@page "/projects/{Id:int}/results"
@inject ProjectService ProjectService
@inject CutListPackingService PackingService
@inject ReportService ReportService
@inject NavigationManager Navigation
@inject IJSRuntime JS
@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>
            <p class="text-muted mb-0">Optimization Results</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.StockBins.Count == 0)
                {
                    <li>No stock bins defined. <a href="projects/@Id">Add stock bins 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 (packResult.ItemsNotUsed.Count > 0)
        {
            <div class="alert alert-warning">
                <h5>Items Not Placed</h5>
                <p>The following @packResult.ItemsNotUsed.Count item(s) could not be placed (probably too long for available stock):</p>
                <ul class="mb-0">
                    @foreach (var item in packResult.ItemsNotUsed.GroupBy(i => new { i.Name, i.Length }))
                    {
                        <li>@item.Count() x @item.Key.Name (@ArchUnits.FormatFromInches(item.Key.Length))</li>
                    }
                </ul>
            </div>
        }

        <!-- 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!.TotalBins</h2>
                        <p class="card-text text-muted">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>

        <!-- Report -->
        <CutListReport Project="project" PackResult="packResult" />
    }
}

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

    private Project? project;
    private PackResult? packResult;
    private PackingSummary? summary;
    private bool loading = true;

    private bool CanOptimize => project != null &&
                                project.Parts.Count > 0 &&
                                project.StockBins.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 = PackingService.Pack(project.Parts, project.StockBins, kerf);
            summary = PackingService.GetSummary(packResult);
        }

        loading = false;
    }

    private async Task PrintReport()
    {
        await JS.InvokeVoidAsync("window.print");
    }
}