@page "/account/settings"
@attribute [Authorize]
@rendermode InteractiveServer

@using Microsoft.AspNetCore.Identity
@using RealCV.Infrastructure.Identity

@inject UserManager<ApplicationUser> UserManager
@inject SignInManager<ApplicationUser> SignInManager
@inject AuthenticationStateProvider AuthenticationStateProvider
@inject NavigationManager NavigationManager
@inject ILogger<Settings> Logger

<PageTitle>Account Settings - RealCV</PageTitle>

<div class="container py-5">
    <div class="row justify-content-center">
        <div class="col-lg-8">
            <div class="mb-4">
                <h1 class="fw-bold mb-1">Account Settings</h1>
                <p class="text-muted">Manage your account details and security</p>
            </div>

            @if (!string.IsNullOrEmpty(_successMessage))
            {
                <div class="alert alert-success alert-dismissible fade show" role="alert">
                    @_successMessage
                    <button type="button" class="btn-close" @onclick="() => _successMessage = null"></button>
                </div>
            }

            @if (!string.IsNullOrEmpty(_errorMessage))
            {
                <div class="alert alert-danger alert-dismissible fade show" role="alert">
                    @_errorMessage
                    <button type="button" class="btn-close" @onclick="() => _errorMessage = null"></button>
                </div>
            }

            <!-- Profile Section -->
            <div class="card border-0 shadow-sm mb-4">
                <div class="card-body p-4">
                    <h5 class="fw-bold mb-4">Profile Information</h5>

                    <div class="mb-3">
                        <label class="form-label small text-muted">Email Address</label>
                        <input type="email" class="form-control" value="@_userEmail" disabled />
                        <small class="text-muted">Email cannot be changed</small>
                    </div>

                    <div class="mb-3">
                        <label class="form-label small text-muted">Current Plan</label>
                        <div class="d-flex align-items-center gap-2">
                            <span class="badge bg-primary-subtle text-primary px-3 py-2">@_userPlan</span>
                            <a href="/account/billing" class="btn btn-sm btn-link">Manage</a>
                        </div>
                    </div>

                    <div class="mb-0">
                        <label class="form-label small text-muted">Member Since</label>
                        <p class="mb-0">@_memberSince?.ToString("dd MMMM yyyy")</p>
                    </div>
                </div>
            </div>

            <!-- Change Password Section -->
            <div class="card border-0 shadow-sm mb-4">
                <div class="card-body p-4">
                    <h5 class="fw-bold mb-4">Change Password</h5>

                    <EditForm Model="_passwordModel" OnValidSubmit="ChangePassword" FormName="change-password">
                        <DataAnnotationsValidator />

                        <div class="mb-3">
                            <label for="currentPassword" class="form-label small text-muted">Current Password</label>
                            <InputText type="password" id="currentPassword" class="form-control" @bind-Value="_passwordModel.CurrentPassword" />
                            <ValidationMessage For="() => _passwordModel.CurrentPassword" class="text-danger small" />
                        </div>

                        <div class="mb-3">
                            <label for="newPassword" class="form-label small text-muted">New Password</label>
                            <InputText type="password" id="newPassword" class="form-control" @bind-Value="_passwordModel.NewPassword" />
                            <ValidationMessage For="() => _passwordModel.NewPassword" class="text-danger small" />
                            <small class="text-muted">Minimum 12 characters with uppercase, lowercase, number, and special character</small>
                        </div>

                        <div class="mb-4">
                            <label for="confirmPassword" class="form-label small text-muted">Confirm New Password</label>
                            <InputText type="password" id="confirmPassword" class="form-control" @bind-Value="_passwordModel.ConfirmPassword" />
                            <ValidationMessage For="() => _passwordModel.ConfirmPassword" class="text-danger small" />
                        </div>

                        <button type="submit" class="btn btn-primary" disabled="@_isChangingPassword">
                            @if (_isChangingPassword)
                            {
                                <span class="spinner-border spinner-border-sm me-1" role="status"></span>
                            }
                            Update Password
                        </button>
                    </EditForm>
                </div>
            </div>

            <!-- Quick Links -->
            <div class="card border-0 shadow-sm">
                <div class="card-body p-4">
                    <h5 class="fw-bold mb-4">Quick Links</h5>
                    <div class="list-group list-group-flush">
                        <a href="/account/billing" class="list-group-item list-group-item-action d-flex justify-content-between align-items-center px-0 border-0">
                            <div>
                                <strong>Billing & Subscription</strong>
                                <p class="mb-0 small text-muted">Manage your plan and payment method</p>
                            </div>
                            <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" class="text-muted" viewBox="0 0 16 16">
                                <path fill-rule="evenodd" d="M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z"/>
                            </svg>
                        </a>
                        <a href="/dashboard" class="list-group-item list-group-item-action d-flex justify-content-between align-items-center px-0 border-0">
                            <div>
                                <strong>Dashboard</strong>
                                <p class="mb-0 small text-muted">View your CV verification history</p>
                            </div>
                            <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" class="text-muted" viewBox="0 0 16 16">
                                <path fill-rule="evenodd" d="M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z"/>
                            </svg>
                        </a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

@code {
    private string? _userEmail;
    private string _userPlan = "Free";
    private DateTime? _memberSince;
    private string? _successMessage;
    private string? _errorMessage;
    private bool _isChangingPassword;
    private PasswordChangeModel _passwordModel = new();

    protected override async Task OnInitializedAsync()
    {
        try
        {
            var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
            var userIdClaim = authState.User.FindFirst(ClaimTypes.NameIdentifier)?.Value;

            if (!string.IsNullOrEmpty(userIdClaim) && Guid.TryParse(userIdClaim, out var userId))
            {
                var user = await UserManager.FindByIdAsync(userId.ToString());
                if (user != null)
                {
                    _userEmail = user.Email;
                    _userPlan = user.Plan.ToString();
                    // Lockout end date is used as a proxy; in a real app you might have a CreatedAt field
                    _memberSince = DateTime.UtcNow.AddMonths(-1); // Placeholder
                }
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Error loading user settings");
            _errorMessage = "Unable to load account information.";
        }
    }

    private async Task ChangePassword()
    {
        if (_isChangingPassword) return;

        _isChangingPassword = true;
        _errorMessage = null;
        _successMessage = null;

        try
        {
            var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
            var userIdClaim = authState.User.FindFirst(ClaimTypes.NameIdentifier)?.Value;

            if (string.IsNullOrEmpty(userIdClaim) || !Guid.TryParse(userIdClaim, out var userId))
            {
                _errorMessage = "Unable to identify user.";
                return;
            }

            var user = await UserManager.FindByIdAsync(userId.ToString());
            if (user == null)
            {
                _errorMessage = "User not found.";
                return;
            }

            var result = await UserManager.ChangePasswordAsync(
                user,
                _passwordModel.CurrentPassword,
                _passwordModel.NewPassword);

            if (result.Succeeded)
            {
                _successMessage = "Password updated successfully.";
                _passwordModel = new PasswordChangeModel();
                await SignInManager.RefreshSignInAsync(user);
            }
            else
            {
                _errorMessage = string.Join(" ", result.Errors.Select(e => e.Description));
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Error changing password");
            _errorMessage = "An error occurred. Please try again.";
        }
        finally
        {
            _isChangingPassword = false;
        }
    }

    private class PasswordChangeModel
    {
        [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Current password is required")]
        public string CurrentPassword { get; set; } = "";

        [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "New password is required")]
        [System.ComponentModel.DataAnnotations.MinLength(12, ErrorMessage = "Password must be at least 12 characters")]
        public string NewPassword { get; set; } = "";

        [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Please confirm your new password")]
        [System.ComponentModel.DataAnnotations.Compare("NewPassword", ErrorMessage = "Passwords do not match")]
        public string ConfirmPassword { get; set; } = "";
    }
}