using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;

namespace Yh.SchClass.OpenApi.Tests;

/// <summary>
/// 配置读取测试：对应 appsettings.json 的真实结构 ——
/// <code>
/// "yh": { "open": {
///   "BaseHost": "http://base.yunhaixingtong.com",
///   "BasePath": "/userbase",        // UserBase 用，教务不用它
///   "SchClassPath": "/bschclass"    // 教务用它
/// }}
/// </code>
/// </summary>
public class SchClassOpenApiConfigTests
{
    private static IConfiguration BuildConfig(Dictionary<string, string?> kv)
        => new ConfigurationBuilder().AddInMemoryCollection(kv).Build()!;

    [Fact]
    public void 共享节_SchClassPath映射为教务BasePath()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
            ["yh:open:BasePath"] = "/userbase",
            ["yh:open:SchClassPath"] = "/bschclass",
        });

        var options = new SchClassOpenApiOptions();
        var shared = config.GetSection(SchClassOpenApiOptions.SharedSectionName);
        options.FillFromSharedSection(key => shared[key]);

        Assert.Equal("http://base.yunhaixingtong.com", options.BaseHost);
        // 关键：教务用 SchClassPath，不是共享节里的 BasePath(/userbase)
        Assert.Equal("/bschclass", options.BasePath);
        Assert.Equal("http://base.yunhaixingtong.com/bschclass", options.ResolveBaseUrl());
    }

    [Fact]
    public void 共享节_路径带空格与斜杠可归一化()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
            ["yh:open:SchClassPath"] = " /bschclass/",   // 模拟配置里常见的多余空格/尾斜杠
        });

        var options = new SchClassOpenApiOptions();
        var shared = config.GetSection(SchClassOpenApiOptions.SharedSectionName);
        options.FillFromSharedSection(key => shared[key]);

        Assert.Equal("/bschclass", options.BasePath);
        Assert.Equal("http://base.yunhaixingtong.com/bschclass", options.ResolveBaseUrl());
    }

    [Fact]
    public void 共享节_未配SchClassPath时BasePath保持空()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
            ["yh:open:BasePath"] = "/userbase",   // 不允许被教务误用
        });

        var options = new SchClassOpenApiOptions();
        var shared = config.GetSection(SchClassOpenApiOptions.SharedSectionName);
        options.FillFromSharedSection(key => shared[key]);

        Assert.Equal("http://base.yunhaixingtong.com", options.BaseHost);
        Assert.Null(options.BasePath);
        Assert.Equal("http://base.yunhaixingtong.com", options.ResolveBaseUrl());
    }

    [Fact]
    public void 独立节优先_共享节仅回填缺失项()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:schclass:open:BasePath"] = "/sch-only",     // 独立节只给了路径
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
            ["yh:open:SchClassPath"] = "/bschclass",
            ["yh:open:AppKey"] = "100002",
            ["yh:open:AppSecret"] = "secret",
        });

        var options = new SchClassOpenApiOptions();
        config.GetSection(SchClassOpenApiOptions.SectionName).Bind(options);
        var shared = config.GetSection(SchClassOpenApiOptions.SharedSectionName);
        options.FillFromSharedSection(key => shared[key]);

        Assert.Equal("http://base.yunhaixingtong.com", options.BaseHost);  // 从共享节回填
        Assert.Equal("/sch-only", options.BasePath);                       // 独立节优先，不被覆盖
        Assert.Equal("100002", options.AppKey);                            // AppKey 回填
        Assert.Equal("secret", options.AppSecret);
    }

    [Fact]
    public void DI_注册后可解析门面且地址来自配置()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
            ["yh:open:SchClassPath"] = "/bschclass",
        });

        var services = new ServiceCollection();
        services.AddSchClassOpenApi(config);
        using var provider = services.BuildServiceProvider();

        var options = provider.GetRequiredService<IOptions<SchClassOpenApiOptions>>().Value;
        Assert.Equal("http://base.yunhaixingtong.com/bschclass", options.ResolveBaseUrl());

        var facade = provider.GetRequiredService<SchClassOpenApi>();
        Assert.NotNull(facade.SchInfo);
        Assert.NotNull(facade.StuInfo);
        Assert.Equal(new Uri("http://base.yunhaixingtong.com/bschclass"), facade.HttpBaseAddress);
    }

    [Fact]
    public void DI_独立节配置整节生效()
    {
        var config = BuildConfig(new Dictionary<string, string?>
        {
            ["yh:schclass:open:BaseHost"] = "http://sch.example.com",
            ["yh:schclass:open:BasePath"] = "/sch",
            ["yh:schclass:open:ReadTimeoutMs"] = "3000",
            ["yh:open:BaseHost"] = "http://base.yunhaixingtong.com",
        });

        var services = new ServiceCollection();
        services.AddSchClassOpenApi(config);
        using var provider = services.BuildServiceProvider();

        var options = provider.GetRequiredService<IOptions<SchClassOpenApiOptions>>().Value;
        Assert.Equal("http://sch.example.com", options.BaseHost);
        Assert.Equal("/sch", options.BasePath);
        Assert.Equal(3000, options.ReadTimeoutMs);
    }
}