"""
LifeFlow AI - Progress Stepper Component
✅ 顯示用戶當前所在步驟
✅ 視覺化流程進度
"""
import gradio as gr


def create_progress_stepper(current_step: int = 1):
    """
    創建流程進度條

    Args:
        current_step: 當前步驟 (1-4)
            1: Analyze
            2: Confirm
            3: Optimize
            4: Review

    Returns:
        HTML 組件
    """
    steps = [
        {'num': 1, 'label': 'Analyze', 'icon': '📋', 'desc': 'Extract tasks'},
        {'num': 2, 'label': 'Confirm', 'icon': '✅', 'desc': 'Review & modify'},
        {'num': 3, 'label': 'Optimize', 'icon': '⚡', 'desc': 'Route planning'},
        {'num': 4, 'label': 'Review', 'icon': '🎉', 'desc': 'Check results'}
    ]

    html = '<div class="progress-stepper">'

    for i, step in enumerate(steps):
        is_active = step['num'] == current_step
        is_complete = step['num'] < current_step

        state_class = ''
        if is_complete:
            state_class = 'complete'
        elif is_active:
            state_class = 'active'

        html += f"""
        <div class="step {state_class}">
            <div class="step-number">{step['icon']}</div>
            <div class="step-label">{step['label']}</div>
            <div class="step-desc">{step['desc']}</div>
        </div>
        """

        # 添加連接線
        if i < len(steps) - 1:
            connector_class = 'complete' if is_complete else ''
            html += f'<div class="step-connector {connector_class}"></div>'

    html += '</div>'

    # 內嵌樣式
    css = """
    <style>
    .progress-stepper {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 24px;
        background: white;
        border-radius: 16px;
        margin-bottom: 24px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    .step {
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
        flex: 1;
        min-width: 80px;
    }

    .step-number {
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: #e2e8f0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        transition: all 0.3s ease;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        margin-bottom: 8px;
    }

    .step.active .step-number {
        background: linear-gradient(135deg, #6366f1, #8b5cf6);
        color: white;
        box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2), 0 4px 8px rgba(0, 0, 0, 0.15);
        transform: scale(1.1);
        animation: pulse-ring 2s infinite;
    }

    .step.complete .step-number {
        background: #10b981;
        color: white;
        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    }

    .step-label {
        margin-top: 8px;
        font-size: 14px;
        font-weight: 600;
        color: #64748b;
        transition: color 0.3s;
    }

    .step.active .step-label {
        color: #6366f1;
        font-weight: 700;
    }

    .step.complete .step-label {
        color: #10b981;
    }

    .step-desc {
        font-size: 11px;
        color: #94a3b8;
        margin-top: 4px;
        text-align: center;
    }

    .step-connector {
        flex: 1;
        height: 3px;
        background: #e2e8f0;
        margin: 0 8px;
        transition: background 0.3s;
        position: relative;
        top: -20px;
    }

    .step-connector.complete {
        background: #10b981;
    }

    @keyframes pulse-ring {
        0% {
            box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7), 0 4px 8px rgba(0, 0, 0, 0.15);
        }
        50% {
            box-shadow: 0 0 0 8px rgba(99, 102, 241, 0), 0 4px 8px rgba(0, 0, 0, 0.15);
        }
        100% {
            box-shadow: 0 0 0 0 rgba(99, 102, 241, 0), 0 4px 8px rgba(0, 0, 0, 0.15);
        }
    }

    /* 響應式 */
    @media (max-width: 768px) {
        .progress-stepper {
            padding: 16px 8px;
        }

        .step {
            min-width: 60px;
        }

        .step-number {
            width: 44px;
            height: 44px;
            font-size: 18px;
        }

        .step-label {
            font-size: 12px;
        }

        .step-desc {
            display: none;
        }

        .step-connector {
            margin: 0 4px;
        }
    }

    @media (max-width: 480px) {
        .progress-stepper {
            flex-wrap: wrap;
            gap: 12px;
        }

        .step-connector {
            display: none;
        }

        .step {
            flex-direction: row;
            gap: 8px;
            width: calc(50% - 6px);
        }

        .step-number {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }
    }
    </style>
    """

    return gr.HTML(css + html)


def update_stepper(step_number: int):
    """更新進度條到指定步驟"""
    return create_progress_stepper(step_number)