package mutations

import (
	"context"
	"time"

	"git.aiterp.net/rpdata/api/graphql/resolver/types"
	"git.aiterp.net/rpdata/api/internal/session"
	"git.aiterp.net/rpdata/api/model/change"
	"git.aiterp.net/rpdata/api/model/story"
)

// EditChapterArgs is args for the editChapter mutation
type EditChapterArgs struct {
	Input *struct {
		ID            string
		Title         *string
		Source        *string
		FictionalDate *string
	}
}

// EditChapter resolves the editChapter mutation
func (r *MutationResolver) EditChapter(ctx context.Context, args *EditChapterArgs) (*types.ChapterResolver, error) {
	input := args.Input

	user := session.FromContext(ctx).User()
	if user == nil || !user.Permitted("member", "chapter.edit") {
		return nil, ErrUnauthorized
	}

	chapter, err := story.FindChapterID(input.ID)
	if err != nil {
		return nil, err
	}

	if chapter.Author != user.ID && !user.Permitted("chapter.edit") {
		return nil, ErrPermissionDenied
	}

	var fictionalDate *time.Time
	if input.FictionalDate != nil {
		date, err := time.Parse(time.RFC3339Nano, *input.FictionalDate)
		if err != nil {
			return nil, err
		}

		fictionalDate = &date
	}

	err = chapter.Edit(input.Title, input.Source, fictionalDate)
	if err != nil {
		return nil, err
	}

	go change.Submit("Chapter", "edit", user.ID, chapter.ID, map[string]interface{}{
		"title":         input.Title,
		"source":        input.Source,
		"fictionalDate": fictionalDate,
	})

	return &types.ChapterResolver{C: chapter}, nil
}