package logging

import (
    "fmt"
    "os"
    "path/filepath"
    "time"

    "github.com/charmbracelet/log"
)

func NewSessionLogger() (*log.Logger, *os.File, error) {
    home, err := os.UserHomeDir()
    if err != nil {
        return nil, nil, fmt.Errorf("home dir: %w", err)
    }
    logDir := filepath.Join(home, ".config", "ai-agent", "logs")
    if err := os.MkdirAll(logDir, 0o755); err != nil {
        return nil, nil, fmt.Errorf("create log dir: %w", err)
    }
    filename := time.Now().Format("2006-01-02_15-04-05") + ".log"
    f, err := os.Create(filepath.Join(logDir, filename))
    if err != nil {
        return nil, nil, fmt.Errorf("create log file: %w", err)
    }
    logger := log.NewWithOptions(f, log.Options{
        ReportTimestamp: true,
        TimeFormat:      time.RFC3339,
        Prefix:          "ai-agent",
        Level:           log.DebugLevel,
    })
    return logger, f, nil
}