import Ember from 'ember';
import Response from 'ember-cli-mirage/response';
import { HOSTS } from './common';
import { logFrames, logEncode } from './data/logs';

const { copy } = Ember;

export function findLeader(schema) {
  const agent = schema.agents.first();
  return `${agent.address}:${agent.tags.port}`;
}

export default function() {
  const server = this;
  this.timing = 0; // delay for each request, automatically set to 0 during testing

  this.namespace = 'v1';
  this.trackRequests = Ember.testing;

  this.get('/jobs', function({ jobs }, { queryParams }) {
    const json = this.serialize(jobs.all());
    const namespace = queryParams.namespace || 'default';
    return json
      .filter(
        job =>
          namespace === 'default'
            ? !job.NamespaceID || job.NamespaceID === namespace
            : job.NamespaceID === namespace
      )
      .map(job => filterKeys(job, 'TaskGroups', 'NamespaceID'));
  });

  this.get('/job/:id', function({ jobs }, { params, queryParams }) {
    const job = jobs.all().models.find(job => {
      const jobIsDefault = !job.namespaceId || job.namespaceId === 'default';
      const qpIsDefault = !queryParams.namespace || queryParams.namespace === 'default';
      return (
        job.id === params.id &&
        (job.namespaceId === queryParams.namespace || (jobIsDefault && qpIsDefault))
      );
    });

    return job ? this.serialize(job) : new Response(404, {}, null);
  });

  this.get('/job/:id/summary', function({ jobSummaries }, { params }) {
    return this.serialize(jobSummaries.findBy({ jobId: params.id }));
  });

  this.get('/job/:id/allocations', function({ allocations }, { params }) {
    return this.serialize(allocations.where({ jobId: params.id }));
  });

  this.get('/job/:id/versions', function({ jobVersions }, { params }) {
    return this.serialize(jobVersions.where({ jobId: params.id }));
  });

  this.get('/job/:id/deployments', function({ deployments }, { params }) {
    return this.serialize(deployments.where({ jobId: params.id }));
  });

  this.post('/job/:id/periodic/force', function(schema, { params }) {
    // Create the child job
    const parent = schema.jobs.find(params.id);

    // Use the server instead of the schema to leverage the job factory
    server.create('job', 'periodicChild', {
      parentId: parent.id,
      namespaceId: parent.namespaceId,
      namespace: parent.namespace,
      createAllocations: parent.createAllocations,
    });

    // Return bogus, since the response is normally just eval information
    return new Response(200, {}, '{}');
  });

  this.get('/deployment/:id');

  this.get('/job/:id/evaluations', function({ evaluations }, { params }) {
    return this.serialize(evaluations.where({ jobId: params.id }));
  });

  this.get('/evaluation/:id');

  this.get('/deployment/allocations/:id', function(schema, { params }) {
    const job = schema.jobs.find(schema.deployments.find(params.id).jobId);
    const allocations = schema.allocations.where({ jobId: job.id });

    return this.serialize(allocations.slice(0, 3));
  });

  this.get('/nodes', function({ nodes }) {
    const json = this.serialize(nodes.all());
    return json;
  });

  this.get('/node/:id');

  this.get('/node/:id/allocations', function({ allocations }, { params }) {
    return this.serialize(allocations.where({ nodeId: params.id }));
  });

  this.get('/allocation/:id');

  this.get('/namespaces', function({ namespaces }) {
    const records = namespaces.all();

    if (records.length) {
      return this.serialize(records);
    }

    return new Response(501, {}, null);
  });

  this.get('/namespace/:id', function({ namespaces }, { params }) {
    if (namespaces.all().length) {
      return this.serialize(namespaces.find(params.id));
    }

    return new Response(501, {}, null);
  });

  this.get('/agent/members', function({ agents }) {
    return {
      Members: this.serialize(agents.all()),
    };
  });

  this.get('/status/leader', function(schema) {
    return JSON.stringify(findLeader(schema));
  });

  this.get('/acl/token/self', function({ tokens }, req) {
    const secret = req.requestHeaders['X-Nomad-Token'];
    const tokenForSecret = tokens.findBy({ secretId: secret });

    // Return the token if it exists
    if (tokenForSecret) {
      return this.serialize(tokenForSecret);
    }

    // Client error if it doesn't
    return new Response(400, {}, null);
  });

  this.get('/acl/token/:id', function({ tokens }, req) {
    const token = tokens.find(req.params.id);
    const secret = req.requestHeaders['X-Nomad-Token'];
    const tokenForSecret = tokens.findBy({ secretId: secret });

    // Return the token only if the request header matches the token
    // or the token is of type management
    if (token.secretId === secret || (tokenForSecret && tokenForSecret.type === 'management')) {
      return this.serialize(token);
    }

    // Return not authorized otherwise
    return new Response(403, {}, null);
  });

  this.get('/acl/policy/:id', function({ policies, tokens }, req) {
    const policy = policies.find(req.params.id);
    const secret = req.requestHeaders['X-Nomad-Token'];
    const tokenForSecret = tokens.findBy({ secretId: secret });

    // Return the policy only if the token that matches the request header
    // includes the policy or if the token that matches the request header
    // is of type management
    if (
      tokenForSecret &&
      (tokenForSecret.policies.includes(policy) || tokenForSecret.type === 'management')
    ) {
      return this.serialize(policy);
    }

    // Return not authorized otherwise
    return new Response(403, {}, null);
  });

  // TODO: in the future, this hack may be replaceable with dynamic host name
  // support in pretender: https://github.com/pretenderjs/pretender/issues/210
  HOSTS.forEach(host => {
    this.get(`http://${host}/v1/client/allocation/:id/stats`, function(
      { clientAllocationStats },
      { params }
    ) {
      return this.serialize(clientAllocationStats.find(params.id));
    });

    this.get(`http://${host}/v1/client/stats`, function({ clientStats }) {
      return this.serialize(clientStats.find(host));
    });

    this.get(`http://${host}/v1/client/fs/logs/:allocation_id`, function(
      server,
      { params, queryParams }
    ) {
      const allocation = server.allocations.find(params.allocation_id);
      const tasks = allocation.taskStateIds.map(id => server.taskStates.find(id));

      if (!tasks.mapBy('name').includes(queryParams.task)) {
        return new Response(400, {}, 'must include task name');
      }

      if (queryParams.plain) {
        return logFrames.join('');
      }

      return logEncode(logFrames, logFrames.length - 1);
    });
  });
}

function filterKeys(object, ...keys) {
  const clone = copy(object, true);

  keys.forEach(key => {
    delete clone[key];
  });

  return clone;
}