// Command legacymove clears wiki/sources/ of the retired layout (hyperguild
// #209). Default is a dry run that prints the plan; -apply performs it after
// archiving every page it touches; -rollback restores from an archive.
package main

import (
	"flag"
	"fmt"
	"log/slog"
	"os"
	"strings"
	"time"

	"github.com/mathiasbq/hyperguild/ingestion/internal/legacymove"
)

func main() {
	brain := flag.String("brain", "/var/lib/supervisor/brain", "brain directory")
	wing := flag.String("wing", "web-clip", "wing that receives video and article sources")
	apply := flag.Bool("apply", false, "perform the plan (default: dry run)")
	rollback := flag.String("rollback", "", "restore from this archive dir (brain-relative, e.g. archive/wing-migration-2026-10-20)")
	flag.Parse()

	if err := run(*brain, *wing, *apply, *rollback); err != nil {
		slog.Error("legacymove", "err", err)
		os.Exit(1)
	}
}

func run(brain, wing string, apply bool, rollback string) error {
	if rollback != "" {
		if err := legacymove.Rollback(brain, rollback); err != nil {
			return err
		}
		fmt.Println("rolled back from", rollback)
		return nil
	}
	items, err := legacymove.Plan(brain, wing)
	if err != nil {
		return err
	}
	counts := map[legacymove.Action]int{}
	for _, it := range items {
		counts[it.Action]++
	}
	fmt.Printf("# legacy source plan\n\n%d pages: %d move, %d delete, %d left\n\n", len(items), counts[legacymove.Move], counts[legacymove.Delete], counts[legacymove.Skip])
	fmt.Println("| action | from | to | why |")
	fmt.Println("|---|---|---|---|")
	for _, it := range items {
		fmt.Printf("| %s | %s | %s | %s |\n", it.Action, it.From, it.To, strings.ReplaceAll(it.Reason, "|", "/"))
	}
	if !apply {
		fmt.Println("\n_dry run: nothing was changed_")
		return nil
	}
	res, err := legacymove.Apply(brain, items, time.Now())
	fmt.Printf("\nmoved %d, deleted %d; archive: %s\n", res.Moved, res.Deleted, res.ArchiveDir)
	return err
}