package logging

import (
	"log/slog"
	"os"
)

// Setup initialises the application-wide structured logger.
// All output goes to stdout as JSON for easy parsing by Docker / log aggregators.
func Setup() {
	handler := slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
		Level: slog.LevelInfo,
	})
	slog.SetDefault(slog.New(handler))
}

// TaskLogger returns a logger pre-populated with common task fields.
// Usage: logging.TaskLogger(taskUUID, threadID, messageID).Info("message", ...)
func TaskLogger(taskUUID, threadID, messageID string) *slog.Logger {
	return slog.With(
		"task_uuid", taskUUID,
		"thread_id", threadID,
		"message_id", messageID,
	)
}