import { inspect } from 'util';
import Ajv from 'ajv';
import * as yaml from 'js-yaml';
import * as check from '../check';
import { ValidationError } from '../error';
import {
    isEmail, isPassword, isUname, validate,
} from '../lib/validator';
import { Logger } from '../logger';
import { PRIV, STATUS } from '../model/builtin';
import domain from '../model/domain';
import record from '../model/record';
import * as setting from '../model/setting';
import * as system from '../model/system';
import user from '../model/user';
import * as bus from '../service/bus';
import {
    Connection, ConnectionHandler, Handler,
    param, Route, Types,
} from '../service/server';
import { schema } from '../settings';
import * as judge from './judge';

const logger = new Logger('manage');
const ajv = new Ajv({ useDefaults: true });
const validator = ajv.compile<any>(schema);

function set(key: string, value: any) {
    if (setting.SYSTEM_SETTINGS_BY_KEY[key]) {
        const s = setting.SYSTEM_SETTINGS_BY_KEY[key];
        if (s.flag & setting.FLAG_DISABLED) return undefined;
        if ((s.flag & setting.FLAG_SECRET) && !value) return undefined;
        if (s.type === 'boolean') {
            if (value === 'on') return true;
            return false;
        }
        if (s.type === 'number') {
            if (!Number.isSafeInteger(+value)) throw new ValidationError(key);
            return +value;
        }
        if (s.subType === 'yaml') {
            try {
                yaml.load(value);
            } catch (e) {
                throw new ValidationError(key);
            }
        }
        return value;
    }
    return undefined;
}

class SystemHandler extends Handler {
    async prepare() {
        this.checkPriv(PRIV.PRIV_EDIT_SYSTEM);
    }
}

class SystemMainHandler extends SystemHandler {
    async get() {
        this.response.redirect = '/manage/dashboard';
    }
}

class SystemCheckConnHandler extends ConnectionHandler {
    id: string;

    async prepare() {
        this.checkPriv(PRIV.PRIV_EDIT_SYSTEM);
        await this.check();
    }

    async check() {
        const log = (payload: any) => this.send({ type: 'log', payload });
        const warn = (payload: any) => this.send({ type: 'warn', payload });
        const error = (payload: any) => this.send({ type: 'error', payload });
        await check.start(this, log, warn, error, (id) => { this.id = id; });
    }

    async cleanup() {
        check.cancel(this.id);
    }
}

class SystemDashboardHandler extends SystemHandler {
    async get() {
        this.response.template = 'manage_dashboard.html';
    }
}

class SystemScriptHandler extends SystemHandler {
    async get() {
        this.response.template = 'manage_script.html';
        this.response.body.scripts = global.Hydro.script;
    }

    @param('id', Types.Name)
    @param('args', Types.Content, true)
    async post(domainId: string, id: string, raw = '{}') {
        if (!global.Hydro.script[id]) throw new ValidationError('id');
        const args = JSON.parse(raw);
        validate(global.Hydro.script[id].validate, args);
        const rid = await record.add(domainId, -1, this.user._id, '-', id, false, raw);
        const report = (data) => judge.next({ domainId, rid, ...data });
        report({ message: `Running script: ${id} `, status: STATUS.STATUS_JUDGING });
        const start = new Date().getTime();
        // Maybe async?
        global.Hydro.script[id].run(args, report)
            .then((ret: any) => {
                const time = new Date().getTime() - start;
                judge.end({
                    domainId,
                    rid,
                    status: STATUS.STATUS_ACCEPTED,
                    message: inspect(ret, false, 10, true),
                    judger: 1,
                    time,
                    memory: 0,
                });
            })
            .catch((err: Error) => {
                const time = new Date().getTime() - start;
                logger.error(err);
                judge.end({
                    domainId,
                    rid,
                    status: STATUS.STATUS_SYSTEM_ERROR,
                    message: `${err.message} \n${(err as any).params || []} \n${err.stack} `,
                    judger: 1,
                    time,
                    memory: 0,
                });
            });
        this.response.body = { rid };
        this.response.redirect = this.url('record_detail', { rid });
    }
}

class SystemSettingHandler extends SystemHandler {
    async get() {
        this.response.template = 'manage_setting.html';
        this.response.body.current = {};
        this.response.body.settings = setting.SYSTEM_SETTINGS;
        for (const s of this.response.body.settings) {
            this.response.body.current[s.key] = system.get(s.key);
        }
        const hide = [];
        const raw = system.get('_') || '';
        let config = yaml.load(raw);
        const valid = validator(config);
        if (!(raw.trim() && valid)) {
            const data = {};
            for (const key in schema.properties) {
                data[key] = {};
                for (const subkey in (schema.definitions[key] as any).properties || {}) {
                    if (system.get(`${key}.${subkey}`)) {
                        data[key][subkey] = system.get(`${key}.${subkey}`);
                        if ((schema.definitions[key] as any).properties[subkey]?.writeOnly) {
                            if (data[key][subkey] instanceof Array) {
                                hide.push(...data[key][subkey]);
                            } else hide.push(data[key][subkey]);
                        }
                    }
                }
            }
            validator(data);
            config = yaml.dump(data);
        } else config = yaml.dump(config);
        this.response.body.hide = hide;
        this.response.body.config = config;
    }

    async post(args: any) {
        const tasks = [];
        const booleanKeys = args.booleanKeys || {};
        delete args.booleanKeys;
        if (args._) {
            if (typeof args._ !== 'string') throw new ValidationError('config');
            try {
                const payload = yaml.load(args._);
                const valid = validator(payload);
                if (!valid) {
                    throw new ValidationError('config', null, validator.errors[0]);
                }
                for (const key in payload) {
                    for (const subkey in payload[key]) {
                        tasks.push(system.set(`${key}.${subkey}`, payload[key][subkey]));
                    }
                }
            } catch (e) {
                throw new ValidationError('config', null, e.message);
            }
            await system.set('_', args._);
            delete args._;
        }
        for (const key in args) {
            if (typeof args[key] === 'object') {
                for (const subkey in args[key]) {
                    const val = set(`${key}.${subkey}`, args[key][subkey]);
                    if (val !== undefined) {
                        tasks.push(system.set(`${key}.${subkey}`, val));
                    }
                }
            }
        }
        for (const key in booleanKeys) {
            if (typeof booleanKeys[key] === 'object') {
                for (const subkey in booleanKeys[key]) {
                    if (!args[key][subkey]) tasks.push(system.set(`${key}.${subkey}`, false));
                }
            }
        }
        tasks.push(bus.parallel('system/setting', args));
        await Promise.all(tasks);
        this.back();
    }
}

class SystemSettingSchemaHandler extends SystemHandler {
    async get() {
        this.response.body = JSON.stringify(schema);
        this.response.type = 'application/json';
    }
}

class SystemUserImportHandler extends SystemHandler {
    async get() {
        this.response.body.users = [];
        this.response.template = 'manage_user_import.html';
    }

    @param('users', Types.Content)
    @param('draft', Types.Boolean)
    async post(domainId: string, _users: string, draft: boolean) {
        const users = _users.split('\n');
        const udocs = [];
        const messages = [];
        for (const i in users) {
            const u = users[i];
            if (!u.trim()) continue;
            let [email, username, password, displayName] = u.split(',').map((t) => t.trim());
            if (!email || !username || !password) [email, username, password, displayName] = u.split('\t').map((t) => t.trim());
            if (email && username && password) {
                if (!isEmail(email)) messages.push(`Line ${+i + 1}: Invalid email.`);
                else if (!isUname(username)) messages.push(`Line ${+i + 1}: Invalid username`);
                else if (!isPassword(password)) messages.push(`Line ${+i + 1}: Invalid password`);
                // eslint-disable-next-line no-await-in-loop
                else if (await user.getByEmail('system', email)) {
                    messages.push(`Line ${+i + 1}: Email ${email} already exists.`);
                    // eslint-disable-next-line no-await-in-loop
                } else if (await user.getByUname('system', username)) {
                    messages.push(`Line ${+i + 1}: Username ${username} already exists.`);
                } else {
                    udocs.push({
                        email, username, password, displayName,
                    });
                }
            } else messages.push(`Line ${+i + 1}: Input invalid.`);
        }
        messages.push(`${udocs.length} users found.`);
        if (!draft) {
            for (const {
                email, username, password, displayName,
            } of udocs) {
                try {
                    // eslint-disable-next-line no-await-in-loop
                    const uid = await user.create(email, username, password);
                    // eslint-disable-next-line no-await-in-loop
                    if (displayName) await domain.setUserInDomain(domainId, uid, { displayName });
                } catch (e) {
                    messages.push(e.message);
                }
            }
        }
        this.response.body.users = udocs;
        this.response.body.messages = messages;
    }
}

async function apply() {
    Route('manage', '/manage', SystemMainHandler);
    Route('manage_dashboard', '/manage/dashboard', SystemDashboardHandler);
    Route('manage_script', '/manage/script', SystemScriptHandler);
    Route('manage_setting', '/manage/setting', SystemSettingHandler);
    Route('manage_setting_schema', '/manage/setting/schema.json', SystemSettingSchemaHandler);
    Route('manage_user_import', '/manage/userimport', SystemUserImportHandler);
    Connection('manage_check', '/manage/check-conn', SystemCheckConnHandler);
}

global.Hydro.handler.manage = apply;