import { getStorageValue, setStorageValue } from './storage'
import { logDebug, log, logError } from './utils/log'
import './config'
declare function GM_fetch(input: string | URL | globalThis.Request, init?: RequestInit): Promise<Response>
import './GM_fetch'
import { storage_version, storage_schema, storage_lastUpdateTime } from './config'
import Australiums from '../resources/australiums.json'
const semver = require('semver')

export function checkAustraliumVariant(defindex: number): boolean {
  return Object.prototype.hasOwnProperty.call(Australiums, defindex.toString());
}

export declare const __VERSION__: string;

function isDateAfterOneDay(date1: Date, date2: Date): boolean {
	const diff = date2.getTime() - date1.getTime();
	const diffDays = Math.round(diff / (1000 * 3600 * 24));
	return diffDays > 1;
}

export enum ItemSlot {
	Primary = "primary",
	Secondary = "secondary",
	Melee = "melee",
	PDA = "pda",
	PDA2 = "pda2",
	Building = "building",
	Misc = "misc",
	Special = "special",
	Taunt = "taunt",
	Tool = "tool",
}

export class ItemSchema {
	[key: string]: {
		name: string,
		slot: ItemSlot,
		tradable: Boolean,
		hasAustraliumVariant: Boolean,
		festiveVariant: number | null
		botkillerVariants: Array<number> | null
		canKillstreakify: Boolean
	};
}

export function getItemIndexByName(schema: ItemSchema, name: string, excludeStock: Boolean = true, excludeDecorated: Boolean = true) {
	for (const [defindex, value] of Object.entries(schema)) {
		if (value['name'] == name) {
			const index = parseInt(defindex)
			if(excludeStock && index <= 30) continue
			if(excludeDecorated && (index >= 15000 && index < 16000)) continue
			return index
		}
	}
	return null
}

export function getTradableStatusByDefindex(schema: ItemSchema, defindex: number) {
	return schema[defindex.toString()].tradable
}

export function getTradableStatusByName(schema: ItemSchema, name: string, excludeStock: Boolean = true, excludeDecorated = true,) {
	for (const [defindex, value] of Object.entries(schema)) {
		if (value['name'] == name) {
			const index = parseInt(defindex)
			if(excludeStock && index <= 30) continue
			if(excludeDecorated && (index >= 15000 && index < 16000)) continue
			return value.tradable
		}
	}
	return true
}

export function linkFestiveVariants(items: Array<{item_class: string, defindex: number, item_name: string}>, schema: ItemSchema): void {
	if(!schema) return
	items.filter(item =>
			item.item_class != null &&
			item.item_class.startsWith('tf_weapon') &&
			item.item_name.startsWith('Festive ')
	).forEach(festive => {
			const originalName = festive.item_name.slice(8); // "Festive " is 8 chars
			const original = items.find(item => item.item_name === originalName && item.defindex > 30 && (item.defindex < 15000 || item.defindex >= 16000));

			if (original) {
				if(schema[original.defindex]) {
					schema[original.defindex].festiveVariant = festive.defindex;
				}
			}
	});
}

export function linkBotkillerVariants(items: Array<{item_class: string, defindex: number, item_name: string, item_type_name: string}>, schema: ItemSchema): void {
	if(!schema) return
	items.filter(item =>
			item.item_class != null &&
			item.item_class.startsWith('tf_weapon') &&
			item.item_name.includes('Botkiller')
	).forEach(botkiller => {
			const originalName = botkiller.item_type_name
		  const original = items.find(item => item.item_name === originalName && item.defindex > 30 && (item.defindex < 15000 || item.defindex >= 16000));
			if (original) {
				if(schema[original.defindex]) {
					if(schema[original.defindex].botkillerVariants == null) {
						// init array
						schema[original.defindex].botkillerVariants = new Array<number>()
					}
					schema[original.defindex].botkillerVariants.push(botkiller.defindex)
				}
			}
	});
}

export async function wipeSchema(): Promise<void> {
	await setStorageValue(storage_version, __VERSION__)
	await setStorageValue(storage_schema, null)
	await setStorageValue(storage_lastUpdateTime, new Date().toISOString())
	logDebug(`Schema wiped`)
}

export async function prepareSchema(): Promise<ItemSchema> {
	let needsUpdate: boolean = false
  let itemSchema: ItemSchema | null = null

	const storedVersion: string | null = await getStorageValue(storage_version, null)
	if(!storedVersion || !semver.valid(storedVersion)) {
		log(`Cache is from an unknown version of the extension. Updating for version ${__VERSION__}`);
		needsUpdate = true
	} else if(semver.valid(storedVersion) && semver.lt(storedVersion, __VERSION__)) {
		log(`Cache is from a previous version (${storedVersion}) of the extension. Updating for version ${__VERSION__}`);
		needsUpdate = true
	} else {
		log(`Cache is from current version (${storedVersion}) of the extension.`);
		itemSchema = await getStorageValue(storage_schema, null);
	}

	const update = await getStorageValue(storage_lastUpdateTime, null)
	if (update) {
		const lastUpdateTime = new Date(update);
		log(`Item schema updated at ${lastUpdateTime}`);
		if (itemSchema == null || Object.keys(itemSchema).length === 0 || isDateAfterOneDay(lastUpdateTime, new Date())) {
			needsUpdate = true
		}
	}

	if(needsUpdate) {
		log("Item Schema out of Date. Rebuilding...");
		const url = "https://raw.githubusercontent.com/danocmx/node-tf2-static-schema/master/static/items.json"
		const response = await GM_fetch(url);
		if (response.ok) {
			await setStorageValue(storage_lastUpdateTime, new Date().getTime());

			const cacheItems = {}

			const responseItems: any[] = await response.json()
			// We want to keep the keys `defindex`, `item_name`, and `attributes`
			responseItems.forEach((item: any) => {
				const defindex: number = item['defindex']

				let tradable: boolean = true
				try {
					if(item['attributes'] != null) {
						if(item['attributes'].find((attribute: {}) => (attribute as any)['class'] == "cannot_trade")) {
							tradable = false
						}
					}
				} catch(error) {
					logError(error)
					log(item)
				}

				let canKillstreakify: boolean = false
				try {
					if(item['capabilities'] != null) {
						if(item['capabilities']['can_killstreakify'] != null && item['capabilities']['can_killstreakify'] == true) {
							canKillstreakify = true
						}
					}
				} catch(error) {
					logError(error)
					log(item)
				}

				(cacheItems as any)[defindex.toString()] = {
					"name": item['item_name'],
					"slot": item['item_slot'],
					"tradable": tradable,
					"canKillstreakify": canKillstreakify,
					"hasAustraliumVariant": checkAustraliumVariant(defindex)
				}
			});

			linkFestiveVariants(responseItems, cacheItems)
			linkBotkillerVariants(responseItems, cacheItems)

			await setStorageValue(storage_schema, (cacheItems));
			itemSchema = cacheItems
			await setStorageValue(storage_version, __VERSION__);
			logDebug(`Item schema updated at ${new Date()}`)
		} else {
			logError("Could not fetch item schema.");
		}
	}
	return itemSchema
}