@page "/admin/login"
@rendermode InteractiveServer
@inject AdminAuthService AuthService
@inject NavigationManager NavManager

<div class="portal-wrapper">
    <div class="portal-header">
        <div class="brand-icon" style="margin: 0 auto 1rem auto; width: 60px; height: 60px; font-size: 1.8rem; background: linear-gradient(135deg, var(--accent-purple), var(--primary));">
            <i class="bi bi-shield-lock-fill"></i>
        </div>
        @if (isFirstRun)
        {
            <h1 class="portal-title">First-Time Setup</h1>
            <p class="portal-subtitle">Create your primary administrator account to secure the RADIUS Controller panel</p>
        }
        else
        {
            <h1 class="portal-title">Administrator Login</h1>
            <p class="portal-subtitle">Access RADIUS server policies, session limits, and data accounting</p>
        }
    </div>

    <div class="glass-card">
        @if (isCheckingFirstRun)
        {
            <div style="text-align: center; padding: 2rem;">
                <div class="spinner-border text-primary" role="status"></div>
                <p style="margin-top: 1rem; color: var(--text-muted); font-size: 0.9rem;">Checking system configuration...</p>
            </div>
        }
        else if (isFirstRun)
        {
            <div style="background: rgba(20, 184, 166, 0.1); border: 1px solid rgba(20, 184, 166, 0.3); border-radius: 8px; padding: 0.85rem 1rem; margin-bottom: 1.5rem; font-size: 0.85rem; color: var(--accent-teal);">
                <i class="bi bi-info-circle-fill"></i> <strong>Welcome!</strong> No admin user exists in the database. Please create your administrator credentials below.
            </div>

            <EditForm Model="this" OnValidSubmit="HandleFirstTimeSetup">
                <div class="form-group">
                    <label class="form-label" for="setupUsername">Administrator Username</label>
                    <input id="setupUsername" 
                           type="text" 
                           class="form-control-glass" 
                           placeholder="e.g. admin" 
                           @bind="username" 
                           required />
                </div>

                <div class="form-group">
                    <label class="form-label" for="setupPassword">Password</label>
                    <input id="setupPassword" 
                           type="password" 
                           class="form-control-glass" 
                           placeholder="••••••••" 
                           @bind="password" 
                           required />
                </div>

                <div class="form-group">
                    <label class="form-label" for="confirmPassword">Confirm Password</label>
                    <input id="confirmPassword" 
                           type="password" 
                           class="form-control-glass" 
                           placeholder="••••••••" 
                           @bind="confirmPassword" 
                           required />
                </div>

                @if (!string.IsNullOrEmpty(errorMessage))
                {
                    <div style="color: var(--accent-rose); font-size: 0.875rem; margin-bottom: 1rem;">
                        <i class="bi bi-exclamation-triangle-fill"></i> @errorMessage
                    </div>
                }

                <button type="submit" class="btn-gradient-primary" disabled="@isSubmitting">
                    @if (isSubmitting)
                    {
                        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
                        <span>Creating Administrator Account...</span>
                    }
                    else
                    {
                        <i class="bi bi-person-check-fill"></i>
                        <span>Create Admin Account & Log In</span>
                    }
                </button>
            </EditForm>
        }
        else
        {
            <EditForm Model="this" OnValidSubmit="HandleLogin">
                <div class="form-group">
                    <label class="form-label" for="adminUsername">Username</label>
                    <input id="adminUsername" 
                           type="text" 
                           class="form-control-glass" 
                           placeholder="Username" 
                           @bind="username" 
                           required />
                </div>

                <div class="form-group">
                    <label class="form-label" for="adminPassword">Password</label>
                    <input id="adminPassword" 
                           type="password" 
                           class="form-control-glass" 
                           placeholder="••••••••" 
                           @bind="password" 
                           required />
                </div>

                @if (!string.IsNullOrEmpty(errorMessage))
                {
                    <div style="color: var(--accent-rose); font-size: 0.875rem; margin-bottom: 1rem;">
                        <i class="bi bi-exclamation-triangle-fill"></i> @errorMessage
                    </div>
                }

                <button type="submit" class="btn-gradient-primary" disabled="@isSubmitting">
                    @if (isSubmitting)
                    {
                        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
                        <span>Authenticating...</span>
                    }
                    else
                    {
                        <i class="bi bi-box-arrow-in-right"></i>
                        <span>Sign In to Admin Panel</span>
                    }
                </button>
            </EditForm>
        }
    </div>
</div>

@code {
    private string username = string.Empty;
    private string password = string.Empty;
    private string confirmPassword = string.Empty;

    private bool isCheckingFirstRun = true;
    private bool isFirstRun = false;
    private bool isSubmitting = false;
    private string errorMessage = string.Empty;

    protected override async Task OnInitializedAsync()
    {
        await AuthService.InitializeAsync();
        if (AuthService.IsAuthenticated)
        {
            NavManager.NavigateTo("/admin");
            return;
        }

        try
        {
            isFirstRun = !await AuthService.HasAnyAdminAsync();
        }
        catch
        {
            isFirstRun = false;
        }
        finally
        {
            isCheckingFirstRun = false;
        }
    }

    private async Task HandleFirstTimeSetup()
    {
        isSubmitting = true;
        errorMessage = string.Empty;

        if (string.IsNullOrWhiteSpace(username) || username.Trim().Length < 3)
        {
            errorMessage = "Username must be at least 3 characters long.";
            isSubmitting = false;
            return;
        }

        if (string.IsNullOrWhiteSpace(password) || password.Length < 6)
        {
            errorMessage = "Password must be at least 6 characters long.";
            isSubmitting = false;
            return;
        }

        if (password != confirmPassword)
        {
            errorMessage = "Password and Confirm Password do not match.";
            isSubmitting = false;
            return;
        }

        bool success = await AuthService.RegisterInitialAdminAsync(username, password);
        if (success)
        {
            NavManager.NavigateTo("/admin");
        }
        else
        {
            errorMessage = "Failed to create administrator account. An admin user may already exist.";
        }

        isSubmitting = false;
    }

    private async Task HandleLogin()
    {
        isSubmitting = true;
        errorMessage = string.Empty;

        bool success = await AuthService.LoginAsync(username, password);
        if (success)
        {
            NavManager.NavigateTo("/admin");
        }
        else
        {
            errorMessage = "Invalid admin username or password.";
        }

        isSubmitting = false;
    }
}