package main

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/http/cookiejar"
	"os"

	"golang.org/x/net/publicsuffix"
)

func initialize() {
	base_link = "https://floridapolytechnic.instructure.com/api/v1"
	token = os.Getenv("CANVAS_API_KEY")

	jar, _ := cookiejar.New(&cookiejar.Options{
		PublicSuffixList: publicsuffix.List,
	})

	client = http.Client{
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			fmt.Println("Redirected to:", req.URL)
			fmt.Println(req.Cookies())
			return nil
		},
		Jar: jar,
	}
}

func get_courses(token string, link string, client http.Client) []CanvasCourse {
	resp, err := client.Get(link)
	if err != nil {
		fmt.Println("Error performing GET request to get courses.")
		return nil
	}
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)

	var canvas_courses []CanvasCourse
	err2 := json.Unmarshal(body, &canvas_courses)
	if err2 != nil {
		fmt.Println(err2)
		return nil
	}

	return canvas_courses
}

// Need to change this to grab both ID and name, return as pairs.
func get_course_id_name_pair(canvas_courses []CanvasCourse) []uint64 {
	var courses []uint64

	for _, course := range canvas_courses {
		courses = append(courses, course.ID%10000)
	}
	return courses
}

/*
func select_course() int {
	// course selection by user happens below
	favorites := fmt.Sprintf("%s/users/self/favorites/courses?access_token=%s&per_page=100", base_link, token)
	all_courses := fmt.Sprintf("%s/courses?access_token=%s&per_page=100", base_link, token)
	var canvas_courses []CanvasCourse
	canvas_courses = get_courses(token, favorites, client)
	var course_ids []uint64
	course_ids = get_course_ids(canvas_courses)
	//selected := 1 // course_ids[selected]
	// course selection by user happens above
	return 0
}
*/