@page "/login"
@inject AuthService Auth
@inject NetworkStatusService NetworkStatus
@inject NavigationManager Navigation
@implements IDisposable

<PageTitle>Login - Chrono CCG</PageTitle>

<div class="container py-5" style="max-width: 500px;">
    <div class="card bg-dark text-white border-secondary shadow">
        <div class="card-header border-secondary text-center py-3">
            <h4 class="mb-0 fw-bold">
                <i class="bi bi-shield-lock-fill text-warning me-2"></i> Chrono API Account
            </h4>
        </div>
        <div class="card-body p-4">
            @if (!NetworkStatus.IsOnline)
            {
                <div class="alert alert-warning d-flex align-items-center mb-0" role="alert">
                    <i class="bi bi-wifi-off fs-3 me-3"></i>
                    <div>
                        <h6 class="alert-heading fw-bold mb-1">Offline Mode</h6>
                        <p class="small mb-0">Login is only available when you are online. Please check your network
                            connection to access the Chrono CCG API and sync notes.</p>
                    </div>
                </div>
            }
            else if (Auth.IsLoggedIn)
            {
                <div class="text-center py-3">
                    <div class="mb-3">
                        <i class="bi bi-person-check-fill text-success" style="font-size: 3rem;"></i>
                    </div>
                    <h5 class="fw-bold mb-1">Logged In</h5>
                    <p class="text-secondary small mb-4">
                        You are signed in as <span
                            class="text-warning fw-bold font-monospace">@Auth.CurrentUsername</span>. Your private card
                        notes and decks are active.
                    </p>
                    <div class="d-grid gap-2">
                        <a href="" class="btn btn-warning fw-semibold">
                            <i class="bi bi-collection-fill me-1"></i> Browse Cards
                        </a>
                        <button class="btn btn-outline-danger" @onclick="HandleLogout">
                            <i class="bi bi-box-arrow-right me-1"></i> Log Out
                        </button>
                    </div>
                </div>
            }
            else
            {
                @if (!string.IsNullOrEmpty(errorMessage))
                {
                    <div class="alert alert-danger py-2 small" role="alert">
                        <i class="bi bi-exclamation-triangle-fill me-2"></i> @errorMessage
                    </div>
                }

                @if (!string.IsNullOrEmpty(successMessage))
                {
                    <div class="alert alert-success py-2 small" role="alert">
                        <i class="bi bi-check-circle-fill me-2"></i> @successMessage
                    </div>
                }

                <form @onsubmit="HandleLogin">
                    <div class="mb-3">
                        <label class="form-label text-secondary small fw-semibold">USERNAME</label>
                        <div class="input-group">
                            <span class="input-group-text bg-dark border-secondary text-secondary"><i
                                    class="bi bi-person-fill"></i></span>
                            <input type="text" class="form-control bg-dark border-secondary text-white"
                                   placeholder="e.g. player1 or admin" @bind="username" disabled="@isLoading" required/>
                        </div>
                    </div>

                    <div class="mb-4">
                        <label class="form-label text-secondary small fw-semibold">PASSWORD</label>
                        <div class="input-group">
                            <span class="input-group-text bg-dark border-secondary text-secondary"><i
                                    class="bi bi-key-fill"></i></span>
                            <input type="password" class="form-control bg-dark border-secondary text-white"
                                   placeholder="Enter password" @bind="password" disabled="@isLoading" required/>
                        </div>
                    </div>

                    <div class="d-grid">
                        <button type="submit" class="btn btn-warning fw-bold" disabled="@isLoading">
                            @if (isLoading)
                            {
                                <span class="spinner-border spinner-border-sm me-2" role="status"></span>
                                <span>Logging In...</span>
                            }
                            else
                            {
                                <i class="bi bi-box-arrow-in-right me-1"></i>
                                <span>Log In</span>
                            }
                        </button>
                    </div>
                </form>
            }
        </div>
    </div>
</div>

@code {
    private string username = "";
    private string password = "";
    private bool isLoading;
    private string? errorMessage;
    private string? successMessage;

    protected override async Task OnInitializedAsync()
    {
        NetworkStatus.StatusChanged += OnStatusChanged;
        Auth.AuthStateChanged += OnAuthStateChanged;
        await Auth.InitializeAsync();
    }

    private void OnStatusChanged(bool isOnline)
    {
        InvokeAsync(StateHasChanged);
    }

    private void OnAuthStateChanged()
    {
        InvokeAsync(StateHasChanged);
    }

    private async Task HandleLogin()
    {
        errorMessage = null;
        successMessage = null;

        if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
        {
            errorMessage = "Please enter both username and password.";
            return;
        }

        isLoading = true;
        try
        {
            var result = await Auth.LoginAsync(username.Trim(), password);
            if (result.Success)
            {
                successMessage = result.Message;
                Navigation.NavigateTo("");
            }
            else
            {
                errorMessage = result.Message;
            }
        }
        finally
        {
            isLoading = false;
        }
    }

    private async Task HandleLogout()
    {
        await Auth.LogoutAsync();
    }

    public void Dispose()
    {
        NetworkStatus.StatusChanged -= OnStatusChanged;
        Auth.AuthStateChanged -= OnAuthStateChanged;
    }

}