package hws_test

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

	"git.haelnorr.com/h/golib/hws"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func Test_Server_Addr(t *testing.T) {
	server, err := hws.NewServer(&hws.Config{
		Host: "192.168.1.1",
		Port: 8080,
	})
	require.NoError(t, err)

	addr := server.Addr()
	assert.Equal(t, "192.168.1.1:8080", addr)
}

func Test_Server_Handler(t *testing.T) {
	var buf bytes.Buffer
	server := createTestServer(t, &buf)

	// Add routes first
	handler := testHandler
	err := server.AddRoutes(hws.Route{
		Path:    "/test",
		Method:  hws.MethodGET,
		Handler: handler,
	})
	require.NoError(t, err)

	// Get the handler
	h := server.Handler()
	require.NotNil(t, h)

	// Test the handler directly with httptest
	req := httptest.NewRequest("GET", "/test", nil)
	rr := httptest.NewRecorder()
	h.ServeHTTP(rr, req)

	assert.Equal(t, 200, rr.Code)
	assert.Equal(t, "hello world", rr.Body.String())
}

func Test_LoggerIgnorePaths_Integration(t *testing.T) {
	var buf bytes.Buffer
	server := createTestServer(t, &buf)

	// Add routes
	err := server.AddRoutes(hws.Route{
		Path:    "/test",
		Method:  hws.MethodGET,
		Handler: testHandler,
	}, hws.Route{
		Path:    "/ignore",
		Method:  hws.MethodGET,
		Handler: testHandler,
	})
	require.NoError(t, err)

	// Set paths to ignore
	server.LoggerIgnorePaths("/ignore", "/healthz")

	err = server.AddMiddleware()
	require.NoError(t, err)

	// Test that ignored path doesn't generate logs
	buf.Reset()
	req := httptest.NewRequest("GET", "/ignore", nil)
	rr := httptest.NewRecorder()
	server.Handler().ServeHTTP(rr, req)

	// Buffer should be empty for ignored path
	assert.Empty(t, buf.String())

	// Test that non-ignored path generates logs
	buf.Reset()
	req = httptest.NewRequest("GET", "/test", nil)
	rr = httptest.NewRecorder()
	server.Handler().ServeHTTP(rr, req)

	// Buffer should have logs for non-ignored path
	assert.NotEmpty(t, buf.String())
}

func Test_WrappedWriter(t *testing.T) {
	var buf bytes.Buffer
	server := createTestServer(t, &buf)

	// Add routes with different status codes
	err := server.AddRoutes(
		hws.Route{
			Path:    "/ok",
			Method:  hws.MethodGET,
			Handler: testHandler,
		},
		hws.Route{
			Path:   "/created",
			Method: hws.MethodPOST,
			Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				w.WriteHeader(201)
				w.Write([]byte("created"))
			}),
		},
	)
	require.NoError(t, err)

	err = server.AddMiddleware()
	require.NoError(t, err)

	// Test OK status
	req := httptest.NewRequest("GET", "/ok", nil)
	rr := httptest.NewRecorder()
	server.Handler().ServeHTTP(rr, req)
	assert.Equal(t, 200, rr.Code)

	// Test Created status
	req = httptest.NewRequest("POST", "/created", nil)
	rr = httptest.NewRecorder()
	server.Handler().ServeHTTP(rr, req)
	assert.Equal(t, 201, rr.Code)
}

func Test_Start_Errors(t *testing.T) {
	t.Run("Start fails when AddRoutes not called", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.Start(t.Context())
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "Server.AddRoutes must be run before starting the server")
	})

	t.Run("Start fails with nil context", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.AddRoutes(hws.Route{
			Path:    "/test",
			Method:  hws.MethodGET,
			Handler: testHandler,
		})
		require.NoError(t, err)

		err = server.Start(t.Context())
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "Context cannot be nil")
	})
}

func Test_Shutdown_Errors(t *testing.T) {
	t.Run("Shutdown fails with nil context", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		startTestServer(t, server)
		<-server.Ready()

		err := server.Shutdown(t.Context())
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "Context cannot be nil")

		// Clean up
		server.Shutdown(t.Context())
	})

	t.Run("Shutdown fails when server not running", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.Shutdown(t.Context())
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "Server isn't running")
	})
}

func Test_WaitUntilReady_ContextCancelled(t *testing.T) {
	t.Run("Context cancelled before server ready", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.AddRoutes(hws.Route{
			Path:    "/test",
			Method:  hws.MethodGET,
			Handler: testHandler,
		})
		require.NoError(t, err)

		// Create a context with a very short timeout
		ctx, cancel := context.WithTimeout(t.Context(), 1)
		defer cancel()

		// Start should return with context error since timeout is so short
		err = server.Start(ctx)

		// The error could be nil if server started very quickly, or context.DeadlineExceeded
		// This tests the ctx.Err() path in waitUntilReady
		if err != nil {
			assert.Equal(t, context.DeadlineExceeded, err)
		}
	})
}