const Docker = require('dockerode');
const db = require('./mongo.js');
const docker = new Docker({
    'socketPath': '/home/docker.sock'
});
const path = require('path');
const fs = require('fs');
const PROJECT_PATH = process.env.PROJECT_PATH;

module.exports = function(job){
    
    const logFile = path.resolve(__dirname, 'proc-logs', `${job.data.id}.log`);

    const scenarioPath = path.join(PROJECT_PATH, '..', 'qmi-cloud-provisions', `${job.data.scenario}_${job.data.id}`);
    const templatePath = path.join(PROJECT_PATH, 'server', 'scenarios_templates', job.data.scenario);

    db.provision.update({
        "id":job.data.id, 
        "body":{
            "status": "initializing", 
            "jobId": job.id, 
            "logFile": `/proc-logs/${job.data.id}.log`,
            "path": scenarioPath
        }
    });

    // TERRAFORM INIT
    const initContName = `qmi-tf-init-${job.data.id}`;
    const provContName = `qmi-tf-apply-${job.data.id}`;
    console.log(`Processor Apply: will spin up container: '${initContName}'`);
    var processStream = fs.createWriteStream(logFile, {flags:'a'});

    return docker.run('hashicorp/terraform:0.12.14', ['init', '-no-color', '-from-module=/template'], processStream, { 
        "Env": ["NODE_ENV=development"],
        "name": initContName,
        "WorkingDir": "/app",
        "HostConfig": {
            "Binds": [
                `${scenarioPath}:/app`,
                `${templatePath}:/template` 
            ]
        }
    }).then(function(data) {
        var output = data[0];
        var container = data[1];
        console.log(`Processor Apply: '${initContName}' (${container.id}) has finished with code: ${output.StatusCode}`);
        return container.remove();
    }).then(function(data) {
        console.log(`Processor Apply: '${initContName}' removed!`);
        var update = db.provision.update({"id":job.data.id, "body":{"status": "provisioning"}});
        return update;
    }).then(function(mongoUpdated) {
        
        // TERRAFORM APPLY
        console.log(`Processor Apply: will spin up container: '${provContName}'`);
        var processStream2 = fs.createWriteStream(logFile, {flags:'a'});
        
        return docker.run('hashicorp/terraform:0.12.14', ['apply', '-no-color', '-var-file=scenario.tfvars', '-var', `provision_id=${job.data.id}`, '-auto-approve'], processStream2, { 
            "Env": ["NODE_ENV=development"],
            "name": provContName,
            "WorkingDir": "/app",
            "HostConfig": {
                "Binds": [
                    `${scenarioPath}:/app`
                ],
                "NetworkMode": "host"
            }
        })
    }).then(function(data){
        var output = data[0];
        var container = data[1];
        console.log(`Processor Apply: '${provContName}' (${container.id}) has finished with code: ${output.StatusCode}`);
        return container.remove();
    }).then(function(data) {
        console.log(`Processor Apply: '${provContName}' removed!`);
        var update = db.provision.update({"id":job.data.id, "body":{"status": "provisioned"}});
        return update;
    }).then(function(mongoUpdated){
        return Promise.resolve({"success": true, job: mongoUpdated});
    }).catch(function(err) {
        console.log("Processor Apply: err", err);
        db.provision.update({"id":job.data.id, "body":{"status": "error"}});
        return Promise.reject({"success": false, "err": err});
    });
    
}