<script setup>
import { ref, watch } from 'vue';
import { api, apiURL } from '@Services/Api';

import Modal from '@Holos/Modal.vue';
import GoogleIcon from '@Shared/GoogleIcon.vue';
import Loader from '@Shared/Loader.vue';

/** Props */
const props = defineProps({
    show: {
        type: Boolean,
        required: true
    },
    client: {
        type: Object,
        default: null
    }
});

/** Emits */
const emit = defineEmits(['close']);

/** Estado */
const loading = ref(false);
const error = ref(null);
const stats = ref(null);

/** Métodos */
const fetchStats = () => {
    if (!props.client?.id) return;

    loading.value = true;
    error.value = null;
    stats.value = null;

    api.get(apiURL(`clients/${props.client.id}/stats`), {
        onSuccess: (data) => {
            stats.value = data.stats;
            loading.value = false;
        },
        onFail: (data) => {
            error.value = data.message || 'Error al obtener estadísticas del cliente.';
            loading.value = false;
        },
        onError: () => {
            error.value = 'Error de conexión. Por favor intente más tarde.';
            loading.value = false;
        }
    });
};

const formatCurrency = (value) => {
    return new Intl.NumberFormat('es-MX', {
        style: 'currency',
        currency: 'MXN'
    }).format(value || 0);
};

const formatDate = (date) => {
    if (!date) return 'N/A';
    return new Date(date).toLocaleDateString('es-MX', {
        year: 'numeric',
        month: 'long',
        day: 'numeric'
    });
};

const close = () => {
    emit('close');
};

/** Watchers */
watch(() => props.show, (newVal) => {
    if (newVal) {
        fetchStats();
    }
});
</script>

<template>
    <Modal :show="show" max-width="3xl" @close="close">
        <div class="p-6">
            <!-- Header -->
            <div class="flex items-center justify-between mb-6">
                <div class="flex items-center gap-3">
                    <div class="flex items-center justify-center w-10 h-10 rounded-full bg-indigo-100 dark:bg-indigo-900/30">
                        <GoogleIcon name="bar_chart" class="text-xl text-indigo-600 dark:text-indigo-400" />
                    </div>
                    <div>
                        <h3 class="text-lg font-semibold text-gray-900 dark:text-white">
                            Estadísticas del Cliente
                        </h3>
                        <p v-if="client" class="text-sm text-gray-500 dark:text-gray-400">
                            {{ client.name }}
                        </p>
                    </div>
                </div>
                <button
                    @click="close"
                    class="text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 transition-colors"
                >
                    <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
                    </svg>
                </button>
            </div>

            <!-- Content -->
            <div class="max-h-[70vh] overflow-y-auto">
                <!-- Loading -->
                <div v-if="loading" class="flex justify-center py-12">
                    <Loader />
                </div>

                <!-- Error -->
                <div v-else-if="error" class="text-center py-8">
                    <div class="inline-flex items-center justify-center w-16 h-16 rounded-full bg-red-100 dark:bg-red-900/30 mb-4">
                        <GoogleIcon name="error" class="text-3xl text-red-500" />
                    </div>
                    <p class="text-gray-600 dark:text-gray-400">{{ error }}</p>
                </div>

                <!-- Stats -->
                <div v-else-if="stats" class="space-y-6">
                    <!-- Tier Actual -->
                    <div v-if="stats.current_tier" class="bg-gradient-to-br from-indigo-500 to-purple-600 rounded-lg p-6 text-white">
                        <div class="flex items-center justify-between">
                            <div>
                                <p class="text-sm opacity-90 mb-1">Nivel Actual</p>
                                <h3 class="text-2xl font-bold">{{ stats.current_tier.tier_name }}</h3>
                            </div>
                            <div class="text-right">
                                <p class="text-sm opacity-90 mb-1">Descuento</p>
                                <h3 class="text-3xl font-bold">{{ stats.current_tier.discount_percentage }}%</h3>
                            </div>
                        </div>
                    </div>

                    <!-- Resumen de Compras -->
                    <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                        <!-- Total Compras -->
                        <div class="bg-green-50 dark:bg-green-900/20 rounded-lg p-4 border border-green-200 dark:border-green-800">
                            <div class="flex items-start justify-between">
                                <div>
                                    <p class="text-sm text-green-700 dark:text-green-400 mb-1">Total Compras</p>
                                    <p class="text-2xl font-bold text-green-900 dark:text-green-300">
                                        {{ formatCurrency(stats.total_purchases) }}
                                    </p>
                                </div>
                                <GoogleIcon name="shopping_cart" class="text-2xl text-green-600 dark:text-green-400" />
                            </div>
                        </div>

                        <!-- Devoluciones -->
                        <div class="bg-red-50 dark:bg-red-900/20 rounded-lg p-4 border border-red-200 dark:border-red-800">
                            <div class="flex items-start justify-between">
                                <div>
                                    <p class="text-sm text-red-700 dark:text-red-400 mb-1">Devoluciones</p>
                                    <p class="text-2xl font-bold text-red-900 dark:text-red-300">
                                        {{ formatCurrency(stats.lifetime_returns) }}
                                    </p>
                                </div>
                                <GoogleIcon name="keyboard_return" class="text-2xl text-red-600 dark:text-red-400" />
                            </div>
                        </div>

                        <!-- Compras Netas -->
                        <div class="bg-blue-50 dark:bg-blue-900/20 rounded-lg p-4 border border-blue-200 dark:border-blue-800">
                            <div class="flex items-start justify-between">
                                <div>
                                    <p class="text-sm text-blue-700 dark:text-blue-400 mb-1">Compras Netas</p>
                                    <p class="text-2xl font-bold text-blue-900 dark:text-blue-300">
                                        {{ formatCurrency(stats.net_purchases) }}
                                    </p>
                                </div>
                                <GoogleIcon name="payments" class="text-2xl text-blue-600 dark:text-blue-400" />
                            </div>
                        </div>

                        <!-- Descuentos Recibidos -->
                        <div class="bg-purple-50 dark:bg-purple-900/20 rounded-lg p-4 border border-purple-200 dark:border-purple-800">
                            <div class="flex items-start justify-between">
                                <div>
                                    <p class="text-sm text-purple-700 dark:text-purple-400 mb-1">Descuentos Recibidos</p>
                                    <p class="text-2xl font-bold text-purple-900 dark:text-purple-300">
                                        {{ formatCurrency(stats.total_discounts_received) }}
                                    </p>
                                </div>
                                <GoogleIcon name="discount" class="text-2xl text-purple-600 dark:text-purple-400" />
                            </div>
                        </div>
                    </div>

                    <!-- Información Adicional -->
                    <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                        <div class="bg-gray-50 dark:bg-gray-800 rounded-lg p-4">
                            <p class="text-sm text-gray-600 dark:text-gray-400 mb-1">Total de Transacciones</p>
                            <p class="text-xl font-semibold text-gray-900 dark:text-gray-100">
                                {{ stats.total_transactions }}
                            </p>
                        </div>

                        <div class="bg-gray-50 dark:bg-gray-800 rounded-lg p-4">
                            <p class="text-sm text-gray-600 dark:text-gray-400 mb-1">Promedio por Compra</p>
                            <p class="text-xl font-semibold text-gray-900 dark:text-gray-100">
                                {{ formatCurrency(stats.average_purchase) }}
                            </p>
                        </div>
                    </div>

                    <!-- Última Compra -->
                    <div class="bg-gray-50 dark:bg-gray-800 rounded-lg p-4">
                        <div class="flex items-center gap-2 mb-2">
                            <GoogleIcon name="schedule" class="text-lg text-gray-600 dark:text-gray-400" />
                            <p class="text-sm font-semibold text-gray-600 dark:text-gray-400">Última Compra</p>
                        </div>
                        <p class="text-lg text-gray-900 dark:text-gray-100">
                            {{ formatDate(stats.last_purchase_at) }}
                        </p>
                    </div>
                </div>
            </div>
        </div>
    </Modal>
</template>
