// Package cli is the bsdaily command line: the command, its flags, the
// rules for combining them and the dates they name. The extraction itself
// is in package bsdaily.
package cli

import (
	"log/slog"
	"os"

	"git.eeqj.de/sneak/bsdaily/internal/bsdaily"
	"github.com/spf13/cobra"
)

// Main runs the bsdaily command on the program's command-line arguments
// and returns the status for the process to exit with. version is the
// build's version; an empty one is reported as dev.
func Main(version string) int {
	if version == "" {
		version = "dev"
	}

	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
		Level: slog.LevelInfo,
	}))
	slog.SetDefault(logger)

	var dateFlag, fromFlag, toFlag string

	rootCmd := &cobra.Command{
		Use:          "bsdaily",
		Short:        "Extract a single day's data from the latest daily snapshot",
		Version:      version,
		SilenceUsage: true,
		RunE: func(_ *cobra.Command, _ []string) error {
			slog.Info("starting", "version", version)

			targetDates, err := ParseTargetDates(dateFlag, fromFlag, toFlag)
			if err != nil {
				return err
			}

			err = bsdaily.Run(targetDates)
			if err != nil {
				return err
			}

			slog.Info("completed successfully")

			return nil
		},
	}

	rootCmd.Flags().StringVarP(&dateFlag, "date", "d", "",
		"target date to extract (YYYY-MM-DD); "+
			"defaults to snapshot date minus one day")
	rootCmd.Flags().StringVar(&fromFlag, "from", "",
		"start of date range to extract (YYYY-MM-DD, inclusive); use with --to")
	rootCmd.Flags().StringVar(&toFlag, "to", "",
		"end of date range to extract (YYYY-MM-DD, inclusive); use with --from")

	err := rootCmd.Execute()
	if err != nil {
		return 1
	}

	return 0
}