package main

import (
	"context"
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
)

// systemLegacyRoutesVerb is the line carlos system's usage puts under the
// legacy-routes assign verb.
const systemLegacyRoutesVerb = "say which account and app the routes an operator filed by hand belong to"

// runSystemLegacyRoutesVerb is `carlos system legacy-routes assign`
// (seeded-instances spec §6.4): which account and app the routes an
// operator filed by hand under the operator account belong to.
func runSystemLegacyRoutesVerb(rest []string) {
	if len(rest) == 0 || rest[0] != "assign" {
		systemUsage()
		os.Exit(2)
	}
	fs := flag.NewFlagSet("system legacy-routes assign", flag.ExitOnError)
	consoleFlag := consoleOption(fs, "console origin (default: the only logged-in one)")
	name := fs.String("name", "", "the app name the legacy routes are filed under, in the operator account")
	to := fs.String("to", "", "the account and app they belong to, as <account>/<app>")
	fs.Parse(rest[1:])
	if *name == "" || *to == "" || fs.NArg() != 0 {
		fs.Usage()
		os.Exit(2)
	}
	sess := requireDeployAPISession(*consoleFlag)
	printUsing(stdout, sess)
	status, body, err := sess.postJSON(context.Background(), "/api/cli/system/legacy-routes", map[string]string{"name": *name, "to": *to})
	if err != nil {
		log.Fatalf("carlos system legacy-routes assign: %v", err)
	}
	if status != http.StatusOK {
		log.Fatalf("carlos system legacy-routes assign: %v", apiErrorFromBody(status, body))
	}
	var out struct {
		Name    string `json:"name"`
		Account string `json:"account"`
		App     string `json:"app"`
	}
	if err := json.Unmarshal(body, &out); err != nil {
		log.Fatalf("carlos system legacy-routes assign: unreadable response: %v", err)
	}
	fmt.Fprintln(stdout, fmt.Sprintf("assigned the legacy routes named %s to %s/%s", out.Name, out.Account, out.App))
}