package go_web_gin

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

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/suite"
)

// AppTestSuite is the test suite for App
type AppTestSuite struct {
	suite.Suite
	app *App
}

// SetupSuite runs once before all tests
func (s *AppTestSuite) SetupSuite() {
	gin.SetMode(gin.TestMode)
	s.app = New()
}

// TearDownSuite runs once after all tests
func (s *AppTestSuite) TearDownSuite() {
	// Cleanup if needed
}

// SetupTest runs before each test
func (s *AppTestSuite) SetupTest() {
	// Reset state if needed
}

// TearDownTest runs after each test
func (s *AppTestSuite) TearDownTest() {
	// Cleanup after each test if needed
}

// TestNew tests the New function
func (s *AppTestSuite) TestNew() {
	app := New()
	s.NotNil(app, "New should return a non-nil App")
	s.NotNil(app.engine, "engine should be initialized")
	s.NotNil(app.logger, "logger should be initialized")
}

// TestNewSingleton tests that svr.GetEngine returns the same instance
func (s *AppTestSuite) TestNewSingleton() {
	app1 := New()
	app2 := New()
	s.Equal(app1.engine, app2.engine, "engine should be singleton")
}

// TestUseMiddleware tests the UseMiddleware method
func (s *AppTestSuite) TestUseMiddleware() {
	middlewareCalled := false
	middleware := func(c *gin.Context) {
		middlewareCalled = true
		c.Next()
	}

	s.app.UseMiddleware(middleware)

	// Create a test route to verify middleware
	s.app.engine.GET("/test-middleware", func(c *gin.Context) {
		c.Status(http.StatusOK)
	})

	req := httptest.NewRequest("GET", "/test-middleware", nil)
	w := httptest.NewRecorder()
	s.app.engine.ServeHTTP(w, req)

	s.True(middlewareCalled, "middleware should be called")
}

// TestRegisterRoutes tests the RegisterRoutes method
func (s *AppTestSuite) TestRegisterRoutes() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/test-route", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"message": "ok"})
		})
	})

	req := httptest.NewRequest("GET", "/test-route", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)

	s.Equal(http.StatusOK, w.Code)
	s.Contains(w.Body.String(), "ok")
}

// TestRegisterRoutesMultiple tests registering multiple routes
func (s *AppTestSuite) TestRegisterRoutesMultiple() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/route1", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"route": 1})
		})
		e.POST("/route2", func(c *gin.Context) {
			c.JSON(http.StatusCreated, gin.H{"route": 2})
		})
		e.PUT("/route3", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"route": 3})
		})
	})

	// Test GET
	req1 := httptest.NewRequest("GET", "/route1", nil)
	w1 := httptest.NewRecorder()
	app.engine.ServeHTTP(w1, req1)
	s.Equal(http.StatusOK, w1.Code)

	// Test POST
	req2 := httptest.NewRequest("POST", "/route2", nil)
	w2 := httptest.NewRecorder()
	app.engine.ServeHTTP(w2, req2)
	s.Equal(http.StatusCreated, w2.Code)

	// Test PUT
	req3 := httptest.NewRequest("PUT", "/route3", nil)
	w3 := httptest.NewRecorder()
	app.engine.ServeHTTP(w3, req3)
	s.Equal(http.StatusOK, w3.Code)
}

// TestDB tests the DB method returns nil when not initialized
func (s *AppTestSuite) TestDB() {
	app := New()
	s.Nil(app.DB(), "DB should be nil when not initialized")
}

// TestRedis tests the Redis method returns nil when not initialized
func (s *AppTestSuite) TestRedis() {
	app := New()
	s.Nil(app.Redis(), "Redis should be nil when not initialized")
}

// TestLogger tests the Logger method
func (s *AppTestSuite) TestLogger() {
	app := New()
	logger := app.Logger()
	s.NotNil(logger, "Logger should not be nil")
}

// TestLoggerNotNil tests that logger is always initialized
func (s *AppTestSuite) TestLoggerNotNil() {
	s.NotNil(s.app.Logger(), "Logger should always be initialized in New()")
}

// TestLoggerMethods tests that logger methods work
func (s *AppTestSuite) TestLoggerMethods() {
	s.NotPanics(func() {
		s.app.Logger().Info(nil, "Test info message")
		s.app.Logger().Debug(nil, "Test debug message")
		s.app.Logger().Warn(nil, "Test warn message")
	}, "Logger methods should not panic")
}

// TestLoggerWithContext tests logger with context
func (s *AppTestSuite) TestLoggerWithContext() {
	ctx := context.Background()
	s.NotPanics(func() {
		s.app.Logger().Info(ctx, "Test with context")
	}, "Logger should work with context")
}

// TestRunInvalidAddress tests Run with invalid address
func (s *AppTestSuite) TestRunInvalidAddress() {
	app := New()
	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/ping", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"pong": true})
		})
	})

	// Use a channel to handle the async nature of Run
	errCh := make(chan error, 1)
	go func() {
		errCh <- app.Run("invalid:address:format")
	}()

	select {
	case err := <-errCh:
		s.Error(err, "Run should return error for invalid address")
	case <-time.After(2 * time.Second):
		// Server might start, which is fine for this test
	}
}

// TestHTTPMethod tests various HTTP methods
func (s *AppTestSuite) TestHTTPMethod() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		e.DELETE("/delete", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"deleted": true})
		})
		e.PATCH("/patch", func(c *gin.Context) {
			c.JSON(http.StatusOK, gin.H{"patched": true})
		})
		e.OPTIONS("/options", func(c *gin.Context) {
			c.Status(http.StatusNoContent)
		})
		e.HEAD("/head", func(c *gin.Context) {
			c.Status(http.StatusOK)
		})
	})

	// Test DELETE
	req := httptest.NewRequest("DELETE", "/delete", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)
	s.Equal(http.StatusOK, w.Code)

	// Test PATCH
	req2 := httptest.NewRequest("PATCH", "/patch", nil)
	w2 := httptest.NewRecorder()
	app.engine.ServeHTTP(w2, req2)
	s.Equal(http.StatusOK, w2.Code)

	// Test OPTIONS
	req3 := httptest.NewRequest("OPTIONS", "/options", nil)
	w3 := httptest.NewRecorder()
	app.engine.ServeHTTP(w3, req3)
	s.Equal(http.StatusNoContent, w3.Code)

	// Test HEAD
	req4 := httptest.NewRequest("HEAD", "/head", nil)
	w4 := httptest.NewRecorder()
	app.engine.ServeHTTP(w4, req4)
	s.Equal(http.StatusOK, w4.Code)
}

// TestRouteGroup tests route groups
func (s *AppTestSuite) TestRouteGroup() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		api := e.Group("/api")
		{
			api.GET("/users", func(c *gin.Context) {
				c.JSON(http.StatusOK, gin.H{"users": []string{}})
			})
			api.GET("/posts", func(c *gin.Context) {
				c.JSON(http.StatusOK, gin.H{"posts": []string{}})
			})
		}
	})

	req1 := httptest.NewRequest("GET", "/api/users", nil)
	w1 := httptest.NewRecorder()
	app.engine.ServeHTTP(w1, req1)
	s.Equal(http.StatusOK, w1.Code)

	req2 := httptest.NewRequest("GET", "/api/posts", nil)
	w2 := httptest.NewRecorder()
	app.engine.ServeHTTP(w2, req2)
	s.Equal(http.StatusOK, w2.Code)
}

// TestMiddlewareChain tests middleware chain
func (s *AppTestSuite) TestMiddlewareChain() {
	app := New()
	order := []string{}

	app.UseMiddleware(func(c *gin.Context) {
		order = append(order, "middleware1-before")
		c.Next()
		order = append(order, "middleware1-after")
	})

	app.UseMiddleware(func(c *gin.Context) {
		order = append(order, "middleware2-before")
		c.Next()
		order = append(order, "middleware2-after")
	})

	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/chain", func(c *gin.Context) {
			order = append(order, "handler")
			c.Status(http.StatusOK)
		})
	})

	req := httptest.NewRequest("GET", "/chain", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)

	expected := []string{
		"middleware1-before",
		"middleware2-before",
		"handler",
		"middleware2-after",
		"middleware1-after",
	}
	s.Equal(expected, order, "middleware should execute in correct order")
}

// TestQueryParam tests query parameters
func (s *AppTestSuite) TestQueryParam() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/search", func(c *gin.Context) {
			q := c.Query("q")
			c.JSON(http.StatusOK, gin.H{"query": q})
		})
	})

	req := httptest.NewRequest("GET", "/search?q=test", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)

	s.Equal(http.StatusOK, w.Code)
	s.Contains(w.Body.String(), "test")
}

// TestPathParam tests path parameters
func (s *AppTestSuite) TestPathParam() {
	app := New()

	app.RegisterRoutes(func(e *gin.Engine) {
		e.GET("/users/:id", func(c *gin.Context) {
			id := c.Param("id")
			c.JSON(http.StatusOK, gin.H{"user_id": id})
		})
	})

	req := httptest.NewRequest("GET", "/users/123", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)

	s.Equal(http.StatusOK, w.Code)
	s.Contains(w.Body.String(), "123")
}

// TestNotFound tests 404 handling
func (s *AppTestSuite) TestNotFound() {
	app := New()

	req := httptest.NewRequest("GET", "/nonexistent", nil)
	w := httptest.NewRecorder()
	app.engine.ServeHTTP(w, req)

	s.Equal(http.StatusNotFound, w.Code)
}

// TestAppRunSuite runs the test suite
func TestAppRunSuite(t *testing.T) {
	suite.Run(t, new(AppTestSuite))
}