{{ define "canvas" }}
<div id="canvas-wrapper">
    <input type="radio" id="tab1" name="tab" checked>
    <input type="radio" id="tab2" name="tab">
    <input type="radio" id="tab3" name="tab">

    <div class="tabs">
        <div class="tab-labels">
            <label for="tab1">Requirements</label>
            <label for="tab2">Design</label>
            <label for="tab3">Metrics</label>
        </div>

        <!-- Requirements -->
        <div id="content1" class="tab-content">
            {{ if .Level.InterviewerRequirements }}
            <div class="requirements-section">
                <h3>Interviewer Requirements</h3>
                <ul class="requirements-list">
                    {{ range .Level.InterviewerRequirements }}
                    <li class="requirement-item">{{ . }}</li>
                    {{ end }}
                </ul>
            </div>
            {{ end }}

            {{ if .Level.FunctionalRequirements }}
            <div class="requirements-section">
                <h3>Functional Requirements</h3>
                <ul class="requirements-list">
                    {{ range .Level.FunctionalRequirements }}
                    <li class="requirement-item">{{ . }}</li>
                    {{ end }}
                </ul>
            </div>
            {{ end }}

            {{ if .Level.NonFunctionalRequirements }}
            <div class="requirements-section">
                <h3>Non-Functional Requirements</h3>
                <ul class="requirements-list">
                    {{ range .Level.NonFunctionalRequirements }}
                    <li class="requirement-item">{{ . }}</li>
                    {{ end }}
                </ul>
            </div>
            {{ end }}
        </div>

        <!-- Design-->
        <div id="content2" class="tab-content">
            <div id="sidebar">
                <div class="component-icon" draggable="true" data-type="user">
                    user
                </div>

                <div class="component-icon" draggable="true" data-type="loadBalancer">
                    load balancer
                </div>

                <div class="component-icon" draggable="true" data-type="webserver">
                    webserver
                </div>
                <div class="component-icon" draggable="true" data-type="database">
                    database
                </div>

                <div class="component-icon" draggable="true" data-type="cache">
                    cache
                </div>

                <div class="component-icon" draggable="true" data-type="messageQueue">
                    message queue
                </div>

                <div class="component-icon" draggable="true" data-type="cdn">
                    CDN
                </div>

                <div class="component-icon" draggable="true" data-type="microservice">
                    microservice node
                </div>

                <div class="component-icon" draggable="true" data-type="data pipeline">
                    data pipeline
                </div>

                <div class="component-icon" draggable="true" data-type="monitoring/alerting">
                    monitoring/alerting
                </div>

                <div class="component-icon" draggable="true" data-type="third party service">
                    third-party service
                </div>
            </div>

            <div id="canvas-container">
                <div id="connection-modal" style="display: none;" class="modal">
                    <div class="modal-content">
                        <h3>Create Connection</h3>
                        <label>
                            Label:
                            <input type="text" id="connection-label" value="Read traffic">
                        </label>
                        <label>
                            Protocol:
                            <select id="connection-protocol">
                                <option>HTTP</option>
                                <option>HTTPS</option>
                                <option>gRPC</option>
                                <option>WebSocket</option>
                                <option>GraphQL</option>
                                <option>Kafka</option>
                                <option>AMQP</option>
                                <option>MQTT</option>
                                <option>SQL</option>
                                <option>NoSQL</option>
                                <option>Redis</option>
                                <option>TLS</option>
                            </select>
                        </label>
                        <label style="margin-top: 10px;">
                            <input type="checkbox" id="connection-tls">
                            Enable TLS (encryption)
                        </label>
                        <label for="connection-capacity">Capacity Limit (RPS):</label>
                        <input type="number" id="connection-capacity" value="1000" min="1" />
                        <div class="modal-actions">
                            <button id="connection-save">Save</button>
                            <button id="connection-cancel">Cancel</button>
                        </div>
                    </div>
                </div>
                <div id="canvas-toolbar">
                    <button id="arrow-tool-btn" class="toolbar-btn">Arrow Tool</button>
                </div>
                <div id="info-panel">
                    <div id="constraints-panel">
                        <div class="panel-title">level constraints</div>
                        <div class="panel-metric"><span class="label">🎯 target rps:</span> <span
                                id="constraint-rps">{{.Level.TargetRPS}}</span></div>
                        <div class="panel-metric"><span class="label">⏱️ max p95 latency:</span> <span
                                id="constraint-latency">{{.Level.MaxP95LatencyMs}}ms</span></div>
                        <div class="panel-metric"><span class="label">💸 max cost:</span> <span
                                id="constraint-cost">${{.Level.MaxMonthlyUSD}}</span></div>
                        <div class="panel-metric"><span class="label">🔒 availability:</span> <span
                                id="constraint-availability">{{printf "%.2f" .Level.RequiredAvailabilityPct}}%</span>
                        </div>
                    </div>
                </div>

                <svg id="canvas">
                    <defs>
                        <marker id="arrowhead-start" markerWidth="10" markerHeight="7" refX="0" refY="3.5" orient="auto"
                            markerUnits="strokeWidth">
                            <path d="M10 0 L0 3.5 L10 7" fill="#ccc" />
                        </marker>
                        <marker id="arrowhead-end" markerWidth="10" markerHeight="7" refX="10" refY="3.5" orient="auto"
                            markerUnits="strokeWidth">
                            <path d="M0 0 L10 3.5 L0 7" fill="#ccc" />
                        </marker>
                    </defs>
                </svg>
                <div id="node-props-panel">
                    <h3>node properties</h3>
                    <div id="label-group" data-group="label-group">
                        <label>label:</label>
                        <input type="text" name="label" />
                    </div>
                    <div id="db-group" class="prop-group" data-group="db-group">
                        <label>replication factor:<input type="number" name="replication" min="1" step="1" /></label>
                    </div>
                    <div id="cache-group" class="prop-group" data-group="cache-group">
                        <label>cache ttl (secs):<input type="number" name="cacheTTL" min="0" step="60" /></label>
                        <label>Max Entries: <input name="maxEntries" type="number" /></label>
                        <label>Eviction Policy:
                            <select name="evictionPolicy">
                                <option value="LRU">LRU</option>
                                <option value="LFU">LFU</option>
                                <option value="Random">Random</option>
                            </select>
                        </label>
                    </div>
                    <div id="compute-group" data-group="compute-group" class="prop-group">
                        <label>CPU Cores:</label>
                        <input type="number" name="cpu" min="1" />

                        <label>RAM (GB):</label>
                        <input type="number" name="ramGb" min="1" />

                        <label>RPS Capacity:</label>
                        <input type="number" name="rpsCapacity" min="1" />

                        <label>Monthly Cost (USD):</label>
                        <input type="number" name="monthlyCostUsd" min="0" />
                    </div>
                    <div id="lb-group" data-group="lb-group" class="prop-group">
                        <label>Algorithm</label>
                        <select name="algorithm">
                            <option value="round-robin">Round Robin</option>
                            <option value="least-connections">Least Connections</option>
                        </select>
                    </div>
                    <div id="mq-group" data-group="mq-group" class="prop-group">
                        <label>Queue Capacity (,ax Messages that can be held in que)</label>
                        <input type="number" name="queueCapacity" min="1" />

                        <label>Retention Time (seconds)</label>
                        <input type="number" name="retentionSeconds" min="1" />
                    </div>
                    <div id="cdn-group" data-group="cdn-group" class="prop-group">
                        <label>TTL (seconds)</label>
                        <input type="number" name="ttl" min="1" />

                        <label>Geo Replication</label>
                        <select name="geoReplication">
                            <option value="global">Global</option>
                            <option value="regional">Regional</option>
                            <option value="custom">Custom</option>
                        </select>

                        <label>Caching Strategy</label>
                        <select name="cachingStrategy">
                            <option value="cache-first">Cache First</option>
                            <option value="network-first">Network First</option>
                            <option value="stale-while-revalidate">Stale While Revalidate</option>
                        </select>

                        <label>Compression</label>
                        <select name="compression">
                            <option value="brotli">Brotli</option>
                            <option value="gzip">Gzip</option>
                            <option value="none">None</option>
                        </select>

                        <label>HTTP/2 Support</label>
                        <select name="http2">
                            <option value="enabled">Enabled</option>
                            <option value="disabled">Disabled</option>
                        </select>
                    </div>
                    <div id="microservice-group" data-group="microservice-group" class="prop-group">
                        <label>
                            Instance Count:
                            <input type="number" name="instanceCount" value="3" min="1" />
                        </label>

                        <label>
                            CPU (vCPUs):
                            <input type="number" name="cpu" value="2" min="1" />
                        </label>

                        <label>
                            RAM (GB):
                            <input type="number" name="ramGb" value="4" min="1" />
                        </label>

                        <label>
                            RPS Capacity:
                            <input type="number" name="rpsCapacity" value="150" min="1" />
                        </label>

                        <label>
                            Monthly Cost (USD):
                            <input type="number" name="monthlyUsd" value="18" min="0" step="1" />
                        </label>

                        <label>
                            Scaling Strategy:
                            <select name="scalingStrategy">
                                <option value="auto" selected>Auto</option>
                                <option value="manual">Manual</option>
                            </select>
                        </label>

                        <label>
                            API Version:
                            <input type="text" name="apiVersion" value="v1" />
                        </label>
                    </div>
                    <div id="datapipeline-group" data-group="pipeline-group" class="prop-group">
                        <label>Batch Size</label>
                        <input type="number" name="batchSize" min="1" />

                        <label>Schedule</label>
                        <select name="schedule">
                            <option value="realtime">Real-time</option>
                            <option value="hourly">Hourly</option>
                            <option value="daily">Daily</option>
                            <option value="weekly">Weekly</option>
                        </select>

                        <label>Transformations</label>
                        <select name="transformations">
                            <option value="normalize">Normalize</option>
                            <option value="dedupe">Dedupe</option>
                            <option value="filter">Filter</option>
                            <option value="enrich">Enrich</option>
                            <option value="aggregate">Aggregate</option>
                        </select>

                        <label>Destination</label>
                        <input type="text" name="destination" placeholder="e.g. data warehouse" />
                    </div>
                    <div id="monitor-group" data-group="monitor-group" class="prop-group">
                        <label>Monitoring Tool</label>
                        <select name="tool">
                            <option value="Prometheus">Prometheus</option>
                            <option value="Datadog">Datadog</option>
                            <option value="New Relic">New Relic</option>
                            <option value="Grafana Cloud">Grafana Cloud</option>
                        </select>

                        <label>Alert Threshold (%)</label>
                        <input type="number" name="alertThreshold" min="0" max="100" />
                    </div>
                    <div id="third-party-group" data-group="third-party-group" class="prop-group">
                        <label>Provider</label>
                        <input type="text" name="provider" />

                        <label>Latency (ms)</label>
                        <input type="number" name="latency" min="0" />
                    </div>


                    <!-- PUT NEW COMPONENTS BEFORE THIS BUTTON -->
                    <button id="node-props-save" disabled>save</button>
                </div>
                <div id="bottom-panel">
                    <button id="run-button" disabled>Test Design</button>
                </div>
            </div>
        </div>
        <!-- Metrics-->
        <div id="content3" class="tab-content">This is Tab 3 content.</div>
    </div>
</div>
</div>
</div>
{{ end }}