// 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"
)

// CmdStackReorder stores a validated, already-linked PR branch order.
var CmdStackReorder = cli.Command{
	Name: "reorder", Usage: "Reorder PRs after their branches have been rebased",
	ArgsUsage: "<stack id> <pull index> <pull index> [more pull indices]",
	Flags:     flags.AllDefaultFlags, Action: RunStackReorder,
}

func RunStackReorder(requestCtx stdctx.Context, cmd *cli.Command) error {
	if cmd.Args().Len() < 3 {
		return fmt.Errorf("stack id and at least two pull numbers are required")
	}
	stackID, err := utils.ArgToIndex(cmd.Args().Get(0))
	if err != nil {
		return err
	}
	indices := make([]int64, 0, cmd.Args().Len()-1)
	for i := 1; i < cmd.Args().Len(); i++ {
		index, err := utils.ArgToIndex(cmd.Args().Get(i))
		if err != nil {
			return err
		}
		indices = append(indices, index)
	}
	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.ReorderPullStack(requestCtx, ctx.Login, ctx.Owner, ctx.Repo, stackID, indices); err != nil {
		return err
	}
	fmt.Fprintf(ctx.Writer, "reordered stack #%d\n", stackID)
	return nil
}