/**
 * Project Master Analysis JS
 * P-WAR (Project Performance Above Replacement) 분석 엔진
 */

document.addEventListener('DOMContentLoaded', () => {
    console.log("Analysis engine initialized...");
    loadPWarData();
});

async function loadPWarData() {
    try {
        const response = await fetch('/api/analysis/p-war');
        const data = await response.json();
        
        if (data.error) throw new Error(data.error);

        updateSummaryMetrics(data);
        renderPWarLeaderboard(data);
        renderRiskSignals(data);
        
        // 시스템 평균 정보 표시
        if (data.length > 0 && data[0].avg_info) {
            const avg = data[0].avg_info;
            document.getElementById('avg-system-info').textContent = 
                `* 0.0 = 시스템 평균 (파일 ${avg.avg_files.toLocaleString()}개 / 방치 ${avg.avg_stagnant}일 / 리스크 ${avg.avg_risk}건)`;
        }
        
    } catch (e) {
        console.error("분석 데이터 로딩 실패:", e);
    }
}

function updateSummaryMetrics(data) {
    // 1. 평균 P-WAR 산출
    const avgPWar = data.reduce((acc, cur) => acc + cur.p_war, 0) / data.length;
    document.querySelector('.metric-card.sra .value').textContent = avgPWar.toFixed(2);
    
    // 2. 고위험 좀비 프로젝트 비율 (P-WAR < -1.0 기준)
    const zombieCount = data.filter(p => p.p_war < -1.0).length;
    const zombieRate = (zombieCount / data.length) * 100;
    document.querySelector('.metric-card.stability .value').textContent = `${zombieRate.toFixed(1)}%`;
    
    // 3. 총 활성 리소스 규모
    const totalActiveFiles = data.filter(p => p.p_war > 0).reduce((acc, cur) => acc + cur.file_count, 0);
    document.querySelector('.metric-card.piso .value').textContent = (totalActiveFiles / 1000).toFixed(1) + "k";
    
    // 4. 방치 리스크 총합
    const totalRisks = data.reduce((acc, cur) => acc + cur.risk_count, 0);
    document.querySelector('.metric-card.iwar .value').textContent = totalRisks;
}

function renderPWarLeaderboard(data) {
    const container = document.querySelector('.timeline-analysis .card-body');
    
    const sortedData = [...data].sort((a, b) => b.p_war - a.p_war);

    container.innerHTML = `
        <div class="table-scroll-wrapper">
            <table class="data-table p-war-table">
                <thead>
                    <tr>
                        <th style="position: sticky; top: 0; z-index: 10; width: 250px;">프로젝트명</th>
                        <th style="position: sticky; top: 0; z-index: 10; width: 140px;">관리 상태</th>
                        <th style="position: sticky; top: 0; z-index: 10;">파일 수</th>
                        <th style="position: sticky; top: 0; z-index: 10;">방치일</th>
                        <th style="position: sticky; top: 0; z-index: 10;">미결리스크</th>
                        <th style="position: sticky; top: 0; z-index: 10;">P-WAR (기여도)</th>
                    </tr>
                </thead>
                <tbody>
                    ${sortedData.map(p => {
                        let statusBadge = "";
                        if (p.is_auto_delete) {
                            statusBadge = '<span class="badge-system">잠김예정 프로젝트</span>';
                        } else if (p.p_war > 0) {
                            statusBadge = '<span class="badge-active">운영 중</span>';
                        } else if (p.p_war <= -0.3) {
                            statusBadge = '<span class="badge-danger">방치-삭제대상</span>';
                        } else {
                            statusBadge = '<span class="badge-warning">위험군</span>';
                        }

                        return `
                            <tr class="${p.is_auto_delete || p.p_war <= -0.3 ? 'row-danger' : p.p_war < 0 ? 'row-warning' : ''}">
                                <td class="font-bold">${p.project_nm}</td>
                                <td>${statusBadge}</td>
                                <td>${p.file_count.toLocaleString()}개</td>
                                <td>${p.days_stagnant}일</td>
                                <td>${p.risk_count}건</td>
                                <td class="p-war-value ${p.p_war >= 0 ? 'text-plus' : 'text-minus'}">
                                    ${p.p_war > 0 ? '+' : ''}${p.p_war}
                                </td>
                            </tr>
                        `;
                    }).join('')}
                </tbody>
            </table>
        </div>
    `;
}

function renderRiskSignals(data) {
    const container = document.querySelector('.risk-signal-list');
    
    // 1. 시스템 삭제(잠김예정) 프로젝트 우선 추출
    const autoDeleted = data.filter(p => p.is_auto_delete).slice(0, 3);
    // 2. 그 외 P-WAR가 낮은 순(음수)으로 추출
    const highRiskProjects = data.filter(p => p.p_war < -1.0 && !p.is_auto_delete).slice(0, 5 - autoDeleted.length);
    
    const combined = [...autoDeleted, ...highRiskProjects];
    
    container.innerHTML = combined.map(p => `
        <div class="risk-item high">
            <div class="risk-project">${p.project_nm} (${p.master})</div>
            <div class="risk-reason">
                ${p.is_auto_delete ? '[잠김예정] 활동 부재로 인한 시스템 자동 삭제 발생' : `P-WAR ${p.p_war} (대체 수준 이하 정체)`}
            </div>
            <div class="risk-status">위험</div>
        </div>
    `).join('');
}