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

package stack

import (
	stdctx "context"
	"encoding/json"
	"fmt"

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

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

// CmdStackShow represents a sub command to show a pull request stack
var CmdStackShow = cli.Command{
	Name:        "show",
	Aliases:     []string{"get"},
	Usage:       "Show a pull request stack",
	Description: "Show a pull request stack, its base branch and its ordered pull requests",
	ArgsUsage:   "<stack id>",
	Action:      RunStackShow,
	Flags:       flags.AllDefaultFlags,
}

// RunStackShow shows a pull request stack
func RunStackShow(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
	}

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

	if ctx.String("output") == "json" {
		encoder := json.NewEncoder(ctx.Writer)
		encoder.SetIndent("", "\t")
		return encoder.Encode(s)
	}

	print.PullStackDetail(s)
	return nil
}