export class FitnessDashboard {
    constructor(containerId) {
        this.container = document.getElementById(containerId);
        // Mock Data
        this.data = {
            steps: { current: 8432, goal: 10000 },
            sleep: { current: 6.5, goal: 8 },
            history: {
                steps: [4500, 7200, 10500, 8900, 6000, 11200, 8432],
                sleep: [5.5, 6.0, 7.5, 8.2, 5.0, 9.0, 6.5]
            }
        };

        this.render();
        // Delay animation to allow DOM paint
        setTimeout(() => this.animate(), 100);
    }

    render() {
        const stepPercent = Math.min((this.data.steps.current / this.data.steps.goal) * 100, 100);
        const sleepPercent = Math.min((this.data.sleep.current / this.data.sleep.goal) * 100, 100);

        // Ring Config
        const center = 100;
        const radiusOuter = 80;
        const radiusInner = 55;

        const circumOuter = 2 * Math.PI * radiusOuter;
        const circumInner = 2 * Math.PI * radiusInner;

        this.container.innerHTML = `
            <div class="fitness-container">
                <h2 class="section-title">DAILY ACTIVITY</h2>

                <!-- Top: Concentric Rings -->
                <div class="rings-wrapper">
                    <svg class="concentric-svg" viewBox="0 0 200 200">
                        <!-- Outer Track (Steps) -->
                        <circle class="ring-bg" cx="${center}" cy="${center}" r="${radiusOuter}" stroke-width="18"></circle>
                        <!-- Inner Track (Sleep) -->
                        <circle class="ring-bg" cx="${center}" cy="${center}" r="${radiusInner}" stroke-width="18"></circle>
                        
                        <!-- Outer Progress (Steps - Cyan) -->
                        <circle class="ring-progress cyan" cx="${center}" cy="${center}" r="${radiusOuter}" 
                            stroke-width="18"
                            stroke-dasharray="${circumOuter}" 
                            stroke-dashoffset="${circumOuter}"
                            data-offset="${circumOuter - (stepPercent / 100) * circumOuter}"></circle>
                            
                        <!-- Inner Progress (Sleep - Purple) -->
                        <circle class="ring-progress purple" cx="${center}" cy="${center}" r="${radiusInner}" 
                            stroke-width="18"
                            stroke-dasharray="${circumInner}" 
                            stroke-dashoffset="${circumInner}"
                            data-offset="${circumInner - (sleepPercent / 100) * circumInner}"></circle>
                            
                        <!-- Icons/Center -->
                        <image href="https://fonts.gstatic.com/s/i/materialicons/bolt/v5/24px.svg" x="90" y="90" height="20" width="20" style="filter: invert(1); opacity: 0.5;" />
                    </svg>
                    
                    <!-- Legend to explain the rings -->
                    <div class="rings-legend">
                        <div class="legend-item">
                            <span class="dot cyan"></span> STEPS
                        </div>
                        <div class="legend-item">
                            <span class="dot purple"></span> SLEEP
                        </div>
                    </div>
                </div>

                <!-- Middle: Device -->
                <div class="device-card">
                    <div class="device-info">
                        <span class="device-name">TicWatch Pro 5</span>
                        <span class="device-status">Disconnected</span>
                    </div>
                    <button id="connect-watch-btn" class="connect-glow-btn">LINK</button>
                </div>

                <!-- Box 1: Steps (Current + History) -->
                <div class="stat-card">
                    <div class="stat-header">
                        <div>
                            <span class="stat-label">STEPS</span>
                            <div class="stat-value">${this.data.steps.current}</div>
                            <div class="stat-sub">Goal: ${this.data.steps.goal}</div>
                        </div>
                        <div class="icon-box cyan-box">
                            <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M13 2L3 14h9l-1 8 10-12h-9l1-8z"/></svg>
                        </div>
                    </div>
                    
                    <div class="chart-divider"></div>
                    
                    <div class="chart-container small">
                        ${this.generateBars(this.data.history.steps, 12000, 'cyan')}
                    </div>
                </div>

                <!-- Box 2: Sleep (Current + History) -->
                <div class="stat-card">
                    <div class="stat-header">
                        <div>
                            <span class="stat-label">SLEEP</span>
                            <div class="stat-value">${this.data.sleep.current}h</div>
                            <div class="stat-sub">Goal: ${this.data.sleep.goal}h</div>
                        </div>
                        <div class="icon-box purple-box">
                            <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
                        </div>
                    </div>
                    
                    <div class="chart-divider"></div>

                    <div class="chart-container small">
                        ${this.generateBars(this.data.history.sleep, 10, 'purple')}
                    </div>
                </div>
            </div>
        `;

        this.attachEvents();
    }

    generateBars(data, max, colorClass) {
        const days = ['M', 'T', 'W', 'T', 'F', 'S', 'S'];
        return data.map((val, index) => {
            const height = Math.min((val / max) * 100, 100);
            return `
            <div class="chart-column">
                <div class="chart-bar ${colorClass}" style="height: ${height}%"></div>
                <span class="chart-day">${days[index]}</span>
            </div>
            `;
        }).join('');
    }

    animate() {
        this.container.querySelectorAll('.ring-progress').forEach(ring => {
            ring.style.strokeDashoffset = ring.dataset.offset;
        });
    }

    attachEvents() {
        const btn = this.container.querySelector('#connect-watch-btn');
        if (btn) {
            btn.addEventListener('click', () => {
                alert("Placeholder: This feature would connect to the WearOS API in the native app.");
            });
        }
    }
}