/* Pipeline Module - Main JavaScript */
(function() {
    'use strict';

    var API_BASE = '';  // Will be set on init
    var currentView = 'list';
    var currentPipelineId = null;

    // === Initialization ===

    function init() {
        // Detect API base from current URL
        var base = window.location.pathname.replace(/\/pipeline\/index\.ui.*$/, '/pipeline');
        API_BASE = base;
        showListView();
    }

    // === API Helpers ===

    function apiGet(path, callback) {
        var xhr = new XMLHttpRequest();
        xhr.open('GET', API_BASE + path, true);
        xhr.onreadystatechange = function() {
            if (xhr.readyState === 4) {
                try {
                    var data = JSON.parse(xhr.responseText);
                    callback(null, data);
                } catch(e) {
                    callback('解析响应失败', null);
                }
            }
        };
        xhr.onerror = function() { callback('网络请求失败', null); };
        xhr.send();
    }

    function apiPost(path, body, callback) {
        var xhr = new XMLHttpRequest();
        xhr.open('POST', API_BASE + path, true);
        xhr.setRequestHeader('Content-Type', 'application/json');
        xhr.onreadystatechange = function() {
            if (xhr.readyState === 4) {
                try {
                    var data = JSON.parse(xhr.responseText);
                    callback(null, data);
                } catch(e) {
                    callback('解析响应失败', null);
                }
            }
        };
        xhr.onerror = function() { callback('网络请求失败', null); };
        xhr.send(JSON.stringify(body));
    }

    // === View Rendering ===

    function getContainer() {
        return document.getElementById('pipeline_content');
    }

    function showListView() {
        currentView = 'list';
        currentPipelineId = null;
        var c = getContainer();
        if (!c) return;
        c.innerHTML = '<div class="pipeline-container">' +
            '<div class="pipeline-header">' +
            '<h2>产线任务</h2>' +
            '<button class="pipeline-btn pipeline-btn-primary" onclick="PipelineUI.showCreateView()">+ 新建任务</button>' +
            '</div>' +
            '<div id="pipeline_list_body"><div class="pipeline-loading">加载中...</div></div>' +
            '</div>';
        loadTaskList();
    }

    function loadTaskList() {
        apiGet('/api/pipeline_list.dspy', function(err, data) {
            var el = document.getElementById('pipeline_list_body');
            if (!el) return;
            if (err) { el.innerHTML = '<div class="pipeline-error">' + err + '</div>'; return; }
            if (data.status === 'error') { el.innerHTML = '<div class="pipeline-error">' + (data.message || '加载失败') + '</div>'; return; }

            var tasks = data.tasks || data.data || [];
            if (!tasks.length) {
                el.innerHTML = '<div class="pipeline-empty">暂无产线任务<br><br><button class="pipeline-btn pipeline-btn-primary" onclick="PipelineUI.showCreateView()">创建第一个任务</button></div>';
                return;
            }
            var html = '<ul class="pipeline-task-list">';
            for (var i = 0; i < tasks.length; i++) {
                var t = tasks[i];
                var st = t.state || 'unknown';
                var stClass = 'status-' + st;
                var stText = {completed:'已完成', running:'运行中', failed:'失败', submitted:'已提交', processing:'处理中'}[st] || st;
                html += '<li class="pipeline-task-item" onclick="PipelineUI.showDetailView(\'' + t.pipeline_id + '\')">' +
                    '<span class="pipeline-task-id">' + esc(t.pipeline_id) + '</span>' +
                    '<span class="pipeline-task-title">' + esc(t.title || t.mode || '-') + '</span>' +
                    '<span class="pipeline-task-meta">' +
                    '<span>' + esc(t.mode || '') + '</span>' +
                    '<span class="pipeline-status ' + stClass + '">' + stText + '</span>' +
                    '<span>v' + (t.current_version || 1) + '</span>' +
                    '</span></li>';
            }
            html += '</ul>';
            el.innerHTML = html;
        });
    }

    function showCreateView() {
        currentView = 'create';
        var c = getContainer();
        if (!c) return;
        c.innerHTML = '<div class="pipeline-container">' +
            '<div class="pipeline-detail-header">' +
            '<button class="pipeline-back-btn" onclick="PipelineUI.showListView()">← 返回</button>' +
            '<span class="pipeline-detail-title">新建产线任务</span></div>' +
            '<div class="pipeline-form" id="pipeline_create_form">' +

            '<div class="pipeline-form-group">' +
            '<label class="pipeline-form-label">产线模式</label>' +
            '<select class="pipeline-form-select" id="pf_mode" onchange="PipelineUI.onModeChange()">' +
            '<option value="audio_lyrics">音频+歌词 (Mode A)</option>' +
            '<option value="video_lyrics">视频+歌词 (Mode B)</option>' +
            '<option value="lyrics_only" selected>仅歌词/大纲 (Mode C)</option>' +
            '</select></div>' +

            '<div class="pipeline-form-group" id="pf_audio_group" style="display:none">' +
            '<label class="pipeline-form-label">音频文件路径</label>' +
            '<input class="pipeline-form-input" id="pf_audio" placeholder="/path/to/audio.mp3" /></div>' +

            '<div class="pipeline-form-group" id="pf_video_group" style="display:none">' +
            '<label class="pipeline-form-label">视频文件路径</label>' +
            '<input class="pipeline-form-input" id="pf_video" placeholder="/path/to/video.mp4" /></div>' +

            '<div class="pipeline-form-group">' +
            '<label class="pipeline-form-label">歌曲名称</label>' +
            '<input class="pipeline-form-input" id="pf_title" placeholder="输入歌曲名称" /></div>' +

            '<div class="pipeline-form-group" id="pf_lyrics_group">' +
            '<label class="pipeline-form-label">歌词</label>' +
            '<textarea class="pipeline-form-textarea" id="pf_lyrics" placeholder="输入歌词文本，或留空由AI生成"></textarea></div>' +

            '<div class="pipeline-form-group">' +
            '<label class="pipeline-form-label">词作者</label>' +
            '<input class="pipeline-form-input" id="pf_lyricist" placeholder="可选" /></div>' +

            '<div class="pipeline-form-group">' +
            '<label class="pipeline-form-label">曲作者</label>' +
            '<input class="pipeline-form-input" id="pf_composer" placeholder="可选" /></div>' +

            '<div style="margin-top:24px">' +
            '<button class="pipeline-btn pipeline-btn-primary" onclick="PipelineUI.submitTask()" id="pf_submit_btn">提交任务</button>' +
            '<button class="pipeline-btn pipeline-btn-secondary" onclick="PipelineUI.showListView()" style="margin-left:8px">取消</button>' +
            '</div></div>' +
            '<div id="pipeline_create_msg"></div></div>';
    }

    function onModeChange() {
        var mode = document.getElementById('pf_mode').value;
        var audioG = document.getElementById('pf_audio_group');
        var videoG = document.getElementById('pf_video_group');
        var lyricsG = document.getElementById('pf_lyrics_group');
        if (audioG) audioG.style.display = (mode === 'audio_lyrics') ? 'block' : 'none';
        if (videoG) videoG.style.display = (mode === 'video_lyrics') ? 'block' : 'none';
        if (lyricsG) lyricsG.style.display = (mode === 'video_lyrics') ? 'none' : 'block';
    }

    function submitTask() {
        var mode = document.getElementById('pf_mode').value;
        var title = document.getElementById('pf_title').value;
        var lyrics = document.getElementById('pf_lyrics') ? document.getElementById('pf_lyrics').value : '';
        var lyricist = document.getElementById('pf_lyricist').value;
        var composer = document.getElementById('pf_composer').value;

        if (!title) { alert('请输入歌曲名称'); return; }

        var body = { mode: mode, title: title, lyrics: lyrics, lyricist: lyricist, composer: composer };

        if (mode === 'audio_lyrics') {
            body.input_audio = document.getElementById('pf_audio').value;
            if (!body.input_audio) { alert('请输入音频文件路径'); return; }
        } else if (mode === 'video_lyrics') {
            body.input_video = document.getElementById('pf_video').value;
            if (!body.input_video) { alert('请输入视频文件路径'); return; }
        }

        var btn = document.getElementById('pf_submit_btn');
        if (btn) { btn.disabled = true; btn.textContent = '提交中...'; }

        apiPost('/api/pipeline_submit.dspy', body, function(err, data) {
            if (btn) { btn.disabled = false; btn.textContent = '提交任务'; }
            if (err) { alert('提交失败: ' + err); return; }
            if (data.status === 'error') { alert('提交失败: ' + (data.message || '未知错误')); return; }

            var pid = data.pipeline_id;
            if (pid) {
                showDetailView(pid);
            } else {
                showListView();
            }
        });
    }

    // === Task Detail View ===

    function showDetailView(pipelineId) {
        currentView = 'detail';
        currentPipelineId = pipelineId;
        var c = getContainer();
        if (!c) return;
        c.innerHTML = '<div class="pipeline-container">' +
            '<div class="pipeline-detail-header">' +
            '<button class="pipeline-back-btn" onclick="PipelineUI.showListView()">← 返回</button>' +
            '<div><div class="pipeline-detail-title" id="pd_title">加载中...</div>' +
            '<div class="pipeline-detail-meta" id="pd_meta"></div></div></div>' +
            '<div id="pd_nodes"><div class="pipeline-loading">加载任务节点...</div></div>' +
            '</div>';
        loadTaskDetail(pipelineId);
    }

    function loadTaskDetail(pid) {
        apiGet('/api/pipeline_detail.dspy?pipeline_id=' + encodeURIComponent(pid), function(err, data) {
            if (err) {
                document.getElementById('pd_nodes').innerHTML = '<div class="pipeline-error">' + err + '</div>';
                return;
            }
            if (data.status === 'error') {
                document.getElementById('pd_nodes').innerHTML = '<div class="pipeline-error">' + (data.message || '加载失败') + '</div>';
                return;
            }

            var titleEl = document.getElementById('pd_title');
            var metaEl = document.getElementById('pd_meta');
            var nodesEl = document.getElementById('pd_nodes');

            if (titleEl) titleEl.textContent = data.title || pid;
            if (metaEl) {
                var st = data.state || '';
                var stText = {completed:'已完成', running:'运行中', failed:'失败', submitted:'已提交'}[st] || st;
                metaEl.innerHTML = 'ID: ' + esc(pid) + ' | ' +
                    esc(data.mode || '') + ' | ' +
                    '<span class="pipeline-status status-' + st + '">' + stText + '</span>' +
                    ' | 版本 v' + (data.current_version || 1);
            }

            renderNodeTree(nodesEl, data);
        });
    }

    function renderNodeTree(container, data) {
        if (!container) return;
        var steps = data.steps || {};
        var artifacts = data.artifacts || {};
        var versions = data.versions || {};

        // Sort steps by order
        var stepList = [];
        for (var name in steps) {
            if (steps.hasOwnProperty(name)) {
                var s = steps[name];
                stepList.push({name: name, order: s.order || 0, version: s.version || 1, deps: s.deps || [], state: s.state || ''});
            }
        }
        stepList.sort(function(a, b) { return a.order - b.order; });

        if (!stepList.length) {
            container.innerHTML = '<div class="pipeline-empty">无步骤数据</div>';
            return;
        }

        var html = '<div class="pipeline-node-tree">';
        for (var i = 0; i < stepList.length; i++) {
            var step = stepList[i];
            var st = step.state || 'pending';
            var stText = {completed:'✓', running:'⟳', pending:'○', failed:'✗'}[st] || '?';
            var iconClass = 'node-icon-' + st;
            var nameCN = STEP_NAMES[step.name] || step.name;

            // Find artifact for this step
            var artKey = '';
            for (var ak in artifacts) {
                if (artifacts.hasOwnProperty(ak) && artifacts[ak].step === step.name) {
                    artKey = ak;
                    break;
                }
            }

            html += '<div class="pipeline-node-card" id="node_' + step.name + '">' +
                '<div class="pipeline-node-header" onclick="PipelineUI.toggleNode(\'' + step.name + '\')">' +
                '<div class="pipeline-node-icon ' + iconClass + '">' + stText + '</div>' +
                '<span class="pipeline-node-name">' + esc(nameCN) + '</span>' +
                '<span class="pipeline-node-version">v' + step.version + '</span>' +
                '</div>' +
                '<div class="pipeline-node-body" id="node_body_' + step.name + '">';

            if (st === 'completed') {
                html += '<div class="pipeline-io-section">' +
                    '<div class="pipeline-io-label">输入 / 输出</div>' +
                    '<div id="node_io_' + step.name + '" class="pipeline-io-content">点击加载...</div>' +
                    '<div class="pipeline-io-actions">' +
                    '<button class="pipeline-btn pipeline-btn-secondary pipeline-btn-sm" onclick="PipelineUI.loadNodeIO(\'' + step.name + '\')">刷新</button>' +
                    '<button class="pipeline-btn pipeline-btn-primary pipeline-btn-sm" onclick="PipelineUI.showNodeEdit(\'' + step.name + '\', \'input\')">修改输入</button>' +
                    '<button class="pipeline-btn pipeline-btn-primary pipeline-btn-sm" onclick="PipelineUI.showNodeEdit(\'' + step.name + '\', \'output\')">修改输出</button>' +
                    '</div></div>';
            } else if (st === 'running') {
                html += '<div class="pipeline-loading">该节点正在运行中...</div>';
            } else if (st === 'failed') {
                html += '<div class="pipeline-error">该节点执行失败</div>';
            } else {
                html += '<div style="color:#aaa;font-size:13px">等待执行</div>';
            }

            html += '</div></div>';
        }
        html += '</div>';
        container.innerHTML = html;

        // Auto-expand failed or running node
        for (var j = 0; j < stepList.length; j++) {
            if (stepList[j].state === 'failed' || stepList[j].state === 'running') {
                toggleNode(stepList[j].name);
            }
        }
    }

    // Step name Chinese mapping
    var STEP_NAMES = {
        'audio_preparing': '音频准备',
        'video_preparing': '视频准备',
        'demucs_separating': '人声分离',
        'lyric_generating': '歌词生成',
        'lyric_evaluating': '歌词评估',
        'music_generating': '音乐生成',
        'music_polling': '音乐轮询',
        'lyric_calibrating': '歌词校准',
        'subtitle_rendering': '字幕渲染',
        'subtitle_exporting': '字幕导出',
        'character_designing': '角色设计',
        'character_image_generating': '角色图生成',
        'storyboard_generating': '分镜剧本',
        'scene_video_generating': '分镜视频生成',
        'scene_video_evaluating': '分镜视频评估',
        'scene_video_concatenating': '分镜视频拼接',
        'ktv_synthesizing': 'KTV合成'
    };

    function toggleNode(stepName) {
        var body = document.getElementById('node_body_' + stepName);
        if (!body) return;
        var isExpanded = body.classList.contains('expanded');
        body.classList.toggle('expanded');

        // Load IO data on first expand
        if (!isExpanded) {
            var ioEl = document.getElementById('node_io_' + stepName);
            if (ioEl && ioEl.textContent === '点击加载...') {
                loadNodeIO(stepName);
            }
        }
    }

    function loadNodeIO(stepName) {
        var ioEl = document.getElementById('node_io_' + stepName);
        if (!ioEl) return;
        ioEl.textContent = '加载中...';

        apiGet('/api/pipeline_node.dspy?pipeline_id=' + encodeURIComponent(currentPipelineId) + '&step=' + encodeURIComponent(stepName), function(err, data) {
            if (err) { ioEl.textContent = '加载失败: ' + err; return; }
            if (data.status === 'error') { ioEl.textContent = '错误: ' + (data.message || ''); return; }

            var text = '';
            if (data.input) {
                text += '【输入】\n' + formatData(data.input) + '\n\n';
            }
            if (data.output) {
                text += '【输出】\n' + formatData(data.output);
            }
            if (!text) text = '(无数据)';
            ioEl.textContent = text;
        });
    }

    // === Node Edit ===

    function showNodeEdit(stepName, modifyType) {
        var nodeBody = document.getElementById('node_body_' + stepName);
        if (!nodeBody) return;

        // Check if edit section already exists
        var existing = document.getElementById('node_edit_' + stepName);
        if (existing) { existing.remove(); return; }

        var typeLabel = modifyType === 'input' ? '修改输入（从该节点重跑）' : '修改输出（从下一节点重跑）';

        // Get current content
        var ioEl = document.getElementById('node_io_' + stepName);
        var currentContent = '';
        if (ioEl) {
            var text = ioEl.textContent;
            if (modifyType === 'input' && text.indexOf('【输入】') >= 0) {
                currentContent = text.substring(text.indexOf('【输入】') + 4, text.indexOf('【输出】') >= 0 ? text.indexOf('【输出】') : text.length).trim();
            } else if (modifyType === 'output' && text.indexOf('【输出】') >= 0) {
                currentContent = text.substring(text.indexOf('【输出】') + 4).trim();
            }
        }

        var html = '<div class="pipeline-edit-section" id="node_edit_' + stepName + '">' +
            '<div class="pipeline-io-label">' + esc(typeLabel) + '</div>' +
            '<textarea class="pipeline-edit-textarea" id="node_edit_content_' + stepName + '">' + esc(currentContent) + '</textarea>' +
            '<input type="hidden" id="node_edit_type_' + stepName + '" value="' + modifyType + '" />' +
            '<div class="pipeline-edit-actions">' +
            '<button class="pipeline-btn pipeline-btn-primary pipeline-btn-sm" onclick="PipelineUI.submitNodeEdit(\'' + stepName + '\')" id="node_edit_btn_' + stepName + '">确认修改并重跑</button>' +
            '<button class="pipeline-btn pipeline-btn-secondary pipeline-btn-sm" onclick="document.getElementById(\'node_edit_' + stepName + '\').remove()">取消</button>' +
            '</div>' +
            '<div id="node_edit_msg_' + stepName + '"></div></div>';

        nodeBody.insertAdjacentHTML('beforeend', html);
    }

    function submitNodeEdit(stepName) {
        var content = document.getElementById('node_edit_content_' + stepName).value;
        var modifyType = document.getElementById('node_edit_type_' + stepName).value;
        var msgEl = document.getElementById('node_edit_msg_' + stepName);
        var btn = document.getElementById('node_edit_btn_' + stepName);

        if (!content.trim()) { alert('内容不能为空'); return; }

        if (btn) { btn.disabled = true; btn.textContent = '提交中...'; }
        if (msgEl) msgEl.innerHTML = '<div class="pipeline-loading">提交修改...</div>';

        apiPost('/api/pipeline_modify.dspy', {
            pipeline_id: currentPipelineId,
            step: stepName,
            modify_type: modifyType,
            content: content
        }, function(err, data) {
            if (btn) { btn.disabled = false; btn.textContent = '确认修改并重跑'; }
            if (err) {
                if (msgEl) msgEl.innerHTML = '<div class="pipeline-error">' + err + '</div>';
                return;
            }
            if (data.status === 'error') {
                if (msgEl) msgEl.innerHTML = '<div class="pipeline-error">' + (data.message || '修改失败') + '</div>';
                return;
            }

            if (msgEl) msgEl.innerHTML = '<div style="color:green;font-size:13px;margin-top:8px">修改成功！' +
                (data.new_version ? ' 新版本: v' + data.new_version : '') +
                (data.rerun_steps ? ' 重跑步骤: ' + data.rerun_steps.join(', ') : '') +
                '</div>';

            // Reload task detail after 2 seconds
            setTimeout(function() { loadTaskDetail(currentPipelineId); }, 2000);
        });
    }

    // === Utilities ===

    function formatData(obj) {
        if (typeof obj === 'string') return obj;
        try { return JSON.stringify(obj, null, 2); } catch(e) { return String(obj); }
    }

    function esc(s) {
        if (!s) return '';
        var d = document.createElement('div');
        d.appendChild(document.createTextNode(s));
        return d.innerHTML;
    }

    // === Expose Public API ===

    window.PipelineUI = {
        init: init,
        showListView: showListView,
        showCreateView: showCreateView,
        showDetailView: showDetailView,
        submitTask: submitTask,
        onModeChange: onModeChange,
        toggleNode: toggleNode,
        loadNodeIO: loadNodeIO,
        showNodeEdit: showNodeEdit,
        submitNodeEdit: submitNodeEdit
    };

    // Auto-init on DOM ready
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }

})();