@page "/projects/{Id:int}/results"
@inject ProjectService ProjectService
@inject CutListPackingService PackingService
@inject NavigationManager Navigation
@inject IJSRuntime JS
@using CutList.Core
@using CutList.Core.Nesting
@using CutList.Core.Formatting

<PageTitle>Results - @(project?.Name ?? "Project")</PageTitle>

@if (loading)
{
    <p><em>Loading...</em></p>
}
else if (project == null)
{
    <div class="alert alert-danger">Project not found.</div>
}
else
{
    <div class="d-flex justify-content-between align-items-center mb-3">
        <div>
            <h1>@project.Name</h1>
            @if (!string.IsNullOrWhiteSpace(project.Customer))
            {
                <p class="text-muted mb-0">Customer: @project.Customer</p>
            }
        </div>
        <div>
            <a href="projects/@Id" class="btn btn-outline-secondary me-2">Edit Project</a>
            <button class="btn btn-primary" @onclick="PrintReport">Print Report</button>
        </div>
    </div>

    @if (!CanOptimize)
    {
        <div class="alert alert-warning">
            <h4>Cannot Optimize</h4>
            <ul class="mb-0">
                @if (project.Parts.Count == 0)
                {
                    <li>No parts defined. <a href="projects/@Id">Add parts to the project</a>.</li>
                }
                @if (project.CuttingToolId == null)
                {
                    <li>No cutting tool selected. <a href="projects/@Id">Select a cutting tool</a>.</li>
                }
            </ul>
        </div>
    }
    else if (packResult != null)
    {
        @if (summary!.TotalItemsNotPlaced > 0)
        {
            <div class="alert alert-warning">
                <h5>Items Not Placed</h5>
                <p>Some items could not be placed. This usually means no stock lengths are configured for the material, or parts are too long.</p>
            </div>
        }

        <!-- Overall Summary Cards -->
        <div class="row mb-4">
            <div class="col-md-3 col-6 mb-3">
                <div class="card text-center">
                    <div class="card-body">
                        <h2 class="card-title mb-0">@(summary.TotalInStockBins + summary.TotalToBePurchasedBins)</h2>
                        <p class="card-text text-muted">Total Stock Bars</p>
                    </div>
                </div>
            </div>
            <div class="col-md-3 col-6 mb-3">
                <div class="card text-center">
                    <div class="card-body">
                        <h2 class="card-title mb-0">@summary.TotalPieces</h2>
                        <p class="card-text text-muted">Total Pieces</p>
                    </div>
                </div>
            </div>
            <div class="col-md-3 col-6 mb-3">
                <div class="card text-center">
                    <div class="card-body">
                        <h2 class="card-title mb-0">@ArchUnits.FormatFromInches(summary.TotalWaste)</h2>
                        <p class="card-text text-muted">Total Waste</p>
                    </div>
                </div>
            </div>
            <div class="col-md-3 col-6 mb-3">
                <div class="card text-center">
                    <div class="card-body">
                        <h2 class="card-title mb-0">@summary.Efficiency.ToString("F1")%</h2>
                        <p class="card-text text-muted">Efficiency</p>
                    </div>
                </div>
            </div>
        </div>

        <!-- Stock Summary -->
        <div class="row mb-4">
            <div class="col-md-6 mb-3">
                <div class="card border-success">
                    <div class="card-header bg-success text-white">
                        <h5 class="mb-0">In Stock</h5>
                    </div>
                    <div class="card-body">
                        <h3>@summary.TotalInStockBins bars</h3>
                        <p class="text-muted mb-0">Ready to cut from existing inventory</p>
                    </div>
                </div>
            </div>
            <div class="col-md-6 mb-3">
                <div class="card border-warning">
                    <div class="card-header bg-warning">
                        <h5 class="mb-0">To Be Purchased</h5>
                    </div>
                    <div class="card-body">
                        <h3>@summary.TotalToBePurchasedBins bars</h3>
                        <p class="text-muted mb-0">Need to order from supplier</p>
                    </div>
                </div>
            </div>
        </div>

        <!-- Results by Material -->
        @foreach (var materialResult in packResult.MaterialResults)
        {
            var materialSummary = summary.MaterialSummaries.First(s => s.Material.Id == materialResult.Material.Id);

            <div class="card mb-4">
                <div class="card-header">
                    <h4 class="mb-0">@materialResult.Material.DisplayName</h4>
                </div>
                <div class="card-body">
                    <!-- Material Summary -->
                    <div class="row mb-3">
                        <div class="col-md-2 col-4">
                            <strong>@(materialSummary.InStockBins + materialSummary.ToBePurchasedBins)</strong> bars
                        </div>
                        <div class="col-md-2 col-4">
                            <strong>@materialSummary.TotalPieces</strong> pieces
                        </div>
                        <div class="col-md-2 col-4">
                            <strong>@materialSummary.Efficiency.ToString("F1")%</strong> efficiency
                        </div>
                        <div class="col-md-3 col-6">
                            <span class="text-success">@materialSummary.InStockBins in stock</span>
                        </div>
                        <div class="col-md-3 col-6">
                            <span class="text-warning">@materialSummary.ToBePurchasedBins to purchase</span>
                        </div>
                    </div>

                    @if (materialResult.PackResult.ItemsNotUsed.Count > 0)
                    {
                        <div class="alert alert-danger">
                            <strong>@materialResult.PackResult.ItemsNotUsed.Count items not placed</strong> -
                            No stock lengths available or parts too long.
                        </div>
                    }

                    @if (materialResult.InStockBins.Count > 0)
                    {
                        <h5 class="text-success mt-3">In Stock (@materialResult.InStockBins.Count bars)</h5>
                        @RenderBinList(materialResult.InStockBins)
                    }

                    @if (materialResult.ToBePurchasedBins.Count > 0)
                    {
                        <h5 class="text-warning mt-3">To Be Purchased (@materialResult.ToBePurchasedBins.Count bars)</h5>
                        @RenderBinList(materialResult.ToBePurchasedBins)

                        <!-- Purchase Summary -->
                        <div class="mt-3 p-3 bg-light rounded">
                            <strong>Order Summary:</strong>
                            <ul class="mb-0 mt-2">
                                @foreach (var group in materialResult.ToBePurchasedBins.GroupBy(b => b.Length).OrderByDescending(g => g.Key))
                                {
                                    <li>@group.Count() x @ArchUnits.FormatFromInches(group.Key)</li>
                                }
                            </ul>
                        </div>
                    }
                </div>
            </div>
        }
    }
}

@code {
    [Parameter]
    public int Id { get; set; }

    private Project? project;
    private MultiMaterialPackResult? packResult;
    private MultiMaterialPackingSummary? summary;
    private bool loading = true;

    private bool CanOptimize => project != null &&
                                project.Parts.Count > 0 &&
                                project.CuttingToolId != null;

    protected override async Task OnInitializedAsync()
    {
        project = await ProjectService.GetByIdAsync(Id);

        if (project != null && CanOptimize)
        {
            var kerf = project.CuttingTool?.KerfInches ?? 0.125m;
            packResult = await PackingService.PackAsync(project.Parts, kerf);
            summary = PackingService.GetSummary(packResult);
        }

        loading = false;
    }

    private RenderFragment RenderBinList(List<Bin> bins) => __builder =>
    {
        <div class="table-responsive">
            <table class="table table-sm table-striped">
                <thead>
                    <tr>
                        <th style="width: 80px;">#</th>
                        <th>Stock Length</th>
                        <th>Cuts</th>
                        <th>Waste</th>
                    </tr>
                </thead>
                <tbody>
                    @{ var binNumber = 1; }
                    @foreach (var bin in bins)
                    {
                        <tr>
                            <td>@binNumber</td>
                            <td>@ArchUnits.FormatFromInches(bin.Length)</td>
                            <td>
                                @foreach (var item in bin.Items)
                                {
                                    <span class="badge bg-primary me-1">
                                        @(string.IsNullOrWhiteSpace(item.Name) ? ArchUnits.FormatFromInches(item.Length) : $"{item.Name} ({ArchUnits.FormatFromInches(item.Length)})")
                                    </span>
                                }
                            </td>
                            <td>@ArchUnits.FormatFromInches(bin.RemainingLength)</td>
                        </tr>
                        binNumber++;
                    }
                </tbody>
            </table>
        </div>
    };

    private async Task PrintReport()
    {
        var filename = $"CutList - {project!.Name} - {DateTime.Now:yyyy-MM-dd}";
        await JS.InvokeVoidAsync("printWithTitle", filename);
    }
}