import { Component } from '@angular/core';

import { DataService } from '../core/data.service';
import { DegreePlan } from '../core/models/degree-plan';
import { Term } from '../core/models/term';
import { log } from 'util';
import { Note } from '../core/models/note';

@Component({
	selector: 'cse-degree-planner',
	templateUrl: './degree-planner.component.html',
	styleUrls: ['./degree-planner.component.scss']
})

export class DegreePlannerComponent {
	degreePlans: DegreePlan[];
	degreePlanCourses: any[];
	selectedDegreePlan: number;
	terms: Term[];
	termsByAcademicYear: Object;
	subjectsMap: Object;
	notes: Note[];
	firstCurrentTerm: null|string;


	constructor(private dataService: DataService) {
		this.firstCurrentTerm = null;

		this.dataService.getDegreePlans()
		.subscribe(data => {
			this.degreePlans = data;
			this.selectedDegreePlan = this.degreePlans[0].roadmapId;
		});

		this.dataService.getAllPlanData()
		.subscribe(data => {
			// Seperate the data from the forked API calls
			this.degreePlanCourses = data[0];
			this.terms = data[1];

			// Loop over the current terms and determine the current / future terms
			for (const term of this.terms) {
				if (this.firstCurrentTerm === null || parseInt(term.termCode, 10) < parseInt(this.firstCurrentTerm, 10)) {
					this.firstCurrentTerm = term.termCode;
				}
			}

			// Create the global data object
			this.termsByAcademicYear = {};

			// Loop over all the courses, creating a placeholder year if one doesn't exsist
			for (const course of this.degreePlanCourses) {
				// Get the 3 digit year code and 1 digit term code
				const year = course.termCode.substring(0, 3);
				const termCode = course.termCode.substring(3);

				// Create and add a placeholder year to the data object
				if (!this.termsByAcademicYear[year]) {
					this.termsByAcademicYear[year] = this.getYearObject(year);
				}

				// Add the course to the proper year > term
				this.termsByAcademicYear[year].terms[termCode].courses.push(course);
			}
		});

		this.dataService.getSubjectsMap()
		.subscribe( subjectsMap => {
			this.subjectsMap = subjectsMap;
		});

		this.dataService.getTerms()
		.subscribe(terms => {});

		this.getAllNotes();
	}

	getAllNotes() {
		this.dataService.getAllNotes()
		.subscribe(notes => {
			this.notes = notes;
		});
	}

	// Create a new year object to be used in this.termsByAcademicYear
	getYearObject(yearCode) {
		const year = {
			year: yearCode,
			terms: {}
		};

		for (const termCode of ['2', '4', '6']) {
			year.terms[termCode] = {
				termCode: `${yearCode}${termCode}`,
				courses: [],
				pastTerm: (this.firstCurrentTerm && parseInt(this.firstCurrentTerm, 10) > parseInt(`${yearCode}${termCode}`, 10)) ? true : false
			};
		}

		return year;
	}

	getCoursesByTerm(termCode) {
		if (!this.degreePlanCourses) {
			return [];
		}

		for ( const term of this.degreePlanCourses ) {
			if (term.termCode === termCode) {
				return term.courses;
			}
		}

		return [];
	}

	getTermDropZone() {
		if (!this.degreePlanCourses) {
			return false;
		}

		const termCodes = [
			'favoriteCourse-dropZone'
		];

		for (const yearCode in this.termsByAcademicYear) {
			if (this.termsByAcademicYear[yearCode]) {
				const year = this.termsByAcademicYear[yearCode];
				for (const termKey in year.terms) {
					if (year.terms[termKey]) {
						const term = year.terms[termKey];
						termCodes.push('term-' + term.termCode);
					}
				}
			}
		}
		// console.log(termCodes);

		return termCodes;
	}

}