// Copyright 2018 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package models

import "code.gitea.io/gitea/modules/util"

// ReviewType defines the sort of feedback a review gives
type ReviewType int

const (
	// ReviewTypeApprove approves changes
	ReviewTypeApprove ReviewType = iota
	// ReviewTypeComment gives general feedback
	ReviewTypeComment
	// ReviewTypeReject gives feedback blocking merge
	ReviewTypeReject
)

// Review represents collection of code comments giving feedback for a PR
type Review struct {
	ID         int64 `xorm:"pk autoincr"`
	Type       ReviewType
	Pending    bool
	Reviewer   *User  `xorm:"-"`
	ReviewerID int64  `xorm:"index"`
	Issue      *Issue `xorm:"-"`
	IssueID    int64  `xorm:"index"`
	Content    string

	CreatedUnix util.TimeStamp `xorm:"INDEX created"`
	UpdatedUnix util.TimeStamp `xorm:"INDEX updated"`

	// CodeComments are the initial code comments of the review
	CodeComments []*Comment `xorm:"-"`
}

func (r *Review) loadCodeComments(e Engine) (err error) {
	r.CodeComments, err = findComments(e, FindCommentsOptions{IssueID: r.IssueID, ReviewID: r.ID})
	return
}

// LoadCodeComments loads CodeComments
func (r *Review) LoadCodeComments() error {
	return r.loadCodeComments(x)
}

func (r *Review) loadIssue(e Engine) (err error) {
	r.Issue, err = getIssueByID(e, r.IssueID)
	return
}

func (r *Review) loadReviewer(e Engine) (err error) {
	r.Reviewer, err = getUserByID(e, r.ReviewerID)
	return
}

func (r *Review) loadAttributes(e Engine) (err error) {
	if err = r.loadReviewer(e); err != nil {
		return
	}
	if err = r.loadIssue(e); err != nil {
		return
	}
	return
}

// LoadAttributes loads all attributes except CodeComments
func (r *Review) LoadAttributes() error {
	return r.loadAttributes(x)
}

func getReviewByID(e Engine, id int64) (*Review, error) {
	review := new(Review)
	if has, err := e.ID(id).Get(review); err != nil {
		return nil, err
	} else if !has {
		return nil, ErrReviewNotExist{ID: id}
	} else {
		return review, nil
	}
}

// GetReviewByID returns the review by the given ID
func GetReviewByID(id int64) (*Review, error) {
	return getReviewByID(x, id)
}