{% extends "base.html" %}
{% block title %}Auto-Rebalancer{% endblock %}

{% block content %}
<div x-data="autoRebalancerApp()" x-init="init()" class="space-y-6">
    <!-- Header -->
    <div class="flex items-center justify-between">
        <div>
            <h1 class="text-2xl font-bold text-white">Auto-Rebalancer</h1>
            <p class="mt-1 text-sm text-gray-400">Optimasi alokasi portfolio dan rebalancing otomatis</p>
        </div>
        <div class="flex items-center gap-3">
            <span class="text-xs text-gray-500" x-text="lastRefresh ? 'Last refresh: ' + lastRefresh : ''"></span>
            <button @click="fetchData()" :disabled="loading"
                    class="px-3 py-1.5 text-xs bg-gray-800 hover:bg-gray-700 text-gray-300 rounded-lg transition disabled:opacity-50">
                Refresh
            </button>
        </div>
    </div>

    <!-- Strategy Selector -->
    <div class="flex flex-wrap items-center gap-3">
        <label class="text-xs text-gray-500">Strategy:</label>
        <template x-for="s in strategies" :key="s.key">
            <button @click="strategy = s.key; fetchData()"
                    class="px-3.5 py-1.5 text-xs font-medium rounded-lg border transition"
                    :class="strategy === s.key
                        ? 'bg-koin-600 border-koin-500 text-white'
                        : 'bg-gray-800 border-gray-700 text-gray-400 hover:border-gray-600 hover:text-gray-300'">
                <span x-text="s.label"></span>
            </button>
        </template>
    </div>

    <!-- Loading State -->
    <div x-show="loading" class="flex items-center justify-center py-16">
        <div class="text-center">
            <svg class="w-8 h-8 animate-spin text-koin-400 mx-auto mb-3" fill="none" viewBox="0 0 24 24">
                <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"/>
                <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"/>
            </svg>
            <p class="text-sm text-gray-400">Calculating optimal allocation...</p>
        </div>
    </div>

    <template x-if="!loading && data">
        <div class="space-y-6">
            <!-- Summary Cards -->
            <div class="grid grid-cols-2 md:grid-cols-5 gap-4">
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-4">
                    <p class="text-xs text-gray-500 uppercase tracking-wider">Total Drift</p>
                    <p class="text-2xl font-bold mt-1"
                       :class="(data.summary?.total_drift || 0) > 5 ? 'text-red-400' : (data.summary?.total_drift || 0) > 2 ? 'text-amber-400' : 'text-emerald-400'"
                       x-text="fmt(data.summary?.total_drift) + '%'"></p>
                </div>
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-4">
                    <p class="text-xs text-gray-500 uppercase tracking-wider">Needs Rebalance</p>
                    <p class="text-2xl font-bold mt-1">
                        <span x-show="data.summary?.needs_rebalance" class="px-2 py-0.5 rounded-full text-sm bg-red-900/50 text-red-400">Yes</span>
                        <span x-show="!data.summary?.needs_rebalance" class="px-2 py-0.5 rounded-full text-sm bg-emerald-900/50 text-emerald-400">No</span>
                    </p>
                </div>
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-4">
                    <p class="text-xs text-gray-500 uppercase tracking-wider">Assets to Buy</p>
                    <p class="text-2xl font-bold text-emerald-400 mt-1" x-text="data.summary?.assets_to_buy || 0"></p>
                </div>
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-4">
                    <p class="text-xs text-gray-500 uppercase tracking-wider">Assets to Sell</p>
                    <p class="text-2xl font-bold text-red-400 mt-1" x-text="data.summary?.assets_to_sell || 0"></p>
                </div>
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-4">
                    <p class="text-xs text-gray-500 uppercase tracking-wider">Est. Trade Cost</p>
                    <p class="text-2xl font-bold text-gray-300 mt-1" x-text="'$' + fmtAmount(data.summary?.estimated_cost)"></p>
                </div>
            </div>

            <!-- Drift Indicator -->
            <div class="bg-gray-900 border border-gray-800 rounded-xl p-6">
                <h2 class="text-lg font-semibold text-white mb-2">Portfolio Drift Meter</h2>
                <p class="text-sm text-gray-400 mb-4">Total portfolio drift dari target alokasi. Threshold rebalance: 5%</p>
                <div class="relative">
                    <div class="w-full bg-gray-800 rounded-full h-6 relative overflow-hidden">
                        <div class="h-full rounded-full transition-all duration-500"
                             :class="(data.summary?.total_drift || 0) > 10 ? 'bg-red-500' : (data.summary?.total_drift || 0) > 5 ? 'bg-amber-500' : 'bg-emerald-500'"
                             :style="'width:' + Math.min(100, (data.summary?.total_drift || 0) * 5) + '%'"></div>
                        <!-- Threshold line at 5% -->
                        <div class="absolute top-0 bottom-0 w-0.5 bg-white/50" style="left: 25%"></div>
                    </div>
                    <div class="flex justify-between mt-1 text-xs text-gray-500">
                        <span>0%</span>
                        <span class="text-white/60" style="position:absolute;left:25%;transform:translateX(-50%)">5% threshold</span>
                        <span>20%+</span>
                    </div>
                </div>
            </div>

            <!-- Allocation Comparison -->
            <div class="bg-gray-900 border border-gray-800 rounded-xl p-6">
                <h2 class="text-lg font-semibold text-white mb-1">Allocation Comparison</h2>
                <p class="text-sm text-gray-400 mb-4">Current vs target weight per asset</p>
                <div class="space-y-3">
                    <template x-for="item in data.allocations || []" :key="item.symbol">
                        <div class="flex items-center gap-3">
                            <span class="text-xs font-mono text-gray-300 w-16 text-right flex-shrink-0" x-text="item.symbol"></span>
                            <div class="flex-1 space-y-1">
                                <!-- Current Weight -->
                                <div class="flex items-center gap-2">
                                    <span class="text-[10px] text-gray-500 w-12">Current</span>
                                    <div class="flex-1 bg-gray-800 rounded-full h-3 relative overflow-hidden">
                                        <div class="h-full rounded-full bg-gray-500"
                                             :style="'width:' + Math.min(100, (item.current_weight || 0)) + '%'"></div>
                                    </div>
                                    <span class="text-xs font-mono text-gray-400 w-12 text-right" x-text="fmt(item.current_weight) + '%'"></span>
                                </div>
                                <!-- Target Weight -->
                                <div class="flex items-center gap-2">
                                    <span class="text-[10px] text-koin-400 w-12">Target</span>
                                    <div class="flex-1 bg-gray-800 rounded-full h-3 relative overflow-hidden">
                                        <div class="h-full rounded-full bg-koin-500/70"
                                             :style="'width:' + Math.min(100, (item.target_weight || 0)) + '%'"></div>
                                    </div>
                                    <span class="text-xs font-mono text-koin-400 w-12 text-right" x-text="fmt(item.target_weight) + '%'"></span>
                                </div>
                            </div>
                            <!-- Drift badge -->
                            <span class="text-xs font-mono w-14 text-right flex-shrink-0"
                                  :class="Math.abs(item.drift || 0) > 3 ? 'text-red-400' : Math.abs(item.drift || 0) > 1 ? 'text-amber-400' : 'text-gray-500'"
                                  x-text="(item.drift > 0 ? '+' : '') + fmt(item.drift) + '%'"></span>
                        </div>
                    </template>
                </div>
                <p x-show="!data.allocations || data.allocations.length === 0" class="text-sm text-gray-500 text-center py-6">No allocation data.</p>
            </div>

            <!-- Trade Suggestions Table -->
            <div class="bg-gray-900 border border-gray-800 rounded-xl p-6">
                <h2 class="text-lg font-semibold text-white mb-4">Trade Suggestions</h2>
                <div class="overflow-x-auto">
                    <table class="w-full text-sm">
                        <thead class="text-xs text-gray-500 uppercase bg-gray-900/50">
                            <tr>
                                <th class="px-3 py-2 text-left">Symbol</th>
                                <th class="px-3 py-2 text-right">Current %</th>
                                <th class="px-3 py-2 text-right">Target %</th>
                                <th class="px-3 py-2 text-right">Drift %</th>
                                <th class="px-3 py-2 text-center">Action</th>
                                <th class="px-3 py-2 text-right">Amount ($)</th>
                                <th class="px-3 py-2 text-center">Priority</th>
                            </tr>
                        </thead>
                        <tbody class="divide-y divide-gray-800">
                            <template x-for="trade in data.trades || []" :key="trade.symbol">
                                <tr class="hover:bg-gray-800/50 transition">
                                    <td class="px-3 py-2.5 text-left font-medium text-white" x-text="trade.symbol"></td>
                                    <td class="px-3 py-2.5 text-right font-mono text-gray-300" x-text="fmt(trade.current_weight) + '%'"></td>
                                    <td class="px-3 py-2.5 text-right font-mono text-koin-400" x-text="fmt(trade.target_weight) + '%'"></td>
                                    <td class="px-3 py-2.5 text-right font-mono"
                                        :class="(trade.drift || 0) > 0 ? 'text-emerald-400' : (trade.drift || 0) < 0 ? 'text-red-400' : 'text-gray-500'"
                                        x-text="(trade.drift > 0 ? '+' : '') + fmt(trade.drift) + '%'"></td>
                                    <td class="px-3 py-2.5 text-center">
                                        <span class="text-xs px-2 py-0.5 rounded-full font-medium"
                                              :class="actionBadge(trade.action)"
                                              x-text="trade.action || '-'"></span>
                                    </td>
                                    <td class="px-3 py-2.5 text-right font-mono text-gray-300" x-text="'$' + fmtAmount(trade.amount)"></td>
                                    <td class="px-3 py-2.5 text-center">
                                        <span class="text-xs px-2 py-0.5 rounded-full"
                                              :class="priorityBadge(trade.priority)"
                                              x-text="trade.priority || '-'"></span>
                                    </td>
                                </tr>
                            </template>
                        </tbody>
                    </table>
                </div>
                <p x-show="!data.trades || data.trades.length === 0" class="text-sm text-gray-500 text-center py-8">No trades needed.</p>
            </div>

            <!-- Strategy Description + Expected Improvement -->
            <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                <!-- Strategy Info -->
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-6">
                    <h2 class="text-lg font-semibold text-white mb-2">Strategy Description</h2>
                    <p class="text-sm text-gray-400" x-text="strategyDescription()"></p>
                </div>
                <!-- Expected Improvement -->
                <div class="bg-gray-900 border border-gray-800 rounded-xl p-6">
                    <h2 class="text-lg font-semibold text-white mb-4">Expected Improvement</h2>
                    <div class="grid grid-cols-2 gap-4">
                        <div class="bg-gray-800/50 rounded-lg p-3 text-center">
                            <p class="text-xs text-gray-500 uppercase">Sharpe Ratio</p>
                            <div class="flex items-center justify-center gap-2 mt-1">
                                <span class="text-sm text-gray-500" x-text="fmt(data.improvement?.current_sharpe)"></span>
                                <svg class="w-3 h-3 text-gray-600" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 8l4 4m0 0l-4 4m4-4H3"/></svg>
                                <span class="text-sm font-bold text-emerald-400" x-text="fmt(data.improvement?.projected_sharpe)"></span>
                            </div>
                        </div>
                        <div class="bg-gray-800/50 rounded-lg p-3 text-center">
                            <p class="text-xs text-gray-500 uppercase">Risk Reduction</p>
                            <p class="text-xl font-bold text-emerald-400 mt-1" x-text="fmt(data.improvement?.risk_reduction) + '%'"></p>
                        </div>
                        <div class="bg-gray-800/50 rounded-lg p-3 text-center">
                            <p class="text-xs text-gray-500 uppercase">Diversification</p>
                            <p class="text-xl font-bold text-koin-400 mt-1" x-text="fmt(data.improvement?.diversification_score)"></p>
                        </div>
                        <div class="bg-gray-800/50 rounded-lg p-3 text-center">
                            <p class="text-xs text-gray-500 uppercase">Max Drawdown</p>
                            <div class="flex items-center justify-center gap-2 mt-1">
                                <span class="text-sm text-red-400" x-text="fmt(data.improvement?.current_max_dd) + '%'"></span>
                                <svg class="w-3 h-3 text-gray-600" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 8l4 4m0 0l-4 4m4-4H3"/></svg>
                                <span class="text-sm font-bold text-emerald-400" x-text="fmt(data.improvement?.projected_max_dd) + '%'"></span>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </template>

    <!-- Error State -->
    <div x-show="!loading && error" class="bg-red-900/20 border border-red-800 rounded-xl p-6 text-center">
        <p class="text-sm text-red-400" x-text="error"></p>
        <button @click="fetchData()" class="mt-3 px-4 py-1.5 text-xs bg-red-800 hover:bg-red-700 text-red-200 rounded-lg transition">Retry</button>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
function autoRebalancerApp() {
    return {
        asset_type: '{{ asset_mode }}',
        strategy: 'equal_weight',
        loading: false,
        data: null,
        error: null,
        lastRefresh: null,
        strategies: [
            { key: 'equal_weight', label: 'Equal Weight' },
            { key: 'market_cap', label: 'Market Cap Weight' },
            { key: 'risk_parity', label: 'Risk Parity' },
            { key: 'momentum_tilt', label: 'Momentum Tilt' },
        ],

        init() {
            this.fetchData();
        },

        async fetchData() {
            this.loading = true;
            this.error = null;
            try {
                const resp = await fetch(`/api/v1/market/auto-rebalancer?asset_type=${this.asset_type}&strategy=${this.strategy}`);
                if (resp.redirected) { window.location.href = '/auth/login'; return; }
                const json = await resp.json();
                if (json.error) {
                    this.error = json.error;
                } else {
                    this.data = json;
                }
                this.lastRefresh = new Date().toLocaleTimeString('id-ID');
            } catch (e) {
                this.error = 'Failed to fetch rebalancer data: ' + e.message;
            }
            this.loading = false;
        },

        fmt(v) {
            if (v == null) return '-';
            return Number(v).toFixed(2);
        },

        fmtAmount(v) {
            if (v == null) return '-';
            return Number(v).toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
        },

        actionBadge(action) {
            const a = (action || '').toUpperCase();
            if (a === 'BUY') return 'bg-emerald-900/50 text-emerald-400';
            if (a === 'SELL') return 'bg-red-900/50 text-red-400';
            return 'bg-gray-800 text-gray-500';
        },

        priorityBadge(p) {
            const v = (p || '').toLowerCase();
            if (v === 'high') return 'bg-red-900/50 text-red-400';
            if (v === 'medium') return 'bg-amber-900/50 text-amber-400';
            if (v === 'low') return 'bg-gray-700 text-gray-400';
            return 'bg-gray-800 text-gray-500';
        },

        strategyDescription() {
            const desc = {
                equal_weight: 'Equal Weight: Alokasi merata di semua aset. Sederhana dan efektif untuk diversifikasi. Tidak mempertimbangkan market cap atau risiko individual, cocok untuk investor yang percaya semua aset memiliki potensi yang sama.',
                market_cap: 'Market Cap Weight: Alokasi berdasarkan kapitalisasi pasar. Aset dengan market cap lebih besar mendapat porsi lebih besar. Mencerminkan sentimen pasar secara keseluruhan dan meminimalkan turnover.',
                risk_parity: 'Risk Parity: Alokasi berdasarkan kontribusi risiko yang seimbang. Aset yang lebih volatil mendapat porsi lebih kecil, sehingga setiap aset berkontribusi risiko yang sama ke portfolio. Optimal untuk risk-adjusted returns.',
                momentum_tilt: 'Momentum Tilt: Overweight pada aset dengan momentum positif (trending up) dan underweight pada aset yang underperforming. Menggabungkan mean-reversion dan trend-following untuk capture alpha.',
            };
            return desc[this.strategy] || 'Select a strategy to see its description.';
        },
    };
}
</script>
{% endblock %}