import createServerResources from "../k8s/server-create.js";
import deleteServerResources from "../k8s/server-delete.js";
import {
  createServerEntry,
  deleteServerEntry,
  getServerEntry,
  modifyServerEntry,
} from "../database/queries/server-queries.js";
import ExpressClientError, { sendError } from "../util/ExpressClientError.js";
import { toggleServer } from "../k8s/k8s-server-control.js";

const dnsRegex = new RegExp(
  `^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])(\.([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9]))*$`,
);

function backupPayloadFilter(req, res) {
  const serverSpec = req.body;
  const { backupHost, backupBucket, backupId, backupKey, backupInterval } =
    serverSpec;
  // TODO: Impliment non creation time backups
  if (
    !!backupHost ||
    !!backupBucket ||
    !!backupId ||
    !!backupKey ||
    !!backupInterval
  ) {
    // If any keys are required, all are required
    if (
      !(
        !!backupHost &&
        !!backupBucket &&
        !!backupId &&
        !!backupKey &&
        !!backupInterval
      )
    )
      return res.status(400).send("All backup keys are required!");
    if (!dnsRegex.test(backupHost))
      return res.status(400).send("Backup Host invalid!");
  }
  return "filtered";
}

function payloadFilter(req, res) {
  const serverSpec = req.body;
  if (!serverSpec) return res.sendStatus(400);
  const { name, host, version, serverType, memory, extraPorts } = serverSpec;
  if (!name) return res.status(400).send("Server name is required!");
  if (!host) return res.status(400).send("Server host is required!");
  if (!dnsRegex.test(host)) return res.status(400).send("Hostname invalid!");
  if (!version) return res.status(400).send("Server version is required!");
  if (!serverType) return res.status(400).send("Server type is required!");
  if (!memory) return res.status(400).send("Memory is required!");
  if (
    !!extraPorts &&
    (!Array.isArray(extraPorts) ||
      extraPorts.find((e) => typeof e !== "string" || e.length > 5))
  )
    return res
      .status(400)
      .send("Extra ports must be a list of strings with length of 5!");
  return "filtered";
}

function checkServerId(serverSpec) {
  if (!serverSpec) throw new ExpressClientError({ c: 400 });
  if (!serverSpec.id)
    throw new ExpressClientError({ c: 400, m: "Server id missing!" });
}

export async function createServer(req, res) {
  if (payloadFilter(req, res) !== "filtered") return;
  if (backupPayloadFilter(req, res) !== "filtered") return;
  const serverSpec = req.body;
  try {
    const serverEntry = await createServerEntry(serverSpec);
    await createServerResources(serverEntry);
    res.sendStatus(200);
  } catch (e) {
    sendError(res)(e);
  }
}

export async function deleteServer(req, res) {
  // Ensure spec is safe
  const serverSpec = req.body;
  try {
    checkServerId(serverSpec);
  } catch (e) {
    return sendError(res)(e);
  }
  const deleteEntry = deleteServerEntry(serverSpec.id);
  const deleteResources = deleteServerResources(serverSpec);
  Promise.all([deleteEntry, deleteResources])
    .then(() => res.sendStatus(200))
    .catch(sendError(res));
}

export async function startServer(req, res) {
  // Ensure spec is safe
  const serverSpec = req.body;
  try {
    checkServerId(serverSpec);
  } catch (e) {
    return sendError(res)(e);
  }
  const { id } = serverSpec;
  toggleServer(id, true)
    .then(() => res.sendStatus(200))
    .catch(sendError(res));
}

export async function stopServer(req, res) {
  // Ensure spec is safe
  const serverSpec = req.body;
  try {
    checkServerId(serverSpec);
  } catch (e) {
    return sendError(res)(e);
  }
  const { id } = serverSpec;
  toggleServer(id, false)
    .then(() => res.sendStatus(200))
    .catch(sendError(res));
}

export async function getServer(req, res) {
  // Ensure spec is safe
  const serverSpec = req.body;
  try {
    checkServerId(serverSpec);
  } catch (e) {
    return sendError(res)(e);
  }
  const { id } = serverSpec;
  getServerEntry(id).then((s) => {
    delete s.backupKey; // Do not let this ever get to an API client
    s.backupBucket = s.backupPath;
    delete s.backupPath;
    delete s.backupId; // Do not let this ever get to an API client
    res.json(s);
  });
}

export async function modifyServer(req, res) {
  if (payloadFilter(req, res) !== "filtered") return;
  const serverSpec = req.body;
  try {
    checkServerId(serverSpec);
    const serverEntry = await modifyServerEntry(serverSpec);
    // await createServerResources(serverEntry);
    res.sendStatus(200);
  } catch (e) {
    sendError(res)(e);
  }
}