package cmd

import (
	"fmt"

	"github.com/spf13/cobra"

	"go.bigb.es/cacher/internal/config"
)

var initCmd = &cobra.Command{
	Use:   "init",
	Short: "Write ~/.config/cacher/config.toml and verify credentials",
	Long: `Persist cacher's S3 connection settings to ~/.config/cacher/config.toml
so subsequent commands don't need flags or env vars. After writing, runs
the same smoke test as ` + "`cacher doctor`" + ` to fail fast on bad creds.

Auth files (--key-file, --secret-file) are recorded in the config but
not read here — they're read on demand by every subsequent command.
Credentials passed via CACHER_S3_KEY_ID / CACHER_S3_SECRET env vars
take precedence over the files at use time.`,
	RunE: func(cmd *cobra.Command, args []string) error {
		// Build the config we will persist. init does not honour the
		// in-process config file — it always writes a fresh one.
		cfg := config.Defaults()
		if flagEndpoint != "" {
			cfg.Endpoint = flagEndpoint
		}
		if flagRegion != "" {
			cfg.Region = flagRegion
		}
		if flagBucket != "" {
			cfg.Bucket = flagBucket
		}
		if flagPrefix != "" {
			cfg.Prefix = flagPrefix
		}
		if flagKeyFile != "" {
			cfg.KeyFile = flagKeyFile
		}
		if flagSecretFile != "" {
			cfg.SecretFile = flagSecretFile
		}
		switch flagArchSuffix {
		case "true":
			cfg.ArchSuffix = true
		case "false":
			cfg.ArchSuffix = false
		}

		if err := cfg.Validate(); err != nil {
			return err
		}

		path := flagConfigPath
		if path == "" {
			p, err := config.DefaultPath()
			if err != nil {
				return err
			}
			path = p
		}
		if err := config.Save(path, cfg); err != nil {
			return err
		}
		fmt.Fprintf(cmd.OutOrStdout(), "wrote %s\n", path)
		return runDoctor(cmd)
	},
}

func init() {
	addS3Flags(initCmd)
	rootCmd.AddCommand(initCmd)
}