package masterlog

import (
	"io"
	"os"
)

// isTerminal checks if the writer is a terminal (TTY)
func isTerminal(w io.Writer) bool {
	file, ok := w.(*os.File)
	if !ok {
		return false
	}

	// Check if it's a terminal by trying to get file info
	stat, err := file.Stat()
	if err != nil {
		return false
	}

	// Check if it's a character device (terminal)
	return (stat.Mode() & os.ModeCharDevice) != 0
}

// ConsoleWriter writes to stdout
type ConsoleWriter struct {
	writer     io.Writer
	isTerminal bool
}

func NewConsoleWriter() *ConsoleWriter {
	writer := os.Stdout
	return &ConsoleWriter{
		writer:     writer,
		isTerminal: isTerminal(writer),
	}
}

func (w *ConsoleWriter) Write(data []byte) error {
	_, err := w.writer.Write(data)
	return err
}

func (w *ConsoleWriter) Close() error {
	return nil
}

func (w *ConsoleWriter) SupportsColors() bool {
	return w.isTerminal
}

// FileWriter writes to a file
type FileWriter struct {
	file   *os.File
	writer io.Writer
}

func NewFileWriter(filename string) (*FileWriter, error) {
	file, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		return nil, err
	}

	return &FileWriter{
		file:   file,
		writer: file,
	}, nil
}

func (w *FileWriter) Write(data []byte) error {
	_, err := w.writer.Write(data)
	return err
}

func (w *FileWriter) Close() error {
	if w.file != nil {
		return w.file.Close()
	}
	return nil
}

func (w *FileWriter) SupportsColors() bool {
	return false // File writers never support colors
}