@page "/Login"
@using System.Text.Json
@using System.Text.Json.Serialization
@using LibMatrix
@inject ILocalStorageService LocalStorage
@inject IJSRuntime JsRuntime
<h3>Login</h3>
<hr/>

<span style="display: block;">
    <label>User ID:</label>
    <span>@@</span><!--
    --><FancyTextBox @bind-Value="@newRecordInput.Username"></FancyTextBox><!--
    --><span>:</span><!--
    --><FancyTextBox @bind-Value="@newRecordInput.Homeserver"></FancyTextBox>
</span>
<span style="display: block;">
    <label>Password:</label>
    <FancyTextBox @bind-Value="@newRecordInput.Password" IsPassword="true"></FancyTextBox>
</span>
<span style="display: block">
    <label>Proxy (<a href="https://cgit.rory.gay/matrix/MxApiExtensions.git">MxApiExtensions</a> or similar):</label>
    <FancyTextBox @bind-Value="@newRecordInput.Proxy"></FancyTextBox>
</span>
<br/>
<LinkButton OnClick="@AddRecord">Add account to queue</LinkButton>
<LinkButton OnClick="@(() => Login(newRecordInput))">Log in</LinkButton>
<br/>
<br/>

<h4>Import from TSV</h4>
<hr/>
<span>Import credentials from a TSV (Tab Separated Values) file</span><br/>
<span>Columns: username, homeserver, password, proxy</span><br/>
<span>Keep in mind there is no column header!</span><br/>
<br/>
<InputFile OnChange="@FileChanged" accept=".tsv"></InputFile>
<br/>
<br/>

<table border="1">
    <thead style="border-bottom: 1px solid white;">
        <th style="min-width: 150px; text-align: center; border-right: 1px solid white;">Username</th>
        <th style="min-width: 150px; text-align: center; border-right: 1px solid white;">Homeserver</th>
        <th style="min-width: 150px; text-align: center; border-right: 1px solid white;">Password</th>
        <th style="min-width: 150px; text-align: center; border-right: 1px solid white;">Proxy</th>
        <th style="min-width: 150px; text-align: center;">Actions</th>
    </thead>
    @foreach (var record in records) {
        var r = record;
        <tr style="background-color: @(LoggedInSessions.Any(x => x.UserId == $"@{r.Username}:{r.Homeserver}" && x.Proxy == r.Proxy) ? "green" : "unset")">
            <td style="border-width: 1px;">
                <FancyTextBox @bind-Value="@r.Username"></FancyTextBox>
            </td>
            <td style="border-width: 1px;">
                <FancyTextBox @bind-Value="@r.Homeserver"></FancyTextBox>
            </td>
            <td style="border-width: 1px;">
                <FancyTextBox @bind-Value="@r.Password" IsPassword="true"></FancyTextBox>
            </td>
            <td style="border-width: 1px;">
                <FancyTextBox @bind-Value="@r.Proxy"></FancyTextBox>
            </td>
            <td style="border-width: 1px;">
                <a role="button" @onclick="() => records.Remove(r)">Remove</a>
            </td>
        </tr>
        @if (r.Exception is MatrixException me) {
            <tr>
                <td style="border-width: 1px;">Exception:</td>
                <td style="border-width: 1px;">@me.ErrorCode</td>
                <td style="border-width: 1px;" colspan="3">@me.Error</td>
            </tr>
        }
        else if (r.Exception is { } e) {
            <tr>
                <td style="border-width: 1px;">Exception:</td>
                <td style="border-width: 1px;" colspan="4">@e.Message</td>
            </tr>
        }
    }
</table>
<br/>
<LinkButton OnClick="@LoginAll">Log in</LinkButton>


@code {
    readonly List<LoginStruct> records = new();
    private LoginStruct newRecordInput = new();

    List<UserAuth>? LoggedInSessions { get; set; } = new();

    async Task LoginAll() {
        var loginTasks = records.Select(Login);
        await Task.WhenAll(loginTasks);
    }

    async Task Login(LoginStruct record) {
        if (!records.Contains(record)) 
            records.Add(record);
        if (LoggedInSessions.Any(x => x.UserId == $"@{record.Username}:{record.Homeserver}" && x.Proxy == record.Proxy)) return;
        StateHasChanged();
        try {
            var result = new UserAuth(await hsProvider.Login(record.Homeserver, record.Username, record.Password, record.Proxy)) {
                Proxy = record.Proxy
            };
            if (result == null) {
                Console.WriteLine($"Failed to login to {record.Homeserver} as {record.Username}!");
                return;
            }

            Console.WriteLine($"Obtained access token for {result.UserId}!");

            await RMUStorage.AddToken(result);
            LoggedInSessions = await RMUStorage.GetAllTokens();
        }
        catch (Exception e) {
            Console.WriteLine($"Failed to login to {record.Homeserver} as {record.Username}!");
            Console.WriteLine(e);
            record.Exception = e;
        }

        StateHasChanged();
    }

    private async Task FileChanged(InputFileChangeEventArgs obj) {
        LoggedInSessions = await RMUStorage.GetAllTokens();
        Console.WriteLine(JsonSerializer.Serialize(obj, new JsonSerializerOptions {
            WriteIndented = true
        }));
        await using var rs = obj.File.OpenReadStream();
        using var sr = new StreamReader(rs);
        var tsvData = await sr.ReadToEndAsync();
        records.Clear();
        foreach (var line in tsvData.Split('\n')) {
            string?[] parts = line.Split('\t');
            if (parts.Length < 3)
                continue;
            string? via = parts.Length > 3 ? parts[3] : null;
            records.Add(new() { Homeserver = parts[0], Username = parts[1], Password = parts[2], Proxy = via });
        }
    }

    private async Task AddRecord() {
        LoggedInSessions = await RMUStorage.GetAllTokens();
        records.Add(newRecordInput);
        newRecordInput = new();
    }

    private class LoginStruct {
        public string? Homeserver { get; set; } = "";
        public string? Username { get; set; } = "";
        public string? Password { get; set; } = "";
        public string? Proxy { get; set; }
        
        [JsonIgnore]
        internal Exception? Exception { get; set; }
    }

}