package simplelog

import (
	"context"
	"encoding/json"
	"fmt"
	"log/slog"
	"os"
)

type JSONHandler struct {
	attrs handlerAttrs
}

func NewJSONHandler() *JSONHandler {
	return &JSONHandler{}
}

func (j *JSONHandler) Handle(ctx context.Context, record slog.Record) error {
	jsonData, err := json.Marshal(recordToMap(record, j.attrs))
	if err != nil {
		return fmt.Errorf("error marshaling log record: %w", err)
	}
	fmt.Fprintln(os.Stdout, string(jsonData))
	return nil
}

func (j *JSONHandler) Enabled(ctx context.Context, level slog.Level) bool {
	return true
}

func (j *JSONHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
	if len(attrs) == 0 {
		return j
	}
	return &JSONHandler{attrs: j.attrs.withAttrs(attrs)}
}

func (j *JSONHandler) WithGroup(name string) slog.Handler {
	if name == "" {
		return j
	}
	return &JSONHandler{attrs: j.attrs.withGroup(name)}
}