package main

import (
	"regexp"
	"unicode/utf8"
	"slices"
	"strings"
	"sort"
	"encoding/json"
	"log"
	"fmt"
	"time"
)

// https://stackoverflow.com/a/75996347
var defaultDiacriticsRemovalMap = []struct {
    base    string
    letters string
}{
    {"A", "\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"},
    {"AA", "\uA732"},
    {"AE", "\u00C6\u01FC\u01E2"},
    {"AO", "\uA734"},
    {"AU", "\uA736"},
    {"AV", "\uA738\uA73A"},
    {"AY", "\uA73C"},
    {"B", "\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181"},
    {"C", "\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E"},
    {"D", "\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779\u00D0"},
    {"DZ", "\u01F1\u01C4"},
    {"Dz", "\u01F2\u01C5"},
    {"E", "\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E"},
    {"F", "\u0046\u24BB\uFF26\u1E1E\u0191\uA77B"},
    {"G", "\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E"},
    {"H", "\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"},
    {"I", "\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"},
    {"J", "\u004A\u24BF\uFF2A\u0134\u0248"},
    {"K", "\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"},
    {"L", "\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"},
    {"LJ", "\u01C7"},
    {"Lj", "\u01C8"},
    {"M", "\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C"},
    {"N", "\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4"},
    {"NJ", "\u01CA"},
    {"Nj", "\u01CB"},
    {"O", "\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C"},
    {"OI", "\u01A2"},
    {"OO", "\uA74E"},
    {"OU", "\u0222"},
    {"OE", "\u008C\u0152"},
    {"oe", "\u009C\u0153"},
    {"P", "\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"},
    {"Q", "\u0051\u24C6\uFF31\uA756\uA758\u024A"},
    {"R", "\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"},
    {"S", "\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"},
    {"T", "\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"},
    {"TZ", "\uA728"},
    {"U", "\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"},
    {"V", "\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"},
    {"VY", "\uA760"},
    {"W", "\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"},
    {"X", "\u0058\u24CD\uFF38\u1E8A\u1E8C"},
    {"Y", "\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"},
    {"Z", "\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"},
    {"a", "\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250"},
    {"aa", "\uA733"},
    {"ae", "\u00E6\u01FD\u01E3"},
    {"ao", "\uA735"},
    {"au", "\uA737"},
    {"av", "\uA739\uA73B"},
    {"ay", "\uA73D"},
    {"b", "\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253"},
    {"c", "\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184"},
    {"d", "\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A"},
    {"dz", "\u01F3\u01C6"},
    {"e", "\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD"},
    {"f", "\u0066\u24D5\uFF46\u1E1F\u0192\uA77C"},
    {"g", "\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F"},
    {"h", "\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"},
    {"hv", "\u0195"},
    {"i", "\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"},
    {"j", "\u006A\u24D9\uFF4A\u0135\u01F0\u0249"},
    {"k", "\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"},
    {"l", "\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747"},
    {"lj", "\u01C9"},
    {"m", "\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"},
    {"n", "\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5"},
    {"nj", "\u01CC"},
    {"o", "\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275"},
    {"oi", "\u01A3"},
    {"ou", "\u0223"},
    {"oo", "\uA74F"},
    {"p", "\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755"},
    {"q", "\u0071\u24E0\uFF51\u024B\uA757\uA759"},
    {"r", "\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"},
    {"s", "\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B"},
    {"t", "\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"},
    {"tz", "\uA729"},
    {"u", "\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"},
    {"v", "\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"},
    {"vy", "\uA761"},
    {"w", "\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"},
    {"x", "\u0078\u24E7\uFF58\u1E8B\u1E8D"},
    {"y", "\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"},
    {"z", "\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"},
}

var diacriticsMap = map[rune]string{}

func removeDiacritics(str string) string {
	for _, mapping := range defaultDiacriticsRemovalMap {
		letters := mapping.letters
		for _, letter := range letters {
			diacriticsMap[letter] = mapping.base
		}
	}

	reg := regexp.MustCompile("[^\u0000-\u007E]")
	return reg.ReplaceAllStringFunc(str, func(a string) string {
		r, _ := utf8.DecodeRuneInString(a)
		if replacement, ok := diacriticsMap[rune(r)]; ok {
			return replacement
		}
		return a
	})
}

func SanitizeName(str string) string {
	re := regexp.MustCompile(`[^a-zA-Z0-9]+`)
	return strings.ToLower(re.ReplaceAllString(removeDiacritics(str), "-"))
}


// Function to create a SQL query to Upsert cards 
// 			Used in : crons.go
func CreateBulkCardsUpsertQuery(data []ScryfallCard) string {
	totalCards := len(data)
	twoFacedLayouts := []string{"transform","modal_dfc","double_faced_token","reversible_card"}
	values := make([]string, totalCards)
	for i := 0; i < totalCards; i++ {
		id := data[i].ID
		name := data[i].Name
		sanitizedName := SanitizeName(data[i].Name) // Sanitized Name
		layout := data[i].Layout
		smallImage := ""
		smallImageBack := ""
		normalImage := ""
		normalImageBack := ""
		// Two Faced
		if slices.Contains(twoFacedLayouts,data[i].Layout) {
			smallImage = data[i].CardFaces[0].ImageUris.Small
			smallImageBack = data[i].CardFaces[0].ImageUris.Normal
			normalImage = data[i].CardFaces[1].ImageUris.Small
			normalImageBack = data[i].CardFaces[1].ImageUris.Normal
		} else {
			smallImage = data[i].ImageUris.Small
			normalImage = data[i].ImageUris.Normal
		}
		// Type
		cardTypeLine := strings.ToLower(data[i].TypeLine)
		cardType := ""
		if strings.Contains(cardTypeLine, "creature") {
			cardType = "creature"
		} else if strings.Contains(cardTypeLine, "planeswalker") {
			cardType = "planeswalker"
		} else if strings.Contains(cardTypeLine, "artifact") {
			cardType = "artifact"
		} else if strings.Contains(cardTypeLine, "instant") {
			cardType = "instant"
		} else if strings.Contains(cardTypeLine, "enchantment") {
			cardType = "enchantment"
		} else if strings.Contains(cardTypeLine, "sorcery") {
			cardType = "sorcery"
		} else if strings.Contains(cardTypeLine, "land") {
			cardType = "land"
		} else {
			cardType = "unknown"
		}
		colorIdentityBytes, err := json.Marshal(data[i].ColorIdentity)
		if err != nil {
			log.Fatal(err)
		}
		colorIdentity := string(colorIdentityBytes)
		releasedAt := data[i].ReleasedAt
		setId := data[i].SetID
		setCode := data[i].Set
		price := data[i].Prices.Eur
		cardmarketUri := data[i].PurchaseUris.Cardmarket
		canBeCommander := (strings.Contains(cardTypeLine, "legendary") && cardType == "creature") || cardType == "planeswalker"

		values[i] = fmt.Sprintf(`("%v", "%s", "%v", "%v", "%v", "%v", "%v", "%v", "%v", '%v', "%v", "%v", "%v", "%v", "%v", "%v")`,id, name, sanitizedName, layout, smallImage, smallImageBack, normalImage, normalImageBack, cardType, colorIdentity, releasedAt, setId, setCode, price, cardmarketUri, canBeCommander) 
	}

	upsertQuery := fmt.Sprintf("INSERT INTO carte(id, name, sanitized_name, layout, small_image, small_image_back, normal_image, normal_image_back, type, color_identity, released_at, mtg_set, set_code, price, cardmarket_url, can_be_commander) VALUES %s ON CONFLICT (id) DO UPDATE SET price = excluded.price", strings.Join(values, ", "))

	return upsertQuery
}

// Function to create a SQL query to Insert sets 
// 			Used in : crons.go
func CreateBulkSetsInsertQuery(data []ScryfallSet) string {
	totalSets := len(data)
	values := make([]string, totalSets)
	for i := 0; i < totalSets; i++ {
		values[i] = fmt.Sprintf(`("%v", "%v", "%v", "%v", "%v", "%v", "%v")`,data[i].ID, data[i].Name, SanitizeName(data[i].Name), data[i].Code, data[i].IconSvgUri, data[i].SetType, data[i].ReleasedAt) 
	}

	insertQuery := fmt.Sprintf("INSERT OR IGNORE INTO mtg_set(id, name, sanitized_name, code, icon_uri, type, released_at) VALUES %s", strings.Join(values, ", ")) 

	return insertQuery
}

// Timer used to time a function
// 			Used in : cache.go
func timer(name string) func() {
    start := time.Now()
    return func() {
        log.Printf("%s took %v\n", name, time.Since(start))
    }
}

// Function to create all possible combinations of an array with a said length
// 			Used in : cache.go
// 			Source (in java) : https://hmkcode.com/calculate-find-all-possible-combinations-of-an-array-using-java/
func CreateCombination(s []string, k int) []string {
	res := []string{}
	ignore := make([]int, len(s) - k)
	combination := make([]string, k)
	for w := 0; w < len(ignore); w++ {
		ignore[w] = len(s) - 1 - w
	}
	// Edit fonction above to make it ascending by default
	sort.Slice(ignore, func(i, j int) bool { return ignore[i] < ignore[j]})

	i := 0
	r := 0 
	g := 0 

	terminate := false
	for !terminate {
		for i < len(s) && r < k {
			if i != ignore[g] {
				combination[r] = s[i];
				r++
				i++
			} else {
				if g != len(ignore) - 1 {
					g++
				}
				i++
			}
		}
		i = 0
		r = 0 
		g = 0 

		res = append(res, strings.Join(combination,""))
		terminate = true

		for w := 0; w < len(ignore); w++ {
			if ignore[w] > w {
				ignore[w]--

				if w > 0 {
					ignore[w-1] = ignore[w]-1
				}
				terminate = false
				break
			}
		}
	}
	return res
}