import { List, Map } from 'immutable'; 
import { clean as cleanParams } from 'App/api_client';
import ErrorInfo, { RESOLVED, UNRESOLVED, IGNORED } from 'Types/errorInfo';
import { createFetch, fetchListType, fetchType } from './funcTools/crud';
import { createRequestReducer, ROOT_KEY } from './funcTools/request';
import { array, request, success, failure, createListUpdater, mergeReducers } from './funcTools/tools';

const name = "error";
const idKey = "errorId";

const FETCH_LIST = fetchListType(name);
const FETCH = fetchType(name);
const FETCH_NEW_ERRORS_COUNT = fetchType('errors/FETCH_NEW_ERRORS_COUNT');
const RESOLVE = "errors/RESOLVE";
const UNRESOLVE = "errors/UNRESOLVE";
const IGNORE = "errors/IGNORE";
const MERGE = "errors/MERGE";
const TOGGLE_FAVORITE = "errors/TOGGLE_FAVORITE";
const FETCH_TRACE = "errors/FETCH_TRACE";
const UPDATE_CURRENT_PAGE = "errors/UPDATE_CURRENT_PAGE";

function chartWrapper(chart = []) {
  return chart.map(point => ({ ...point, count: Math.max(point.count, 0) }));
}

const updateItemInList = createListUpdater(idKey);
const updateInstance = (state, instance) => state.getIn([ "instance", idKey ]) === instance[ idKey ]
	? state.mergeIn([ "instance" ], instance)
	: state;

const initialState = Map({
	totalCount: 0,
	list: List(),
	instance: ErrorInfo(),
	instanceTrace: List(),
	stats: Map(),
	sourcemapUploaded: true,
  currentPage: 1,
});


function reducer(state = initialState, action = {}) {
	let updError;
	switch (action.type) {
		case success(FETCH):
			return state.set("instance", ErrorInfo(action.data));
		case success(FETCH_TRACE):
			return state.set("instanceTrace", List(action.data.trace)).set('sourcemapUploaded', action.data.sourcemapUploaded);
		case success(FETCH_LIST):
			const { data } = action;
			return state
				.set("totalCount", data ? data.total : 0)
				.set("list", List(data && data.errors).map(ErrorInfo)
					.filter(e => e.parentErrorId == null)
					.map(e => e.update("chart", chartWrapper)));
		case success(RESOLVE):
			updError = { errorId: action.id, status: RESOLVED };
			return updateItemInList(updateInstance(state, updError), updError);
		case success(UNRESOLVE):
			updError = { errorId: action.id, status: UNRESOLVED };
			return updateItemInList(updateInstance(state, updError), updError);
		case success(IGNORE):
			updError = { errorId: action.id, status: IGNORED };
			return updateItemInList(updateInstance(state, updError), updError);
		case success(TOGGLE_FAVORITE):
			return state.mergeIn([ "instance" ], { favorite: !state.getIn([ "instance", "favorite" ]) })
		case success(MERGE):
			const ids = action.ids.slice(1);
			return state.update("list", list => list.filter(e => !ids.includes(e.errorId)));
		case success(FETCH_NEW_ERRORS_COUNT):
			return state.set('stats', action.data);
    case UPDATE_CURRENT_PAGE:
      return state.set('currentPage', action.page);
	}
	return state;
}

export default mergeReducers(
	reducer,
	createRequestReducer({
		[ ROOT_KEY ]: FETCH_LIST,
		fetch: FETCH,
		fetchTrace: FETCH_TRACE,
		resolve: RESOLVE,
		unresolve: UNRESOLVE,
		ignore: IGNORE,
		merge: MERGE,
		toggleFavorite: TOGGLE_FAVORITE,
	}),
);


export function fetch(id) {
	return {
		id,
		types: array(FETCH),
		call: c => c.get(`/errors/${id}`),
	}
}

export function fetchTrace(id) {
	return {
		id,
		types: array(FETCH_TRACE),
		call: c => c.get(`/errors/${id}/sourcemaps`),
	}
}

export function fetchList(params = {}, clear = false) {
  return {
    types: array(FETCH_LIST),
    call: client => client.post('/errors/search', params),
    clear,
    params: cleanParams(params),
  };
}

export function fetchBookmarks() {
	return {
		types: array(FETCH_LIST),
		call: client => client.post('/errors/search?favorite', {})
	}
}

export function resolve(id) {
	return {
		types: array(RESOLVE),
		id,
		call: client => client.get(`/errors/${ id }/solve`),
	}
}

export function unresolve(id) {
	return {
		types: array(UNRESOLVE),
		id,
		call: client => client.get(`/errors/${ id }/unsolve`),
	}
}

export function ignore(id) {
	return {
		types: array(IGNORE),
		id,
		call: client => client.get(`/errors/${ id }/ignore`),
	}
}

export function merge(ids) {
	return {
		types: array(MERGE),
		ids,
		call: client => client.post(`/errors/merge`, { errors: ids }),
	}
}

export function toggleFavorite(id) {
	return {
		types: array(TOGGLE_FAVORITE),
		id,
		call: client => client.get(`/errors/${ id }/favorite`),
	}
}

export function fetchNewErrorsCount(params = {}) {
	return {
		types: array(FETCH_NEW_ERRORS_COUNT),
		call: client => client.get(`/errors/stats`, params),
	}
}

export function updateCurrentPage(page) {
  return {
    type: 'errors/UPDATE_CURRENT_PAGE',
    page,
  };
}