package unit

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

	"github.com/smartystreets/goconvey/convey"
	"github.com/subconverter-go/internal/config"
	httpserver "github.com/subconverter-go/internal/http"
)

// TestHTTPServerCreation 测试HTTP服务器创建
func TestHTTPServerCreation(t *testing.T) {
	convey.Convey("HTTP服务器创建测试", t, func() {
		convey.Convey("创建默认HTTP服务器", func() {
			manager, err := config.NewConfigManager("")
			convey.So(err, convey.ShouldBeNil)
			defer manager.Close()

			server, err := httpserver.NewServer(manager)
			convey.So(err, convey.ShouldBeNil)
			convey.So(server, convey.ShouldNotBeNil)

			// 验证服务器配置
			stats := server.GetStats()
			convey.So(stats, convey.ShouldNotBeNil)
			convey.So(stats["host"], convey.ShouldEqual, "0.0.0.0")
			convey.So(stats["port"], convey.ShouldEqual, 25500)

			// 验证运行时间
			uptime := server.GetUptime()
			convey.So(uptime, convey.ShouldBeGreaterThan, 0)
		})

		convey.Convey("创建带自定义配置的HTTP服务器", func() {
			manager, err := config.NewConfigManager("")
			convey.So(err, convey.ShouldBeNil)
			defer manager.Close()

			// 修改服务器配置
			newConfig := manager.GetConfig().Clone()
			newConfig.Server.Host = "127.0.0.1"
			newConfig.Server.Port = 8080

			err = manager.UpdateConfig(newConfig)
			convey.So(err, convey.ShouldBeNil)

			server, err := httpserver.NewServer(manager)
			convey.So(err, convey.ShouldBeNil)
			convey.So(server, convey.ShouldNotBeNil)

			stats := server.GetStats()
			convey.So(stats["host"], convey.ShouldEqual, "127.0.0.1")
			convey.So(stats["port"], convey.ShouldEqual, 8080)
		})
	})
}

// TestHTTPServerRoutes 测试HTTP服务器路由
func TestHTTPServerRoutes(t *testing.T) {
	convey.Convey("HTTP服务器路由测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)
		defer server.Stop()

		app := server.GetApp()

		convey.Convey("健康检查路由", func() {
			req := httptest.NewRequest("GET", "/health", nil)
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)

			// 验证响应内容
			// 这里简化测试，实际项目中应该解析JSON
			convey.So(resp.Header.Get("Content-Type"), convey.ShouldContain, "application/json")
		})

		convey.Convey("版本信息路由", func() {
			req := httptest.NewRequest("GET", "/version", nil)
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)
			convey.So(resp.Header.Get("Content-Type"), convey.ShouldContain, "application/json")
		})

		convey.Convey("根路由", func() {
			req := httptest.NewRequest("GET", "/", nil)
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)
			convey.So(resp.Header.Get("Content-Type"), convey.ShouldContain, "application/json")
		})

		convey.Convey("统计信息路由", func() {
			req := httptest.NewRequest("GET", "/api/stats", nil)
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)
			convey.So(resp.Header.Get("Content-Type"), convey.ShouldContain, "application/json")
		})

		convey.Convey("未实现的路由", func() {
			req := httptest.NewRequest("GET", "/api/sub", nil)
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 501) // Not Implemented
		})
	})
}

// TestHTTPServerMiddleware 测试HTTP服务器中间件
func TestHTTPServerMiddleware(t *testing.T) {
	convey.Convey("HTTP服务器中间件测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)
		defer server.Stop()

		app := server.GetApp()

		convey.Convey("CORS中间件", func() {
			req := httptest.NewRequest("GET", "/health", nil)
			req.Header.Set("Origin", "http://localhost:3000")
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)

			// 验证CORS头
			allowOrigin := resp.Header.Get("Access-Control-Allow-Origin")
			convey.So(allowOrigin, convey.ShouldNotBeEmpty)
		})

		convey.Convey("OPTIONS预检请求", func() {
			req := httptest.NewRequest("OPTIONS", "/health", nil)
			req.Header.Set("Origin", "http://localhost:3000")
			req.Header.Set("Access-Control-Request-Method", "GET")
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)
		})
	})
}

// TestHTTPServerWithRateLimit 测试带速率限制的HTTP服务器
func TestHTTPServerWithRateLimit(t *testing.T) {
	convey.Convey("带速率限制的HTTP服务器测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		// 启用速率限制
		newConfig := manager.GetConfig().Clone()
		newConfig.Security.RateLimit = 2 // 每分钟2个请求
		err = manager.UpdateConfig(newConfig)
		convey.So(err, convey.ShouldBeNil)

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)
		defer server.Stop()

		app := server.GetApp()

		convey.Convey("速率限制正常工作", func() {
			// 发送第一个请求
			req1 := httptest.NewRequest("GET", "/health", nil)
			resp1, err := app.Test(req1, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp1.StatusCode, convey.ShouldEqual, 200)

			// 发送第二个请求
			req2 := httptest.NewRequest("GET", "/health", nil)
			resp2, err := app.Test(req2, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp2.StatusCode, convey.ShouldEqual, 200)

			// 发送第三个请求（应该被限制）
			req3 := httptest.NewRequest("GET", "/health", nil)
			resp3, err := app.Test(req3, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp3.StatusCode, convey.ShouldEqual, 429) // Too Many Requests
		})
	})
}

// TestHTTPServerStats 测试HTTP服务器统计信息
func TestHTTPServerStats(t *testing.T) {
	convey.Convey("HTTP服务器统计信息测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)
		defer server.Stop()

		convey.Convey("获取统计信息", func() {
			stats := server.GetStats()
			convey.So(stats, convey.ShouldNotBeNil)

			// 验证统计信息字段
			convey.So(stats["uptime"], convey.ShouldNotBeEmpty)
			convey.So(stats["start_time"], convey.ShouldNotBeEmpty)
			convey.So(stats["host"], convey.ShouldEqual, "0.0.0.0")
			convey.So(stats["port"], convey.ShouldEqual, 25500)
			convey.So(stats["max_request_size"], convey.ShouldEqual, int64(10485760)) // 10MB
			convey.So(stats["read_timeout"], convey.ShouldEqual, 30)
			convey.So(stats["write_timeout"], convey.ShouldEqual, 30)
		})

		convey.Convey("运行时间递增", func() {
			uptime1 := server.GetUptime()
			time.Sleep(10 * time.Millisecond)
			uptime2 := server.GetUptime()

			convey.So(uptime2, convey.ShouldBeGreaterThan, uptime1)
		})
	})
}

// TestHTTPServerGracefulShutdown 测试HTTP服务器优雅关闭
func TestHTTPServerGracefulShutdown(t *testing.T) {
	convey.Convey("HTTP服务器优雅关闭测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)

		// 模拟服务器运行
		go func() {
			time.Sleep(100 * time.Millisecond)
			err := server.Stop()
			convey.So(err, convey.ShouldBeNil)
		}()

		// 验证服务器能够正常关闭
		time.Sleep(200 * time.Millisecond)
	})
}

// TestHTTPServerWithCustomSecurityConfig 测试自定义安全配置
func TestHTTPServerWithCustomSecurityConfig(t *testing.T) {
	convey.Convey("自定义安全配置测试", t, func() {
		manager, err := config.NewConfigManager("")
		convey.So(err, convey.ShouldBeNil)
		defer manager.Close()

		// 设置自定义CORS配置
		newConfig := manager.GetConfig().Clone()
		newConfig.Security.CorsOrigins = []string{"http://localhost:3000", "https://example.com"}
		newConfig.Security.RateLimit = 5
		err = manager.UpdateConfig(newConfig)
		convey.So(err, convey.ShouldBeNil)

		server, err := httpserver.NewServer(manager)
		convey.So(err, convey.ShouldBeNil)
		defer server.Stop()

		app := server.GetApp()

		convey.Convey("自定义CORS生效", func() {
			req := httptest.NewRequest("GET", "/health", nil)
			req.Header.Set("Origin", "http://localhost:3000")
			resp, err := app.Test(req, -1)
			convey.So(err, convey.ShouldBeNil)
			convey.So(resp.StatusCode, convey.ShouldEqual, 200)
		})
	})
}