'use strict';

// 合同目录与 Web 端使用相同的节点关系；数量只统计当前用户可见的合同。
function buildCatalog(folders, contracts) {
    const folderById = new Map();
    const nodes = folders.map(folder => {
        const node = {
            id: String(folder.contract_id),
            parentId: String(folder.contract_pid),
            code: folder.code || '',
            name: folder.name || '',
            order: folder.order || 0,
            kind: 'folder',
            count: 0,
        };
        folderById.set(node.id, node);
        return node;
    });

    const seenContracts = new Set();
    for (const contract of contracts) {
        const contractId = String(contract.contract_id);
        if (seenContracts.has(contractId)) continue;
        const parentId = String(contract.contract_pid);
        // 与 Web 端树结构一致，不展示无法挂接到目录的合同。
        if (!folderById.has(parentId)) continue;
        seenContracts.add(contractId);
        nodes.push({
            id: contractId,
            rowId: String(contract.id),
            parentId,
            code: contract.c_code || '',
            name: contract.name || '',
            order: contract.order || 0,
            kind: 'contract',
            fileCount: contract.fileCount || 0,
        });

        const visited = new Set();
        let currentId = parentId;
        while (folderById.has(currentId) && !visited.has(currentId)) {
            visited.add(currentId);
            const folder = folderById.get(currentId);
            folder.count++;
            currentId = folder.parentId;
        }
    }
    return nodes;
}

module.exports = { buildCatalog };