package openinstall

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/stretchr/testify/assert"
)

// TestChannelParameter 验证 OpenInstall 客户端是否正确传递了 channel 参数
func TestChannelParameter(t *testing.T) {
	// 1. 启动 Mock Server
	mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// 验证请求路径
		if r.URL.Path == "/data/sum/growth" {
			// 验证 Query 参数
			query := r.URL.Query()
			channel := query.Get("channel")

			// 核心验证点：channel 参数必须等于即使的 inviteCode
			if channel == "TEST_INVITE_CODE_123" {
				w.WriteHeader(http.StatusOK)
				// 返回假数据
				w.Write([]byte(`{
					"code": 0,
					"body": [
						{"key": "ios", "value": 100},
						{"key": "android", "value": 200}
					]
				}`))
				return
			}

			// 如果 channel 不匹配，返回错误
			w.WriteHeader(http.StatusBadRequest)
			w.Write([]byte(`{"code": 400, "error": "channel mismatch"}`))
			return
		}

		w.WriteHeader(http.StatusNotFound)
	}))
	defer mockServer.Close()

	// 2. 临时修改 apiBaseURL 指向 Mock Server
	originalBaseURL := apiBaseURL
	apiBaseURL = mockServer.URL
	defer func() { apiBaseURL = originalBaseURL }()

	// 3. 初始化客户端
	client := NewClient("test-api-key")

	// 4. 调用接口 (传入测试用的邀请码)
	ctx := context.Background()
	stats, err := client.GetPlatformDownloads(ctx, "TEST_INVITE_CODE_123")

	// 5. 验证结果
	assert.NoError(t, err)
	assert.NotNil(t, stats)

	// 验证数据正确解析 (iOS=100, Android=200, Total=300)
	assert.Equal(t, int64(100), stats.IOS, "iOS count should match mock data")
	assert.Equal(t, int64(200), stats.Android, "Android count should match mock data")
	assert.Equal(t, int64(300), stats.Total, "Total count should match sum of mock data")

	t.Logf("Success! Channel parameter 'TEST_INVITE_CODE_123' was correctly sent to server.")
}