@page "/logout"
@layout EmptyLayout
@inject IJSRuntime JS
@inject ILogger<Logout> Logger
@inject NavigationManager Navigation
@inject AuthenticationStateProvider AuthStateProvider
@inject HttpService HttpService
@using System.Text.Json

@code {
    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (!firstRender) return;

        try
        {
            // 如果运行在浏览器 (WASM)，直接调用后端 API 并清除 localStorage / provider
            if (OperatingSystem.IsBrowser())
            {
                Logger.LogInformation("WASM logout: call API and clear local storage");
                try
                {
                    await HttpService.Post<ApiResult<string>>("/api/sign/out", null);
                }
                catch { /* 忽略网络错误，仍继续清理客户端状态 */ }

                if (AuthStateProvider is PersistentAuthenticationStateProvider provider)
                {
                    await provider.MarkUserAsLoggedOut();
                }

                Navigation.NavigateTo("/account/login");
            }
            else
            {
                // Server 模式：通过浏览器 fetch 发起带凭据的请求以便浏览器接收并删除 Cookie，然后强制重载
                Logger.LogInformation("Server logout: use browser fetch to call /api/sign/out");
                var jsResult = await JS.InvokeAsync<JsonElement>("__atomx_post_json", "/api/sign/out", (object?)null);

                // 尝试解析返回，忽略细节
                var success = jsResult.ValueKind == JsonValueKind.Object && jsResult.TryGetProperty("success", out var sp) && sp.GetBoolean();
                Logger.LogInformation("Server logout result: {Success}", success);

                try
                {
                    // 清理 localStorage（如果有的话）
                    await localStorage.RemoveItemAsync(StorageKeys.AccessToken);
                    await localStorage.RemoveItemAsync(StorageKeys.RefreshToken);
                }
                catch { }

                // 尽管我们可能已经处理了服务器态，强制重新加载确保 Circuit 更新
                Navigation.NavigateTo("/account/login", forceLoad: true);
            }
        }
        catch (Exception ex)
        {
            Logger.LogWarning(ex, "Logout failed but proceeding to login page");
            Navigation.NavigateTo("/account/login", forceLoad: true);
        }
    }
}

@* 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/删除 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: data ? JSON.stringify(data) : null
            });
            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>