import * as _ from 'lodash';

import { Character as ComplexCharacter } from '../../site/character_page/interfaces';
import { CharacterAnalysis } from '../matcher';
import { PermanentIndexedStore, ProfileRecord } from './sql-store';


async function promisifyRequest<T>(req: IDBRequest): Promise<T> {
    return new Promise<T>((resolve, reject) => {
        req.onsuccess = () => resolve(<T>req.result);
        req.onerror = () => reject(req.error);
    });
}


export class IndexedStore implements PermanentIndexedStore {
    protected dbName: string;
    protected db: IDBDatabase;

    protected static readonly STORE_NAME = 'profiles';

    constructor(db: IDBDatabase, dbName: string) {
        this.dbName = dbName;
        this.db = db;
    }

    static async open(dbName: string = 'flist-ascending-profiles'): Promise<IndexedStore> {
        const request = window.indexedDB.open(dbName, 1);

        request.onupgradeneeded = () => {
            const db = request.result;

            db.createObjectStore(IndexedStore.STORE_NAME, { keyPath: 'id' });
        };

        return new IndexedStore(await promisifyRequest<IDBDatabase>(request), dbName);
    }


    // tslint:disable-next-line prefer-function-over-method
    protected toProfileId(name: string): string {
        return name.toLowerCase();
    }


    async getProfile(name: string): Promise<ProfileRecord | undefined> {
        const tx = this.db.transaction(IndexedStore.STORE_NAME, 'readonly');
        const store = tx.objectStore(IndexedStore.STORE_NAME);
        const getRequest = store.get(this.toProfileId(name));

        // tslint:disable-next-line no-any
        const data = await promisifyRequest<any>(getRequest);

        if (!data) {
            // console.info('IDX empty profile', name);
            return;
        }

        // tslint:disable-next-line: no-unsafe-any
        data.profileData = data.profileData as ComplexCharacter;

        // console.log('IDX profile', name, data);

        return data as ProfileRecord;
    }


    async prepareProfileData(c: ComplexCharacter): Promise<ProfileRecord> {
        const existing = await this.getProfile(c.character.name);
        const ca = new CharacterAnalysis(c.character);

        const data: ProfileRecord = {
            id: this.toProfileId(c.character.name),
            name: c.character.name,
            profileData: c,
            firstSeen: Math.round(Date.now() / 1000),
            lastFetched: Math.round(Date.now() / 1000),
            gender: ca.gender,
            orientation: ca.orientation,
            furryPreference: ca.furryPreference,
            species: ca.species,
            age: ca.age,
            domSubRole: null, // domSubRole
            position: null, // position
            lastCounted: null,
            guestbookCount: null,
            friendCount: null,
            groupCount: null
        };

        return (existing)
            ? _.merge(existing, data, _.pick(existing, ['firstSeen', 'lastCounted', 'guestbookCount', 'friendCount', 'groupCount']))
            : data;
    }


    async storeProfile(c: ComplexCharacter): Promise<void> {
        const data = await this.prepareProfileData(c);

        const tx = this.db.transaction(IndexedStore.STORE_NAME, 'readwrite');
        const store = tx.objectStore(IndexedStore.STORE_NAME);
        const putRequest = store.put(data);

        // tslint:disable-next-line no-any
        await promisifyRequest<any>(putRequest);

        // console.log('IDX store profile', c.character.name, data);
    }


    async updateProfileCounts(
        name: string,
        guestbookCount: number | null,
        friendCount: number | null,
        groupCount: number | null
    ): Promise<void> {
        const existing = await this.getProfile(name);

        if (!existing) {
            return;
        }

        const data = _.merge(
            existing,
            {
                lastCounted: Math.round(Date.now() / 1000),
                guestbookCount,
                friendCount,
                groupCount
            }
        );

        const tx = this.db.transaction(IndexedStore.STORE_NAME, 'readwrite');
        const store = tx.objectStore(IndexedStore.STORE_NAME);
        const putRequest = store.put(data);

        // tslint:disable-next-line no-any
        await promisifyRequest<any>(putRequest);

        // console.log('IDX update counts', name, data);
    }

    async start(): Promise<void> {
        // empty
    }

    async stop(): Promise<void> {
        // empty
    }
}