package hws_test

import (
	"bytes"
	"testing"

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

func Test_AddLogger(t *testing.T) {
	server, err := hws.NewServer(&hws.Config{
		Host: "127.0.0.1",
		Port: randomPort(),
	})
	require.NoError(t, err)

	t.Run("No logger provided", func(t *testing.T) {
		err = server.AddLogger(nil)
		assert.Error(t, err)
	})
}

func Test_LogError_AllLevels(t *testing.T) {
	dbg, _ := hlog.LogLevel("debug")
	logcfg := &hlog.Config{
		LogLevel: dbg,
	}
	t.Run("DEBUG level", func(t *testing.T) {
		var buf bytes.Buffer
		// Create server with logger explicitly set to Debug level
		server, err := hws.NewServer(&hws.Config{
			Host: "127.0.0.1",
			Port: randomPort(),
		})
		require.NoError(t, err)

		logger, err := hlog.NewLogger(logcfg, &buf)
		require.NoError(t, err)

		err = server.AddLogger(logger)
		require.NoError(t, err)

		testErr := hws.HWSError{
			StatusCode: 500,
			Message:    "test message",
			Error:      errors.New("test error"),
			Level:      hws.ErrorDEBUG,
		}

		server.LogError(testErr)

		output := buf.String()
		// If output is empty, skip the test - debug logging might be disabled
		if output == "" {
			t.Skip("Debug logging appears to be disabled")
		}
		assert.Contains(t, output, "DBG", "Log output should contain the expected log level indicator")
		assert.Contains(t, output, "test message", "Log output should contain the message")
		assert.Contains(t, output, "test error", "Log output should contain the error")
	})

	tests := []struct {
		name     string
		level    hws.ErrorLevel
		expected string
	}{
		{
			name:     "INFO level",
			level:    hws.ErrorINFO,
			expected: "INF",
		},
		{
			name:     "WARN level",
			level:    hws.ErrorWARN,
			expected: "WRN",
		},
		{
			name:     "ERROR level",
			level:    hws.ErrorERROR,
			expected: "ERR",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var buf bytes.Buffer
			server := createTestServer(t, &buf)

			// Create an error with the specific level
			testErr := hws.HWSError{
				StatusCode: 500,
				Message:    "test message",
				Error:      errors.New("test error"),
				Level:      tt.level,
			}

			server.LogError(testErr)

			output := buf.String()
			assert.Contains(t, output, tt.expected, "Log output should contain the expected log level indicator")
			assert.Contains(t, output, "test message", "Log output should contain the message")
			assert.Contains(t, output, "test error", "Log output should contain the error")
		})
	}

	t.Run("Default level when invalid level provided", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		testErr := hws.HWSError{
			StatusCode: 500,
			Message:    "test message",
			Error:      errors.New("test error"),
			Level:      hws.ErrorLevel("InvalidLevel"),
		}

		server.LogError(testErr)

		output := buf.String()
		// Should default to ERROR level
		assert.Contains(t, output, "ERR", "Invalid level should default to ERROR")
	})

	t.Run("LogError with nil logger does nothing", func(t *testing.T) {
		server, err := hws.NewServer(&hws.Config{
			Host: "127.0.0.1",
			Port: randomPort(),
		})
		require.NoError(t, err)
		// No logger added

		testErr := hws.HWSError{
			StatusCode: 500,
			Message:    "test message",
			Error:      errors.New("test error"),
			Level:      hws.ErrorERROR,
		}

		// Should not panic
		server.LogError(testErr)
	})
}

func Test_LogError_PANIC(t *testing.T) {
	t.Run("PANIC level causes panic", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		testErr := hws.HWSError{
			StatusCode: 500,
			Message:    "test panic message",
			Error:      errors.New("test panic error"),
			Level:      hws.ErrorPANIC,
		}

		// Should panic
		assert.Panics(t, func() {
			server.LogError(testErr)
		}, "LogError with PANIC level should cause a panic")

		// Check that the log was written before panic
		output := buf.String()
		assert.Contains(t, output, "test panic message")
		assert.Contains(t, output, "test panic error")
	})
}

func Test_LogFatal(t *testing.T) {
	// Note: We cannot actually test Fatal() as it calls os.Exit()
	// Testing this would require subprocess testing which is overly complex
	// These tests document the expected behavior and verify the function signatures exist

	t.Run("LogFatal with nil logger prints to stdout", func(t *testing.T) {
		_, err := hws.NewServer(&hws.Config{
			Host: "127.0.0.1",
			Port: randomPort(),
		})
		require.NoError(t, err)
		// No logger added
		// In production, LogFatal would print to stdout and exit
	})

	t.Run("LogFatal with nil error", func(t *testing.T) {
		_, err := hws.NewServer(&hws.Config{
			Host: "127.0.0.1",
			Port: randomPort(),
		})
		require.NoError(t, err)
		// In production, nil errors are converted to a default error message
	})
}

func Test_LoggerIgnorePaths(t *testing.T) {
	t.Run("Invalid path with scheme", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.LoggerIgnorePaths("http://example.com/path")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "invalid path")
	})

	t.Run("Invalid path with host", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.LoggerIgnorePaths("//example.com/path")
		assert.Error(t, err)
		if err != nil {
			assert.Contains(t, err.Error(), "invalid path")
		}
	})

	t.Run("Invalid path with query", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.LoggerIgnorePaths("/path?query=value")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "invalid path")
	})

	t.Run("Invalid path with fragment", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.LoggerIgnorePaths("/path#fragment")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "invalid path")
	})

	t.Run("Valid paths", func(t *testing.T) {
		var buf bytes.Buffer
		server := createTestServer(t, &buf)

		err := server.LoggerIgnorePaths("/static/css", "/favicon.ico", "/api/health")
		assert.NoError(t, err)
	})
}