package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"testing"
	"time"

	"git.x2erp.com/qdy/go-svc-code/internal/opencode"
)

// TestMessageResponseTimeComparison 性能对比测试：比较8787端口和8020端口的历史消息加载性能
func TestMessageResponseTimeComparison(t *testing.T) {
	// 测试会话ID - 使用现有会话
	sessionID := "ses_3aa9a94dfffeLIdWcLHCG97m7z"
	t.Logf("🚀 开始性能对比测试")
	t.Logf("测试会话ID: %s", sessionID)

	// 1. 测试8787端口（直接opencode服务）
	t.Run("DirectOpenCode_8787", func(t *testing.T) {
		directURL := "http://localhost:8787"

		// 检查服务是否可用
		if !isServiceRunningForMessages(t, directURL) {
			t.Skipf("8787端口服务不可用，跳过测试")
			return
		}

		t.Logf("📊 测试8787端口直接访问...")

		// 测试不同消息数量的加载性能
		testCases := []struct {
			name   string
			limit  int
			repeat int // 重复次数
		}{
			{"limit_10", 10, 5},
			{"limit_50", 50, 5},
			{"limit_100", 100, 5},
			{"no_limit", 0, 3},
		}

		for _, tc := range testCases {
			t.Run(tc.name, func(t *testing.T) {
				var totalDuration time.Duration
				var successes int
				var firstByteTimes []time.Duration

				for i := 0; i < tc.repeat; i++ {
					duration, firstByte, err := measureDirectRequest(directURL, sessionID, tc.limit)
					if err != nil {
						t.Logf("⚠️  第%d次请求失败: %v", i+1, err)
						continue
					}

					totalDuration += duration
					firstByteTimes = append(firstByteTimes, firstByte)
					successes++

					// 请求间短暂延迟
					time.Sleep(100 * time.Millisecond)
				}

				if successes > 0 {
					avgDuration := totalDuration / time.Duration(successes)
					var avgFirstByte time.Duration
					for _, fb := range firstByteTimes {
						avgFirstByte += fb
					}
					avgFirstByte /= time.Duration(len(firstByteTimes))

					t.Logf("✅ %s: 成功%d/%d次, 平均总时间: %v, 平均首字节: %v",
						tc.name, successes, tc.repeat, avgDuration, avgFirstByte)
				} else {
					t.Errorf("❌ %s: 所有请求都失败", tc.name)
				}
			})
		}
	})

	// 2. 测试8020端口（svc-code代理）
	t.Run("SvcCodeProxy_8020", func(t *testing.T) {
		proxyURL := "http://localhost:8020"

		// 检查服务是否可用
		if !isServiceRunningForMessages(t, proxyURL) {
			t.Skipf("8020端口服务不可用，跳过测试")
			return
		}

		// 获取认证token
		token, err := loginAndGetTokenForMessagesTest(t, proxyURL)
		if err != nil {
			t.Skipf("获取认证token失败: %v，跳过8020端口测试", err)
			return
		}

		t.Logf("📊 测试8020端口代理访问...")
		t.Logf("Token获取成功（前20位）: %s...", token[:minForMessagesTest(20, len(token))])

		// 测试不同消息数量的加载性能
		testCases := []struct {
			name   string
			limit  int
			repeat int // 重复次数
		}{
			{"limit_10", 10, 5},
			{"limit_50", 50, 5},
			{"limit_100", 100, 5},
			{"no_limit", 0, 3},
		}

		for _, tc := range testCases {
			t.Run(tc.name, func(t *testing.T) {
				var totalDuration time.Duration
				var successes int
				var firstByteTimes []time.Duration

				for i := 0; i < tc.repeat; i++ {
					duration, firstByte, err := measureProxyRequest(proxyURL, sessionID, token, tc.limit)
					if err != nil {
						t.Logf("⚠️  第%d次请求失败: %v", i+1, err)
						continue
					}

					totalDuration += duration
					firstByteTimes = append(firstByteTimes, firstByte)
					successes++

					// 请求间短暂延迟
					time.Sleep(100 * time.Millisecond)
				}

				if successes > 0 {
					avgDuration := totalDuration / time.Duration(successes)
					var avgFirstByte time.Duration
					for _, fb := range firstByteTimes {
						avgFirstByte += fb
					}
					avgFirstByte /= time.Duration(len(firstByteTimes))

					t.Logf("✅ %s: 成功%d/%d次, 平均总时间: %v, 平均首字节: %v",
						tc.name, successes, tc.repeat, avgDuration, avgFirstByte)
				} else {
					t.Errorf("❌ %s: 所有请求都失败", tc.name)
				}
			})
		}
	})
}

// TestPerformanceSummary 性能对比总结
func TestPerformanceSummary(t *testing.T) {
	sessionID := "ses_3aa9a94dfffeLIdWcLHCG97m7z"

	// 只测试limit=50的情况，进行更详细的对比
	t.Logf("📈 性能对比总结测试 (limit=50)")

	// 测试8787端口
	directTimes := []time.Duration{}
	directFirstBytes := []time.Duration{}
	directURL := "http://localhost:8787"

	if isServiceRunningForMessages(t, directURL) {
		t.Log("🔍 测试8787端口...")
		for i := 0; i < 10; i++ {
			duration, firstByte, err := measureDirectRequest(directURL, sessionID, 50)
			if err != nil {
				t.Logf("⚠️  8787端口第%d次请求失败: %v", i+1, err)
				continue
			}
			directTimes = append(directTimes, duration)
			directFirstBytes = append(directFirstBytes, firstByte)
			time.Sleep(50 * time.Millisecond)
		}
	}

	// 测试8020端口
	proxyTimes := []time.Duration{}
	proxyFirstBytes := []time.Duration{}
	proxyURL := "http://localhost:8020"
	token := ""

	if isServiceRunningForMessages(t, proxyURL) {
		t.Log("🔍 测试8020端口...")
		token, _ = loginAndGetTokenForMessagesTest(t, proxyURL)
		if token != "" {
			for i := 0; i < 10; i++ {
				duration, firstByte, err := measureProxyRequest(proxyURL, sessionID, token, 50)
				if err != nil {
					t.Logf("⚠️  8020端口第%d次请求失败: %v", i+1, err)
					continue
				}
				proxyTimes = append(proxyTimes, duration)
				proxyFirstBytes = append(proxyFirstBytes, firstByte)
				time.Sleep(50 * time.Millisecond)
			}
		}
	}

	// 分析结果
	if len(directTimes) > 0 && len(proxyTimes) > 0 {
		directAvg := averageDuration(directTimes)
		directFBAvg := averageDuration(directFirstBytes)
		proxyAvg := averageDuration(proxyTimes)
		proxyFBAvg := averageDuration(proxyFirstBytes)

		diff := proxyAvg - directAvg
		diffPercent := float64(diff) / float64(directAvg) * 100

		t.Logf("\n📊 性能对比结果:")
		t.Logf("   8787端口（直接）: 平均总时间=%v, 平均首字节=%v", directAvg, directFBAvg)
		t.Logf("   8020端口（代理）: 平均总时间=%v, 平均首字节=%v", proxyAvg, proxyFBAvg)
		t.Logf("   差异: %v (%.1f%%)", diff, diffPercent)

		if diffPercent > 20 {
			t.Logf("⚠️  8020端口比8787端口慢%.1f%%，可能存在代理开销", diffPercent)
		} else if diffPercent > 50 {
			t.Logf("❌ 8020端口性能显著下降，建议优化代理逻辑")
		} else if diffPercent < -10 {
			t.Logf("✅ 8020端口性能更好，可能包含缓存优化")
		} else {
			t.Logf("✅ 两端性能接近，差异在可接受范围内")
		}
	} else {
		t.Logf("⚠️  无法完成完整对比，部分端口数据缺失")
		if len(directTimes) == 0 {
			t.Logf("   - 8787端口无有效数据")
		}
		if len(proxyTimes) == 0 {
			t.Logf("   - 8020端口无有效数据")
		}
	}
}

// measureDirectRequest 测量直接访问8787端口的请求性能
func measureDirectRequest(baseURL, sessionID string, limit int) (totalDuration, firstByteDuration time.Duration, err error) {
	// 构造URL
	url := fmt.Sprintf("%s/session/%s/message", baseURL, sessionID)
	if limit > 0 {
		url = fmt.Sprintf("%s?limit=%d", url, limit)
	}

	client := &http.Client{
		Timeout: 30 * time.Second,
	}

	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return 0, 0, fmt.Errorf("创建请求失败: %w", err)
	}
	req.Header.Set("Accept", "application/json")

	startTime := time.Now()

	// 监听响应首字节
	req.Header.Set("Accept-Encoding", "identity") // 禁用压缩以便准确测量

	resp, err := client.Do(req)
	if err != nil {
		return 0, 0, fmt.Errorf("HTTP请求失败: %w", err)
	}
	defer resp.Body.Close()

	// 记录首字节到达时间
	firstByteTime := time.Now()
	firstByteDuration = firstByteTime.Sub(startTime)

	// 读取完整响应体
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return 0, 0, fmt.Errorf("读取响应体失败: %w", err)
	}

	totalDuration = time.Since(startTime)

	// 验证响应状态
	if resp.StatusCode != http.StatusOK {
		return 0, 0, fmt.Errorf("状态码错误: %d, 响应: %s", resp.StatusCode, string(body[:minForMessagesTest(200, len(body))]))
	}

	// 验证响应格式
	var messages []opencode.SessionMessage
	if err := json.Unmarshal(body, &messages); err != nil {
		return 0, 0, fmt.Errorf("解析响应失败: %w", err)
	}

	return totalDuration, firstByteDuration, nil
}

// measureProxyRequest 测量通过8020端口代理的请求性能
func measureProxyRequest(baseURL, sessionID, token string, limit int) (totalDuration, firstByteDuration time.Duration, err error) {
	// 构造URL
	url := fmt.Sprintf("%s/api/session/messages", baseURL)

	// 创建请求体
	requestBody := map[string]interface{}{
		"sessionID": sessionID,
	}
	if limit > 0 {
		requestBody["limit"] = limit
	}

	jsonBody, err := json.Marshal(requestBody)
	if err != nil {
		return 0, 0, fmt.Errorf("编码请求体失败: %w", err)
	}

	client := &http.Client{
		Timeout: 30 * time.Second,
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonBody))
	if err != nil {
		return 0, 0, fmt.Errorf("创建请求失败: %w", err)
	}

	// 添加认证头
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("Accept", "application/json")
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept-Encoding", "identity")

	startTime := time.Now()

	resp, err := client.Do(req)
	if err != nil {
		return 0, 0, fmt.Errorf("HTTP请求失败: %w", err)
	}
	defer resp.Body.Close()

	// 记录首字节到达时间
	firstByteTime := time.Now()
	firstByteDuration = firstByteTime.Sub(startTime)

	// 读取完整响应体
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return 0, 0, fmt.Errorf("读取响应体失败: %w", err)
	}

	totalDuration = time.Since(startTime)

	// 验证响应状态
	if resp.StatusCode != http.StatusOK {
		return 0, 0, fmt.Errorf("状态码错误: %d, 响应: %s", resp.StatusCode, string(body[:minForMessagesTest(200, len(body))]))
	}

	// 验证响应格式
	var result struct {
		Success bool   `json:"success"`
		Message string `json:"message"`
		Data    struct {
			Messages []opencode.SessionMessage `json:"messages"`
			Count    int                       `json:"count"`
		} `json:"data"`
	}

	if err := json.Unmarshal(body, &result); err != nil {
		return 0, 0, fmt.Errorf("解析响应失败: %w", err)
	}

	if !result.Success {
		return 0, 0, fmt.Errorf("API调用失败: %s", result.Message)
	}

	return totalDuration, firstByteDuration, nil
}

// averageDuration 计算平均时长
func averageDuration(durations []time.Duration) time.Duration {
	if len(durations) == 0 {
		return 0
	}
	var total time.Duration
	for _, d := range durations {
		total += d
	}
	return total / time.Duration(len(durations))
}