package queries

import (
	"context"
	"errors"
	"time"

	"git.aiterp.net/rpdata/api/models/characters"

	"git.aiterp.net/rpdata/api/models/changekeys"

	"git.aiterp.net/rpdata/api/models/changes"

	"git.aiterp.net/rpdata/api/graph2/input"
	"git.aiterp.net/rpdata/api/internal/auth"
	"git.aiterp.net/rpdata/api/models/chapters"
	"git.aiterp.net/rpdata/api/models/comments"

	"git.aiterp.net/rpdata/api/models"
)

// Queries

func (r *resolver) Comment(ctx context.Context, id string) (models.Comment, error) {
	return comments.Find(id)
}

// Mutations

func (r *mutationResolver) AddComment(ctx context.Context, input input.CommentAddInput) (models.Comment, error) {
	chapter, err := chapters.FindID(input.ChapterID)
	if err != nil {
		return models.Comment{}, errors.New("Chapter not found")
	}

	token := auth.TokenFromContext(ctx)
	if !token.Permitted("member", "story.edit") {
		return models.Comment{}, errors.New("Unauthorized")
	}

	if !chapter.CanComment() {
		return models.Comment{}, errors.New("You cannot comment on this chapter")
	}

	var characterPtr *models.Character
	if input.CharacterID != nil {
		character, err := characters.FindID(*input.CharacterID)
		if err != nil {
			return models.Comment{}, errors.New("Character not found")
		} else if character.Author != token.UserID {
			return models.Comment{}, errors.New("That is not your character")
		}

		characterPtr = &character
	}

	fictionalDate := time.Time{}
	if input.FictionalDate != nil {
		fictionalDate = *input.FictionalDate
	}

	subject := ""
	if input.Subject != nil {
		subject = *input.Subject
	}

	comment, err := comments.Add(chapter, subject, token.UserID, input.Source, input.CharacterName, characterPtr, time.Now(), fictionalDate)
	if err != nil {
		return models.Comment{}, errors.New("Failed to add comment: " + err.Error())
	}

	go changes.Submit("Comment", "add", token.UserID, true, changekeys.Many(comment, chapter, models.Story{ID: chapter.StoryID}), comment, chapter)

	return comment, nil
}

func (r *mutationResolver) EditComment(ctx context.Context, input input.CommentEditInput) (models.Comment, error) {
	comment, err := comments.Find(input.CommentID)
	if err != nil {
		return models.Comment{}, errors.New("Comment not found")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(comment.Author, "member", "story.edit") {
		return models.Comment{}, errors.New("You cannot edit this comment")
	}

	chapter, err := chapters.FindID(comment.ChapterID)
	if err != nil {
		return models.Comment{}, errors.New("Comment's chapter not found")
	}

	if !chapter.CanComment() {
		return models.Comment{}, errors.New("Comments are disabled or locked")
	}

	if input.ClearFictionalDate != nil && *input.ClearFictionalDate == true {
		input.FictionalDate = &time.Time{}
	}

	if input.CharacterID != nil && *input.CharacterID != "" {
		character, err := characters.FindID(*input.CharacterID)
		if err != nil {
			return models.Comment{}, errors.New("Character not found")
		} else if character.Author != token.UserID {
			return models.Comment{}, errors.New("That is not your character")
		}
	}

	comment, err = comments.Edit(comment, input.Source, input.CharacterName, input.CharacterID, input.Subject, input.FictionalDate)
	if err != nil {
		return models.Comment{}, errors.New("Could not post comment: " + err.Error())
	}

	go changes.Submit("Comment", "edit", token.UserID, true, changekeys.Many(comment, chapter, models.Story{ID: chapter.StoryID}), comment, chapter)

	return comment, nil
}

func (r *mutationResolver) RemoveComment(ctx context.Context, input input.CommentRemoveInput) (models.Comment, error) {
	comment, err := comments.Find(input.CommentID)
	if err != nil {
		return models.Comment{}, errors.New("Comment not found")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(comment.Author, "member", "story.edit") {
		return models.Comment{}, errors.New("You cannot remove this comment")
	}

	chapter, err := chapters.FindID(comment.ChapterID)
	if err != nil {
		return models.Comment{}, errors.New("Comment's chapter not found")
	}

	if !chapter.CanComment() {
		return models.Comment{}, errors.New("Comments are disabled or locked")
	}

	err = comments.Remove(comment)
	if err != nil {
		return models.Comment{}, errors.New("Failed to remove comment: " + err.Error())
	}

	return comment, nil
}