import { Plugin } from "frontblock-generic/Plugin";
import { socketioRPC } from "frontblock-generic/RPC";
import { GitUpdater, RepoFolderStatus } from "./GitUpdater";
import { FrontblockCherryPicker } from "git-cherrypicker";
import * as Logger from 'log4js'
import * as path from "path";
import * as rmrf from "rimraf"
import { FrontblockAdmin } from "./FrontblockAdmin";
import { TableDefiniton } from "frontblock-generic/Admin";
import { promises as fs, mkdirSync as mkdir } from "fs"
import { version } from "punycode";
import * as git from "simple-git/promise"
import * as trash from "trash"
import { type } from "os";

var exec = require('child-process-promise').exec;

Logger.configure({
    appenders: 
    {
    "admin/updatemanager": { type: 'stdout' },
    //app: { type: 'file', filename: 'application.log' }
    },
    categories: 
    {
    default: { appenders: [ 'admin/updatemanager' ], level: 'debug' }
    }
})
const logger = Logger.getLogger("admin/updatemanager") 

export class UpdateManager extends Plugin{
    
    private loadedPlugins:{[name in string]:Plugin} = {}
    private dashboardUpdater:GitUpdater
    private adminUpdater:GitUpdater
    private pluginUpdaters:{[name in string]:GitUpdater} = {}

    constructor(admin:FrontblockAdmin){
        super(admin, "UpdateManager")
    }

    getDefaultConfig(): {} {
        return {}
    }

    exportRPCs(): socketioRPC[] {
        return [{
            name: 'installPlugin',
            func: async (name:string, force = false) => {return await this.installPlugin(name, force)},
            type: 'call',
            visibility: 'private'
        },{
            name: 'startPlugin',
            func: async (name:string) => {return await this.startPlugin(name)},
            type: 'call',
            visibility: 'private'
        },{
            name: 'updatePlugin',
            func: async (name) => {return await this.updatePlugin(name)},
            type: 'call',
            visibility: 'private'
        },{
            name: 'setPluginVersion',
            func: async (name, tag) => {return await this.setPluginVersion(name, tag)},
            type: 'call',
            visibility: 'private'
        },{
            name: 'updateDashboard',
            func: async () => {return await this.updateDashboard()},
            type: 'call',
            visibility: 'private'
        },{
            name: 'getLoadedPluginNames',
            func: async () => {return await this.getLoadedPluginNames()},
            type: 'call',
            visibility: 'private'
        }]
    }

    getTableDefinitions(): TableDefiniton[] {
        return []
    }

    async updatePlatformDependencies(){

        logger.info("installing npm stuff")

/*
        const res = await exec('npm install --prefix ./plugins knex sqlite3')
        logger.warn(res.stderr)
        logger.info(res.stdout)
*/      
        await Promise.all([
            new NPMExtension("knex@0.19.2", "./plugins").install(),
            new NPMExtension("sqlite3@4.1.0", "./plugins").install()
        ])
    }

    async updateAdmin(force:boolean = false){
        this.adminUpdater = new GitUpdater("./dist")
        let status = await this.adminUpdater.getStatus()
        if(force || !status.remote || !status.remote.includes("fb-dist/admin") || !status.exists || status.empty || !status.currentTag){
            logger.warn("Cloning fb-dist/admin into ./dist ..."+(force?" USING FORCE!":""))
            status = await this.adminUpdater.cloneRepo("https://gitea.frontblock.me/fb-dist/admin.git", force)
        }
        return status
    }

    async updateFrontblockLib(){
        logger.warn("Picking FrontblockLib...")
        await (new FrontblockCherryPicker("fb-dist/admin", "master", "FrontblockLib.js")).write("./static/FrontblockLib.js")
    }

    async updateDashboard(force:boolean = false):Promise<RepoFolderStatus>{
        this.dashboardUpdater = new GitUpdater("./static")
        let status = await this.dashboardUpdater.getStatus()
        if(force || !status.exists || status.empty || !status.currentTag){
            logger.warn("Cloning fb-dist/dashboard into ./static ..."+(force?" USING FORCE!":""))
            status = await this.dashboardUpdater.cloneRepo("https://gitea.frontblock.me/fb-dist/dashboard.git", force)
        }
        return status
    }


    async startPlugin(name:string):Promise<boolean>{
        if(!this.pluginUpdaters[name]) return false
        const status = await this.pluginUpdaters[name].getStatus()
        if(!status.exists || status.empty || !status.tags || status.tags.length === 0){
            if(status.currentTag && !status.latestTag){
                //git glitches sometimes if you check immediately after clone
                logger.warn("re-fetching tag for "+name+"...")
                return await this.startPlugin(name)
            }
            logger.error("Bad repo status", name, status)
            return false
        }

        if(this.loadedPlugins[name]){
            logger.error("Plugin", name, "is already started")
            return false
        }


        let str = "../plugins/"+name+"/Plugin"
        const pluginClass = await eval('require')(str)
        const pluginObj = new pluginClass.default()
        await pluginObj.start()
        this.admin.addPlugin(pluginObj)
        this.loadedPlugins[name] = pluginObj
        return true
    }

    async updatePlugin(name:string):Promise<boolean>{
        if(!this.pluginUpdaters[name]) return false
        const status = await this.pluginUpdaters[name].getStatus()
        if(!status.exists || status.empty || !status.tags || status.tags.length === 0){
            logger.error("Bad repo status", name, status)
            return false
        }
        if(status.currentTag == status.latestTag){
            logger.warn(name, "already at latest tag")
            return false
        }

        if(this.loadedPlugins[name]){
            logger.error("Plugin", name, "is running. Stop it first")
            return false
        }

        this.pluginUpdaters[name].checkoutTag(status.latestTag!)
        return true
    }

    async setPluginVersion(pluginName:string, tag:string):Promise<RepoFolderStatus>{
        const status = await this.pluginUpdaters[pluginName].getStatus()
        if(!status.exists || !status.tags || status.tags.length === 0 || !status.tags.includes(tag)){
            logger.error("Bad repo status", pluginName, status)
            return status
        }

        return await this.pluginUpdaters[pluginName].checkoutTag(tag)
    }

    getLoadedPlugins():Plugin<any>[]{
        return Object.values(this.loadedPlugins)
    }

    getLoadedPluginNames():string[]{
        return Object.keys(this.loadedPlugins)
    }
}