package api

import (
	"bytes"
	"net/http"
	"net/http/httptest"

	"github.com/gin-gonic/gin"
	. "gopkg.in/check.v1"
)

type DBTestSuite struct {
	router *gin.Engine
}

var _ = Suite(&DBTestSuite{})

func (s *DBTestSuite) SetUpTest(c *C) {
	s.router = gin.New()
	s.router.POST("/api/db/cleanup", apiDBCleanup)

	gin.SetMode(gin.TestMode)
}

func (s *DBTestSuite) TestDbCleanupStructure(c *C) {
	// Test database cleanup endpoint structure
	req, _ := http.NewRequest("POST", "/api/db/cleanup", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Will likely error due to no database context, but tests structure
	c.Check(w.Code, Not(Equals), 200) // Expect error due to missing context
}

func (s *DBTestSuite) TestDbCleanupWithAsync(c *C) {
	// Test database cleanup with async parameter
	req, _ := http.NewRequest("POST", "/api/db/cleanup?_async=1", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Will error due to no context, but tests async parameter parsing
	c.Check(w.Code, Not(Equals), 200)
}

func (s *DBTestSuite) TestDbCleanupWithDryRun(c *C) {
	// Test database cleanup with dry run parameter
	req, _ := http.NewRequest("POST", "/api/db/cleanup?dry-run=1", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Will error due to no context, but tests parameter parsing
	c.Check(w.Code, Not(Equals), 200)
}

func (s *DBTestSuite) TestDbCleanupWithBothParams(c *C) {
	// Test database cleanup with both async and dry-run parameters
	req, _ := http.NewRequest("POST", "/api/db/cleanup?_async=1&dry-run=1", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Will error due to no context, but tests parameter combination
	c.Check(w.Code, Not(Equals), 200)
}

func (s *DBTestSuite) TestDbCleanupHTTPMethods(c *C) {
	// Test that only POST method is allowed
	deniedMethods := []string{"GET", "PUT", "DELETE", "PATCH", "HEAD", "OPTIONS"}

	for _, method := range deniedMethods {
		req, _ := http.NewRequest(method, "/api/db/cleanup", nil)
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		c.Check(w.Code, Equals, 404, Commentf("Method: %s should be denied", method))
	}
}

func (s *DBTestSuite) TestDbCleanupWithRequestBody(c *C) {
	// Test database cleanup with various request bodies (should be ignored)
	testBodies := []string{
		"",
		"some random text",
		`{"key": "value"}`,
		`<xml>data</xml>`,
		"binary\x00\x01\x02data",
	}

	for i, body := range testBodies {
		req, _ := http.NewRequest("POST", "/api/db/cleanup", bytes.NewBufferString(body))
		req.Header.Set("Content-Type", "application/json")
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// Should handle various body content without crashing
		c.Check(w.Code, Not(Equals), 0, Commentf("Body test #%d", i+1))
	}
}

func (s *DBTestSuite) TestDbCleanupParameterVariations(c *C) {
	// Test various parameter value combinations
	paramTests := []struct {
		query       string
		description string
	}{
		{"", "no parameters"},
		{"_async=0", "async disabled"},
		{"_async=false", "async false"},
		{"_async=true", "async true"},
		{"dry-run=0", "dry-run disabled"},
		{"dry-run=false", "dry-run false"},
		{"dry-run=true", "dry-run true"},
		{"_async=1&dry-run=0", "async on, dry-run off"},
		{"_async=0&dry-run=1", "async off, dry-run on"},
		{"_async=true&dry-run=false", "async true, dry-run false"},
		{"unknown=param", "unknown parameter"},
		{"_async=invalid", "invalid async value"},
		{"dry-run=invalid", "invalid dry-run value"},
	}

	for _, test := range paramTests {
		path := "/api/db/cleanup"
		if test.query != "" {
			path += "?" + test.query
		}

		req, _ := http.NewRequest("POST", path, nil)
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// Should handle all parameter variations without crashing
		c.Check(w.Code, Not(Equals), 0, Commentf("Test: %s", test.description))
	}
}

func (s *DBTestSuite) TestDbCleanupContentTypes(c *C) {
	// Test different content types
	contentTypes := []string{
		"",
		"application/json",
		"text/plain",
		"application/x-www-form-urlencoded",
		"multipart/form-data",
		"application/octet-stream",
	}

	for _, contentType := range contentTypes {
		req, _ := http.NewRequest("POST", "/api/db/cleanup", nil)
		if contentType != "" {
			req.Header.Set("Content-Type", contentType)
		}
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// Should handle different content types without crashing
		c.Check(w.Code, Not(Equals), 0, Commentf("Content-Type: %s", contentType))
	}
}

func (s *DBTestSuite) TestDbCleanupErrorHandling(c *C) {
	// Test various error conditions
	errorTests := []struct {
		description string
		path        string
		method      string
		expectError bool
	}{
		{"Normal cleanup call", "/api/db/cleanup", "POST", true}, // Expect error due to no context
		{"Cleanup with extra path", "/api/db/cleanup/extra", "POST", false}, // Route not matched
		{"Cleanup with trailing slash", "/api/db/cleanup/", "POST", false}, // Route not matched
		{"Case sensitive path", "/api/DB/cleanup", "POST", false}, // Route not matched
		{"Case sensitive path", "/api/db/CLEANUP", "POST", false}, // Route not matched
	}

	for _, test := range errorTests {
		req, _ := http.NewRequest(test.method, test.path, nil)
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// All should return some response without crashing
		c.Check(w.Code, Not(Equals), 0, Commentf("Test: %s", test.description))
	}
}

func (s *DBTestSuite) TestDbCleanupReliability(c *C) {
	// Test multiple sequential calls for reliability
	for i := 0; i < 5; i++ {
		req, _ := http.NewRequest("POST", "/api/db/cleanup", nil)
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// Should be consistent across multiple calls
		c.Check(w.Code, Not(Equals), 0, Commentf("Call #%d", i+1))
	}
}

func (s *DBTestSuite) TestDbCleanupHeaders(c *C) {
	// Test with various HTTP headers
	headerTests := []map[string]string{
		{},
		{"Accept": "application/json"},
		{"Accept": "text/plain"},
		{"Accept": "*/*"},
		{"User-Agent": "test-agent"},
		{"Authorization": "Bearer token123"},
		{"X-Custom-Header": "custom-value"},
		{"Accept-Encoding": "gzip, deflate"},
		{"Accept-Language": "en-US,en;q=0.9"},
	}

	for i, headers := range headerTests {
		req, _ := http.NewRequest("POST", "/api/db/cleanup", nil)
		for key, value := range headers {
			req.Header.Set(key, value)
		}
		w := httptest.NewRecorder()
		s.router.ServeHTTP(w, req)

		// Should handle various headers without crashing
		c.Check(w.Code, Not(Equals), 0, Commentf("Header test #%d", i+1))
	}
}

func (s *DBTestSuite) TestDbCleanupResponseFormat(c *C) {
	// Test response format consistency
	req, _ := http.NewRequest("POST", "/api/db/cleanup", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Should have proper response structure
	c.Check(w.Code, Not(Equals), 0)
	c.Check(w.Header(), NotNil)
	
	// If there's a response body, it should be valid
	if w.Body.Len() > 0 {
		body := w.Body.String()
		c.Check(len(body), Not(Equals), 0)
	}
}