package app

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

templ ClusterEcShards(data dash.ClusterEcShardsData) {
    <div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
        <div>
            <h1 class="h2">
                <i class="fas fa-th-large me-2"></i>EC Shards
            </h1>
            if data.FilterCollection != "" {
                <div class="d-flex align-items-center mt-2">
                    if data.FilterCollection == "default" {
                        <span class="badge bg-secondary text-white me-2">
                            <i class="fas fa-filter me-1"></i>Collection: default
                        </span>
                    } else {
                        <span class="badge bg-info text-white me-2">
                            <i class="fas fa-filter me-1"></i>Collection: {data.FilterCollection}
                        </span>
                    }
                    <a href="/cluster/ec-shards" class="btn btn-sm btn-outline-secondary">
                        <i class="fas fa-times me-1"></i>Clear Filter
                    </a>
                </div>
            }
        </div>
        <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="exportEcShards()">
                    <i class="fas fa-download me-1"></i>Export
                </button>
            </div>
        </div>
    </div>

    <!-- Statistics Cards -->
    <div class="row mb-4">
        <div class="col-md-3">
            <div class="card text-bg-primary">
                <div class="card-body">
                    <div class="d-flex justify-content-between">
                        <div>
                            <h6 class="card-title">Total Shards</h6>
                            <h4 class="mb-0">{fmt.Sprintf("%d", data.TotalShards)}</h4>
                        </div>
                        <div class="align-self-center">
                            <i class="fas fa-puzzle-piece fa-2x"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card text-bg-info">
                <div class="card-body">
                    <div class="d-flex justify-content-between">
                        <div>
                            <h6 class="card-title">EC Volumes</h6>
                            <h4 class="mb-0">{fmt.Sprintf("%d", data.TotalVolumes)}</h4>
                        </div>
                        <div class="align-self-center">
                            <i class="fas fa-database fa-2x"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card text-bg-success">
                <div class="card-body">
                    <div class="d-flex justify-content-between">
                        <div>
                            <h6 class="card-title">Healthy Volumes</h6>
                            <h4 class="mb-0">{fmt.Sprintf("%d", data.VolumesWithAllShards)}</h4>
                            <small>Complete (14/14 shards)</small>
                        </div>
                        <div class="align-self-center">
                            <i class="fas fa-check-circle fa-2x"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card text-bg-warning">
                <div class="card-body">
                    <div class="d-flex justify-content-between">
                        <div>
                            <h6 class="card-title">Degraded Volumes</h6>
                            <h4 class="mb-0">{fmt.Sprintf("%d", data.VolumesWithMissingShards)}</h4>
                            <small>Incomplete/Critical</small>
                        </div>
                        <div class="align-self-center">
                            <i class="fas fa-exclamation-triangle fa-2x"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Shards Table -->
    <div class="table-responsive">
        <table class="table table-striped table-hover" id="ecShardsTable">
            <thead>
                <tr>
                    <th>
                        <a href="#" onclick="sortBy('volume_id')" class="text-dark text-decoration-none">
                            Volume ID
                            if data.SortBy == "volume_id" {
                                if data.SortOrder == "asc" {
                                    <i class="fas fa-sort-up ms-1"></i>
                                } else {
                                    <i class="fas fa-sort-down ms-1"></i>
                                }
                            } else {
                                <i class="fas fa-sort ms-1 text-muted"></i>
                            }
                        </a>
                    </th>

                    if data.ShowCollectionColumn {
                        <th>
                            <a href="#" onclick="sortBy('collection')" class="text-dark text-decoration-none">
                                Collection
                                if data.SortBy == "collection" {
                                    if data.SortOrder == "asc" {
                                        <i class="fas fa-sort-up ms-1"></i>
                                    } else {
                                        <i class="fas fa-sort-down ms-1"></i>
                                    }
                                } else {
                                    <i class="fas fa-sort ms-1 text-muted"></i>
                                }
                            </a>
                        </th>
                    }
                    <th>
                        <a href="#" onclick="sortBy('server')" class="text-dark text-decoration-none">
                            Server
                            if data.SortBy == "server" {
                                if data.SortOrder == "asc" {
                                    <i class="fas fa-sort-up ms-1"></i>
                                } else {
                                    <i class="fas fa-sort-down ms-1"></i>
                                }
                            } else {
                                <i class="fas fa-sort ms-1 text-muted"></i>
                            }
                        </a>
                    </th>
                    if data.ShowDataCenterColumn {
                        <th>
                            <a href="#" onclick="sortBy('datacenter')" class="text-dark text-decoration-none">
                                Data Center
                                if data.SortBy == "datacenter" {
                                    if data.SortOrder == "asc" {
                                        <i class="fas fa-sort-up ms-1"></i>
                                    } else {
                                        <i class="fas fa-sort-down ms-1"></i>
                                    }
                                } else {
                                    <i class="fas fa-sort ms-1 text-muted"></i>
                                }
                            </a>
                        </th>
                    }
                    if data.ShowRackColumn {
                        <th>
                            <a href="#" onclick="sortBy('rack')" class="text-dark text-decoration-none">
                                Rack
                                if data.SortBy == "rack" {
                                    if data.SortOrder == "asc" {
                                        <i class="fas fa-sort-up ms-1"></i>
                                    } else {
                                        <i class="fas fa-sort-down ms-1"></i>
                                    }
                                } else {
                                    <i class="fas fa-sort ms-1 text-muted"></i>
                                }
                            </a>
                        </th>
                    }
                    <th class="text-dark">Distribution</th>
                    <th class="text-dark">Status</th>
                    <th class="text-dark">Actions</th>
                </tr>
            </thead>
            <tbody>
                for _, shard := range data.EcShards {
                    <tr>
                        <td>
                            <span class="fw-bold">{fmt.Sprintf("%d", shard.VolumeID)}</span>
                        </td>
                        if data.ShowCollectionColumn {
                            <td>
                                if shard.Collection != "" {
                                    <a href="/cluster/ec-shards?collection={shard.Collection}" class="text-decoration-none">
                                        <span class="badge bg-info text-white">{shard.Collection}</span>
                                    </a>
                                } else {
                                    <a href="/cluster/ec-shards?collection=default" class="text-decoration-none">
                                        <span class="badge bg-secondary text-white">default</span>
                                    </a>
                                }
                            </td>
                        }
                        <td>
                            <code class="small">{shard.Server}</code>
                        </td>
                        if data.ShowDataCenterColumn {
                            <td>
                                <span class="badge bg-outline-primary">{shard.DataCenter}</span>
                            </td>
                        }
                        if data.ShowRackColumn {
                            <td>
                                <span class="badge bg-outline-secondary">{shard.Rack}</span>
                            </td>
                        }
                        <td>
                            @displayShardDistribution(shard, data.EcShards)
                        </td>
                        <td>
                            @displayVolumeStatus(shard)
                        </td>
                        <td>
                            <div class="btn-group" role="group">
                                <button type="button" class="btn btn-sm btn-outline-primary" 
                                        onclick="showShardDetails(event)" 
                                        data-volume-id={ fmt.Sprintf("%d", shard.VolumeID) }
                                        title="View EC volume details">
                                    <i class="fas fa-info-circle"></i>
                                </button>
                                if !shard.IsComplete {
                                    <button type="button" class="btn btn-sm btn-outline-warning" 
                                            onclick="repairVolume(event)" 
                                            data-volume-id={ fmt.Sprintf("%d", shard.VolumeID) }
                                            title="Repair missing shards">
                                        <i class="fas fa-wrench"></i>
                                    </button>
                                }
                            </div>
                        </td>
                    </tr>
                }
            </tbody>
        </table>
    </div>

    <!-- Pagination -->
    if data.TotalPages > 1 {
        <nav aria-label="EC Shards pagination">
            <ul class="pagination justify-content-center">
                if data.CurrentPage > 1 {
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(event)" data-page={ fmt.Sprintf("%d", data.CurrentPage-1) }>
                            <i class="fas fa-chevron-left"></i>
                        </a>
                    </li>
                }
                
                <!-- First page -->
                if data.CurrentPage > 3 {
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(1)">1</a>
                    </li>
                    if data.CurrentPage > 4 {
                        <li class="page-item disabled">
                            <span class="page-link">...</span>
                        </li>
                    }
                }
                
                <!-- Current page and neighbors -->
                if data.CurrentPage > 1 && data.CurrentPage-1 >= 1 {
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(event)" data-page={ fmt.Sprintf("%d", data.CurrentPage-1) }>{fmt.Sprintf("%d", data.CurrentPage-1)}</a>
                    </li>
                }
                
                <li class="page-item active">
                    <span class="page-link">{fmt.Sprintf("%d", data.CurrentPage)}</span>
                </li>
                
                if data.CurrentPage < data.TotalPages && data.CurrentPage+1 <= data.TotalPages {
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(event)" data-page={ fmt.Sprintf("%d", data.CurrentPage+1) }>{fmt.Sprintf("%d", data.CurrentPage+1)}</a>
                    </li>
                }
                
                <!-- Last page -->
                if data.CurrentPage < data.TotalPages-2 {
                    if data.CurrentPage < data.TotalPages-3 {
                        <li class="page-item disabled">
                            <span class="page-link">...</span>
                        </li>
                    }
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(event)" data-page={ fmt.Sprintf("%d", data.TotalPages) }>{fmt.Sprintf("%d", data.TotalPages)}</a>
                    </li>
                }
                
                if data.CurrentPage < data.TotalPages {
                    <li class="page-item">
                        <a class="page-link" href="#" onclick="goToPage(event)" data-page={ fmt.Sprintf("%d", data.CurrentPage+1) }>
                            <i class="fas fa-chevron-right"></i>
                        </a>
                    </li>
                }
            </ul>
        </nav>
    }


    <!-- JavaScript -->
    <script>
        function sortBy(field) {
            const currentSort = "{data.SortBy}";
            const currentOrder = "{data.SortOrder}";
            let newOrder = 'asc';
            
            if (currentSort === field && currentOrder === 'asc') {
                newOrder = 'desc';
            }
            
            updateUrl({
                sortBy: field,
                sortOrder: newOrder,
                page: 1
            });
        }

        function goToPage(event) {
            // Get data from the link element (not any child elements)
            const link = event.target.closest('a');
            const page = link.getAttribute('data-page');
            updateUrl({ page: page });
        }

        function changePageSize() {
            const pageSize = document.getElementById('pageSizeSelect').value;
            updateUrl({ pageSize: pageSize, page: 1 });
        }

        function updateUrl(params) {
            const url = new URL(window.location);
            Object.keys(params).forEach(key => {
                if (params[key]) {
                    url.searchParams.set(key, params[key]);
                } else {
                    url.searchParams.delete(key);
                }
            });
            window.location.href = url.toString();
        }

        function exportEcShards() {
            const url = new URL('/api/cluster/ec-shards/export', window.location.origin);
            const params = new URLSearchParams(window.location.search);
            params.forEach((value, key) => {
                url.searchParams.set(key, value);
            });
            window.open(url.toString(), '_blank');
        }

        function showShardDetails(event) {
            // Get data from the button element (not the icon inside it)
            const button = event.target.closest('button');
            const volumeId = button.getAttribute('data-volume-id');
            
            // Navigate to the EC volume details page
            window.location.href = `/cluster/ec-volumes/${volumeId}`;
        }

        function repairVolume(event) {
            // Get data from the button element (not the icon inside it)
            const button = event.target.closest('button');
            const volumeId = button.getAttribute('data-volume-id');
            if (confirm(`Are you sure you want to repair missing shards for volume ${volumeId}?`)) {
                fetch(`/api/cluster/volumes/${volumeId}/repair`, {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    }
                })
                .then(response => response.json())
                .then(data => {
                    if (data.success) {
                        alert('Repair initiated successfully');
                        location.reload();
                    } else {
                        alert('Failed to initiate repair: ' + data.error);
                    }
                })
                .catch(error => {
                    alert('Error: ' + error.message);
                });
            }
        }
    </script>
}

// displayShardDistribution shows the distribution summary for a volume's shards
templ displayShardDistribution(shard dash.EcShardWithInfo, allShards []dash.EcShardWithInfo) {
    <div class="small">
        <i class="fas fa-sitemap me-1"></i>
        { calculateDistributionSummary(shard.VolumeID, allShards) }
    </div>
}

// displayVolumeStatus shows an improved status display
templ displayVolumeStatus(shard dash.EcShardWithInfo) {
    if shard.IsComplete {
        <span class="badge bg-success"><i class="fas fa-check me-1"></i>Complete</span>
    } else {
        if len(shard.MissingShards) > 10 {
            <span class="badge bg-danger"><i class="fas fa-skull me-1"></i>Critical ({fmt.Sprintf("%d", len(shard.MissingShards))} missing)</span>
        } else if len(shard.MissingShards) > 6 {
            <span class="badge bg-warning"><i class="fas fa-exclamation-triangle me-1"></i>Degraded ({fmt.Sprintf("%d", len(shard.MissingShards))} missing)</span>
        } else if len(shard.MissingShards) > 2 {
            <span class="badge bg-warning"><i class="fas fa-info-circle me-1"></i>Incomplete ({fmt.Sprintf("%d", len(shard.MissingShards))} missing)</span>
        } else {
            <span class="badge bg-info"><i class="fas fa-info-circle me-1"></i>Minor Issues ({fmt.Sprintf("%d", len(shard.MissingShards))} missing)</span>
        }
    }
}

// calculateDistributionSummary calculates and formats the distribution summary
func calculateDistributionSummary(volumeID uint32, allShards []dash.EcShardWithInfo) string {
    dataCenters := make(map[string]bool)
    racks := make(map[string]bool)
    servers := make(map[string]bool)
    
    for _, s := range allShards {
        if s.VolumeID == volumeID {
            dataCenters[s.DataCenter] = true
            racks[s.Rack] = true
            servers[s.Server] = true
        }
    }
    
    return fmt.Sprintf("%d DCs, %d racks, %d servers", len(dataCenters), len(racks), len(servers))
}