// app.js

document.addEventListener('DOMContentLoaded', () => {

    // =================================================
    // 0. 로그아웃 로직
    // =================================================
    const logoutBtn = document.getElementById('logout-button');
    if (logoutBtn) {
        logoutBtn.addEventListener('click', () => {
            if (confirm('정말로 로그아웃 하시겠습니까?')) {
                window.location.href = '/';
            }
        });
    }

    // =================================================
    // 1. 탭 전환 로직
    // =================================================
    const tabVideo = document.getElementById('tab-video');
    const tabModels = document.getElementById('tab-models');
    const contentVideo = document.getElementById('content-video');
    const contentModels = document.getElementById('content-models');

    if (tabVideo && tabModels) {
        tabVideo.addEventListener('click', () => {
            tabVideo.classList.add('active');
            tabModels.classList.remove('active');
            contentVideo.classList.add('active');
            contentModels.classList.remove('active');
            updateBboxContainerPosition();
        });

        tabModels.addEventListener('click', () => {
            tabModels.classList.add('active');
            tabVideo.classList.remove('active');
            contentModels.classList.add('active');
            contentVideo.classList.remove('active');
            loadModelList();
            loadPoiList();
        });
    }

    // =================================================
    // [신규] Mission UI 로직
    // =================================================
    const MODEL_DEFINITIONS = {
        'OBJDET': { name: "객체 탐지", classes: ["person", "car", "van", "truck", "bus", "motor"] },
        'FIRE': { name: "화재 감지", classes: ["flame", "smoke"] },
        'CROWD': { name: "군중 위험", classes: ["person", "crowd"] },
        'FACEATTR': { name: "얼굴 인식", classes: ["face"] },
        'ABNORM': { name: "이상 행동", classes: ["fall", "fight"] },
        'LPR': { name: "차량 인식", classes: ["plate"] },
        'VIPTRACK': { name: "관심 인물", classes: ["person"] }
    };

    let currentModelCode = 'OBJDET';
    let activeClassFilters = new Set();

    const navItems = document.querySelectorAll('.nav-item');
    navItems.forEach(item => {
        item.addEventListener('click', () => {
            navItems.forEach(nav => nav.classList.remove('active'));
            item.classList.add('active');

            const modelCode = item.dataset.model;
            if(modelCode) {
                currentModelCode = modelCode;
                changeModel(modelCode);
                updateFilterBar(modelCode);
            }
        });
    });

    function changeModel(modelCode) {
        fetch('/set-model', {
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({model: modelCode})
        }).then(r => console.log(`Model changed to ${modelCode}`))
          .catch(e => console.error(e));
    }

    const filterBar = document.getElementById('filter-bar');

    function updateFilterBar(modelCode) {
        if(!filterBar) return;
        filterBar.innerHTML = '';

        const def = MODEL_DEFINITIONS[modelCode];
        if(!def) return;

        const allLabel = document.createElement('label');
        allLabel.className = 'filter-check';
        const allInput = document.createElement('input');
        allInput.type = 'checkbox';
        allInput.checked = true; // 기본적으로 All은 체크됨
        allLabel.appendChild(allInput);
        allLabel.append(' all');

        const sep = document.createElement('span');
        sep.className = 'v-line';
        sep.innerText = '|';

        filterBar.appendChild(allLabel);
        filterBar.appendChild(sep);

        const classInputs = [];

        def.classes.forEach(cls => {
            const label = document.createElement('label');
            label.className = 'filter-check';
            const input = document.createElement('input');
            input.type = 'checkbox';
            input.checked = true; // All이 체크되어 있으므로 기본적으로 모두 체크
            input.dataset.cls = cls;
            label.appendChild(input);
            label.append(` ${cls}`);
            filterBar.appendChild(label);
            classInputs.push(input);

            // 개별 체크박스 변경 시 로직
            input.addEventListener('change', () => {
                // 하나라도 꺼지면 All 체크 해제, 모두 켜지면 All 체크
                const allChecked = classInputs.every(i => i.checked);
                allInput.checked = allChecked;
                updateActiveFilters(classInputs);
            });
        });

        // All 체크박스 변경 시 로직
        allInput.addEventListener('change', () => {
            const isChecked = allInput.checked;
            classInputs.forEach(inp => inp.checked = isChecked);
            updateActiveFilters(classInputs);
        });

        // 초기 필터 상태 반영
        updateActiveFilters(classInputs);
    }

    function updateActiveFilters(classInputs) {
        activeClassFilters.clear();
        // 체크된 항목들만 Set에 추가
        classInputs.forEach(inp => {
            if(inp.checked) activeClassFilters.add(inp.dataset.cls);
        });
    }

    updateFilterBar('OBJDET');

    // =================================================
    // 2. 비디오 & 웹소켓 & Summary 패널
    // =================================================
    const LABEL_MAP = {
        1: { tagName: "객체 탐지", classes: { 0: "person", 1: "car", 2: "van", 3: "truck", 4: "bus", 5: "motor" } },
        2: { tagName: "화재 인식", classes: { 0: "flame", 1: "smoke" } },
        3: { tagName: "얼굴 인식", classes: { 0: "face" } },
        4: { tagName: "차량번호", classes: { 0: "plate" } }
    };

    function getBoxColor(clsName) {
        const colorMap = {
            'person': '#00FF00', 'car': '#00FFFF', 'van': '#FFA500',
            'bus': '#9370DB', 'truck': '#FF69B4', 'flame': '#FF0000', 'smoke': '#CCC'
        };
        return colorMap[clsName] || '#FFFFFF';
    }

    const uri = "ws://10.10.11.246:8765";
    const canvasEl = document.getElementById("frame");
    const bboxContainerEl = document.getElementById("bbox-container");
    const fpsDisplayEl = document.getElementById("fps-display");
    const resolutionEl = document.getElementById("resolution-display");
    const connMsgEl = document.getElementById("connection-msg");
    const summaryListEl = document.getElementById("summary-list");
    let ctx = null;

    if (canvasEl) ctx = canvasEl.getContext('2d');
    let frameCount = 0;
    let lastFpsCheckTime = performance.now();
    let lastFrameMeta = null;
    let viewConfig = { r: 1, dx: 0, dy: 0 };

    function connect() {
        const ws = new WebSocket(uri);
        ws.binaryType = "arraybuffer";

        ws.onopen = () => { if(connMsgEl) connMsgEl.textContent = "영상 수신 중"; };
        ws.onclose = () => {
            if(connMsgEl) connMsgEl.textContent = "연결 끊김 (재접속 중...)";
            setTimeout(connect, 2000);
        };

        ws.onmessage = (event) => {
            const data = event.data;
            if (typeof data === "string") {
                try {
                    const meta = JSON.parse(data);
                    if (meta.type === "frame") {
                        lastFrameMeta = meta;
                        showDetections(meta);
                    }
                } catch(e){ console.error(e); }
            } else if (data instanceof ArrayBuffer && lastFrameMeta) {
                frameCount++;
                const now = performance.now();
                if (now - lastFpsCheckTime >= 1000) {
                    if(fpsDisplayEl) fpsDisplayEl.textContent = `${Math.round(frameCount * 1000 / (now - lastFpsCheckTime))} FPS`;
                    frameCount = 0;
                    lastFpsCheckTime = now;
                }
                const blob = new Blob([data], {type: "image/jpeg"});
                createImageBitmap(blob).then(bmp => {
                    if (resolutionEl) {
                        resolutionEl.textContent = `${bmp.width}x${bmp.height}`;
                    }

                    canvasEl.width = canvasEl.clientWidth;
                    canvasEl.height = canvasEl.clientHeight;
                    const r = Math.min(canvasEl.width / bmp.width, canvasEl.height / bmp.height);
                    const dw = bmp.width * r;
                    const dh = bmp.height * r;
                    const dx = (canvasEl.width - dw) / 2;
                    const dy = (canvasEl.height - dh) / 2;
                    viewConfig = { r, dx, dy };
                    ctx.clearRect(0, 0, canvasEl.width, canvasEl.height);
                    ctx.drawImage(bmp, dx, dy, dw, dh);
                    bmp.close();
                    updateBboxContainerPosition();
                });
            }
        };
    }

    function showDetections(meta) {
        bboxContainerEl.innerHTML = "";
        const items = meta.items || [];
        const currentCounts = {};

        items.forEach((it) => {
            const tagId = it.tag !== undefined ? it.tag : -1;
            const clsId = it.cls !== undefined ? it.cls : -1;

            let displayClassName = `Cls ${clsId}`;
            if (LABEL_MAP[tagId] && LABEL_MAP[tagId].classes[clsId]) {
                displayClassName = LABEL_MAP[tagId].classes[clsId];
            }

            // [수정] 필터링 로직 강화: Set에 없으면 절대 그리지 않음 (All 체크 로직과 연동)
            if (!activeClassFilters.has(displayClassName)) {
                return;
            }

            if(!currentCounts[displayClassName]) currentCounts[displayClassName] = 0;
            currentCounts[displayClassName]++;

            const x1 = it.x1 || 0; const y1 = it.y1 || 0;
            const x2 = it.x2 || 0; const y2 = it.y2 || 0;
            const boxColor = getBoxColor(displayClassName);

            const { r, dx, dy } = viewConfig;
            const screenX = dx + (x1 * r);
            const screenY = dy + (y1 * r);
            const screenW = (x2 - x1) * r;
            const screenH = (y2 - y1) * r;

            const boxDiv = document.createElement('div');
            boxDiv.className = 'bbox';
            boxDiv.style.left = `${screenX}px`;
            boxDiv.style.top = `${screenY}px`;
            boxDiv.style.width = `${screenW}px`;
            boxDiv.style.height = `${screenH}px`;
            boxDiv.style.borderColor = boxColor;

            const label = document.createElement('div');
            label.style.position = 'absolute';
            label.style.top = '-20px';
            label.style.left = '-2px';
            label.style.backgroundColor = boxColor;
            label.style.color = '#000';
            label.style.fontSize = '11px';
            label.style.fontWeight = 'bold';
            label.style.padding = '1px 4px';
            label.textContent = displayClassName;

            boxDiv.appendChild(label);
            bboxContainerEl.appendChild(boxDiv);
        });

        updateSummaryPanel(currentCounts);
    }

    function updateSummaryPanel(counts) {
        if(!summaryListEl) return;
        summaryListEl.innerHTML = '';
        const keys = Object.keys(counts);
        if (keys.length === 0) {
            summaryListEl.innerHTML = '<div style="color:#777; text-align:center; padding:10px;">No detection</div>';
            return;
        }
        keys.forEach(key => {
            const row = document.createElement('div');
            row.className = 'summary-row';
            row.innerHTML = `<span class="label">${key}</span><span class="count">${counts[key]}</span>`;
            summaryListEl.appendChild(row);
        });
    }

    function updateBboxContainerPosition() {
        if (!canvasEl || !bboxContainerEl) return;
        bboxContainerEl.style.top = canvasEl.offsetTop + 'px';
        bboxContainerEl.style.left = canvasEl.offsetLeft + 'px';
        bboxContainerEl.style.width = canvasEl.offsetWidth + 'px';
        bboxContainerEl.style.height = canvasEl.offsetHeight + 'px';
    }

    if (canvasEl) connect();
    window.addEventListener('resize', updateBboxContainerPosition);

    // =================================================
    // 3. 모델 파일 관리 로직
    // =================================================
    function loadModelList() {
        const tableBody = document.querySelector('.model-table tbody');
        if (!tableBody) return;
        fetch('/list-models').then(r=>r.json()).then(models=>{
             tableBody.querySelectorAll('tr[data-role]').forEach(row => {
                const role = row.dataset.role;
                const d = models[role];
                const f = row.querySelector('.model-filename');
                const v = row.querySelector('.model-version');
                const btn = row.querySelector('.btn-delete');
                if(d){ f.textContent=d.file; v.textContent=d.version; btn.classList.remove('hidden'); }
                else { f.textContent='-'; v.textContent='-'; btn.classList.add('hidden'); }
            });
        });
    }

    const modelTableBody = document.querySelector('.model-table tbody');
    if(modelTableBody) {
        modelTableBody.addEventListener('click', (e) => {
            if(e.target.classList.contains('btn-delete')) {
                const row = e.target.closest('tr');
                const filename = row.querySelector('.model-filename').textContent;
                if(filename && filename !== '-') deleteModelFile(filename);
            }
        });
    }

    function deleteModelFile(filename) {
        if (!confirm(`정말로 이 모델 파일(${filename})을 삭제하시겠습니까?`)) return;
        fetch('/delete-model', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({filename: filename})
        }).then(res => res.json()).then(data => {
            if (data.status === 'success') { alert('삭제되었습니다.'); loadModelList(); }
            else { alert(`삭제 실패: ${data.message}`); }
        });
    }

    const globalUploadBtn = document.getElementById('global-upload-button');
    const globalFileInput = document.getElementById('global-file-input');
    const fileNameDisplay = document.getElementById('file-name-display');
    const refreshButton = document.querySelector('.refresh-button');

    if (globalFileInput) {
        globalFileInput.addEventListener('change', () => {
            fileNameDisplay.textContent = globalFileInput.files.length > 0 ? globalFileInput.files[0].name : '선택된 파일 없음';
        });
    }
    if (globalUploadBtn) {
        globalUploadBtn.addEventListener('click', () => {
            if (!globalFileInput.files.length) return alert('파일을 선택해주세요.');
            const formData = new FormData();
            formData.append('modelFile', globalFileInput.files[0]);
            fetch('/upload-model', { method: 'POST', body: formData })
                .then(res => res.json())
                .then(data => {
                    if (data.status === 'success') { alert('업로드 성공'); globalFileInput.value=''; fileNameDisplay.textContent='선택된 파일 없음'; loadModelList(); }
                    else { alert(`실패: ${data.message}`); }
                });
        });
    }
    if (refreshButton) refreshButton.addEventListener('click', loadModelList);


    // =================================================
    // 4. 관심 인물(POI) 관리 로직
    // =================================================
    const poiTableBody = document.querySelector('#poi-table tbody');
    const poiEmptyMsg = document.getElementById('poi-empty-msg');
    const btnPoiRegister = document.getElementById('btn-poi-register');
    const btnPoiRefresh = document.getElementById('btn-poi-refresh');
    const poiModal = document.getElementById('poi-modal');
    const poiNameInput = document.getElementById('poi-name-input');
    const btnModalConfirm = document.getElementById('btn-modal-confirm');
    const btnModalCancel = document.getElementById('btn-modal-cancel');
    const imageViewerModal = document.getElementById('image-viewer-modal');
    const fullImage = document.getElementById('full-image');
    const closeViewerBtn = document.querySelector('.close-viewer');

    function loadPoiList() {
        if (!poiTableBody) return;
        fetch('/poi/list')
            .then(res => res.json())
            .then(list => {
                poiTableBody.innerHTML = '';
                if (!list || list.length === 0) {
                    poiEmptyMsg.classList.remove('hidden');
                    poiTableBody.parentElement.classList.add('hidden');
                } else {
                    poiEmptyMsg.classList.add('hidden');
                    poiTableBody.parentElement.classList.remove('hidden');
                    list.forEach((item, index) => {
                        const tr = document.createElement('tr');
                        let previewHtml = '-';
                        if (item.images && item.images.length > 0) {
                            const imagesHtml = item.images.map(imgName => {
                                const imgSrc = `/poi-images/${item.name}/${imgName}`;
                                return `<div class="preview-item"><img src="${imgSrc}" class="poi-preview" onclick="openImageViewer('${imgSrc}')"><button class="btn-delete-small" onclick="deletePoiImage('${item.name}', '${imgName}')">삭제</button></div>`;
                            }).join('');
                            previewHtml = `<div class="preview-container">${imagesHtml}</div>`;
                        }
                        const fileInputId = `poi-file-${item.name}`;
                        tr.innerHTML = `<td>${index + 1}</td><td><span style="font-weight:bold; margin-right:10px;">${item.name}</span><button class="btn-delete-small" onclick="deletePoi('${item.name}')">삭제</button></td><td>${previewHtml}</td><td><input type="file" id="${fileInputId}" class="hidden" accept=".jpg,.jpeg,.png" multiple onchange="uploadPoiImage('${item.name}', this)"><label for="${fileInputId}" class="btn-browse" style="background:#fff; color:#333;">찾아보기</label></td>`;
                        poiTableBody.appendChild(tr);
                    });
                }
            })
            .catch(err => console.error('POI Load Error:', err));
    }

    window.openImageViewer = function(src) {
        if (fullImage && imageViewerModal) {
            fullImage.src = src;
            imageViewerModal.classList.remove('hidden');
        }
    };
    if (closeViewerBtn) {
        closeViewerBtn.addEventListener('click', () => { imageViewerModal.classList.add('hidden'); });
    }
    window.addEventListener('click', (e) => {
        if (e.target === imageViewerModal) { imageViewerModal.classList.add('hidden'); }
    });
    window.deletePoi = function(name) {
        if (!confirm(`관심인물 '${name}' 삭제?`)) return;
        fetch('/poi/delete', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name }) }).then(res => res.json()).then(data => { if (data.status === 'success') loadPoiList(); });
    };
    window.deletePoiImage = function(name, imageName) {
        if (!confirm(`이미지 삭제?`)) return;
        fetch('/poi/delete-image', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name, imageName }) }).then(res => res.json()).then(data => { if (data.status === 'success') loadPoiList(); });
    };
    window.uploadPoiImage = function(name, input) {
        if (!input.files || input.files.length === 0) return;
        const formData = new FormData();
        formData.append('poiName', name);
        for (let i = 0; i < input.files.length; i++) { formData.append('poiFile', input.files[i]); }
        fetch('/poi/upload-image', { method: 'POST', body: formData }).then(res => res.json()).then(data => { if (data.status === 'success') { alert('완료'); loadPoiList(); } else { alert('실패'); } });
        input.value = '';
    };
    if (btnPoiRefresh) btnPoiRefresh.addEventListener('click', loadPoiList);
    if (btnPoiRegister) { btnPoiRegister.addEventListener('click', () => { poiNameInput.value = ''; poiModal.classList.remove('hidden'); }); }
    if (btnModalCancel) { btnModalCancel.addEventListener('click', () => { poiModal.classList.add('hidden'); }); }
    if (btnModalConfirm) {
        btnModalConfirm.addEventListener('click', () => {
            const name = poiNameInput.value.trim();
            if (!name) return alert('이름 입력');
            fetch('/poi/register', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name }) }).then(res => res.json()).then(data => { if (data.status === 'success') { poiModal.classList.add('hidden'); loadPoiList(); } else { alert('실패'); } });
        });
    }

    loadModelList();
});