import {Component, OnInit, ViewChild} from '@angular/core';
import { CupboardService } from '../../services/cupboard.service';
import { Need, GoalType } from '../../models/Need';
import { userType } from '../../models/User';
import { catchError, of } from 'rxjs';
import { NeedListComponent } from '../need-list/need-list.component';
import {AuthService} from '../../services/auth.service';
import {ToastsService, ToastType} from '../../services/toasts.service';
import {UsersService} from '../../services/users.service';
import {SortingAlgoArrays} from './sorting';

@Component({
    selector: 'app-cupboard',
    standalone: false,
    templateUrl: './cupboard.component.html',
    styleUrl: './cupboard.component.css'
})
export class CupboardComponent implements OnInit {

    selectedForm?: string = undefined;
    // needs: any;
    @ViewChild("needList") needList?: NeedListComponent

    private searchDelay: any;
    selectedNeed: Need | null = null;
    needs: Need[] = [];
    searchResults: Need[] = [];
    sortMode: 'Ascending' | 'Descending' = 'Ascending'

    currentSortAlgo = SortingAlgoArrays.sortByPriority;

    constructor(
        private cupboardService: CupboardService,
        private authService: AuthService,
        private toastService: ToastsService,
        private usersService: UsersService
    ) {}

    ngOnInit(): void {
        this.cupboardService.getNeeds().subscribe(n => {
            this.needs = n;
            this.refresh()
        });
    }

    refresh() {
        this.cupboardService.getNeeds().subscribe(n => {
            if (this.sortMode == 'Ascending') {
                this.needs = n.sort(this.currentSortAlgo.func);
            } else {
                this.needs = n.sort(this.currentSortAlgo.func).reverse();
            }
            this.searchResults = this.needs;
            // this.updateVisibleNeeds();
        });

        const form = document.getElementById('search-form') as HTMLFormElement;
        form.reset();
        this.search(null);
    }

    selectForm(name: string) {
        //get search results from the need list
        if (this.needList) {
            // this.searchResults = this.needList.searchResults;
        }
        console.log(this.searchResults)
        this.selectedForm = name;
        if (name == 'update') {
            if (this.searchResults) {
                this.searchResults.forEach((element: any) => {
                    console.log(element)
                });
            }

        }
    }

    async search(form: any) {
        //wait .25 seconds before searching but cancel if another search is made during the wait to prevent too many api calls

        //remove previous search if it exists
        if (this.searchDelay) {
            clearTimeout(this.searchDelay);
        }
        if (form) {
            this.searchDelay = setTimeout(() => {

                if (form) {
                    //sorting based on algo selected
                    // SortingAlgoArrays.forEach(algo => {
                    //     if(algo.name === this.sortSelection) {
                    //         this.currentSortAlgo = SortingAlgoArrays[this.sort];
                    //         console.log("changed sorting algorithm to: ", algo.name + this.sortMode)
                    //         return
                    //     }
                    // });

                    const currentSearchValue = form.search; //latest value of the search
                    this.cupboardService.searchNeeds(currentSearchValue).subscribe((n) => {
                        if (this.sortMode == 'Ascending') {
                            this.searchResults = n.sort(this.currentSortAlgo.func);
                        } else {
                            this.searchResults = n.sort(this.currentSortAlgo.func).reverse();
                        }
                        // this.updateVisibleNeeds();
                    });
                }
            }, 250);
        } else {
            //user has cleared the search bar, we can skip the timeout for a 1/4 second faster response
            //clear timeout to stop pending search
            clearTimeout(this.searchDelay);
            this.searchResults = this.needs;
        }
    }

    changeSortMode(form : any) {
        if (this.sortMode == 'Ascending'){
            this.sortMode = 'Descending'
        } else {
            this.sortMode = 'Ascending'
        }
        this.search(form)
    }

    changeText(id : number, text : string) {
        const span = document.getElementById('hover-status-label-' + id);
        if (span) {
            span.innerHTML = ' ' + text;
        }
    }

    async updateSearchResults() {
        if (this.needList) {
            while (this.selectedForm == 'update') {
                // this.searchResults = this.needList.searchResults
                await new Promise(resolve => setTimeout(resolve, 100));
            }
        }
    }

    populateForm(need: any): void {
        this.selectForm('update');
        this.selectedNeed = { ...need };
    }

    isManager() {
        const type = this.authService.getCurrentUser()?.type;
        return type === ("MANAGER" as unknown as userType);
    }

    isHelper() {
        const type = this.authService.getCurrentUser()?.type;
        return type === ("HELPER" as unknown as userType);
    }

    // -------------- DISPLAY FUNCTIONS -------------- //

    select(need : Need) {
        //emit value
        // this.currentNeed.emit(need);
        if (this.selectedNeed) {
            //revert already selected need to previous style
            console.log(need.id);
            let button = document.getElementById('need-button-' + this.selectedNeed.id);
            if (button) {
                console.log(button)
                button.style.background = 'lightgray';
                button.style.marginLeft = '0%';
                button.style.width = '98%';
            }
            button = document.getElementById('need-edit-button-' + this.selectedNeed.id);
            if (button) {
                button.style.visibility = 'visible';
            }
        }
        //change selected need to selected style
        this.selectedNeed = need;
        let button = document.getElementById('need-button-' + need.id);
        if (button) {
            button.style.background = 'white';
            button.style.marginLeft = '4%';
            button.style.width = '100%';
        }
        button = document.getElementById('need-edit-button-' + need.id);
        if (button) {
            button.style.visibility = 'hidden';
        }
    }

    submit(form: any) {
        const need: Need = {
            name: form.name,
            image: form.image,
            location: form.location,
            id: 0,
            maxGoal: form.maxGoal,
            type: form.type,
            urgent: !!form.urgent,
            filterAttributes: [],
            current: 0,
            description: form.description
        };
        console.log("need:", need);
        console.log("form submitted. creating need: ", need);
        this.cupboardService.createNeed(need)
            .pipe(catchError((ex, _) => {
                if (ex.status == 500) {
                    this.toastService.sendToast(ToastType.ERROR, "Fields cannot be blank");
                } else if (ex.status == 400) {
                    this.toastService.sendToast(ToastType.ERROR, ex.error);
                } else {
                    this.toastService.sendToast(ToastType.ERROR, "Error on creating need");
                }
                return of()
            }))
            .subscribe(
                (result) => {
                    if (result) {
                        console.log("need created successfully");
                        // this.needList?.refresh()
                    } else {
                        console.log("need creation failed");
                    }
                }

            );
    }

    // -------------- CRUD OPERATIONS -------------- //

    delete(id : number) {
        this.cupboardService.deleteNeed(id).subscribe(() => {
            this.toastService.sendToast(ToastType.INFO, "Need deleted.")
            this.needs = this.needs.filter(n => n.id !== id)
        })
        this.refresh();
    }

    add(need: Need) {
        const currentUser = this.authService.getCurrentUser();
        //console.log("get current user in angular:", currentUser)
        if (currentUser) {
            if (!currentUser.basket.includes(need.id)) {
                currentUser.basket.push(need.id);
                this.usersService.updateUser(currentUser)
                    .pipe(catchError((err, _) =>  {
                        console.error(err);
                        return of();
                    }))
                    .subscribe(() => {
                        this.usersService.refreshBasket();
                    });
            } else {
                this.toastService.sendToast(ToastType.ERROR, "This need is already in your basket!")
            }
        }
    }

    protected readonly SortingAlgoArrays = SortingAlgoArrays;
    protected readonly Object = Object;
}