const App = require('../../../models/App');
const axios = require('axios');
const Logger = require('../../../utils/Logger');
const logger = new Logger();
const loadConfig = require('../../../utils/loadConfig');

const useDocker = async (apps) => {
  const {
    useOrdering: orderType,
    unpinStoppedApps,
    dockerHost: host,
  } = await loadConfig();

  const dockerApps = [];

  let containers = null;
  let containers_swarm = null;

  function addApp(dockerApps, labels){
    // add each container as flame formatted app
    if (
      'flame.name' in labels &&
      'flame.url' in labels &&
      /^app/.test(labels['flame.type'])
    ) {
      for (let i = 0; i < labels['flame.name'].split(';').length; i++) {
        const names = labels['flame.name'].split(';');
        const urls = labels['flame.url'].split(';');
        let icons = '';

        if ('flame.icon' in labels) {
          icons = labels['flame.icon'].split(';');
        }

        dockerApps.push({
          name: names[i] || names[0],
          url: urls[i] || urls[0],
          icon: icons[i] || 'docker',
        });
      }
    }
  }

  // Get list of containers
  try {
    if (host.includes('localhost')) {
      // Use default host
      function getDocker(){
        return axios.get(
          `http://${host}/containers/json?{"status":["running"]}`,
          {
            socketPath: '/var/run/docker.sock',
          }
        );
      }
      function getSwarm(){
        return axios.get(
          `http://${host}/services`,
          {
            socketPath: '/var/run/docker.sock',
          }
        );
      }

      [ containers, containers_swarm ] = await Promise.all(
        [getDocker(),
          getSwarm()
        ]);

    } else {
      // Use custom host
      let { data } = await axios.get(
        `http://${host}/containers/json?{"status":["running"]}`
      );

      containers = data;
    }
  } catch {
    logger.log(`Can't connect to the Docker API on ${host}`, 'ERROR');
  }

  if (containers_swarm) {
    apps = await App.findAll({
      order: [[orderType, 'ASC']],
    });

    services = containers_swarm.data;
    for (const service of services) {
      let labels = service.Spec.Labels;

      labels['flame.name'] = service.Spec.Name;
      labels['flame.type'] = 'application';
      if (!('flame.url' in labels)) {
        for (const label of Object.keys(labels)) {
          if (/^traefik.*.frontend.rule/.test(label)) {
            // Traefik 1.x
            let value = labels[label];

            if (value.indexOf('Host') !== -1) {
              value = value.split('Host:')[1];
              labels['flame.url'] =
                'https://' + value.split(',').join(';https://');
            }
          } else if (/^traefik.*?\.rule/.test(label)) {
            // Traefik 2.x
            const value = labels[label];

            if (value.indexOf('Host') !== -1) {
              const regex = /\`([a-zA-Z0-9\.\-]+)\`/g;
              const domains = [];

              while ((match = regex.exec(value)) != null) {
                domains.push('http://' + match[1]);
              }

              if (domains.length > 0) {
                labels['flame.url'] = domains.join(';');
              }
            }
          }
        }
      }
      addApp(dockerApps, labels);
    }
  }

  if (containers) {
    apps = await App.findAll({
      order: [[orderType, 'ASC']],
    });

    // Filter out containers without any annotations
    containers = containers.data.filter((e) => Object.keys(e.Labels).length !== 0);

    for (const container of containers) {
      let labels = container.Labels;
      if(!('com.docker.stack.namespace' in labels)){
        console.log(container)
        labels['flame.name'] = container.Names[0];
        labels['flame.type'] = 'application';
      // Traefik labels for URL configuration
        if (!('flame.url' in labels)) {
          for (const label of Object.keys(labels)) {
            if (/^traefik.*.frontend.rule/.test(label)) {
              // Traefik 1.x
              let value = labels[label];

              if (value.indexOf('Host') !== -1) {
                value = value.split('Host:')[1];
                labels['flame.url'] =
                  'https://' + value.split(',').join(';https://');
              }
            } else if (/^traefik.*?\.rule/.test(label)) {
              // Traefik 2.x
              const value = labels[label];

              if (value.indexOf('Host') !== -1) {
                const regex = /\`([a-zA-Z0-9\.\-]+)\`/g;
                const domains = [];

                while ((match = regex.exec(value)) != null) {
                  domains.push('http://' + match[1]);
                }

                if (domains.length > 0) {
                  labels['flame.url'] = domains.join(';');
                }
              }
            }
          }
        }
      }
      addApp(dockerApps, labels);
    }
  }

  if (unpinStoppedApps) {
    for (const app of apps) {
      await app.update({ isPinned: false });
    }
  }
  for (const item of dockerApps) {
    // If app already exists, update it
    if (apps.some((app) => app.name === item.name)) {
      const app = apps.find((a) => a.name === item.name);

      if (
        item.icon === 'custom' ||
        (item.icon === 'docker' && app.icon != 'docker')
      ) {
        // update without overriding icon
        await app.update({
          name: item.name,
          url: item.url,
          isPinned: true,
        });
      } else {
        await app.update({
          ...item,
          isPinned: true,
        });
      }
    } else {
      // else create new app
      await App.create({
        ...item,
        icon: item.icon === 'custom' ? 'docker' : item.icon,
        isPinned: true,
      });
    }
  }

};

module.exports = useDocker;