using System.Net;
using System.Text.Json;
using Moq;
using Moq.Protected;
using XafPet.Desktop.PetEngine;
using Xunit;

namespace XafPet.Desktop.Tests;

public class ApiClientTests
{
    private static ApiClient CreateClientWithResponse(HttpStatusCode code, string json, string authToken = "test-token")
    {
        var handler = new Mock<HttpMessageHandler>();
        handler.Protected()
            .Setup<Task<HttpResponseMessage>>("SendAsync",
                ItExpr.IsAny<HttpRequestMessage>(),
                ItExpr.IsAny<CancellationToken>())
            .ReturnsAsync(new HttpResponseMessage(code)
            {
                Content = new StringContent(json, System.Text.Encoding.UTF8, "application/json")
            });
        var http = new HttpClient(handler.Object);
        return new ApiClient(http, "http://localhost:9082", authToken);
    }

    [Fact]
    public async Task GetTodayTasks_ReturnsTaskList()
    {
        var json = """
        { "code": 200, "message": "ok", "data": [
            { "id": 1, "title": "喝水", "status": "PENDING", "dueDate": "2026-10-10" }
        ] }
        """;
        var client = CreateClientWithResponse(HttpStatusCode.OK, json);

        var tasks = await client.GetTodayTasksAsync();

        Assert.Single(tasks);
        Assert.Equal("喝水", tasks[0].Title);
        Assert.Equal("PENDING", tasks[0].Status);
    }

    [Fact]
    public async Task GetEnergyOverview_ReturnsDimensions()
    {
        var json = """
        { "code": 200, "message": "ok", "data": {
            "dimensions": [
              { "dimension": "身", "value": 80, "color": "#FF8C42" },
              { "dimension": "智", "value": 45, "color": "#6366F1" }
            ]
        } }
        """;
        var client = CreateClientWithResponse(HttpStatusCode.OK, json);

        var overview = await client.GetEnergyOverviewAsync();

        Assert.Equal(2, overview.Dimensions.Count);
        Assert.Equal(80, overview.Dimensions[0].Value);
    }

    [Fact]
    public async Task GetDailyCheckin_ReturnsStatus()
    {
        var json = """
        { "code": 200, "message": "ok", "data": { "checked": true, "items": ["water", "exercise"] } }
        """;
        var client = CreateClientWithResponse(HttpStatusCode.OK, json);

        var status = await client.GetDailyCheckinAsync();

        Assert.True(status.Checked);
        Assert.Contains("water", status.Items);
    }

    [Fact]
    public async Task CompleteDrinkWater_PostsCorrectEndpoint()
    {
        var json = """{ "code": 200, "message": "打卡成功", "data": null }""";
        var client = CreateClientWithResponse(HttpStatusCode.OK, json);

        var result = await client.CompleteDrinkWaterAsync();

        Assert.Equal("打卡成功", result.Message);
    }

    [Fact]
    public async Task NonSuccessCode_ThrowsApiException()
    {
        var json = """{ "code": 500, "message": "服务器错误", "data": null }""";
        var client = CreateClientWithResponse(HttpStatusCode.OK, json);

        await Assert.ThrowsAsync<ApiException>(() => client.GetTodayTasksAsync());
    }
}