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<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Formulador de Piensos para Cerdos</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .custom-shadow {
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        }
        .ingredient-input:hover {
            transform: translateY(-2px);
            transition: all 0.2s ease;
        }
        .nutrition-bar {
            height: 8px;
            border-radius: 4px;
        }
        .slide-fade-enter-active {
            transition: all 0.3s ease-out;
        }
        .slide-fade-leave-active {
            transition: all 0.3s cubic-bezier(1, 0.5, 0.8, 1);
        }
        .slide-fade-enter-from,
        .slide-fade-leave-to {
            transform: translateX(20px);
            opacity: 0;
        }
    </style>
</head>
<body class="bg-gray-50 min-h-screen">
    <div class="container mx-auto px-4 py-8">
        <!-- Header -->
        <header class="mb-10 text-center">
            <h1 class="text-4xl font-bold text-indigo-800 mb-2">Formulador de Piensos para Cerdos</h1>
            <p class="text-lg text-gray-600">Crea f贸rmulas nutricionales 贸ptimas para cada etapa productiva</p>
        </header>

        <!-- Main Content -->
        <div class="grid grid-cols-1 lg:grid-cols-3 gap-8">
            <!-- Left Panel - Form -->
            <div class="lg:col-span-2">
                <div class="bg-white rounded-xl p-6 custom-shadow">
                    <div class="flex flex-wrap gap-4 mb-6">
                        <button @click="selectPreset('lechones')" class="flex-1 bg-pink-100 hover:bg-pink-200 text-pink-800 py-3 px-4 rounded-lg transition-colors">
                            <i class="fas fa-baby mr-2"></i> Lechones
                        </button>
                        <button @click="selectPreset('crecimiento')" class="flex-1 bg-blue-100 hover:bg-blue-200 text-blue-800 py-3 px-4 rounded-lg transition-colors">
                            <i class="fas fa-chart-line mr-2"></i> Crecimiento
                        </button>
                        <button @click="selectPreset('engorde')" class="flex-1 bg-green-100 hover:bg-green-200 text-green-800 py-3 px-4 rounded-lg transition-colors">
                            <i class="fas fa-weight mr-2"></i> Engorde
                        </button>
                        <button @click="selectPreset('reproductoras')" class="flex-1 bg-purple-100 hover:bg-purple-200 text-purple-800 py-3 px-4 rounded-lg transition-colors">
                            <i class="fas fa-venus mr-2"></i> Reproductoras
                        </button>
                    </div>

                    <div class="mb-6">
                        <label class="block text-gray-700 font-medium mb-2">Nombre de la f贸rmula</label>
                        <input v-model="formulaName" type="text" class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500">
                    </div>

                    <div class="mb-6">
                        <label class="block text-gray-700 font-medium mb-2">Descripci贸n</label>
                        <textarea v-model="formulaDescription" rows="2" class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500"></textarea>
                    </div>

                    <h3 class="text-xl font-semibold text-gray-800 mb-4">Ingredientes</h3>
                    
                    <div class="space-y-4 mb-6">
                        <div v-for="(ingredient, index) in ingredients" :key="index" class="ingredient-input bg-gray-50 p-4 rounded-lg custom-shadow">
                            <div class="flex flex-wrap gap-4 mb-3">
                                <div class="flex-1 min-w-[150px]">
                                    <label class="block text-sm text-gray-600 mb-1">Ingrediente</label>
                                    <select v-model="ingredient.name" class="w-full px-3 py-2 border border-gray-300 rounded-lg">
                                        <option v-for="item in ingredientOptions" :value="item.name">{{ item.name }}</option>
                                    </select>
                                </div>
                                <div class="flex-1 min-w-[100px]">
                                    <label class="block text-sm text-gray-600 mb-1">Porcentaje (%)</label>
                                    <input v-model.number="ingredient.percentage" type="number" min="0" max="100" class="w-full px-3 py-2 border border-gray-300 rounded-lg">
                                </div>
                                <div class="flex items-end">
                                    <button @click="removeIngredient(index)" class="bg-red-100 hover:bg-red-200 text-red-600 px-3 py-2 rounded-lg">
                                        <i class="fas fa-trash"></i>
                                    </button>
                                </div>
                            </div>
                            <div v-if="getIngredientDetails(ingredient.name)" class="text-xs text-gray-500">
                                Prote铆na: {{ getIngredientDetails(ingredient.name).protein }}% | 
                                Energ铆a: {{ getIngredientDetails(ingredient.name).energy }} kcal/kg | 
                                Fibra: {{ getIngredientDetails(ingredient.name).fiber }}%
                            </div>
                        </div>
                    </div>

                    <button @click="addIngredient" class="bg-indigo-100 hover:bg-indigo-200 text-indigo-700 py-2 px-4 rounded-lg mb-6">
                        <i class="fas fa-plus mr-2"></i> A帽adir Ingrediente
                    </button>

                    <div class="flex flex-wrap gap-4">
                        <button @click="calculateNutrition" class="bg-green-600 hover:bg-green-700 text-white py-3 px-6 rounded-lg font-medium">
                            <i class="fas fa-calculator mr-2"></i> Calcular Nutrici贸n
                        </button>
                        <button @click="saveFormula" class="bg-indigo-600 hover:bg-indigo-700 text-white py-3 px-6 rounded-lg font-medium">
                            <i class="fas fa-save mr-2"></i> Guardar F贸rmula
                        </button>
                        <button @click="resetForm" class="bg-gray-200 hover:bg-gray-300 text-gray-800 py-3 px-6 rounded-lg font-medium">
                            <i class="fas fa-redo mr-2"></i> Reiniciar
                        </button>
                    </div>
                </div>
            </div>

            <!-- Right Panel - Results -->
            <div class="lg:col-span-1">
                <div class="bg-white rounded-xl p-6 custom-shadow sticky top-6">
                    <h3 class="text-xl font-semibold text-gray-800 mb-4">Resultados Nutricionales</h3>
                    
                    <div v-if="totalPercentage > 0" class="mb-4">
                        <div class="flex justify-between mb-1">
                            <span class="text-sm font-medium">Total ingredientes</span>
                            <span class="text-sm font-medium">{{ totalPercentage }}%</span>
                        </div>
                        <div class="w-full bg-gray-200 rounded-full h-2.5">
                            <div :class="totalPercentage < 100 ? 'bg-yellow-500' : 'bg-green-500'" 
                                 class="h-2.5 rounded-full" 
                                 :style="'width: ' + Math.min(totalPercentage, 100) + '%'"></div>
                        </div>
                        <p v-if="totalPercentage < 100" class="text-xs text-yellow-600 mt-1">La f贸rmula est谩 incompleta (faltan {{ 100 - totalPercentage }}%)</p>
                        <p v-if="totalPercentage > 100" class="text-xs text-red-600 mt-1">La f贸rmula excede el 100% ({{ totalPercentage - 100 }}% de m谩s)</p>
                    </div>

                    <div v-if="nutritionResults" class="space-y-4">
                        <div class="p-4 bg-blue-50 rounded-lg">
                            <h4 class="font-medium text-blue-800 mb-2">Prote铆na</h4>
                            <div class="flex justify-between mb-1">
                                <span class="text-sm">{{ nutritionResults.protein }}%</span>
                                <span class="text-sm">{{ getTargetRange('protein').min }}-{{ getTargetRange('protein').max }}% (objetivo)</span>
                            </div>
                            <div class="nutrition-bar bg-gray-200">
                                <div class="nutrition-bar bg-blue-500" :style="'width: ' + getNutritionPercentage('protein') + '%'"></div>
                            </div>
                            <p v-if="nutritionResults.protein < getTargetRange('protein').min" class="text-xs text-red-600 mt-1">Bajo en prote铆na</p>
                            <p v-if="nutritionResults.protein > getTargetRange('protein').max" class="text-xs text-red-600 mt-1">Alto en prote铆na</p>
                        </div>

                        <div class="p-4 bg-green-50 rounded-lg">
                            <h4 class="font-medium text-green-800 mb-2">Energ铆a</h4>
                            <div class="flex justify-between mb-1">
                                <span class="text-sm">{{ nutritionResults.energy }} kcal/kg</span>
                                <span class="text-sm">{{ getTargetRange('energy').min }}-{{ getTargetRange('energy').max }} kcal/kg (objetivo)</span>
                            </div>
                            <div class="nutrition-bar bg-gray-200">
                                <div class="nutrition-bar bg-green-500" :style="'width: ' + getNutritionPercentage('energy') + '%'"></div>
                            </div>
                        </div>

                        <div class="p-4 bg-yellow-50 rounded-lg">
                            <h4 class="font-medium text-yellow-800 mb-2">Fibra</h4>
                            <div class="flex justify-between mb-1">
                                <span class="text-sm">{{ nutritionResults.fiber }}%</span>
                                <span class="text-sm">{{ getTargetRange('fiber').min }}-{{ getTargetRange('fiber').max }}% (objetivo)</span>
                            </div>
                            <div class="nutrition-bar bg-gray-200">
                                <div class="nutrition-bar bg-yellow-500" :style="'width: ' + getNutritionPercentage('fiber') + '%'"></div>
                            </div>
                        </div>

                        <div class="p-4 bg-purple-50 rounded-lg">
                            <h4 class="font-medium text-purple-800 mb-2">Costo estimado</h4>
                            <p class="text-lg font-semibold">${{ nutritionResults.cost.toFixed(2) }} por tonelada</p>
                        </div>
                    </div>
                    <div v-else class="text-center py-8 text-gray-500">
                        <i class="fas fa-calculator text-4xl mb-3 text-gray-300"></i>
                        <p>Ingresa los ingredientes y haz clic en "Calcular Nutrici贸n" para ver los resultados</p>
                    </div>
                </div>
            </div>
        </div>

        <!-- Saved Formulas -->
        <div v-if="savedFormulas.length > 0" class="mt-12">
            <h2 class="text-2xl font-bold text-gray-800 mb-6">F贸rmulas Guardadas</h2>
            <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
                <div v-for="(formula, index) in savedFormulas" :key="index" class="bg-white rounded-xl p-6 custom-shadow hover:shadow-md transition-shadow">
                    <div class="flex justify-between items-start mb-3">
                        <h3 class="text-lg font-semibold text-indigo-700">{{ formula.name }}</h3>
                        <button @click="deleteFormula(index)" class="text-red-400 hover:text-red-600">
                            <i class="fas fa-trash"></i>
                        </button>
                    </div>
                    <p class="text-sm text-gray-600 mb-4">{{ formula.description }}</p>
                    
                    <div class="mb-4">
                        <div class="flex justify-between text-sm mb-1">
                            <span class="font-medium">Composici贸n:</span>
                            <span class="text-gray-500">{{ getFormulaTotal(formula.ingredients) }}%</span>
                        </div>
                        <div class="w-full bg-gray-200 rounded-full h-2">
                            <div class="bg-indigo-500 h-2 rounded-full" :style="'width: ' + getFormulaTotal(formula.ingredients) + '%'"></div>
                        </div>
                    </div>
                    
                    <ul class="space-y-1 mb-4">
                        <li v-for="(ing, i) in formula.ingredients" :key="i" class="flex justify-between text-sm">
                            <span>{{ ing.name }}</span>
                            <span class="font-medium">{{ ing.percentage }}%</span>
                        </li>
                    </ul>
                    
                    <button @click="loadFormula(index)" class="w-full bg-indigo-50 hover:bg-indigo-100 text-indigo-700 py-2 px-4 rounded-lg text-sm">
                        <i class="fas fa-edit mr-2"></i> Cargar esta f贸rmula
                    </button>
                </div>
            </div>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            const app = {
                data() {
                    return {
                        formulaName: '',
                        formulaDescription: '',
                        ingredients: [
                            { name: 'Ma铆z', percentage: 0 },
                            { name: 'Soja', percentage: 0 }
                        ],
                        nutritionResults: null,
                        savedFormulas: [],
                        currentPreset: null,
                        ingredientOptions: [
                            { name: 'Ma铆z', protein: 8.5, energy: 3400, fiber: 2.3, cost: 0.15 },
                            { name: 'Soja', protein: 44.0, energy: 3300, fiber: 6.0, cost: 0.35 },
                            { name: 'Harina de pescado', protein: 65.0, energy: 3000, fiber: 0.5, cost: 0.80 },
                            { name: 'Leche en polvo', protein: 26.0, energy: 4900, fiber: 0.0, cost: 1.20 },
                            { name: 'Harina de trigo', protein: 13.0, energy: 3300, fiber: 2.5, cost: 0.25 },
                            { name: 'Grasa animal', protein: 0.0, energy: 7700, fiber: 0.0, cost: 0.50 },
                            { name: 'Sorgo', protein: 10.0, energy: 3300, fiber: 2.5, cost: 0.18 },
                            { name: 'Salvado de trigo', protein: 15.5, energy: 2500, fiber: 10.0, cost: 0.12 },
                            { name: 'Minerales', protein: 0.0, energy: 0.0, fiber: 0.0, cost: 1.50 },
                            { name: 'Vitaminas', protein: 0.0, energy: 0.0, fiber: 0.0, cost: 2.00 }
                        ],
                        presetTargets: {
                            lechones: {
                                protein: { min: 22, max: 24 },
                                energy: { min: 3400, max: 3600 },
                                fiber: { min: 3, max: 5 }
                            },
                            crecimiento: {
                                protein: { min: 18, max: 20 },
                                energy: { min: 3300, max: 3500 },
                                fiber: { min: 4, max: 6 }
                            },
                            engorde: {
                                protein: { min: 14, max: 16 },
                                energy: { min: 3400, max: 3600 },
                                fiber: { min: 5, max: 7 }
                            },
                            reproductoras: {
                                protein: { min: 16, max: 18 },
                                energy: { min: 3200, max: 3400 },
                                fiber: { min: 6, max: 8 }
                            }
                        }
                    }
                },
                computed: {
                    totalPercentage() {
                        return this.ingredients.reduce((sum, ing) => sum + (Number(ing.percentage) || 0), 0);
                    }
                },
                methods: {
                    addIngredient() {
                        this.ingredients.push({ name: 'Ma铆z', percentage: 0 });
                    },
                    removeIngredient(index) {
                        if (this.ingredients.length > 1) {
                            this.ingredients.splice(index, 1);
                        }
                    },
                    getIngredientDetails(name) {
                        return this.ingredientOptions.find(item => item.name === name);
                    },
                    calculateNutrition() {
                        if (this.totalPercentage === 0) return;
                        
                        let totalProtein = 0;
                        let totalEnergy = 0;
                        let totalFiber = 0;
                        let totalCost = 0;
                        
                        this.ingredients.forEach(ing => {
                            const details = this.getIngredientDetails(ing.name);
                            if (details) {
                                const weight = ing.percentage / this.totalPercentage;
                                totalProtein += details.protein * weight;
                                totalEnergy += details.energy * weight;
                                totalFiber += details.fiber * weight;
                                totalCost += details.cost * ing.percentage;
                            }
                        });
                        
                        // Adjust for 100% if needed
                        const adjustment = this.totalPercentage !== 100 ? (100 / this.totalPercentage) : 1;
                        
                        this.nutritionResults = {
                            protein: (totalProtein * adjustment).toFixed(1),
                            energy: Math.round(totalEnergy * adjustment),
                            fiber: (totalFiber * adjustment).toFixed(1),
                            cost: totalCost * 10 // Convert to cost per ton (assuming costs are per kg)
                        };
                    },
                    saveFormula() {
                        if (!this.formulaName.trim()) {
                            alert('Por favor ingresa un nombre para la f贸rmula');
                            return;
                        }
                        
                        if (this.totalPercentage === 0) {
                            alert('La f贸rmula no contiene ingredientes');
                            return;
                        }
                        
                        this.savedFormulas.push({
                            name: this.formulaName,
                            description: this.formulaDescription,
                            ingredients: JSON.parse(JSON.stringify(this.ingredients)),
                            preset: this.currentPreset
                        });
                        
                        // Save to localStorage
                        localStorage.setItem('savedFormulas', JSON.stringify(this.savedFormulas));
                        
                        this.formulaName = '';
                        this.formulaDescription = '';
                        alert('F贸rmula guardada con 茅xito!');
                    },
                    loadFormula(index) {
                        const formula = this.savedFormulas[index];
                        this.formulaName = formula.name;
                        this.formulaDescription = formula.description;
                        this.ingredients = JSON.parse(JSON.stringify(formula.ingredients));
                        this.currentPreset = formula.preset;
                        this.calculateNutrition();
                    },
                    deleteFormula(index) {
                        if (confirm('驴Est谩s seguro de eliminar esta f贸rmula?')) {
                            this.savedFormulas.splice(index, 1);
                            localStorage.setItem('savedFormulas', JSON.stringify(this.savedFormulas));
                        }
                    },
                    resetForm() {
                        this.formulaName = '';
                        this.formulaDescription = '';
                        this.ingredients = [{ name: 'Ma铆z', percentage: 0 }, { name: 'Soja', percentage: 0 }];
                        this.nutritionResults = null;
                        this.currentPreset = null;
                    },
                    selectPreset(preset) {
                        this.currentPreset = preset;
                        
                        // Set default ingredients based on preset
                        if (preset === 'lechones') {
                            this.ingredients = [
                                { name: 'Ma铆z', percentage: 50 },
                                { name: 'Soja', percentage: 25 },
                                { name: 'Leche en polvo', percentage: 15 },
                                { name: 'Harina de pescado', percentage: 10 }
                            ];
                            this.formulaName = 'F贸rmula para Lechones';
                            this.formulaDescription = 'Alta en prote铆na y energ铆a para el desarrollo inicial';
                        } 
                        else if (preset === 'crecimiento') {
                            this.ingredients = [
                                { name: 'Ma铆z', percentage: 60 },
                                { name: 'Soja', percentage: 30 },
                                { name: 'Harina de trigo', percentage: 10 }
                            ];
                            this.formulaName = 'F贸rmula para Crecimiento';
                            this.formulaDescription = 'Balance de prote铆na y energ铆a para desarrollo 贸ptimo';
                        }
                        else if (preset === 'engorde') {
                            this.ingredients = [
                                { name: 'Ma铆z', percentage: 70 },
                                { name: 'Soja', percentage: 20 },
                                { name: 'Grasa animal', percentage: 10 }
                            ];
                            this.formulaName = 'F贸rmula para Engorde';
                            this.formulaDescription = 'Alta en energ铆a para aumento de peso';
                        }
                        else if (preset === 'reproductoras') {
                            this.ingredients = [
                                { name: 'Ma铆z', percentage: 60 },
                                { name: 'Soja', percentage: 30 },
                                { name: 'Minerales', percentage: 5 },
                                { name: 'Vitaminas', percentage: 5 }
                            ];
                            this.formulaName = 'F贸rmula para Reproductoras';
                            this.formulaDescription = 'Balance nutricional para salud y reproducci贸n';
                        }
                        
                        this.calculateNutrition();
                    },
                    getTargetRange(nutrient) {
                        if (this.currentPreset && this.presetTargets[this.currentPreset]) {
                            return this.presetTargets[this.currentPreset][nutrient];
                        }
                        // Default ranges if no preset selected
                        return {
                            protein: { min: 14, max: 24 },
                            energy: { min: 3200, max: 3600 },
                            fiber: { min: 3, max: 8 }
                        };
                    },
                    getNutritionPercentage(nutrient) {
                        const value = parseFloat(this.nutritionResults[nutrient]);
                        const range = this.getTargetRange(nutrient);
                        const target = (range.min + range.max) / 2;
                        const span = range.max - range.min;
                        
                        // Calculate position within range (0-100%)
                        let percentage = ((value - (target - span/2)) / span) * 100;
                        
                        // Clamp between 0 and 100
                        return Math.min(100, Math.max(0, percentage));
                    },
                    getFormulaTotal(ingredients) {
                        return ingredients.reduce((sum, ing) => sum + (Number(ing.percentage) || 0), 0);
                    }
                },
                mounted() {
                    // Load saved formulas from localStorage
                    const saved = localStorage.getItem('savedFormulas');
                    if (saved) {
                        this.savedFormulas = JSON.parse(saved);
                    }
                }
            };
            
            Vue.createApp(app).mount('body');
        });
    </script>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</body>
</html>