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")
	external_tools_code = 913
	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
}

func list_all_courses() {
	all_courses := fmt.Sprintf("%s/courses?access_token=%s&per_page=100", base_link, token)

	canvas_courses := get_courses(token, all_courses, client)

	for _, course := range canvas_courses {
		fmt.Printf("%s, %d\n", course.Name, course.ID%10000)
	}
}

func list_favorite_courses() {

	// course selection by user happens below
	favorites := fmt.Sprintf("%s/users/self/favorites/courses?access_token=%s&per_page=100", base_link, token)

	canvas_courses := get_courses(token, favorites, client)

	for _, course := range canvas_courses {
		fmt.Printf("%s, %d\n", course.Name, course.ID%10000)
	}
}