{% extends "base.html" %}
{% block title %}DCA Optimizer{% endblock %}

{% block content %}
<div x-data="dcaOptimizerApp()" x-init="init()" class="space-y-6">

    <!-- Header -->
    <div class="flex flex-col sm:flex-row sm:items-center justify-between gap-4">
        <div>
            <h1 class="text-2xl font-bold text-white flex items-center gap-3">
                <div class="p-2 bg-koin-600/20 rounded-xl">
                    <svg class="w-6 h-6 text-koin-400" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M2.25 18.75a60.07 60.07 0 0115.797 2.101c.727.198 1.453-.342 1.453-1.096V18.75M3.75 4.5v.75A.75.75 0 013 6h-.75m0 0v-.375c0-.621.504-1.125 1.125-1.125H20.25M2.25 6v9m18-10.5v.75c0 .414.336.75.75.75h.75m-1.5-1.5h.375c.621 0 1.125.504 1.125 1.125v9.75c0 .621-.504 1.125-1.125 1.125h-.375m1.5-1.5H21a.75.75 0 00-.75.75v.75m0 0H3.75m0 0h-.375a1.125 1.125 0 01-1.125-1.125V15m1.5 1.5v-.75A.75.75 0 003 15h-.75M15 10.5a3 3 0 11-6 0 3 3 0 016 0zm3 0h.008v.008H18V10.5zm-12 0h.008v.008H6V10.5z"/></svg>
                </div>
                DCA Optimizer
            </h1>
            <p class="text-gray-400 text-sm mt-1">Optimize Dollar-Cost Averaging strategy with timing and frequency analysis</p>
        </div>
        <div class="flex items-center gap-3">
            <span class="text-xs text-gray-500" x-text="lastRefresh ? 'Updated: ' + lastRefresh : ''"></span>
            <button @click="fetchData()" :disabled="loading"
                    class="px-4 py-2 bg-koin-600 hover:bg-koin-500 text-white text-sm font-medium rounded-lg transition disabled:opacity-50 flex items-center gap-2">
                <svg x-show="loading" class="w-4 h-4 animate-spin" 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 12h4z"/></svg>
                <span x-text="loading ? 'Optimizing...' : 'Refresh'"></span>
            </button>
        </div>
    </div>

    <!-- Loading -->
    <div x-show="loading && items.length === 0" x-cloak 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-500">Optimizing DCA strategies...</p>
        </div>
    </div>

    <!-- Error -->
    <div x-show="error" x-cloak class="bg-red-900/20 border border-red-800 rounded-xl p-4">
        <p class="text-sm text-red-400" x-text="error"></p>
    </div>

    <!-- Content -->
    <div x-show="!loading || items.length > 0" x-cloak>

        <!-- Summary Cards -->
        <div class="grid grid-cols-2 md:grid-cols-4 gap-4 mb-6">
            <div class="bg-gray-800 border border-gray-700 rounded-xl p-4">
                <div class="text-xs text-gray-400 uppercase tracking-wider">Total Analyzed</div>
                <div class="text-2xl font-bold text-white mt-1" x-text="items.length"></div>
            </div>
            <div class="bg-gray-800 border border-emerald-700/30 rounded-xl p-4">
                <div class="text-xs text-gray-400 uppercase tracking-wider">Strong Buy Now</div>
                <div class="text-2xl font-bold text-emerald-400 mt-1" x-text="strongBuyCount"></div>
            </div>
            <div class="bg-gray-800 border border-amber-700/30 rounded-xl p-4">
                <div class="text-xs text-gray-400 uppercase tracking-wider">Avg Accumulation Score</div>
                <div class="text-2xl font-bold text-amber-400 mt-1" x-text="fmt(avgAccScore, 0)"></div>
            </div>
            <div class="bg-gray-800 border border-koin-700/30 rounded-xl p-4">
                <div class="text-xs text-gray-400 uppercase tracking-wider">Best Strategy</div>
                <div class="text-lg font-bold text-koin-400 mt-1" x-text="bestStrategy"></div>
            </div>
        </div>

        <!-- Info Box -->
        <div class="bg-koin-900/15 border border-koin-700/25 rounded-xl p-4 mb-6">
            <div class="flex items-start gap-3">
                <svg class="w-5 h-5 text-koin-400 mt-0.5 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
                <div>
                    <h4 class="text-sm font-medium text-koin-300">DCA Strategy Comparison</h4>
                    <p class="text-xs text-gray-400 mt-1"><strong class="text-gray-300">Basic DCA</strong> invests fixed amounts at regular intervals. <strong class="text-gray-300">Value DCA</strong> adjusts amounts based on portfolio value deviation. <strong class="text-gray-300">Momentum DCA</strong> increases buys during uptrends. <strong class="text-gray-300">Dip-Buying DCA</strong> allocates more capital during significant price drops for lower cost basis.</p>
                    <div class="flex flex-wrap gap-3 mt-2">
                        <span class="text-[10px] text-gray-500 flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-blue-500"></span> Basic</span>
                        <span class="text-[10px] text-gray-500 flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-emerald-500"></span> Value</span>
                        <span class="text-[10px] text-gray-500 flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-amber-500"></span> Momentum</span>
                        <span class="text-[10px] text-gray-500 flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-koin-500"></span> Dip-Buying</span>
                    </div>
                </div>
            </div>
        </div>

        <!-- Filters -->
        <div class="flex flex-col sm:flex-row gap-3 mb-6">
            <div class="flex gap-1 bg-gray-900 p-1 rounded-xl border border-gray-700">
                <template x-for="f in [{v:'all',l:'All'},{v:'strong_buy',l:'Strong Buy'},{v:'buy',l:'Buy'},{v:'hold',l:'Hold'},{v:'wait',l:'Wait'}]" :key="f.v">
                    <button @click="filterRec = f.v"
                            class="px-3 py-1.5 text-xs font-medium rounded-lg transition"
                            :class="filterRec === f.v ? 'bg-koin-600 text-white' : 'text-gray-400 hover:text-gray-300 hover:bg-gray-800'"
                            x-text="f.l"></button>
                </template>
            </div>
            <div class="flex gap-1 bg-gray-900 p-1 rounded-xl border border-gray-700">
                <template x-for="s in [{v:'score',l:'By Score'},{v:'improvement',l:'By Improvement'}]" :key="s.v">
                    <button @click="sortBy = s.v"
                            class="px-3 py-1.5 text-xs font-medium rounded-lg transition"
                            :class="sortBy === s.v ? 'bg-koin-600 text-white' : 'text-gray-400 hover:text-gray-300 hover:bg-gray-800'"
                            x-text="s.l"></button>
                </template>
            </div>
            <div class="relative flex-1">
                <svg class="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-500" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/></svg>
                <input type="text" x-model="search" placeholder="Search symbol..."
                       class="w-full pl-10 pr-4 py-2 bg-gray-800 border border-gray-700 rounded-lg text-sm text-gray-200 focus:outline-none focus:ring-1 focus:ring-koin-500">
            </div>
        </div>

        <!-- Cards Grid -->
        <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
            <template x-for="(item, idx) in filteredItems" :key="item.symbol || idx">
                <div class="bg-gray-800 border border-gray-700 rounded-xl p-5 hover:border-gray-600 transition">
                    <!-- Coin Header -->
                    <div class="flex items-center justify-between mb-4">
                        <div class="flex items-center gap-3">
                            <span class="text-white font-bold text-lg" x-text="item.symbol"></span>
                            <span class="text-xs text-gray-500" x-text="fmtPrice(item.current_price)"></span>
                        </div>
                        <div class="flex items-center gap-2">
                            <span class="px-2 py-0.5 text-xs font-medium rounded-full"
                                  :class="recBadge(item.recommendation)"
                                  x-text="recLabel(item.recommendation)"></span>
                            <span class="text-sm font-bold"
                                  :class="(item.accumulation_score || 0) >= 70 ? 'text-koin-400' : (item.accumulation_score || 0) >= 40 ? 'text-amber-400' : 'text-gray-400'"
                                  x-text="fmt(item.accumulation_score, 0)"></span>
                        </div>
                    </div>

                    <!-- Accumulation Score Bar -->
                    <div class="mb-4">
                        <div class="flex items-center justify-between text-xs text-gray-500 mb-1">
                            <span>Accumulation Score</span>
                            <span x-text="fmt(item.accumulation_score, 0) + '/100'"></span>
                        </div>
                        <div class="w-full bg-gray-700 rounded-full h-2">
                            <div class="h-2 rounded-full transition-all"
                                 :class="(item.accumulation_score || 0) >= 70 ? 'bg-koin-500' : (item.accumulation_score || 0) >= 40 ? 'bg-amber-500' : 'bg-gray-500'"
                                 :style="'width:' + (item.accumulation_score || 0) + '%'"></div>
                        </div>
                    </div>

                    <!-- Optimal Frequency -->
                    <div class="flex items-center gap-2 mb-4">
                        <span class="text-xs text-gray-500">Optimal Frequency:</span>
                        <span class="px-2 py-0.5 text-xs font-medium rounded-full bg-koin-900/40 text-koin-300"
                              x-text="(item.optimal_frequency || 'weekly').toUpperCase()"></span>
                    </div>

                    <!-- Strategies Comparison Table -->
                    <div class="bg-gray-900/60 border border-gray-700/50 rounded-lg p-3 mb-4" x-show="(item.strategies || []).length > 0">
                        <div class="text-[10px] text-gray-500 uppercase tracking-wider font-medium mb-2">Strategy Comparison</div>
                        <div class="overflow-x-auto">
                            <table class="w-full text-xs">
                                <thead>
                                    <tr class="text-gray-500">
                                        <th class="text-left pb-2 font-medium">Strategy</th>
                                        <th class="text-right pb-2 font-medium">Cost Basis</th>
                                        <th class="text-right pb-2 font-medium">Improve</th>
                                        <th class="text-right pb-2 font-medium">Rating</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <template x-for="(strat, si) in item.strategies || []" :key="si">
                                        <tr class="border-t border-gray-700/50">
                                            <td class="py-1.5 text-gray-300 font-medium" x-text="strat.name || '-'"></td>
                                            <td class="py-1.5 text-right text-gray-400" x-text="fmtPrice(strat.cost_basis)"></td>
                                            <td class="py-1.5 text-right"
                                                :class="(strat.improvement || 0) > 0 ? 'text-emerald-400' : (strat.improvement || 0) < 0 ? 'text-red-400' : 'text-gray-400'"
                                                x-text="fmtPct(strat.improvement)"></td>
                                            <td class="py-1.5 text-right">
                                                <div class="flex items-center justify-end gap-1">
                                                    <div class="w-12 bg-gray-700 rounded-full h-1.5">
                                                        <div class="h-1.5 rounded-full transition-all"
                                                             :class="stratColor(strat.name)"
                                                             :style="'width:' + (strat.rating || 0) + '%'"></div>
                                                    </div>
                                                    <span class="text-gray-400 w-6 text-right" x-text="fmt(strat.rating, 0)"></span>
                                                </div>
                                            </td>
                                        </tr>
                                    </template>
                                </tbody>
                            </table>
                        </div>
                    </div>

                    <!-- Next Buy Signal -->
                    <div class="flex items-center justify-between bg-gray-900/40 rounded-lg px-3 py-2 mb-3" x-show="item.next_buy_signal">
                        <span class="text-xs text-gray-400">Next Buy Signal</span>
                        <span class="text-xs font-medium text-koin-300" x-text="item.next_buy_signal || '-'"></span>
                    </div>

                    <!-- Key Insight -->
                    <div x-show="item.key_insight" class="border-t border-gray-700 pt-3">
                        <p class="text-xs text-gray-400 leading-relaxed" x-text="item.key_insight"></p>
                    </div>
                </div>
            </template>
        </div>

        <!-- Empty States -->
        <div x-show="filteredItems.length === 0 && items.length > 0" x-cloak class="text-center py-16">
            <svg class="w-12 h-12 text-gray-600 mx-auto mb-3" fill="none" stroke="currentColor" stroke-width="1.5" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M21 21l-5.197-5.197m0 0A7.5 7.5 0 105.196 5.196a7.5 7.5 0 0010.607 10.607z"/></svg>
            <p class="text-gray-500">No assets matching your filters</p>
        </div>
        <div x-show="items.length === 0 && !loading && !error" x-cloak class="text-center py-16">
            <svg class="w-12 h-12 text-gray-600 mx-auto mb-3" fill="none" stroke="currentColor" stroke-width="1.5" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M2.25 18.75a60.07 60.07 0 0115.797 2.101c.727.198 1.453-.342 1.453-1.096V18.75M3.75 4.5v.75A.75.75 0 013 6h-.75"/></svg>
            <p class="text-gray-500">No data available. Click Refresh to scan.</p>
        </div>
    </div>
</div>

<script>
function dcaOptimizerApp() {
    return {
        loading: false, error: null, lastRefresh: null,
        items: [], search: '',
        filterRec: 'all', sortBy: 'score',

        get strongBuyCount() {
            return this.items.filter(i => i.recommendation === 'strong_buy').length;
        },
        get avgAccScore() {
            if (!this.items.length) return 0;
            return this.items.reduce((s, i) => s + (i.accumulation_score || 0), 0) / this.items.length;
        },
        get bestStrategy() {
            const counts = {};
            this.items.forEach(i => {
                const strats = i.strategies || [];
                if (strats.length) {
                    const best = strats.reduce((a, b) => (b.rating || 0) > (a.rating || 0) ? b : a, strats[0]);
                    const name = best.name || 'Basic';
                    counts[name] = (counts[name] || 0) + 1;
                }
            });
            let top = 'Basic', topCount = 0;
            for (const [k, v] of Object.entries(counts)) { if (v > topCount) { top = k; topCount = v; } }
            return top;
        },

        get filteredItems() {
            let list = [...this.items];
            if (this.search) {
                const q = this.search.toUpperCase();
                list = list.filter(i => (i.symbol || '').toUpperCase().includes(q));
            }
            if (this.filterRec !== 'all') {
                list = list.filter(i => i.recommendation === this.filterRec);
            }
            if (this.sortBy === 'improvement') {
                list.sort((a, b) => {
                    const ai = (a.strategies || []).reduce((m, s) => Math.max(m, s.improvement || 0), 0);
                    const bi = (b.strategies || []).reduce((m, s) => Math.max(m, s.improvement || 0), 0);
                    return bi - ai;
                });
            } else {
                list.sort((a, b) => (b.accumulation_score || 0) - (a.accumulation_score || 0));
            }
            return list;
        },

        recBadge(rec) {
            const r = (rec || '').toLowerCase();
            if (r === 'strong_buy') return 'bg-emerald-900/50 text-emerald-300';
            if (r === 'buy') return 'bg-green-900/50 text-green-300';
            if (r === 'hold') return 'bg-amber-900/50 text-amber-300';
            if (r === 'wait') return 'bg-gray-700 text-gray-300';
            return 'bg-gray-700 text-gray-300';
        },
        recLabel(rec) {
            return (rec || 'hold').replace(/_/g, ' ').replace(/\b\w/g, l => l.toUpperCase());
        },
        stratColor(name) {
            const n = (name || '').toLowerCase();
            if (n.includes('value')) return 'bg-emerald-500';
            if (n.includes('momentum')) return 'bg-amber-500';
            if (n.includes('dip')) return 'bg-koin-500';
            return 'bg-blue-500';
        },

        init() { this.fetchData(); },
        async fetchData() {
            this.loading = true; this.error = null;
            try {
                const params = new URLSearchParams({ asset_type: '{{ asset_mode }}' });
                const res = await fetch(`/api/v1/market/dca-optimizer?${params}`);
                if (res.redirected) { window.location.href = res.url; return; }
                const json = await res.json();
                if (json.error) { this.error = json.error; }
                else { this.items = json.items || json.results || []; }
            } catch (e) { this.error = 'Failed to load: ' + e.message; }
            finally { this.loading = false; this.lastRefresh = new Date().toLocaleTimeString('id-ID'); }
        },
        fmt(n, d=2) { return n != null ? Number(n).toFixed(d) : '-'; },
        fmtPct(n) { return n != null ? (n >= 0 ? '+' : '') + Number(n).toFixed(2) + '%' : '-'; },
        fmtPrice(n) { return n != null ? 'Rp ' + Number(n).toLocaleString('id-ID') : '-'; },
    };
}
</script>
{% endblock %}