/**
 * MeetingImporter — 将会议纪要文本导入知识图谱
 *
 * 创建 Event:meeting 节点，关联参与者（PARTICIPATED 边）
 */

const { getGraphStore } = require('../../db/GraphStore');

class MeetingImporter {
    constructor() {
        this.store = getGraphStore();
    }

    /**
     * 导入会议纪要
     *
     * @param {object} params
     * @param {string} params.title       - 会议标题
     * @param {string} params.date        - 会议日期 (YYYY-MM-DD)
     * @param {string} params.summary     - 会议摘要（必填）
     * @param {string} [params.rawText]   - 原始会议纪要全文
     * @param {string[]} [params.participants] - 参与者姓名或节点 id 列表
     * @returns {{eventId: string, linkedParticipants: string[], skippedParticipants: string[]}}
     */
    importMeetingNotes(params) {
        const {
            title,
            date,
            summary,
            rawText,
            participants = [],
        } = params;

        if (!summary) {
            throw new Error('importMeetingNotes: summary 为必填字段');
        }

        const g = this.store;

        // 创建 Event:meeting 节点
        const eventNode = g.createNode('Event', {
            type: 'meeting',
            title: title || '未命名会议',
            summary,
            date: date || new Date().toISOString().slice(0, 10),
            rawText: rawText || null,
        });

        const linkedParticipants = [];
        const skippedParticipants = [];

        // 关联参与者
        for (const p of participants) {
            // 先精确查 id，再按名称模糊查
            let person = g.getNode(p);
            if (!person || person._type !== 'Person') {
                const results = g.findByName(p, 'Person');
                person = results[0] || null;
            }

            if (person) {
                g.createEdge(person.id, eventNode.id, 'PARTICIPATED');
                linkedParticipants.push(person.name || person.id);
            } else {
                skippedParticipants.push(p);
            }
        }

        return {
            eventId: eventNode.id,
            linkedParticipants,
            skippedParticipants,
        };
    }
}

module.exports = { MeetingImporter };