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using KnzwTech.AspNetCore.ResourceBasedLocalization;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Identity;
using T10a.Data;
using T10a.Models;

AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews(opt => opt.EnableDefaultErrorMessagesFromResource());

builder.Services.AddDbContext<T10aContext>(
    opt => opt.UseNpgsql(builder.Configuration.GetConnectionString(nameof(T10aContext))));

builder.Services.AddIdentity<BlogUser, IdentityRole>()
    .AddRoleManager<RoleManager<IdentityRole>>()
    .AddDefaultTokenProviders()
    .AddEntityFrameworkStores<T10aContext>();

builder.Services.ConfigureApplicationCookie(opt => {
    opt.LoginPath = "/Accounts/Login";
    opt.LogoutPath = "/Accounts/Logout";
    opt.AccessDeniedPath = "/Accounts/AccessDenied";
});

builder.Services.AddTransient<IdentityDataSeeder>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();

app.UseStatusCodePagesWithReExecute("/Home/AccessError/{0}");

app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

app.MapControllerRoute(                                     //
    name: "default",                                        // URLルーティングの定義
    pattern: "{controller=Articles}/{action=Index}/{id?}"); //

IdentityDataSeeder.SeedData(app);

app.Run();

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// GET: Articles
public async Task<IActionResult> Index(string? greeting) // ?greeting=xxx というクエリが来ることを想定
{
    BlogUser? currentUser = await _userManager.GetUserAsync(User);
    bool isAdminUser = await IsAdminUserAsync(currentUser);

    bool isLoggedIn = _signInManager.IsSignedIn(User) && currentUser != null;

    var articles = (from a in _context.Articles
                    where (a.PublicationState == PublicationStateType.Published
                    || (isLoggedIn && a.BlogUserId == currentUser!.Id)
                    || isAdminUser)
                    orderby a.Modified descending
                    select a).Include(a => a.BlogUser);

    ViewBag.CurrentUser = currentUser;
    ViewBag.IsAdminUser = isAdminUser;
    ViewBag.IsLoggedIn = isLoggedIn;

    ViewBag.Greeting = greeting; // ↑のクエリ文字列を ViewBag に入れる

    return View(await articles.ToListAsync());
}     

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@model IEnumerable<T10a.Models.Article>
 
@{
    ViewData["Title"] = "記事一覧";
 
    var currentUser = (BlogUser?)ViewBag.CurrentUser;
    var isAdminUser = (bool)ViewBag.IsAdminUser;
    var isLoggedIn = (bool)ViewBag.IsLoggedIn;
 
    if (Model is null) throw new ArgumentNullException(nameof(Model)); // ad-hoc! 非null保証のための回避策
}

<p>@ViewBag.Greeting</p> @* ←単に表示する *@
 
@foreach(var a in Model)
{    
    <section class="article">
        <h3><a asp-action="Details" asp-route-id="@a.ArticleId">@a.Title</a></h3>
 
        <p> @(a.BlogUser?.Nickname ?? a.BlogUser?.UserName) による投稿</p>
 
        <pre>@a.Body</pre>
 
        @if (isLoggedIn && (isAdminUser || (currentUser != null && a.BlogUserId == currentUser.Id)))
        {
            <p>@Html.DisplayNameFor(_ => a.PublicationState)：@Html.DisplayFor(_ => a.PublicationState)</p>
 
            <p>
                 <a asp-action="Edit" asp-route-id="@a.ArticleId">編集</a>
               | <a asp-action="Delete" asp-route-id="@a.ArticleId">削除</a>
            </p>
        }
    </section>
}
 
@if (isLoggedIn)
{
    <a asp-action="Create">新規作成</a>
}

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// GET: Articles
public async Task<IActionResult> Index(string? author) // ?author=xxx というクエリが来ることを想定
{
    BlogUser? currentUser = await _userManager.GetUserAsync(User);
    bool isAdminUser = await IsAdminUserAsync(currentUser);

    bool isLoggedIn = _signInManager.IsSignedIn(User) && currentUser != null;

    var articles = (from a in _context.Articles
                    where (a.PublicationState == PublicationStateType.Published
                    || (isLoggedIn && a.BlogUserId == currentUser!.Id)
                    || isAdminUser)
                    && (author == null || a.BlogUser!.UserName == author) // 記事の著者が author で指定したものかどうか
                    orderby a.Modified descending
                    select a).Include(a => a.BlogUser);

    ViewBag.CurrentUser = currentUser;
    ViewBag.IsAdminUser = isAdminUser;
    ViewBag.IsLoggedIn = isLoggedIn;

    ViewBag.Greeting = greeting; // ←削除

    return View(await articles.ToListAsync());
}

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@model IEnumerable<T10a.Models.Article>
 
@{
    ViewData["Title"] = "記事一覧";
 
    var currentUser = (BlogUser?)ViewBag.CurrentUser;
    var isAdminUser = (bool)ViewBag.IsAdminUser;
    var isLoggedIn = (bool)ViewBag.IsLoggedIn;
 
    if (Model is null) throw new ArgumentNullException(nameof(Model)); // ad-hoc! 非null保証のための回避策
}

<p>@ViewBag.Greeting</p> @* ←削除 *@
 
@foreach(var a in Model)
{    
    <section class="article">
        <h3><a asp-action="Details" asp-route-id="@a.ArticleId">@a.Title</a></h3>

        @* ↓ユーザー名に ?author=xxx のリンクを張る *@
        <p><a asp-action="Index" asp-route-author="@a.BlogUser?.UserName">@(a.BlogUser?.Nickname ?? a.BlogUser?.UserName)</a> による投稿</p> 
 
        <pre>@a.Body</pre>
 
        @if (isLoggedIn && (isAdminUser || (currentUser != null && a.BlogUserId == currentUser.Id)))
        {
            <p>@Html.DisplayNameFor(_ => a.PublicationState)：@Html.DisplayFor(_ => a.PublicationState)</p>
 
            <p>
                 <a asp-action="Edit" asp-route-id="@a.ArticleId">編集</a>
               | <a asp-action="Delete" asp-route-id="@a.ArticleId">削除</a>
            </p>
        }
    </section>
}
 
@if (isLoggedIn)
{
    <a asp-action="Create">新規作成</a>
}