package resolvers

// This file will be automatically regenerated based on the schema, any resolver implementations
// will be copied through when generating and any unknown code will be moved to the end.

import (
	"context"
	"errors"

	"git.aiterp.net/stufflog/server/graph/graphcore"
	"git.aiterp.net/stufflog/server/graph/loaders"
	"git.aiterp.net/stufflog/server/internal/slerrors"
	"git.aiterp.net/stufflog/server/models"
)

func (r *queryResolver) Issue(ctx context.Context, id string) (*models.Issue, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	issue, err := loaders.IssueLoaderFromContext(ctx).Load(id)

	if err != nil {
		return nil, err
	}
	_, err = r.Auth.IssuePermission(ctx, *issue)
	if err != nil {
		return nil, err
	}

	return issue, nil
}

func (r *queryResolver) Issues(ctx context.Context, filter *models.IssueFilter) ([]*models.Issue, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	if filter == nil {
		filter = &models.IssueFilter{}
	}
	issues, err := r.Database.Issues().List(ctx, *filter)
	if err != nil {
		return nil, err
	}

	loader := loaders.IssueLoaderFromContext(ctx)
	for _, issue := range issues {
		loader.Prime(issue.ID, issue)
	}

	deleteList := make([]int, 0, len(issues))
	for i, issue := range issues {
		_, err := r.Auth.IssuePermission(ctx, *issue)
		if err != nil {
			deleteList = append(deleteList, i-len(deleteList))
		}
	}
	for _, index := range deleteList {
		issues = append(issues[:index], issues[index+1:]...)
	}

	return issues, nil
}

func (r *queryResolver) Item(ctx context.Context, id string) (*models.Item, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	return r.Database.Items().Find(ctx, id)
}

func (r *queryResolver) Items(ctx context.Context, filter *models.ItemFilter) ([]*models.Item, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	if filter == nil {
		filter = &models.ItemFilter{}
	}

	return r.Database.Items().List(ctx, *filter)
}

func (r *queryResolver) ItemTags(ctx context.Context) ([]string, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	return r.Database.Items().GetTags(ctx)
}

func (r *queryResolver) IssueItem(ctx context.Context, id string) (*models.IssueItem, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	item, err := r.Database.IssueItems().Find(ctx, id)
	if err != nil {
		return nil, err
	}

	issue, err := loaders.IssueLoaderFromContext(ctx).Load(id)
	if err != nil {
		return nil, err
	}

	_, err = r.Auth.IssuePermission(ctx, *issue)
	if err != nil {
		return nil, err
	}

	return item, nil
}

func (r *queryResolver) IssueItems(ctx context.Context, filter *models.IssueItemFilter) ([]*models.IssueItem, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	if filter == nil {
		filter = &models.IssueItemFilter{}
	}

	items, err := r.Database.IssueItems().List(ctx, *filter)
	if err != nil {
		return nil, err
	}

	accessMap := make(map[string]bool)
	deleteList := make([]int, 0, len(items))
	for i, item := range items {
		if access, ok := accessMap[item.IssueID]; ok && access {
			continue
		} else if ok && !access {
			deleteList = append(deleteList, i-len(deleteList))
			continue
		}

		issue, err := loaders.IssueLoaderFromContext(ctx).Load(item.IssueID)
		if err != nil {
			deleteList = append(deleteList, i-len(deleteList))
			accessMap[item.IssueID] = true
			continue
		}

		_, err = r.Auth.IssuePermission(ctx, *issue)
		if err != nil {
			deleteList = append(deleteList, i-len(deleteList))
		}

		accessMap[issue.ID] = err != nil
	}
	for _, index := range deleteList {
		items = append(items[:index], items[index+1:]...)
	}

	return items, nil
}

func (r *queryResolver) Project(ctx context.Context, id string) (*models.Project, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	project, err := r.Database.Projects().Find(ctx, id)
	if err != nil {
		return nil, err
	}
	_, err = r.Auth.ProjectPermission(ctx, project.ID)
	if err != nil {
		return nil, err
	}

	return project, nil
}

func (r *queryResolver) Projects(ctx context.Context, filter *models.ProjectFilter) ([]*models.Project, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	skipCheck := false
	if filter == nil {
		filter = &models.ProjectFilter{}
	}
	if filter.Permission == nil {
		skipCheck = true
		filter.Permission = &models.ProjectFilterPermission{
			UserID:   user.ID,
			MinLevel: models.ProjectPermissionLevelObserver,
		}
	}

	projects, err := r.Database.Projects().List(ctx, *filter)
	if err != nil {
		return nil, err
	}

	if !skipCheck && len(projects) > 0 {
		deleteList := make([]int, 0, 4)
		for i, project := range projects {
			if _, err := r.Auth.ProjectPermission(ctx, project.ID); err != nil {
				deleteList = append(deleteList, i-len(deleteList))
			}
		}
		for _, di := range deleteList {
			projects = append(projects[:di], projects[di:]...)
		}
	}

	return projects, nil
}

func (r *queryResolver) Log(ctx context.Context, id string) (*models.Log, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	log, err := r.Database.Logs().Find(ctx, id)
	if err != nil {
		return nil, err
	}

	r.Auth.FilterLog(ctx, log)
	if log.Empty() {
		return nil, slerrors.NotFound("Log")
	}

	return log, nil
}

func (r *queryResolver) Logs(ctx context.Context, filter *models.LogFilter) ([]*models.Log, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, slerrors.PermissionDenied
	}

	if filter == nil {
		filter = &models.LogFilter{
			UserIDs: []string{user.ID},
		}
	}

	logs, err := r.Database.Logs().List(ctx, *filter)
	if err != nil {
		return nil, err
	}
	r.Auth.FilterLogList(ctx, &logs)

	return logs, nil
}

func (r *queryResolver) Session(ctx context.Context) (*models.User, error) {
	user := r.Auth.UserFromContext(ctx)
	if user == nil {
		return nil, errors.New("not logged in")
	}

	return user, nil
}

// Query returns graphcore.QueryResolver implementation.
func (r *Resolver) Query() graphcore.QueryResolver { return &queryResolver{r} }

type queryResolver struct{ *Resolver }