import { get, writable } from 'svelte/store';
import { addNotification, notiStore } from '../stores/noti';
import {
	currentRecipeVersionsSelector,
	lastRequestSheetPrice,
	materialFromServerQuery,
	priceRecipeData,
	recipeData,
	recipeDataError,
	recipeLoading,
	recipeOverviewData,
	recipeStreamMeta,
	streamingRawData,
	streamingRawMeta,
	toppingGroupFromServerQuery,
	toppingListFromServerQuery
} from '../stores/recipeStore';
import {
	handleSheetStreamStart,
	handleSheetStreamChunk,
	handleSheetStreamEnd,
	handleSheetStreamError,
	handleCatalogsResponse,
	handleListMenuResponse,
	sheetCatalogsLoading,
	handleRawStreamHeader,
	handleRawStreamChunk,
	handleRawStreamEnd
} from '../stores/sheetStore';
import {
	handleGenLayoutBatchStart,
	handleGenLayoutFile,
	handleGenLayoutBatchEnd,
	handleGenLayoutError
} from '../stores/genLayoutStore';
import { buildOverviewFromServer } from '$lib/data/recipeService';
import { auth } from '../client/firebase';
import { type RecipeVersion } from '$lib/models/recipe_version.model';
import { goto } from '$app/navigation';
import { socketAlreadySendHeartbeat, socketConnectionOfflineCount } from '../stores/websocketStore';
import type { RecipePrice } from '$lib/models/price.model';
import { sendCommandRequest, sendMessage } from './ws_messageSender';
import { auth as authStore } from '../stores/auth';
import { v4 as uuidv4 } from 'uuid';
import { handleSheetResponseFromNoti } from './sheetNotiHandler';

export const messages = writable<string[]>([]);

type WSMessage = { type: string; payload: any };

// MAXIMUM LIMIT = 1814355
const handlers: Record<string, (payload: any) => void> = {
	chat: (p) => messages.update((m) => [...m, p]),
	ping: (p) => console.log('ping from server'),
	recipeResponse: (p) => {
		let recipe_result = p.result;
		let recipe_request = p.request;

		if (recipe_result) {
			addNotification('INFO:Start fetch recipe!');
		}
	},
	stream_data_start: (p) => {
		let stream_id = p.stream_id;
		let total_size = p.total_size;
		let chunk_size = p.chunk_size;
		let data_meta = p.metadata;

		if (stream_id) {
			addNotification('INFO:Start streaming data');

			let meta_list = data_meta?.split(',');
			let version = meta_list[0]?.split('=')[1] ?? '';
			let country = meta_list[1]?.split('=')[1] ?? '';

			// recipeLoading.set(true);
			recipeStreamMeta.set({
				id: stream_id,
				total_size: total_size,
				chunk_size: chunk_size,
				progress: 0,
				version,
				country
			});
			recipeData.set([]);
			recipeOverviewData.set([]);

			materialFromServerQuery.set([]);
			toppingListFromServerQuery.set([]);
			toppingGroupFromServerQuery.set([]);
		}
	},
	stream_data_error: (p) => {
		recipeLoading.set(false);
		recipeDataError.set(p);

		setTimeout(() => {
			addNotification(`ERROR:${p.error}`);
		}, 2000);
	},
	stream_data_chunk: (p) => {
		let current_meta = get(recipeStreamMeta);
		// console.log('current meta', current_meta);
		if (current_meta) {
			let stream_id = current_meta.id;

			let progress_response_id = p.stream_id;
			if (stream_id === progress_response_id) {
				let current_response_end = p.start_idx + current_meta.chunk_size;
				let percent = (current_response_end / current_meta.total_size) * 100;
				if (percent > 100) {
					percent = 100;
				}
				let data = p.data;
				let currentData = get(recipeData);
				for (let rp of data) {
					currentData.push(rp);
				}
				recipeData.set(currentData);
				recipeStreamMeta.set({
					...current_meta,
					progress: percent
				});

				// build overview

				if (percent == 100) {
					addNotification(`INFO:Current progress ${percent}%`);
				}
				buildOverviewFromServer();
			}
		}
	},
	stream_data_end: (p) => {
		recipeLoading.set(false);

		// build overview for recipe from server
		//

		// console.log('ending stream');
		buildOverviewFromServer();

		let current_meta = get(recipeStreamMeta);

		let curr_user = get(authStore);

		let user_info: any;
		if (curr_user) {
			user_info = {
				displayName: curr_user.displayName,
				email: curr_user.email,
				uid: curr_user.uid
			};
		}

		// send next chain message
		sendMessage({
			type: 'price',
			payload: {
				action: {
					View: 'sa=all'
				},
				country: current_meta?.country ?? '',
				parameters: '',
				user_info
			}
		});
	},
	stream_data_extra: (p) => {
		// extended data from server, may be extra infos
		//
		// expected last stream_id + count
		let exid = p.exid;
		let extp = p.extp;
		let ex_payload = p.payload;

		if (extp) {
			// know type
			switch (extp) {
				case 'matset':
					let curr_mat_query = get(materialFromServerQuery) ?? [];

					if (!curr_mat_query) {
						curr_mat_query = [];
					}

					// ex_payload has chunks of material setting
					for (let m of ex_payload) {
						let mid = m.id;
						// curr_mat_query[mid] = m;

						curr_mat_query.push(m);
					}

					// // console.log('current materials: ', JSON.stringify(curr_mat_query));
					materialFromServerQuery.set(curr_mat_query);
					break;
				case 'topplist':
					let curr_topping_list_query = get(toppingListFromServerQuery) ?? [];
					if (!curr_topping_list_query) {
						curr_topping_list_query = [];
					}

					for (let t of ex_payload) {
						curr_topping_list_query.push(t);
					}

					toppingListFromServerQuery.set(curr_topping_list_query);

					break;
				case 'toppgrp':
					let curr_topping_group_query = get(toppingGroupFromServerQuery) ?? [];
					if (!curr_topping_group_query) {
						curr_topping_group_query = [];
					}

					for (let t of ex_payload) {
						curr_topping_group_query.push(t);
					}

					toppingGroupFromServerQuery.set(curr_topping_group_query);

					break;
			}
		}
	},
	stream_patch_update: (p) => {},
	notify: (p) => {
		const from = p.from;
		const level = p.level ?? 'INFO';
		const msg = p.msg;
		const target = p.to;

		// Handle list-menu response
		if (from === 'list-menu') {
			const currentUid = auth.currentUser?.uid;
			if (target && currentUid && target === currentUid && p.value) {
				handleListMenuResponse({ codes: p.value });
			}
			return;
		}

		// Handle gen-service responses
		if (from === 'gen-service') {
			switch (level) {
				case 'batch_start':
					handleGenLayoutBatchStart({
						batch_id: p.batch_id,
						total_files: p.total_files,
						total_size_bytes: p.total_size_bytes
					});
					addNotification(`INFO:Gen Layout started (${p.total_files} files)`);
					break;
				case 'file':
					handleGenLayoutFile({
						batch_id: p.batch_id,
						file_index: p.file_index,
						total_files: p.total_files,
						file: p.file,
						content: p.content,
						is_chunked: p.is_chunked,
						part_index: p.part_index,
						total_parts: p.total_parts,
						is_last_part: p.is_last_part
					});
					break;
				case 'batch_end':
					handleGenLayoutBatchEnd({
						batch_id: p.batch_id,
						total_files: p.total_files
					});
					addNotification('INFO:Gen Layout complete');
					break;
				case 'ERROR':
					handleGenLayoutError(msg);
					addNotification(`ERR:Gen Layout error: ${msg}`);
					break;
				default:
					console.log('[GenService] Received:', level, msg);
			}
			return;
		}

		if (from === 'sheet-service' && level === 'content') {
			const currentUid = auth.currentUser?.uid;

			if (target && currentUid && target === currentUid) {
				if (!msg && p.content?.catalogs) {
					handleCatalogsResponse(p.content);
					addNotification(`INFO:Loaded ${p.content.catalogs?.length || 0} catalogs`);
					return;
				}

				// Handle streaming messages (with msg field)
				switch (msg) {
					case 'start':
						handleSheetStreamStart(p);
						addNotification('INFO:Sheet data streaming started');
						break;
					case 'chunk':
						handleSheetStreamChunk(p);
						break;
					case 'end':
						handleSheetStreamEnd(p);
						addNotification('INFO:Sheet data streaming complete');
						break;
					case 'error':
						handleSheetStreamError(p);
						addNotification(`ERR:Sheet streaming error: ${p.content?.error_detail}`);
						break;
					default:
						// Handle other content notifications from sheet-service
						console.log('[Sheet] Received content:', p.content);
				}
			}
			return;
		}

		// Default notification handling
		let from_service = p.from ?? '';
		let ref_service = p.ref ?? '';

		if (target) {
			let currentUsername = auth.currentUser?.displayName;
			if (currentUsername && currentUsername === target) {
				addNotification(`${level}:${msg}`);
			}
		} else {
			// broadcast to all
			addNotification(`${level}:${msg}`);
		}
	},
	ui_action: (p) => {
		if (p.action == 'refreshNow' && p.from == 'brew') {
			goto('/tools/brew');
		}
	},
	version_selectors: (p) => {
		if (p.versions.length > 0) {
			currentRecipeVersionsSelector.set([]);
			let result: RecipeVersion[] = [];

			for (let vstr of p.versions) {
				let pure_version = vstr.split('_')[0];

				result.push({
					display_version: pure_version,
					actual_version_name: vstr
				});
			}

			currentRecipeVersionsSelector.set(result);
		}
	},
	price: (p) => {
		let req_action = p.req_action;
		let status = p.status;
		let to = p.to;

		let content: RecipePrice[] = p.content ?? [];

		console.log('get price length: ', content.length);

		let current_price = get(priceRecipeData);
		let lastRequestPriceInstance = get(lastRequestSheetPrice);
		let saved_product_code_to_get_from_sheet = [];
		let current_meta = get(recipeStreamMeta);
		lastRequestPriceInstance[current_meta?.country ?? 'unknown'] = {};
		for (const c of content) {
			current_price[c.ProductCode] = c.NewPrice + (c.StringParam ? `,${c.StringParam}` : '');
			lastRequestPriceInstance[current_meta?.country ?? 'unknown'][c.ProductCode] = '';
			saved_product_code_to_get_from_sheet.push({
				product_code: c.ProductCode
			});
		}

		priceRecipeData.set(current_price);

		console.log('check length', saved_product_code_to_get_from_sheet.length);
		// set command request to stream mode so
		let request_id = uuidv4();

		lastRequestPriceInstance[request_id] = current_meta?.country ?? '';
		let current_streaming_instance = get(streamingRawData);
		current_streaming_instance[request_id] = '';
		streamingRawData.set(current_streaming_instance);

		sendCommandRequest('sheet', {
			country: current_meta?.country ?? '',
			content: saved_product_code_to_get_from_sheet,
			param: 'price',
			stream: true,
			request_id
		});

		lastRequestSheetPrice.set(lastRequestPriceInstance);
	},
	raw_stream: (p) => {
		let streamRawInstance = get(streamingRawData);
		let sub_type = p.sub_type;
		let request_id = p.request_id;
		let size_per_chunk = p.size_per_chunk;
		let total_chunks = p.total_chunks;
		let idx = p.idx;

		switch (sub_type) {
			case 'price':
				streamingRawMeta.set({
					id: request_id,
					total_size: total_chunks,
					chunk_size: size_per_chunk,
					progress: 0
				});
				break;
			case 'chunk_price':
				streamingRawMeta.set({
					id: request_id,
					total_size: total_chunks,
					chunk_size: size_per_chunk,
					progress: idx
				});

				let raw_payload = p.raw ?? '';
				streamRawInstance[request_id] += raw_payload;
				streamingRawData.set(streamRawInstance);

				break;
			case 'end_price':
				let lastRequestPriceInstance = get(lastRequestSheetPrice);
				let country = lastRequestPriceInstance[request_id];

				try {
					let raw_payload = JSON.parse(streamRawInstance[request_id]);
					let ref_from_raw = raw_payload.payload.ref ?? '';
					let from_service_raw = raw_payload.payload.from ?? '';
					let parsed_payload = raw_payload.payload ?? '';

					if (from_service_raw == 'sheet-service') {
						handleSheetResponseFromNoti(parsed_payload, ref_from_raw, country);
						delete streamRawInstance[request_id];
						streamingRawData.set(streamRawInstance);
					}
				} catch (e) {
					console.log(`end price process error: ${e}`);
				}

				break;
			default:
		}
	},
	heartbeat: (p) => {
		socketConnectionOfflineCount.set(0);
		socketAlreadySendHeartbeat.set(0);
		console.log('heartbeat reset offline count');
	},
	// Raw stream handlers for sheet data (e.g., price)
	raw_stream: (p) => {
		// Format: raw_stream with subtype in payload
		// Header: { subtype: 'price', request_id, header?, country? }
		const subtype = p.subtype;
		if (subtype) {
			handleRawStreamHeader(subtype, p);
		}
	},
	raw_stream_price: (p) => {
		// Header for price stream
		handleRawStreamHeader('price', p);
	},
	raw_stream_chunk_price: (p) => {
		// Chunk for price stream
		handleRawStreamChunk('price', p);
	},
	raw_stream_end_price: (p) => {
		// End for price stream
		handleRawStreamEnd('price', p);
	}
};

export function handleIncomingMessages(raw: string) {
	const msg: WSMessage = JSON.parse(raw);
	// console.log(`[WS MSG] type=${msg.type}`, msg.payload);
	if (msg == null) {
		// error response
		addNotification('ERR:No response from server');
		return;
	}

	// raw streaming type
	if (msg.type.startsWith('raw_stream')) {
		// convert
		let sub_type = msg.type.replace('raw_stream_', '');
		msg.payload.sub_type = sub_type;
		msg.type = 'raw_stream';
	}

	handlers[msg.type]?.(msg.payload);
}