// Copyright 2022 Harness Inc. All rights reserved.
// Use of this source code is governed by the Polyform Free Trial License
// that can be found in the LICENSE.md file for this repository.

package pullreq

import (
	"context"

	apiauth "github.com/harness/gitness/internal/api/auth"
	"github.com/harness/gitness/internal/api/usererror"
	"github.com/harness/gitness/internal/auth"
	"github.com/harness/gitness/types"
	"github.com/harness/gitness/types/enum"
)

// Find returns a pull request from the provided repository.
func (c *Controller) Find(ctx context.Context, session *auth.Session, repoRef string, pullreqNum int64) (*types.PullReq, error) {
	if repoRef == "" {
		return nil, usererror.BadRequest("A valid repository reference must be provided.")
	}

	if pullreqNum <= 0 {
		return nil, usererror.BadRequest("A valid pull request number must be provided.")
	}

	repo, err := c.repoStore.FindRepoFromRef(ctx, repoRef)
	if err != nil {
		return nil, err
	}

	if err = apiauth.CheckRepo(ctx, c.authorizer, session, repo, enum.PermissionRepoView, false); err != nil {
		return nil, err
	}

	pr, err := c.pullreqStore.FindByNumber(ctx, repo.ID, pullreqNum)
	if err != nil {
		return nil, err
	}

	return pr, nil
}