// Command agentvault runs deterministic Vault flows for agents in a single
// invocation, so credentials are never plumbed through a shell. It authenticates
// with the same Vault AppRole as agentpr (role_id only, no secret_id).
//
//	agentvault seed-outpost --outpost <name> --dest-path <kv/path>
//	agentvault seed-oauth --path <kv/path> --client-id <id>
package main

import (
	"fmt"
	"os"
	"strings"

	"git.unkin.net/unkin/agent-tools/internal/agent"

	"github.com/spf13/cobra"
)

var version = "dev"

func main() {
	if err := newRootCmd().Execute(); err != nil {
		os.Exit(1)
	}
}

// newRootCmd builds the agentvault command tree. Separated from main so tests
// can execute it against httptest servers.
func newRootCmd() *cobra.Command {
	root := &cobra.Command{
		Use:          "agentvault",
		Short:        "Run deterministic Vault flows as the agent AppRole.",
		Long:         "agentvault performs self-contained Vault flows for agents: it logs in with the\nagent AppRole and moves secret material between systems without ever printing it.",
		Version:      version,
		SilenceUsage: true,
	}
	root.SetVersionTemplate("{{.Version}}\n")
	root.AddCommand(newSeedOutpostCmd(), newSeedOAuthCmd(), newVersionCmd())
	return root
}

func newSeedOutpostCmd() *cobra.Command {
	opts := agent.SeedOutpostOptions{}
	cmd := &cobra.Command{
		Use:   "seed-outpost",
		Short: "Copy an Authentik outpost token into Vault KV",
		Long: "Read the Authentik API token from Vault KV, resolve the named outpost's\n" +
			"token_identifier, fetch its key and write it to a Vault KV path. Re-running\n" +
			"writes a new KV version. The token value is never printed or logged.",
		SilenceUsage: true,
		RunE: func(cmd *cobra.Command, args []string) error {
			opts.VaultAddr = agent.VaultAddr()
			opts.RoleID = agent.RoleID()
			res, err := agent.SeedOutpost(opts)
			if err != nil {
				return err
			}
			out := cmd.OutOrStdout()
			_, _ = fmt.Fprintf(out, "outpost:          %s\n", res.Outpost)
			_, _ = fmt.Fprintf(out, "token_identifier: %s\n", res.TokenIdentifier)
			_, _ = fmt.Fprintf(out, "dest:             %s/%s\n", res.KVMount, res.DestPath)
			_, _ = fmt.Fprintf(out, "version:          %d\n", res.Version)
			return nil
		},
	}
	f := cmd.Flags()
	f.StringVar(&opts.Outpost, "outpost", "", "Authentik outpost name (required)")
	f.StringVar(&opts.DestPath, "dest-path", "", "KV-v2 path to write the token to, e.g. kubernetes/namespace/authentik/default/outpost-token (required)")
	f.StringVar(&opts.DestKey, "dest-key", agent.DefaultDestKey, "Field to write the token under")
	f.StringVar(&opts.KVMount, "kv-mount", agent.DefaultKVMount, "KV-v2 mount holding both the API token and the destination")
	f.StringVar(&opts.TokenPath, "token-path", agent.DefaultOutpostTokenPath, "KV-v2 path of the Authentik API token")
	f.StringVar(&opts.AuthentikURL, "authentik-url", agent.AuthentikURL(), "Authentik base URL")
	_ = cmd.MarkFlagRequired("outpost")
	_ = cmd.MarkFlagRequired("dest-path")
	return cmd
}

func newSeedOAuthCmd() *cobra.Command {
	opts := agent.SeedOAuthOptions{}
	cmd := &cobra.Command{
		Use:   "seed-oauth",
		Short: "Seed an oauth2-proxy credential set into Vault KV",
		Long: "Make a Vault KV-v2 path hold a complete oauth2-proxy credential set: the\n" +
			"given client_id, plus a client_secret and a 32-byte cookie_secret that are\n" +
			"generated only when missing (or with --rotate). Existing keys are preserved\n" +
			"and nothing is written when the secret is already correct. Secret values are\n" +
			"never printed or logged.",
		SilenceUsage: true,
		RunE: func(cmd *cobra.Command, args []string) error {
			opts.VaultAddr = agent.VaultAddr()
			opts.RoleID = agent.RoleID()
			res, err := agent.SeedOAuth(opts)
			if err != nil {
				return err
			}
			out := cmd.OutOrStdout()
			_, _ = fmt.Fprintf(out, "path:          %s/%s\n", res.KVMount, res.Path)
			_, _ = fmt.Fprintf(out, "keys:          %s\n", strings.Join(res.KeyNames(), ", "))
			for _, k := range res.Keys {
				_, _ = fmt.Fprintf(out, "  %-14s %s\n", k.Name+":", k.Action)
			}
			if res.Changed {
				_, _ = fmt.Fprintf(out, "version:       %d\n", res.Version)
			} else {
				_, _ = fmt.Fprintf(out, "version:       unchanged\n")
			}
			return nil
		},
	}
	f := cmd.Flags()
	f.StringVar(&opts.Path, "path", "", "KV-v2 path holding the credentials, e.g. kubernetes/namespace/repospawner/default/oauth-credentials (required)")
	f.StringVar(&opts.ClientID, "client-id", "", "OIDC client id to store (required)")
	f.StringVar(&opts.KVMount, "kv-mount", agent.DefaultKVMount, "KV-v2 mount holding the path")
	f.BoolVar(&opts.Rotate, "rotate", false, "Regenerate client_secret and cookie_secret even when they already exist")
	_ = cmd.MarkFlagRequired("path")
	_ = cmd.MarkFlagRequired("client-id")
	return cmd
}

func newVersionCmd() *cobra.Command {
	return &cobra.Command{
		Use:          "version",
		Short:        "Print the version",
		Run:          func(cmd *cobra.Command, args []string) { fmt.Println(version) },
		SilenceUsage: true,
	}
}