// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package stack

import (
	stdctx "context"
	"fmt"

	"gitea.dev/tea/cmd/flags"
	"gitea.dev/tea/modules/context"
	"gitea.dev/tea/modules/task"
	"gitea.dev/tea/modules/utils"

	"github.com/urfave/cli/v3"
)

// CmdStackRestack represents a sub command to queue a stack restack
var CmdStackRestack = cli.Command{
	Name:        "restack",
	Usage:       "Queue a pull request stack restack",
	Description: "Retarget every open pull request above a merged one in the stack onto its parent's new base",
	ArgsUsage:   "<stack id>",
	Action:      RunStackRestack,
	Flags:       flags.AllDefaultFlags,
}

// RunStackRestack queues a restack of a pull request stack
func RunStackRestack(requestCtx stdctx.Context, cmd *cli.Command) error {
	if cmd.Args().Len() != 1 {
		return fmt.Errorf("stack id is required")
	}
	id, err := utils.ArgToIndex(cmd.Args().First())
	if err != nil {
		return err
	}

	ctx, err := context.InitCommand(cmd)
	if err != nil {
		return err
	}
	if err := ctx.Ensure(context.CtxRequirement{RemoteRepo: true}); err != nil {
		return err
	}

	if err := task.RestackPullStack(requestCtx, ctx.Login, ctx.Owner, ctx.Repo, id); err != nil {
		return err
	}

	fmt.Fprintf(ctx.Writer, "restack for stack #%d queued\n", id)
	return nil
}