ''}>上一页</button>`;
    html += `<span>${entityPage}/${totalPages}</span>`;
    html += `<button type="button" class="btn btn-sm btn-secondary" onclick="loadEntities(${entityPage + 1}, currentSearch)" ${entityPage >= totalPages ? 'disabled' : ''}>下一页</button>`;
    
    paginationDiv.innerHTML = html;
}

// 搜索实体
function searchEntities() {
    const search = document.getElementById('entity-search').value.trim();
    loadEntities(1, search);
}

// 回车搜索
document.addEventListener('DOMContentLoaded', function() {
    const searchInput = document.getElementById('entity-search');
    if (searchInput) {
        searchInput.addEventListener('keypress', function(e) {
            if (e.key === 'Enter') {
                searchEntities();
            }
        });
    }
});