@page "/account/login"
@using System.Text.Json
@layout EmptyLayout
@inject ILogger<Login> Logger
@inject IJSRuntime JS

<PageTitle>登录</PageTitle>

@if (!dataLoaded)
{
    <Spin Spinning="_isLoading" />
}
else
{
    <Flex Style="height:100vh" Justify="FlexJustify.Center" Align="FlexAlign.Center" Direction="FlexDirection.Vertical">
        <GridRow Justify="RowJustify.Center" Class="">
            <GridCol>
                <Card>
                    <Form @ref="form" Model="@login" OnFinish="LoginAsync">
                        <FluentValidationValidator />
                        <FormItem>
                            <AntDesign.Input Placeholder="登录账号" Size="InputSize.Large" @bind-Value="@login.Account">
                                <Prefix><Icon Type="user" /></Prefix>
                            </AntDesign.Input>
                        </FormItem>
                        <FormItem>
                            <AntDesign.Input Placeholder="登录密码" Size="InputSize.Large" @bind-Value="@login.Password" Type="InputType.Password">
                                <Prefix><Icon Type="lock" /></Prefix>
                            </AntDesign.Input>
                        </FormItem>
                        <FormItem>
                            <a style="float: left;">
                                忘记密码
                            </a>
                            <a style="float: right;">
                                <NavLink href="/register">马上注册</NavLink>
                            </a>
                        </FormItem>
                        <FormItem>
                            <Button Type="ButtonType.Primary" HtmlType="submit" Class="submit" Size="ButtonSize.Large" Block>登录</Button>
                        </FormItem>
                        <FormItem>
                            <a @onclick="setAccount">
                                设置开发帐号
                            </a>
                        </FormItem>
                    </Form>
                </Card>
            </GridCol>
        </GridRow>
        <GridRow Style="padding-top:40px">
            <span style="font-size:12px;padding-right:3px;">Copyright © 2025-@DateTime.Now.Year Atomlust.com All rights reserved.</span>
            <span style="font-size:12px">runing as @handler</span>
        </GridRow>
    </Flex>
}

@code {
    string handler = "Server";

    [Parameter]
    [SupplyParameterFromQuery(Name = "ReturnUrl")]
    public string? ReturnUrl { get; set; }

    [SupplyParameterFromForm]
    public LoginModel login { get; set; } = new();
    private Form<LoginModel> form = null!;

    bool dataLoaded = false;

    string message { get; set; } = string.Empty;

    private bool _isLoading = false;

    protected override void OnInitialized()
    {
        if (OperatingSystem.IsBrowser())
        {
            handler = "Wasm";
        }
        else
        {
            handler = "Server";
        }
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            var authState = await AuthStateProvider.GetAuthenticationStateAsync();
            if (authState.User.Identity != null && authState.User.Identity.IsAuthenticated)
            {
                Navigation.NavigateTo(ReturnUrl ?? "/");
            }
        }
        if (!dataLoaded)
        {
            dataLoaded = true;
            StateHasChanged();
        }
    }

    private async Task LoginAsync()
    {
        if (!form.Validate()) return;

        _isLoading = true;
        StateHasChanged();

        try
        {
            var api = "/api/sign/in";

            if (!OperatingSystem.IsBrowser())
            {
                // Server 模式：使用浏览器发起的 fetch（通过 JS）并携带 credentials: 'include'
                Logger.LogInformation("Server 模式，使用浏览器 fetch 登录");
                var jsResult = await JS.InvokeAsync<JsonElement>("__atomx_post_json", api, login);

                var success = jsResult.TryGetProperty("success", out var sprop) && sprop.GetBoolean();
                if (success && jsResult.TryGetProperty("data", out var dprop) && dprop.ValueKind == JsonValueKind.Object)
                {
                    var token = dprop.TryGetProperty("token", out var t) ? t.GetString() ?? string.Empty : string.Empty;
                    var refresh = dprop.TryGetProperty("refreshToken", out var r) ? r.GetString() ?? string.Empty : string.Empty;

                    // WASM 的 localStorage 在 Server Circuit 中无意义，兼容auto模式写入 localStorage。
                    try
                    {
                        await localStorage.SetItemAsync(StorageKeys.AccessToken, token);
                        await localStorage.SetItemAsync(StorageKeys.RefreshToken, refresh);

                        if (AuthStateProvider is PersistentAuthenticationStateProvider provider)
                        {
                            provider.UpdateAuthenticationState(token);
                        }
                    }
                    catch { }

                    // 浏览器已通过 fetch 收到 Set-Cookie；强制重载使 Circuit 使用新 Cookie。
                    Logger.LogInformation($"登录成功，server 跳转: {ReturnUrl}");
                    Navigation.NavigateTo(ReturnUrl ?? "/", forceLoad: true);
                }
                else
                {
                    var msg = jsResult.TryGetProperty("message", out var m) ? m.GetString() ?? "登录失败" : "登录失败";
                    ModalService.Error(new ConfirmOptions() { Title = "提示", Content = msg });
                }
            }
            else
            {
                // Wasm 模式：继续使用 HttpService（之前逻辑），保存 localStorage 并更新 AuthStateProvider
                var result = await HttpService.Post<ApiResult<AuthResponse>>(api, login);
                if (result.Success && result.Data != null)
                {
                    var auth = result.Data;
                    await localStorage.SetItemAsync(StorageKeys.AccessToken, auth.Token);
                    await localStorage.SetItemAsync(StorageKeys.RefreshToken, auth.RefreshToken);

                    if (AuthStateProvider is PersistentAuthenticationStateProvider provider)
                    {
                        provider.UpdateAuthenticationState(auth.Token);
                    }

                    Logger.LogInformation("登录成功，wasm 跳转: {ReturnUrl}", ReturnUrl);
                    Navigation.NavigateTo(ReturnUrl ?? "/");
                }
                else
                {
                    ModalService.Error(new ConfirmOptions() { Title = "提示", Content = result.Message });
                }
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "登录失败");
            ModalService.Error(new ConfirmOptions() { Title = "错误", Content = "登录异常，请稍后重试" });
        }
        finally
        {
            _isLoading = false;
            StateHasChanged();
        }
    }

    private async Task OnPasswordKeyDown(KeyboardEventArgs value)
    {
        if (value.Key == "Enter")
        {
            await LoginAsync();
        }
    }

    void setAccount()
    {
        login.Account = "admin";
        login.Password = "admin888";
    }
}

@* 页面内 JS 辅助：用于在 Server 模式下从浏览器发起 POST 并携带凭证，使浏览器接收 Set-Cookie *@
<script>
    window.__atomx_post_json = async function (url, data) {
        try {
            const res = await fetch(url, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                credentials: 'include',
                body: JSON.stringify(data)
            });
            const text = await res.text();
            try {
                return JSON.parse(text);
            } catch {
                return { success: res.ok, message: text };
            }
        } catch (err) {
            return { success: false, message: err?.toString() ?? 'network error' };
        }
    };
</script>