package main

import (
	"database/sql"
	"io"
	"log"
	"net/http"
	"os"
	"sevenkeys/database"
	"sevenkeys/database/operations"
	"sevenkeys/scryfall/methods"
	"sevenkeys/scryfall/types"
)

const CACHE_DIR string = "cache"

const SET_ICON_CACHE_DIR string = CACHE_DIR + "/seticons/"
const SET_ICON_FILE_EXTENSION string = ".svg"

const ALL_CARDS_CACHE_FILENAME = CACHE_DIR + "/all-cards.json"

func check(err error) {
	if err != nil {
		log.Fatal(err)
	}
}

func createCacheDirectories() error {
	err := os.Mkdir(CACHE_DIR, os.ModePerm)
	if err != nil && !os.IsExist(err) {
		return err
	}

	err = os.Mkdir(SET_ICON_CACHE_DIR, os.ModePerm)
	if err != nil && !os.IsExist(err) {
		return err
	}

	return nil
}

func importSets(db *sql.DB, sets []types.Set) error {
	for _, set := range sets {
		// We're only interested in paper cards, so skip importing
		// any sets that were only released in a video game
		if set.Digital {
			continue
		}

		log.Println("Importing " + set.Code)
		err = operations.InsertOrUpdateSet(db, set)
		if err != nil {
			return err
		}

		log.Println("Downloading logo for " + set.Code)
		response, err := http.Get(set.IconSvgUri)
		defer response.Body.Close()
		if err != nil {
			return err
		}

		iconFilename := SET_ICON_CACHE_DIR + set.Code + SET_ICON_FILE_EXTENSION
		iconFile, err := os.Create(iconFilename)
		if err != nil {
			return err
		}

		io.Copy(iconFile, response.Body)
		log.Println("Finished importing " + set.Code)
	}
}

func main() {
	log.Println("Connecting to database...")
	db := database.GetDatabaseFromConfig("config.json")
	log.Println("Connected.")

	log.Println("Creating cache directories...")
	err = createCacheDirectories()
	check(err)
	log.Println("Created cache directories.")

	log.Println("Downloading set data from Scryfall...")
	sets, err := methods.GetSets()
	check(err)
	log.Println("Downloaded set data.")

	// Loop through sets, import set data into database and download icons
	// TODO: Only download icon if we don't already have the file
	log.Println("Importing set data...")
	err = importSets()
	check(err)
	log.Println("Imported sets.")

	// Check whether card data has been updated since last download
	// If yes, redownload and recache the bulk data

	// Unmarshal cached file into Golang struct
	// Import cards into database
}