package main

import (
	"bufio"
	"errors"
	"slices"
	"strings"

	"src.opensuse.org/autogits/common"
	"src.opensuse.org/autogits/common/gitea-generated/models"
)

type PRInfo struct {
	pr      *models.PullRequest
	reviews []*models.PullReview
}

type ReviewSet struct {
	prs    []PRInfo
	config *common.AutogitConfig
}

func readPRData(gitea common.GiteaPRFetcher, org, repo string, num int64, currentSet []PRInfo) ([]PRInfo, error) {
	for _, p := range currentSet {
		if num == p.pr.Index && repo == p.pr.Base.Repo.Name && org == p.pr.Base.Repo.Owner.UserName {
			return nil, nil
		}
	}

	pr, err := gitea.GetPullRequest(org, repo, num)
	if err != nil {
		return nil, err
	}
	_, refPRs := common.ExtractDescriptionAndPRs(bufio.NewScanner(strings.NewReader(pr.Body)))
	/*
	if len(refPRs) < 1 {
		return nil, errors.New("missing links")
	}
	*/

	retSet := []PRInfo{PRInfo{pr: pr}}

	for _, prdata := range refPRs {
		data, err := readPRData(gitea, prdata.Org, prdata.Repo, prdata.Num, slices.Concat(currentSet, retSet))
		if err != nil {
			return nil, err
		}
		retSet = slices.Concat(retSet, data)
	}

	return retSet, nil
}

func FetchReviewSet(gitea common.GiteaPRFetcher, org, repo string, num int64, config *common.AutogitConfig) (*ReviewSet, error) {
	prs, err := readPRData(gitea, org, repo, num, nil)
	if err != nil {
		return nil, err
	}

	return &ReviewSet{prs: prs, config: config}, nil
}

func (rs *ReviewSet) GetPrjGitPR() (*models.PullRequest, error) {
	for _, prinfo := range rs.prs {
		if prinfo.pr.Base.Repo.Name == rs.config.GitProjectName && prinfo.pr.Base.Repo.Owner.UserName == rs.config.Organization {
			return prinfo.pr, nil
		}
	}

	return nil, errors.New("No PrjGit PR found")
}