{% extends "base.html" %}

{% block content %}
<div class="flex h-screen overflow-hidden" id="ai-analysis-view">
    <!-- Sidebar -->
    {% include 'partials/sidebar.html' %}

    <!-- Main Content -->
    <div class="flex-1 flex flex-col min-w-0 overflow-hidden bg-gray-900/80 relative">
        <!-- Top Header -->
        <header class="h-16 flex items-center justify-between px-6 z-20 bg-gray-900/80 backdrop-blur-md border-b border-blue-900/30">
            <button class="md:hidden text-gray-300 focus:outline-none" id="open-sidebar">
                <i class="fas fa-bars text-xl"></i>
            </button>
            <h1 class="text-lg md:text-2xl font-bold tech-title truncate ml-2">AI分析报告</h1>
            <div class="flex items-center space-x-4">
                 <div class="flex items-center space-x-2">
                    <div class="w-8 h-8 rounded-full bg-blue-500 flex items-center justify-center text-white font-bold border border-cyan-400 shadow-md">A</div>
                    <span class="hidden md:inline text-sm text-gray-300">{{ current_user.username }}</span>
                </div>
            </div>
        </header>

        <!-- Chat Area -->
        <main class="flex-1 overflow-y-auto p-4 md:p-6 scroll-smooth relative" id="chat-container">
            <div id="chat-messages" class="space-y-6 max-w-4xl mx-auto pb-20">
                <!-- Welcome Message -->
                <div class="flex justify-start">
                    <div class="bg-gray-800 border border-gray-700 p-4 rounded-xl rounded-tl-none shadow-lg max-w-[90%]">
                        <div class="flex items-center gap-2 mb-2">
                            <i class="fas fa-robot text-blue-400"></i>
                            <span class="text-sm font-bold text-gray-300">AI 分析助手</span>
                        </div>
                        <div class="text-gray-200 prose prose-invert max-w-none">
                            <p>你好！我是你的AI分析助手。我可以帮你分析数据库中的采集数据，并生成报表。</p>
                            <p>你可以问我：</p>
                            <ul class="list-disc list-inside text-sm text-gray-400">
                                <li>“统计一下最近采集的新闻来源分布”</li>
                                <li>“分析一下关于‘人工智能’的深度采集内容摘要”</li>
                                <li>“生成一个展示不同任务采集数量的柱状图”</li>
                            </ul>
                        </div>
                    </div>
                </div>
            </div>
        </main>

        <!-- Input Area -->
        <div class="p-4 bg-gray-900/90 border-t border-gray-800 backdrop-blur-sm z-30">
            <div class="max-w-4xl mx-auto">
                <div class="relative">
                    <textarea id="user-input" rows="1" class="w-full bg-gray-800 text-white rounded-xl pl-4 pr-12 py-3 border border-gray-700 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 focus:outline-none resize-none overflow-hidden" placeholder="输入你的分析需求..." oninput="this.style.height = ''; this.style.height = this.scrollHeight + 'px'"></textarea>
                    <button onclick="sendMessage()" id="send-btn" class="absolute right-2 bottom-2 bg-blue-600 hover:bg-blue-500 text-white w-8 h-8 rounded-lg flex items-center justify-center transition-colors shadow-lg">
                        <i class="fas fa-paper-plane text-sm"></i>
                    </button>
                </div>
                <div class="mt-2 text-xs text-center text-gray-500">
                    AI生成内容仅供参考，请以实际数据为准
                </div>
            </div>
        </div>
    </div>
</div>

    <!-- ECharts -->
    <script src="{{ url_for('static', filename='echarts/dist/echarts.min.js') }}"></script>
    <!-- Marked.js for Markdown rendering -->
    <script src="{{ url_for('static', filename='js/marked.min.js') }}"></script>
    <script>
        // Fallback for marked if CDN fails
        if (typeof marked === 'undefined') {
            console.warn('Marked.js failed to load. Using fallback parser.');
            window.marked = {
                parse: function(text) {
                    // Very basic fallback
                    if (!text) return '';
                    let html = text
                        .replace(/&/g, "&amp;")
                        .replace(/</g, "&lt;")
                        .replace(/>/g, "&gt;")
                        .replace(/```([\s\S]*?)```/g, function(match, code) { return '<pre class="bg-gray-900 p-2 rounded overflow-x-auto"><code>' + code + '</code></pre>'; })
                        .replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>')
                        .replace(/\*([^*]+)\*/g, '<em>$1</em>')
                        .replace(/\n/g, '<br>');
                    return html;
                }
            };
        }
    </script>

<script>
    // Global variables
    let conversationHistory = [];
    let chatMessages, userInput, chatContainer;

    document.addEventListener('DOMContentLoaded', function() {
        console.log('AI Analysis script loaded');
        chatMessages = document.getElementById('chat-messages');
        userInput = document.getElementById('user-input');
        chatContainer = document.getElementById('chat-container');

        // Auto-resize textarea
        if (userInput) {
            userInput.addEventListener('keydown', function(e) {
                if (e.key === 'Enter' && !e.shiftKey) {
                    e.preventDefault();
                    sendMessage();
                }
            });
        }
    });

    function scrollToBottom() {
        if (chatContainer) {
            chatContainer.scrollTop = chatContainer.scrollHeight;
        }
    }

    // Make sendMessage global
    window.sendMessage = async function() {
        if (!userInput) return;
        const message = userInput.value.trim();
        if (!message) return;

        // Add User Message
        appendMessage('user', message);
        conversationHistory.push({ role: 'user', content: message });
        
        userInput.value = '';
        userInput.style.height = 'auto';

        // Add Assistant Placeholder
        const msgId = 'msg-' + Date.now();
        appendMessage('assistant', '<i class="fas fa-circle-notch fa-spin text-blue-400"></i> 思考中...', msgId);

        try {
            const response = await fetch('/ai/api/analysis/chat', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ 
                    message: message,
                    history: conversationHistory
                })
            });

            const reader = response.body.getReader();
            const decoder = new TextDecoder();
            let assistantText = '';
            let isFirstChunk = true;
            let currentChartConfig = null;
            let chartBuffer = '';
            
            const $msgContent = $(`#${msgId} .content`);
            const $processLog = $(`#${msgId} .process-log`);
            const $chartsContainer = $(`#${msgId} .charts-container`);

            while (true) {
                const { done, value } = await reader.read();
                if (done) break;

                const chunk = decoder.decode(value, { stream: true });
                const lines = chunk.split('\n');
                
                for (const line of lines) {
                    if (line.startsWith('data: ')) {
                        const dataStr = line.slice(6).trim();
                        if (dataStr === '[DONE]') continue;
                        if (!dataStr) continue;
                        
                        try {
                            const data = JSON.parse(dataStr);
                            
                            if (data.error) {
                                $msgContent.html(`<span class="text-red-400">Error: ${data.error}</span>`);
                                return;
                            }

                            // Handle Process/Thinking Events
                            if (data.type === 'process') {
                                $processLog.removeClass('hidden');
                                $processLog.append(`
                                    <div class="flex items-center text-xs text-blue-300 bg-blue-900/20 p-2 rounded border border-blue-800/30">
                                        <i class="fas fa-circle-notch fa-spin mr-2 text-blue-400"></i>
                                        <span>${data.content}</span>
                                    </div>
                                `);
                            }
                            // Handle Regular Content
                            else if (data.content) {
                                if (isFirstChunk) {
                                    $msgContent.empty();
                                    isFirstChunk = false;
                                }
                                assistantText += data.content;
                                
                                if (typeof marked !== 'undefined') {
                                    $msgContent.html(marked.parse(assistantText));
                                } else {
                                    $msgContent.text(assistantText).css('white-space', 'pre-wrap');
                                }
                            }

                            // Handle Charts
                            if (data.chart) {
                                const chartId = 'chart-' + Date.now();
                                $chartsContainer.append(`<div id="${chartId}" class="w-full h-64 bg-gray-800 rounded-lg border border-gray-700"></div>`);
                                const option = Array.isArray(data.chart) ? buildOptionFromList(data.chart) : data.chart;
                                initChart(chartId, option);
                            }
                            
                            scrollToBottom();

                        } catch (e) {
                            console.error('Error parsing SSE:', e);
                        }
                    }
                }
            }
            
            // Add complete assistant message to history
            if (assistantText) {
                conversationHistory.push({ role: 'assistant', content: assistantText });
            }

        } catch (error) {
             $(`#${msgId} .content`).html(`<span class="text-red-400">Connection Error: ${error.message}</span>`);
        }
    }

    function appendMessage(role, content, id = null) {
        if (!chatMessages) return;
        const div = document.createElement('div');
        div.className = `flex ${role === 'user' ? 'justify-end' : 'justify-start'}`;
        if (id) div.id = id;
        
        let innerHTML = '';
        if (role === 'user') {
            innerHTML = `
                <div class="bg-blue-600 text-white p-4 rounded-xl rounded-tr-none shadow-lg max-w-[90%]">
                    <p>${escapeHtml(content)}</p>
                </div>
            `;
        } else {
            innerHTML = `
                <div class="bg-gray-800 border border-gray-700 p-4 rounded-xl rounded-tl-none shadow-lg max-w-[90%]">
                    <div class="flex items-center gap-2 mb-2">
                        <i class="fas fa-robot text-blue-400"></i>
                        <span class="text-sm font-bold text-gray-300">AI 分析助手</span>
                    </div>
                    <!-- Process Log -->
                    <div class="process-log space-y-2 mb-3 hidden bg-gray-900/50 p-3 rounded-lg border border-gray-700/50">
                        <div class="text-xs text-gray-400 font-semibold mb-1 uppercase tracking-wider">Thinking Process</div>
                    </div>
                    <!-- Content -->
                    <div class="content text-gray-200 prose prose-invert max-w-none min-h-[20px]">
                        ${content}
                    </div>
                    <!-- Charts -->
                    <div class="charts-container mt-4 space-y-4"></div>
                </div>
            `;
        }
        div.innerHTML = innerHTML;
        chatMessages.appendChild(div);
        scrollToBottom();
    }

    function escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    function initChart(domId, option) {
        const chartDom = document.getElementById(domId);
        if (!chartDom || typeof echarts === 'undefined') return;
        const myChart = echarts.init(chartDom, 'dark');
        option = option || {};
        option.backgroundColor = 'transparent';
        myChart.setOption(option, true);
        window.addEventListener('resize', function() { myChart.resize(); });
    }

    function buildOptionFromList(items) {
        if (!Array.isArray(items) || items.length === 0) return {};
        const keys = Object.keys(items[0] || {});
        let xField = null, yField = null;
        const xCandidates = ['source','name','title','label','date','time','category','key','keyword'];
        const yCandidates = ['count','value','num','total','amount','score'];
        for (const k of keys) { if (xCandidates.some(c => k.toLowerCase().includes(c))) { xField = k; break; } }
        for (const k of keys) { if (yCandidates.some(c => k.toLowerCase().includes(c))) { yField = k; break; } }
        if (!xField) xField = keys[0];
        if (!yField) yField = keys.find(k => k !== xField) || keys[0];
        const xData = items.map(it => it[xField]);
        const yData = items.map(it => it[yField]);
        return {
            title: { left: 'center', textStyle: { color: '#fff' } },
            tooltip: { trigger: 'item' },
            legend: { orient: 'vertical', left: 'left', textStyle: { color: '#ccc' } },
            xAxis: { type: 'category', data: xData, axisLabel: { color: '#ccc', rotate: xData.length > 5 ? 45 : 0 } },
            yAxis: { type: 'value', axisLabel: { color: '#ccc' }, splitLine: { lineStyle: { color: '#333' } } },
            grid: { bottom: '15%', containLabel: true },
            series: [{ data: yData, type: 'bar', itemStyle: { color: '#3b82f6' }, barMaxWidth: 50 }]
        };
    }

    // Sidebar toggle
    $(document).ready(function() {
        $('#open-sidebar').click(function() {
            $('#sidebar').toggleClass('-translate-x-full');
        });
    });
</script>
{% endblock %}