package main

import (
	"context"
	"encoding/json"
	"errors"
	"flag"
	"fmt"
	"os"
	"path/filepath"
	"time"

	"git.yuntuo.hk/k2safe/orbit/internal/config"
	"git.yuntuo.hk/k2safe/orbit/internal/storage/mysql"
	core "git.yuntuo.hk/k2safe/orbit/model"
)

func main() {
	if err := run(); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}
func run() error {
	if len(os.Args) < 2 || os.Args[1] != "bootstrap" {
		return errors.New("usage: orbit-admin bootstrap (--application NAME | --application-id ID) --namespace NAME --environment NAME --queue NAME --output NEW_FILE")
	}
	flags := flag.NewFlagSet("bootstrap", flag.ContinueOnError)
	var in mysql.BootstrapInput
	var output string
	flags.StringVar(&in.Application, "application", "", "new application name")
	flags.Func("application-id", "existing application id; mutually exclusive with --application", func(v string) error {
		in.ExistingApplicationID = core.ID(v)
		return in.ExistingApplicationID.Validate()
	})
	flags.BoolVar(&in.ResourceAccess, "resource-access", false, "grant application-wide resource read and manage actions")
	flags.StringVar(&in.Namespace, "namespace", "", "new namespace name")
	flags.StringVar(&in.Environment, "environment", "", "environment name")
	flags.StringVar(&in.Queue, "queue", "", "initial queue name")
	flags.StringVar(&output, "output", "", "new private credentials JSON file")
	flags.BoolVar(&in.WorkerAccess, "worker-access", false, "also grant Worker connect and consume actions for development")
	flags.BoolVar(&in.ScheduleAccess, "schedule-access", false, "also grant schedule read and manage actions for development")
	flags.BoolVar(&in.EventAccess, "event-access", false, "also grant result subscription read, manage and consume actions")
	flags.BoolVar(&in.RecoveryAccess, "recovery-access", false, "explicitly grant task review, manual retry and operation audit read actions")
	flags.BoolVar(&in.WorkflowAccess, "workflow-access", false, "explicitly grant workflow definition read and publish actions")
	flags.BoolVar(&in.WorkflowRunAccess, "workflow-run-access", false, "explicitly grant workflow start and read actions")
	flags.BoolVar(&in.WorkflowControlAccess, "workflow-control-access", false, "explicitly grant workflow control and read actions")
	flags.BoolVar(&in.WorkflowSignalAccess, "workflow-signal-access", false, "explicitly grant workflow signal and read actions")
	flags.BoolVar(&in.WorkflowRecoveryAccess, "workflow-recovery-access", false, "explicitly grant workflow recovery and read actions")
	flags.BoolVar(&in.WorkflowAuditAccess, "workflow-audit-access", false, "explicitly grant workflow operation audit read action")
	if err := flags.Parse(os.Args[2:]); err != nil {
		return err
	}
	if flags.NArg() != 0 || output == "" {
		return errors.New("--output and named resource arguments are required")
	}
	cfg, err := config.Load()
	if err != nil {
		return err
	}
	file, err := os.OpenFile(output, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0600)
	if err != nil {
		return errors.New("cannot create new private output file (existing files are never overwritten)")
	}
	defer file.Close()
	delivered := false
	defer func() {
		if !delivered {
			_ = os.Remove(output)
		}
	}()
	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()
	db, err := mysql.Open(ctx, cfg.MySQLDSN, 2, 1)
	if err != nil {
		return err
	}
	defer db.Close()
	err = mysql.Bootstrap(ctx, db, in, func(result mysql.BootstrapResult) error {
		if err := json.NewEncoder(file).Encode(result); err != nil {
			return err
		}
		if err := file.Sync(); err != nil {
			return err
		}
		directory, err := os.Open(filepath.Dir(output))
		if err != nil {
			return err
		}
		err = directory.Sync()
		closeErr := directory.Close()
		if err != nil {
			return err
		}
		if closeErr != nil {
			return closeErr
		}
		delivered = true
		return nil
	})
	if err != nil {
		if delivered {
			return errors.New("bootstrap commit could not be confirmed; private output was retained; verify its credential before retrying")
		}
		return errors.New("bootstrap failed before credential delivery; check schema, names and database access")
	}
	fmt.Println("Bootstrap committed. Credentials saved in the requested private file; valid for 30 days.")
	return nil
}