import { Injectable } from "@angular/core";
import { IIdea } from "app/core/model/idea.interface";
import { IPost } from "app/core/model/post.interface";

@Injectable()
export class SortService {

    public sort(ideas: IIdea[], order: boolean): IIdea[] {
        // if ideas to sort are given
        if (ideas) {
            return ideas.sort((idea: IIdea, otherIdea: IIdea): number => {
                // sort ascending
                if (order) {
                    // both ideas have due_dates set (getTime would error if not)
                    if (idea.due_date && otherIdea.due_date) {
                        // if both are dates are the same don't sort, if one is earlier/later than the other do sort.
                        if (idea.due_date.getTime() === otherIdea.due_date.getTime()) {
                            return 0;
                        } else if (idea.due_date.getTime() <= otherIdea.due_date.getTime()) {
                            return -1;
                        } else {
                            return 1;
                        }
                        // if the other date is null it's treated as earlier the other cases are analog
                    } else if (idea.due_date && !otherIdea.due_date) {
                        return 1;
                    } else if (!idea.due_date && otherIdea.due_date) {
                        return -1;
                    } else {
                        return 0;
                    }
                    // sort descending logic is analog to ascending
                } else {
                    if (idea.due_date && otherIdea.due_date) {
                        if (idea.due_date.getTime() === otherIdea.due_date.getTime()) {
                            return 0;
                        } else if (idea.due_date.getTime() >= otherIdea.due_date.getTime()) {
                            return -1;
                        } else {
                            return 1;
                        }
                    } else if (idea.due_date && !otherIdea.due_date) {
                        return -1;
                    } else if (!idea.due_date && otherIdea.due_date) {
                        return 1;
                    } else {
                        return 0;
                    }
                }
            });
        }
    }

    public sortPost(posts: IPost[], order: boolean): IPost[] {
        if (posts) {
            return posts.sort((post: IPost, otherPost: IPost): number => {
                // sort ascending
                if (order) {
                    // both ideas have due_dates set (getTime would error if not)
                    if (post.publish_date && otherPost.publish_date) {
                        // if both are dates are the same don't sort, if one is earlier/later than the other do sort.
                        if (post.publish_date.getTime() === otherPost.publish_date.getTime()) {
                            return 0;
                        } else if (post.publish_date.getTime() <= otherPost.publish_date.getTime()) {
                            return -1;
                        } else {
                            return 1;
                        }
                        // if the other date is null it's treated as earlier the other cases are analog
                    } else if (post.publish_date && !otherPost.publish_date) {
                        return 1;
                    } else if (!post.publish_date && otherPost.publish_date) {
                        return -1;
                    } else {
                        return 0;
                    }
                    // sort descending logic is analog to ascending
                } else {
                    if (post.publish_date && otherPost.publish_date) {
                        if (post.publish_date.getTime() === otherPost.publish_date.getTime()) {
                            return 0;
                        } else if (post.publish_date.getTime() >= otherPost.publish_date.getTime()) {
                            return -1;
                        } else {
                            return 1;
                        }
                    } else if (post.publish_date && !otherPost.publish_date) {
                        return -1;
                    } else if (!post.publish_date && otherPost.publish_date) {
                        return 1;
                    } else {
                        return 0;
                    }
                }
            });
        }
    }

}