@using Microsoft.AspNetCore.Components.Forms
@using System.IdentityModel.Tokens.Jwt
@using Blazorade.Id.Model
@using Blazorade.Id.Services

@inject ITokenService tokenService

<PageTitle>Acquire Tokens</PageTitle>
<h1>Acquire Tokens</h1>

<div>
    <label for="scopes">Scopes</label>
</div>
<InputTextArea DisplayName="Scopes" id="scopes" @bind-Value="this.Scopes" style="width: 320px; height: 48px"/>
<div style="margin-top: 1em">
    <button @onclick="async () => await this.GetTokensAsync()">Get Tokens</button>
</div>

@if(this.AccessTokens.Count > 0 || null != this.IdToken)
{
    <h2>Tokens</h2>
    @if(this.AccessTokens.Count > 0)
    {
        <h3>Access Tokens</h3>
        @foreach(var item in this.AccessTokens)
        {
            <h4>Resource: @item.Key</h4>
            <p>
                <a href="https://jwt.ms/#access_token=@item.Value.RawData" target="_blank">@item.Value.RawData</a>
            </p>
        }
    }

    @if(null != this.IdToken)
    {
        <h3>Identity Token</h3>
        <p>
            <a href="https://jwt.ms/#id_token=@this.IdToken.RawData" target="_blank">@this.IdToken.RawData</a>
        </p>
    }
}

@code {
    private const string DefaultScopes = "openid profile email User.Read";
    private string? Scopes;
    private AccessTokenDictionary AccessTokens = new AccessTokenDictionary();
    private JwtSecurityToken? IdToken = null;

    protected async override Task OnAfterRenderAsync(bool firstRender)
    {
        await base.OnAfterRenderAsync(firstRender);
        if(firstRender)
        {
            this.Scopes = DefaultScopes;
            await this.GetTokensAsync(Prompt.None);
            this.StateHasChanged();
        }
    }

    private async Task GetTokensAsync(Prompt? prompt = null)
    {
        this.AccessTokens.Clear();
        this.IdToken = null;

        var scp = this.Scopes ?? DefaultScopes;
        var scpArr = scp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

        var getOptions = new GetTokenOptions
            {
                Prompt = prompt,
                Scopes = scpArr,
            };

        this.AccessTokens = await this.tokenService.GetAccessTokensAsync(getOptions);

        // No need to prompt when getting ID token, since any prompting
        // was done when getting access tokens.
        getOptions.Prompt = Prompt.None;
        this.IdToken = await this.tokenService.GetIdentityTokenAsync(getOptions);
    }
}