{# app/templates/shop/account/messages.html #}
{% extends "shop/base.html" %}

{% block title %}Messages - {{ vendor.name }}{% endblock %}

{% block alpine_data %}shopMessages(){% endblock %}

{% block content %}
<div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
    <!-- Page Header -->
    <div class="mb-8 flex justify-between items-center">
        <div>
            <nav class="flex mb-4" aria-label="Breadcrumb">
                <ol class="inline-flex items-center space-x-1 md:space-x-3">
                    <li class="inline-flex items-center">
                        <a href="{{ base_url }}shop/account/dashboard"
                           class="inline-flex items-center text-sm font-medium text-gray-700 hover:text-primary dark:text-gray-400 dark:hover:text-white"
                           style="--hover-color: var(--color-primary)">
                            <span class="w-4 h-4 mr-2" x-html="$icon('home', 'w-4 h-4')"></span>
                            My Account
                        </a>
                    </li>
                    <li>
                        <div class="flex items-center">
                            <span class="w-6 h-6 text-gray-400" x-html="$icon('chevron-right', 'w-6 h-6')"></span>
                            <span class="ml-1 text-sm font-medium text-gray-500 md:ml-2 dark:text-gray-400">Messages</span>
                        </div>
                    </li>
                </ol>
            </nav>
            <h1 class="text-3xl font-bold text-gray-900 dark:text-white">Messages</h1>
            <p class="mt-2 text-gray-600 dark:text-gray-400">View your conversations with the shop</p>
        </div>
    </div>

    <!-- Loading State -->
    <template x-if="loading">
        <div class="flex justify-center items-center py-12">
            <span class="h-8 w-8 text-primary" style="color: var(--color-primary)" x-html="$icon('spinner', 'h-8 w-8 animate-spin')"></span>
        </div>
    </template>

    <!-- Main Content -->
    <template x-if="!loading">
        <div class="bg-white dark:bg-gray-800 rounded-lg shadow border border-gray-200 dark:border-gray-700">
            <!-- Conversation List View -->
            <template x-if="!selectedConversation">
                <div>
                    <!-- Filter Tabs -->
                    <div class="border-b border-gray-200 dark:border-gray-700 px-6 py-4">
                        <div class="flex space-x-4">
                            <button @click="statusFilter = null; loadConversations()"
                                    :class="statusFilter === null ? 'text-primary border-primary' : 'text-gray-500 border-transparent'"
                                    class="pb-2 px-1 border-b-2 font-medium text-sm transition-colors"
                                    style="--color: var(--color-primary)">
                                All
                            </button>
                            <button @click="statusFilter = 'open'; loadConversations()"
                                    :class="statusFilter === 'open' ? 'text-primary border-primary' : 'text-gray-500 border-transparent'"
                                    class="pb-2 px-1 border-b-2 font-medium text-sm transition-colors"
                                    style="--color: var(--color-primary)">
                                Open
                            </button>
                            <button @click="statusFilter = 'closed'; loadConversations()"
                                    :class="statusFilter === 'closed' ? 'text-primary border-primary' : 'text-gray-500 border-transparent'"
                                    class="pb-2 px-1 border-b-2 font-medium text-sm transition-colors"
                                    style="--color: var(--color-primary)">
                                Closed
                            </button>
                        </div>
                    </div>

                    <!-- Conversation List -->
                    <div class="divide-y divide-gray-200 dark:divide-gray-700">
                        <template x-if="conversations.length === 0">
                            <div class="px-6 py-12 text-center">
                                <span class="mx-auto h-12 w-12 text-gray-400 block" x-html="$icon('chat-bubble-left', 'h-12 w-12 mx-auto')"></span>
                                <h3 class="mt-2 text-sm font-medium text-gray-900 dark:text-white">No messages</h3>
                                <p class="mt-1 text-sm text-gray-500 dark:text-gray-400">
                                    You don't have any conversations yet.
                                </p>
                            </div>
                        </template>

                        <template x-for="conv in conversations" :key="conv.id">
                            <div @click="selectConversation(conv.id)"
                                 class="px-6 py-4 hover:bg-gray-50 dark:hover:bg-gray-700 cursor-pointer transition-colors">
                                <div class="flex items-start justify-between">
                                    <div class="flex-1 min-w-0">
                                        <div class="flex items-center space-x-2">
                                            <h3 class="text-sm font-semibold text-gray-900 dark:text-white truncate"
                                                :class="conv.unread_count > 0 ? 'font-bold' : ''"
                                                x-text="conv.subject"></h3>
                                            <template x-if="conv.unread_count > 0">
                                                <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-primary text-white"
                                                      style="background-color: var(--color-primary)"
                                                      x-text="conv.unread_count"></span>
                                            </template>
                                            <template x-if="conv.is_closed">
                                                <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-400">
                                                    Closed
                                                </span>
                                            </template>
                                        </div>
                                        <p class="mt-1 text-sm text-gray-600 dark:text-gray-400" x-text="conv.other_participant_name"></p>
                                    </div>
                                    <div class="flex-shrink-0 ml-4 text-right">
                                        <p class="text-xs text-gray-500 dark:text-gray-400" x-text="formatDate(conv.last_message_at)"></p>
                                        <p class="text-xs text-gray-400 dark:text-gray-500" x-text="conv.message_count + ' messages'"></p>
                                    </div>
                                </div>
                            </div>
                        </template>
                    </div>

                    <!-- Pagination -->
                    {# noqa: FE-001 - Custom pagination with currentPage/totalPages vars (not pagination.page/pagination.total) #}
                    <template x-if="totalPages > 1">
                        <div class="border-t border-gray-200 dark:border-gray-700 px-6 py-4 flex items-center justify-between">
                            <button @click="prevPage()" :disabled="currentPage === 1"
                                    class="px-3 py-1 text-sm bg-gray-100 dark:bg-gray-700 rounded disabled:opacity-50 disabled:cursor-not-allowed">
                                Previous
                            </button>
                            <span class="text-sm text-gray-600 dark:text-gray-400">
                                Page <span x-text="currentPage"></span> of <span x-text="totalPages"></span>
                            </span>
                            <button @click="nextPage()" :disabled="currentPage === totalPages"
                                    class="px-3 py-1 text-sm bg-gray-100 dark:bg-gray-700 rounded disabled:opacity-50 disabled:cursor-not-allowed">
                                Next
                            </button>
                        </div>
                    </template>
                </div>
            </template>

            <!-- Conversation Detail View -->
            <template x-if="selectedConversation">
                <div class="flex flex-col h-[600px]">
                    <!-- Conversation Header -->
                    <div class="flex items-center justify-between px-6 py-4 border-b border-gray-200 dark:border-gray-700">
                        <div class="flex items-center space-x-4">
                            <button @click="backToList()" class="text-gray-500 hover:text-gray-700 dark:hover:text-gray-300">
                                <span class="w-5 h-5" x-html="$icon('chevron-left', 'w-5 h-5')"></span>
                            </button>
                            <div>
                                <h2 class="text-lg font-semibold text-gray-900 dark:text-white" x-text="selectedConversation.subject"></h2>
                                <p class="text-sm text-gray-500 dark:text-gray-400" x-text="selectedConversation.other_participant_name"></p>
                            </div>
                        </div>
                        <template x-if="selectedConversation.is_closed">
                            <span class="inline-flex items-center px-3 py-1 rounded-full text-sm font-medium bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-400">
                                Closed
                            </span>
                        </template>
                    </div>

                    <!-- Messages -->
                    <div class="flex-1 overflow-y-auto px-6 py-4 space-y-4" x-ref="messagesContainer">
                        <template x-for="msg in selectedConversation.messages" :key="msg.id">
                            <div :class="msg.sender_type === 'customer' ? 'flex justify-end' : 'flex justify-start'">
                                <div :class="msg.sender_type === 'customer' ? 'bg-primary text-white' : 'bg-gray-100 dark:bg-gray-700 text-gray-900 dark:text-white'"
                                     class="max-w-xs lg:max-w-md px-4 py-2 rounded-lg"
                                     :style="msg.sender_type === 'customer' ? 'background-color: var(--color-primary)' : ''">
                                    <!-- System message styling -->
                                    <template x-if="msg.is_system_message">
                                        <div class="text-center text-gray-500 dark:text-gray-400 italic text-sm" x-text="msg.content"></div>
                                    </template>
                                    <template x-if="!msg.is_system_message">
                                        <div>
                                            <p class="text-sm whitespace-pre-wrap" x-text="msg.content"></p>
                                            <!-- Attachments -->
                                            <template x-if="msg.attachments && msg.attachments.length > 0">
                                                <div class="mt-2 space-y-1">
                                                    <template x-for="att in msg.attachments" :key="att.id">
                                                        <a :href="att.download_url"
                                                           target="_blank"
                                                           class="flex items-center space-x-2 text-xs underline opacity-80 hover:opacity-100">
                                                            <span class="w-4 h-4" x-html="$icon('paperclip', 'w-4 h-4')"></span>
                                                            <span x-text="att.filename"></span>
                                                        </a>
                                                    </template>
                                                </div>
                                            </template>
                                            <p class="text-xs mt-1 opacity-70" x-text="formatTime(msg.created_at)"></p>
                                        </div>
                                    </template>
                                </div>
                            </div>
                        </template>
                    </div>

                    <!-- Reply Form -->
                    <template x-if="!selectedConversation.is_closed">
                        <div class="border-t border-gray-200 dark:border-gray-700 px-6 py-4">
                            <form @submit.prevent="sendReply()">
                                <div class="flex space-x-3">
                                    <div class="flex-1">
                                        <textarea x-model="replyContent"
                                                  placeholder="Type your message..."
                                                  rows="2"
                                                  class="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-primary focus:border-transparent dark:bg-gray-700 dark:text-white resize-none"
                                                  style="--ring-color: var(--color-primary)"></textarea>
                                    </div>
                                    <div class="flex flex-col justify-end space-y-2">
                                        <!-- File upload -->
                                        <label class="cursor-pointer text-gray-500 hover:text-gray-700 dark:hover:text-gray-300">
                                            <span class="w-6 h-6" x-html="$icon('paperclip', 'w-6 h-6')"></span>
                                            <input type="file" multiple class="hidden" @change="handleFileSelect($event)">
                                        </label>
                                        <button type="submit"
                                                :disabled="!replyContent.trim() && attachments.length === 0 || sending"
                                                class="px-4 py-2 bg-primary text-white rounded-lg hover:opacity-90 disabled:opacity-50 disabled:cursor-not-allowed transition-opacity"
                                                style="background-color: var(--color-primary)">
                                            <span x-show="!sending">Send</span>
                                            <span x-show="sending" class="flex items-center">
                                                <span class="-ml-1 mr-2 h-4 w-4" x-html="$icon('spinner', 'h-4 w-4 animate-spin')"></span>
                                                Sending
                                            </span>
                                        </button>
                                    </div>
                                </div>
                                <!-- Selected files preview -->
                                <template x-if="attachments.length > 0">
                                    <div class="mt-2 flex flex-wrap gap-2">
                                        <template x-for="(file, index) in attachments" :key="index">
                                            <div class="flex items-center space-x-1 bg-gray-100 dark:bg-gray-700 px-2 py-1 rounded text-sm">
                                                <span x-text="file.name" class="max-w-[150px] truncate"></span>
                                                <button type="button" @click="removeAttachment(index)" class="text-gray-500 hover:text-red-500">
                                                    <span class="w-4 h-4" x-html="$icon('x-mark', 'w-4 h-4')"></span>
                                                </button>
                                            </div>
                                        </template>
                                    </div>
                                </template>
                            </form>
                        </div>
                    </template>

                    <!-- Closed conversation notice -->
                    <template x-if="selectedConversation.is_closed">
                        <div class="border-t border-gray-200 dark:border-gray-700 px-6 py-4 text-center text-gray-500 dark:text-gray-400">
                            This conversation is closed and cannot receive new messages.
                        </div>
                    </template>
                </div>
            </template>
        </div>
    </template>
</div>
{% endblock %}

{% block extra_scripts %}
<script>
function shopMessages() {
    return {
        ...shopLayoutData(),
        loading: true,
        conversations: [],
        selectedConversation: null,
        statusFilter: null,
        currentPage: 1,
        totalPages: 1,
        total: 0,
        limit: 20,
        replyContent: '',
        attachments: [],
        sending: false,
        pollInterval: null,

        // Preloaded conversation ID from URL
        preloadConversationId: {{ conversation_id|default('null') }},

        async init() {
            await this.loadConversations();

            // If conversation ID provided in URL, load it
            if (this.preloadConversationId) {
                await this.selectConversation(this.preloadConversationId);
            }

            // Start polling for new messages
            this.pollInterval = setInterval(() => {
                if (this.selectedConversation) {
                    this.refreshConversation();
                } else {
                    this.loadConversations();
                }
            }, 30000);
        },

        async loadConversations() {
            try {
                const token = localStorage.getItem('customer_token');
                if (!token) {
                    window.location.href = '{{ base_url }}shop/account/login?next=' + encodeURIComponent(window.location.pathname);
                    return;
                }

                const params = new URLSearchParams({
                    skip: (this.currentPage - 1) * this.limit,
                    limit: this.limit,
                });
                if (this.statusFilter) {
                    params.append('status', this.statusFilter);
                }

                const response = await fetch(`/api/v1/shop/messages?${params}`, {
                    headers: {
                        'Authorization': `Bearer ${token}`
                    }
                });
                if (!response.ok) {
                    if (response.status === 401) {
                        localStorage.removeItem('customer_token');
                        localStorage.removeItem('customer_user');
                        window.location.href = '{{ base_url }}shop/account/login?next=' + encodeURIComponent(window.location.pathname);
                        return;
                    }
                    throw new Error('Failed to load conversations');
                }

                const data = await response.json();
                this.conversations = data.conversations;
                this.total = data.total;
                this.totalPages = Math.ceil(data.total / this.limit);
            } catch (error) {
                console.error('Error loading conversations:', error);
                this.showToast('Failed to load messages', 'error');
            } finally {
                this.loading = false;
            }
        },

        async selectConversation(conversationId) {
            try {
                const token = localStorage.getItem('customer_token');
                if (!token) {
                    window.location.href = '{{ base_url }}shop/account/login?next=' + encodeURIComponent(window.location.pathname);
                    return;
                }

                const response = await fetch(`/api/v1/shop/messages/${conversationId}`, {
                    headers: {
                        'Authorization': `Bearer ${token}`
                    }
                });
                if (!response.ok) throw new Error('Failed to load conversation');

                this.selectedConversation = await response.json();

                // Scroll to bottom
                this.$nextTick(() => {
                    const container = this.$refs.messagesContainer;
                    if (container) {
                        container.scrollTop = container.scrollHeight;
                    }
                });

                // Update URL without reload
                const url = `{{ base_url }}shop/account/messages/${conversationId}`;
                history.pushState({}, '', url);
            } catch (error) {
                console.error('Error loading conversation:', error);
                this.showToast('Failed to load conversation', 'error');
            }
        },

        async refreshConversation() {
            if (!this.selectedConversation) return;

            try {
                const token = localStorage.getItem('customer_token');
                if (!token) return;

                const response = await fetch(`/api/v1/shop/messages/${this.selectedConversation.id}`, {
                    headers: {
                        'Authorization': `Bearer ${token}`
                    }
                });
                if (!response.ok) return;

                const data = await response.json();
                const oldCount = this.selectedConversation.messages.length;
                this.selectedConversation = data;

                // Scroll if new messages
                if (data.messages.length > oldCount) {
                    this.$nextTick(() => {
                        const container = this.$refs.messagesContainer;
                        if (container) {
                            container.scrollTop = container.scrollHeight;
                        }
                    });
                }
            } catch (error) {
                console.error('Error refreshing conversation:', error);
            }
        },

        backToList() {
            this.selectedConversation = null;
            this.replyContent = '';
            this.attachments = [];
            this.loadConversations();

            // Update URL
            history.pushState({}, '', '{{ base_url }}shop/account/messages');
        },

        async sendReply() {
            if ((!this.replyContent.trim() && this.attachments.length === 0) || this.sending) return;

            this.sending = true;

            try {
                const token = localStorage.getItem('customer_token');
                if (!token) {
                    window.location.href = '{{ base_url }}shop/account/login?next=' + encodeURIComponent(window.location.pathname);
                    return;
                }

                const formData = new FormData();
                formData.append('content', this.replyContent);
                for (const file of this.attachments) {
                    formData.append('attachments', file);
                }

                const response = await fetch(`/api/v1/shop/messages/${this.selectedConversation.id}/messages`, {
                    method: 'POST',
                    headers: {
                        'Authorization': `Bearer ${token}`
                    },
                    body: formData,
                });

                if (!response.ok) {
                    const error = await response.json();
                    throw new Error(error.detail || 'Failed to send message');
                }

                const data = await response.json();

                // Add message to list
                this.selectedConversation.messages.push(data.message);

                // Clear form
                this.replyContent = '';
                this.attachments = [];

                // Scroll to bottom
                this.$nextTick(() => {
                    const container = this.$refs.messagesContainer;
                    if (container) {
                        container.scrollTop = container.scrollHeight;
                    }
                });

                this.showToast('Message sent', 'success');
            } catch (error) {
                console.error('Error sending message:', error);
                this.showToast(error.message || 'Failed to send message', 'error');
            } finally {
                this.sending = false;
            }
        },

        handleFileSelect(event) {
            const files = Array.from(event.target.files);
            this.attachments.push(...files);
            event.target.value = ''; // Reset input
        },

        removeAttachment(index) {
            this.attachments.splice(index, 1);
        },

        prevPage() {
            if (this.currentPage > 1) {
                this.currentPage--;
                this.loadConversations();
            }
        },

        nextPage() {
            if (this.currentPage < this.totalPages) {
                this.currentPage++;
                this.loadConversations();
            }
        },

        formatDate(dateStr) {
            if (!dateStr) return '';
            const date = new Date(dateStr);
            const now = new Date();
            const diff = now - date;

            // Less than 24 hours
            if (diff < 86400000) {
                return date.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
            }
            // Less than 7 days
            if (diff < 604800000) {
                return date.toLocaleDateString([], { weekday: 'short' });
            }
            return date.toLocaleDateString();
        },

        formatTime(dateStr) {
            if (!dateStr) return '';
            return new Date(dateStr).toLocaleString([], {
                month: 'short',
                day: 'numeric',
                hour: '2-digit',
                minute: '2-digit'
            });
        }
    }
}
</script>
{% endblock %}