{% extends "base.html" %}
{% block title %}Order Flow Imbalance{% endblock %}

{% block content %}
<div x-data="orderFlowApp()" 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="M3 7.5L7.5 3m0 0L12 7.5M7.5 3v13.5m13.5-6L16.5 15m0 0L12 10.5m4.5 4.5V1.5"/></svg>
                </div>
                Order Flow Imbalance
            </h1>
            <p class="text-gray-400 text-sm mt-1">Buy/sell pressure analysis, delta volume, and order flow patterns</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 ? 'Analyzing...' : '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">Analyzing order flow...</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 Pressure</div>
                <div class="text-2xl font-bold text-emerald-400 mt-1" x-text="strongBuyCount"></div>
            </div>
            <div class="bg-gray-800 border border-red-700/30 rounded-xl p-4">
                <div class="text-xs text-gray-400 uppercase tracking-wider">Strong Sell Pressure</div>
                <div class="text-2xl font-bold text-red-400 mt-1" x-text="strongSellCount"></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">Avg Flow Score</div>
                <div class="text-2xl font-bold text-koin-400 mt-1" x-text="fmt(avgFlowScore, 1)"></div>
            </div>
        </div>

        <!-- Flow Distribution -->
        <template x-if="items.length > 0">
            <div class="bg-gray-800 border border-gray-700 rounded-xl p-5 mb-6">
                <h3 class="text-sm font-semibold text-gray-300 uppercase tracking-wider mb-4">Flow Score Distribution</h3>
                <div class="grid grid-cols-3 gap-3">
                    <div class="bg-emerald-900/20 border border-emerald-800/30 rounded-lg p-3 text-center">
                        <div class="text-[10px] text-gray-400 uppercase">Bullish (&gt;60)</div>
                        <div class="text-xl font-bold text-emerald-400 mt-1" x-text="items.filter(i => (i.flow_score || 0) > 60).length"></div>
                    </div>
                    <div class="bg-gray-800/50 border border-gray-700/50 rounded-lg p-3 text-center">
                        <div class="text-[10px] text-gray-400 uppercase">Neutral (40-60)</div>
                        <div class="text-xl font-bold text-gray-300 mt-1" x-text="items.filter(i => (i.flow_score || 0) >= 40 && (i.flow_score || 0) <= 60).length"></div>
                    </div>
                    <div class="bg-red-900/20 border border-red-800/30 rounded-lg p-3 text-center">
                        <div class="text-[10px] text-gray-400 uppercase">Bearish (&lt;40)</div>
                        <div class="text-xl font-bold text-red-400 mt-1" x-text="items.filter(i => (i.flow_score || 0) < 40).length"></div>
                    </div>
                </div>
                <div class="mt-4 flex h-3 rounded-full overflow-hidden bg-gray-700">
                    <div class="h-full bg-emerald-500 transition-all" :style="'width:' + (items.filter(i => (i.flow_score||0) > 60).length / Math.max(items.length,1) * 100) + '%'"></div>
                    <div class="h-full bg-gray-500 transition-all" :style="'width:' + (items.filter(i => (i.flow_score||0) >= 40 && (i.flow_score||0) <= 60).length / Math.max(items.length,1) * 100) + '%'"></div>
                    <div class="h-full bg-red-500 transition-all" :style="'width:' + (items.filter(i => (i.flow_score||0) < 40).length / Math.max(items.length,1) * 100) + '%'"></div>
                </div>
            </div>
        </template>

        <!-- 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">Understanding Order Flow</h4>
                    <p class="text-xs text-gray-400 mt-1"><strong class="text-gray-300">Flow Score</strong> measures buying vs selling pressure (0-100). Scores above 60 indicate strong buy pressure, below 40 indicate sell pressure. <strong class="text-gray-300">Absorption</strong> patterns suggest large players absorbing selling, while <strong class="text-gray-300">Exhaustion</strong> signals weakening momentum.</p>
                </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:'strong_sell',l:'Strong Sell'}]" :key="f.v">
                    <button @click="filter = f.v"
                            class="px-3 py-1.5 text-xs font-medium rounded-lg transition"
                            :class="filter === 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="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 xl:grid-cols-3 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-3">
                        <div class="flex items-center gap-2">
                            <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>
                        <span class="px-2 py-0.5 text-xs font-medium rounded-full"
                              :class="(item.signal || '').includes('buy') || (item.signal || '').includes('BUY') ? 'bg-emerald-900/50 text-emerald-300' : (item.signal || '').includes('sell') || (item.signal || '').includes('SELL') ? 'bg-red-900/50 text-red-300' : 'bg-gray-700 text-gray-300'"
                              x-text="(item.signal || 'NEUTRAL').toUpperCase()"></span>
                    </div>

                    <!-- Flow Score -->
                    <div class="flex items-center gap-4 mb-4">
                        <div class="text-4xl font-black"
                             :class="(item.flow_score || 0) > 60 ? 'text-emerald-400' : (item.flow_score || 0) < 40 ? 'text-red-400' : 'text-gray-300'"
                             x-text="fmt(item.flow_score, 0)"></div>
                        <div class="flex-1">
                            <div class="text-[10px] text-gray-500 uppercase mb-1">Flow Score</div>
                            <div class="w-full bg-gray-700 rounded-full h-2.5">
                                <div class="h-2.5 rounded-full transition-all"
                                     :class="(item.flow_score || 0) > 60 ? 'bg-emerald-500' : (item.flow_score || 0) < 40 ? 'bg-red-500' : 'bg-gray-500'"
                                     :style="'width:' + (item.flow_score || 0) + '%'"></div>
                            </div>
                        </div>
                    </div>

                    <!-- Buy/Sell Pressure Bar -->
                    <div class="mb-4">
                        <div class="flex justify-between text-[10px] text-gray-500 mb-1">
                            <span x-text="'Buy: ' + fmt(item.buy_pressure || 0, 1) + '%'"></span>
                            <span x-text="'Sell: ' + fmt(item.sell_pressure || 0, 1) + '%'"></span>
                        </div>
                        <div class="flex h-3 rounded-full overflow-hidden bg-gray-700">
                            <div class="h-full bg-emerald-500 transition-all" :style="'width:' + (item.buy_pressure || 50) + '%'"></div>
                            <div class="h-full bg-red-500 transition-all" :style="'width:' + (item.sell_pressure || 50) + '%'"></div>
                        </div>
                    </div>

                    <!-- Delta Volume -->
                    <div class="grid grid-cols-3 gap-2 mb-4">
                        <div class="bg-gray-900/40 rounded-lg p-2 text-center">
                            <div class="text-[10px] text-gray-500">Delta Vol</div>
                            <div class="text-sm font-medium mt-0.5"
                                 :class="(item.delta_volume || 0) >= 0 ? 'text-emerald-400' : 'text-red-400'"
                                 x-text="fmtCompact(item.delta_volume)"></div>
                        </div>
                        <div class="bg-gray-900/40 rounded-lg p-2 text-center">
                            <div class="text-[10px] text-gray-500">Trend</div>
                            <div class="text-sm font-medium mt-0.5"
                                 :class="item.delta_trend === 'rising' ? 'text-emerald-400' : item.delta_trend === 'falling' ? 'text-red-400' : 'text-gray-300'"
                                 x-text="item.delta_trend === 'rising' ? 'Rising &#9650;' : item.delta_trend === 'falling' ? 'Falling &#9660;' : 'Flat'"></div>
                        </div>
                        <div class="bg-gray-900/40 rounded-lg p-2 text-center">
                            <div class="text-[10px] text-gray-500">Imbalance</div>
                            <div class="text-sm font-medium text-gray-300 mt-0.5" x-text="fmt(item.imbalance_ratio, 2) + 'x'"></div>
                        </div>
                    </div>

                    <!-- Cumulative Delta -->
                    <div class="mb-4" x-show="item.cumulative_delta != null">
                        <div class="flex items-center justify-between bg-gray-900/40 rounded-lg p-2">
                            <span class="text-[10px] text-gray-500 uppercase">Cumulative Delta</span>
                            <span class="text-sm font-medium"
                                  :class="(item.cumulative_delta || 0) >= 0 ? 'text-emerald-400' : 'text-red-400'"
                                  x-text="fmtCompact(item.cumulative_delta)"></span>
                        </div>
                    </div>

                    <!-- Detected Patterns -->
                    <div class="mb-4" x-show="(item.patterns || []).length > 0">
                        <div class="text-[10px] text-gray-500 uppercase tracking-wider mb-2">Detected Patterns</div>
                        <div class="flex flex-wrap gap-1.5">
                            <template x-for="(p, pi) in item.patterns || []" :key="pi">
                                <span class="px-2 py-0.5 text-xs font-medium rounded-full"
                                      :class="patternBadge(p)" x-text="patternLabel(p)"></span>
                            </template>
                        </div>
                    </div>

                    <!-- Volume Analysis -->
                    <div class="grid grid-cols-2 gap-2 mb-4" x-show="item.volume_24h || item.volume_change_pct != null">
                        <div class="bg-gray-900/40 rounded-lg p-2 text-center">
                            <div class="text-[10px] text-gray-500">24h Volume</div>
                            <div class="text-xs font-medium text-gray-300 mt-0.5" x-text="fmtCompact(item.volume_24h)"></div>
                        </div>
                        <div class="bg-gray-900/40 rounded-lg p-2 text-center">
                            <div class="text-[10px] text-gray-500">Vol Change</div>
                            <div class="text-xs font-medium mt-0.5"
                                 :class="(item.volume_change_pct || 0) >= 0 ? 'text-emerald-400' : 'text-red-400'"
                                 x-text="fmtPct(item.volume_change_pct)"></div>
                        </div>
                    </div>

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

        <!-- Empty State -->
        <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 items 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="M3 7.5L7.5 3m0 0L12 7.5M7.5 3v13.5m13.5-6L16.5 15m0 0L12 10.5m4.5 4.5V1.5"/></svg>
            <p class="text-gray-500">No data available. Click Refresh to analyze.</p>
        </div>
    </div>
</div>

<script>
function orderFlowApp() {
    return {
        loading: false, error: null, lastRefresh: null,
        items: [], search: '', filter: 'all',

        get strongBuyCount() {
            return this.items.filter(i => (i.flow_score || 0) > 60).length;
        },
        get strongSellCount() {
            return this.items.filter(i => (i.flow_score || 0) < 40).length;
        },
        get avgFlowScore() {
            if (!this.items.length) return 0;
            return this.items.reduce((s, i) => s + (i.flow_score || 0), 0) / this.items.length;
        },

        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.filter === 'strong_buy') list = list.filter(i => (i.flow_score || 0) > 60);
            else if (this.filter === 'strong_sell') list = list.filter(i => (i.flow_score || 0) < 40);
            list.sort((a, b) => (b.flow_score || 0) - (a.flow_score || 0));
            return list;
        },

        patternBadge(p) {
            const t = (p || '').toLowerCase();
            if (t.includes('absorption')) return 'bg-blue-900/50 text-blue-300';
            if (t.includes('exhaustion')) return 'bg-amber-900/50 text-amber-300';
            if (t.includes('aggressive') && t.includes('buy')) return 'bg-emerald-900/50 text-emerald-300';
            if (t.includes('aggressive') && t.includes('sell')) return 'bg-red-900/50 text-red-300';
            return 'bg-gray-700 text-gray-300';
        },
        patternLabel(p) {
            return (p || '').replace(/_/g, ' ').replace(/\b\w/g, l => l.toUpperCase());
        },

        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/order-flow?${params}`);
                if (res.redirected) { window.location.href = '/auth/login'; 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') : '-'; },
        fmtCompact(n) {
            if (n == null) return '-';
            const abs = Math.abs(n);
            const sign = n >= 0 ? '+' : '-';
            if (abs >= 1e9) return sign + (abs / 1e9).toFixed(1) + 'B';
            if (abs >= 1e6) return sign + (abs / 1e6).toFixed(1) + 'M';
            if (abs >= 1e3) return sign + (abs / 1e3).toFixed(1) + 'K';
            return sign + abs.toFixed(0);
        },
    };
}
</script>
{% endblock %}