package app

import (
    "fmt"
    "github.com/seaweedfs/seaweedfs/weed/admin/dash"
)

templ ClusterVolumes(data dash.ClusterVolumesData) {
    <div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
        <h1 class="h2">
            <i class="fas fa-database me-2"></i>Cluster Volumes
        </h1>
        <div class="btn-toolbar mb-2 mb-md-0">
            <div class="btn-group me-2">
                <select class="form-select form-select-sm me-2" id="pageSizeSelect" onchange="changePageSize()" style="width: auto;">
                    <option value="50" if data.PageSize == 50 { selected="selected" }>50 per page</option>
                    <option value="100" if data.PageSize == 100 { selected="selected" }>100 per page</option>
                    <option value="200" if data.PageSize == 200 { selected="selected" }>200 per page</option>
                    <option value="500" if data.PageSize == 500 { selected="selected" }>500 per page</option>
                </select>
                <button type="button" class="btn btn-sm btn-outline-primary" onclick="exportVolumes()">
                    <i class="fas fa-download me-1"></i>Export
                </button>
            </div>
        </div>
    </div>

    <div id="volumes-content">
        <!-- Summary Cards -->
        <div class="row mb-4">
            <div class="col-xl-3 col-md-6 mb-4">
                <div class="card border-left-primary shadow h-100 py-2">
                    <div class="card-body">
                        <div class="row no-gutters align-items-center">
                            <div class="col mr-2">
                                <div class="text-xs font-weight-bold text-primary text-uppercase mb-1">
                                    Total Volumes
                                </div>
                                <div class="h5 mb-0 font-weight-bold text-gray-800">
                                    {fmt.Sprintf("%d", data.TotalVolumes)}
                                </div>
                            </div>
                            <div class="col-auto">
                                <i class="fas fa-database fa-2x text-gray-300"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="col-xl-3 col-md-6 mb-4">
                <div class="card border-left-success shadow h-100 py-2">
                    <div class="card-body">
                        <div class="row no-gutters align-items-center">
                            <div class="col mr-2">
                                <div class="text-xs font-weight-bold text-success text-uppercase mb-1">
                                    Active Volumes
                                </div>
                                <div class="h5 mb-0 font-weight-bold text-gray-800">
                                    {fmt.Sprintf("%d", countActiveVolumes(data.Volumes))}
                                </div>
                            </div>
                            <div class="col-auto">
                                <i class="fas fa-check-circle fa-2x text-gray-300"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="col-xl-3 col-md-6 mb-4">
                <div class="card border-left-info shadow h-100 py-2">
                    <div class="card-body">
                        <div class="row no-gutters align-items-center">
                            <div class="col mr-2">
                                <div class="text-xs font-weight-bold text-info text-uppercase mb-1">
                                    Data Centers
                                </div>
                                <div class="h5 mb-0 font-weight-bold text-gray-800">
                                    {fmt.Sprintf("%d", countUniqueDataCenters(data.Volumes))}
                                </div>
                            </div>
                            <div class="col-auto">
                                <i class="fas fa-building fa-2x text-gray-300"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="col-xl-3 col-md-6 mb-4">
                <div class="card border-left-warning shadow h-100 py-2">
                    <div class="card-body">
                        <div class="row no-gutters align-items-center">
                            <div class="col mr-2">
                                <div class="text-xs font-weight-bold text-warning text-uppercase mb-1">
                                    Total Size
                                </div>
                                <div class="h5 mb-0 font-weight-bold text-gray-800">
                                    {formatBytes(data.TotalSize)}
                                </div>
                            </div>
                            <div class="col-auto">
                                <i class="fas fa-hdd fa-2x text-gray-300"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Volumes Table -->
        <div class="card shadow mb-4">
            <div class="card-header py-3">
                <h6 class="m-0 font-weight-bold text-primary">
                    <i class="fas fa-database me-2"></i>Volume Details
                </h6>
            </div>
            <div class="card-body">
                if len(data.Volumes) > 0 {
                    <div class="table-responsive">
                        <table class="table table-hover" id="volumesTable">
                            <thead>
                                <tr>
                                    <th>
                                        <a href="#" onclick="sortTable('id')" class="text-decoration-none text-dark">
                                            Volume ID
                                            @getSortIcon("id", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('server')" class="text-decoration-none text-dark">
                                            Server
                                            @getSortIcon("server", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('datacenter')" class="text-decoration-none text-dark">
                                            Data Center
                                            @getSortIcon("datacenter", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('rack')" class="text-decoration-none text-dark">
                                            Rack
                                            @getSortIcon("rack", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('collection')" class="text-decoration-none text-dark">
                                            Collection
                                            @getSortIcon("collection", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('size')" class="text-decoration-none text-dark">
                                            Size
                                            @getSortIcon("size", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('filecount')" class="text-decoration-none text-dark">
                                            File Count
                                            @getSortIcon("filecount", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('replication')" class="text-decoration-none text-dark">
                                            Replication
                                            @getSortIcon("replication", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>
                                        <a href="#" onclick="sortTable('status')" class="text-decoration-none text-dark">
                                            Status
                                            @getSortIcon("status", data.SortBy, data.SortOrder)
                                        </a>
                                    </th>
                                    <th>Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                for _, volume := range data.Volumes {
                                    <tr>
                                        <td>
                                            <code>{fmt.Sprintf("%d", volume.ID)}</code>
                                        </td>
                                        <td>
                                            <a href={templ.SafeURL(fmt.Sprintf("http://%s", volume.Server))} target="_blank" class="text-decoration-none">
                                                {volume.Server}
                                                <i class="fas fa-external-link-alt ms-1 text-muted"></i>
                                            </a>
                                        </td>
                                        <td>
                                            <span class="badge bg-light text-dark">{volume.DataCenter}</span>
                                        </td>
                                        <td>
                                            <span class="badge bg-light text-dark">{volume.Rack}</span>
                                        </td>
                                        <td>
                                            <span class="badge bg-secondary">{volume.Collection}</span>
                                        </td>
                                        <td>{formatBytes(volume.Size)}</td>
                                        <td>{fmt.Sprintf("%d", volume.FileCount)}</td>
                                        <td>
                                            <span class="badge bg-info">{volume.Replication}</span>
                                        </td>
                                        <td>
                                            <span class={fmt.Sprintf("badge bg-%s", getStatusColor(volume.Status))}>
                                                {volume.Status}
                                            </span>
                                        </td>
                                        <td>
                                            <div class="btn-group btn-group-sm">
                                                <button type="button" class="btn btn-outline-primary btn-sm" 
                                                        title="View Details">
                                                    <i class="fas fa-eye"></i>
                                                </button>
                                                <button type="button" class="btn btn-outline-secondary btn-sm" 
                                                        title="Compact">
                                                    <i class="fas fa-compress-alt"></i>
                                                </button>
                                                <button type="button" class="btn btn-outline-warning btn-sm" 
                                                        title="Fix">
                                                    <i class="fas fa-wrench"></i>
                                                </button>
                                            </div>
                                        </td>
                                    </tr>
                                }
                            </tbody>
                        </table>
                    </div>
                    
                    <!-- Volume Summary -->
                    <div class="d-flex justify-content-between align-items-center mt-3">
                        <div>
                            <small class="text-muted">
                                Showing {fmt.Sprintf("%d", (data.CurrentPage-1)*data.PageSize + 1)} to {fmt.Sprintf("%d", minInt(data.CurrentPage*data.PageSize, data.TotalVolumes))} of {fmt.Sprintf("%d", data.TotalVolumes)} volumes
                            </small>
                        </div>
                        if data.TotalPages > 1 {
                            <div>
                                <small class="text-muted">
                                    Page {fmt.Sprintf("%d", data.CurrentPage)} of {fmt.Sprintf("%d", data.TotalPages)}
                                </small>
                            </div>
                        }
                    </div>
                    
                    <!-- Pagination Controls -->
                    if data.TotalPages > 1 {
                        <div class="d-flex justify-content-center mt-3">
                            <nav aria-label="Volumes pagination">
                                <ul class="pagination pagination-sm mb-0">
                                    <!-- Previous Button -->
                                    if data.CurrentPage > 1 {
                                        <li class="page-item">
                                            <a class="page-link pagination-link" href="#" data-page={fmt.Sprintf("%d", data.CurrentPage-1)}>
                                                <i class="fas fa-chevron-left"></i>
                                            </a>
                                        </li>
                                    } else {
                                        <li class="page-item disabled">
                                            <span class="page-link">
                                                <i class="fas fa-chevron-left"></i>
                                            </span>
                                        </li>
                                    }
                                    
                                    <!-- Page Numbers -->
                                    for i := maxInt(1, data.CurrentPage-2); i <= minInt(data.TotalPages, data.CurrentPage+2); i++ {
                                        if i == data.CurrentPage {
                                            <li class="page-item active">
                                                <span class="page-link">{fmt.Sprintf("%d", i)}</span>
                                            </li>
                                        } else {
                                            <li class="page-item">
                                                <a class="page-link pagination-link" href="#" data-page={fmt.Sprintf("%d", i)}>{fmt.Sprintf("%d", i)}</a>
                                            </li>
                                        }
                                    }
                                    
                                    <!-- Next Button -->
                                    if data.CurrentPage < data.TotalPages {
                                        <li class="page-item">
                                            <a class="page-link pagination-link" href="#" data-page={fmt.Sprintf("%d", data.CurrentPage+1)}>
                                                <i class="fas fa-chevron-right"></i>
                                            </a>
                                        </li>
                                    } else {
                                        <li class="page-item disabled">
                                            <span class="page-link">
                                                <i class="fas fa-chevron-right"></i>
                                            </span>
                                        </li>
                                    }
                                </ul>
                            </nav>
                        </div>
                    }
                } else {
                    <div class="text-center py-5">
                        <i class="fas fa-database fa-3x text-muted mb-3"></i>
                        <h5 class="text-muted">No Volumes Found</h5>
                        <p class="text-muted">No volumes are currently available in the cluster.</p>
                    </div>
                }
            </div>
        </div>

        <!-- Last Updated -->
        <div class="row">
            <div class="col-12">
                <small class="text-muted">
                    <i class="fas fa-clock me-1"></i>
                    Last updated: {data.LastUpdated.Format("2006-01-02 15:04:05")}
                </small>
            </div>
        </div>
    </div>
    
    <!-- JavaScript for pagination and sorting -->
    <script>
        // Initialize pagination links when page loads
        document.addEventListener('DOMContentLoaded', function() {
            // Add click handlers to pagination links
            document.querySelectorAll('.pagination-link').forEach(link => {
                link.addEventListener('click', function(e) {
                    e.preventDefault();
                    const page = this.getAttribute('data-page');
                    goToPage(page);
                });
            });
        });
        
        function goToPage(page) {
            const url = new URL(window.location);
            url.searchParams.set('page', page);
            window.location.href = url.toString();
        }
        
        function changePageSize() {
            const pageSize = document.getElementById('pageSizeSelect').value;
            const url = new URL(window.location);
            url.searchParams.set('pageSize', pageSize);
            url.searchParams.set('page', '1'); // Reset to first page
            window.location.href = url.toString();
        }
        
        function sortTable(column) {
            const url = new URL(window.location);
            const currentSort = url.searchParams.get('sortBy');
            const currentOrder = url.searchParams.get('sortOrder') || 'asc';
            
            let newOrder = 'asc';
            if (currentSort === column && currentOrder === 'asc') {
                newOrder = 'desc';
            }
            
            url.searchParams.set('sortBy', column);
            url.searchParams.set('sortOrder', newOrder);
            url.searchParams.set('page', '1'); // Reset to first page
            window.location.href = url.toString();
        }
        
        function exportVolumes() {
            // TODO: Implement volume export functionality
            alert('Export functionality to be implemented');
        }
    </script>
}

func countActiveVolumes(volumes []dash.VolumeInfo) int {
    count := 0
    for _, volume := range volumes {
        if volume.Status == "active" {
            count++
        }
    }
    return count
}

func countUniqueDataCenters(volumes []dash.VolumeInfo) int {
    dcMap := make(map[string]bool)
    for _, volume := range volumes {
        dcMap[volume.DataCenter] = true
    }
    return len(dcMap)
}

templ getSortIcon(column, currentSort, currentOrder string) {
    if column != currentSort {
        <i class="fas fa-sort text-muted ms-1"></i>
    } else if currentOrder == "asc" {
        <i class="fas fa-sort-up text-primary ms-1"></i>
    } else {
        <i class="fas fa-sort-down text-primary ms-1"></i>
    }
}

func minInt(a, b int) int {
    if a < b {
        return a
    }
    return b
}

func maxInt(a, b int) int {
    if a > b {
        return a
    }
    return b
}