import pg from "../postgres.js";
import {
  deleteQuery,
  insertQuery,
  selectWhereAllQuery,
  updateWhereAllQuery,
} from "../pg-query.js";
import ExpressClientError from "../../util/ExpressClientError.js";
const table = "servers";

const asExpressClientError = (e) => {
  throw new ExpressClientError({ m: e.message, c: 409 });
};

const getMclName = (host, id) =>
  `${host.toLowerCase().replaceAll(".", "-")}-${id}`;

export async function checkAuthorization(serverId, cairoId) {
  const q = selectWhereAllQuery(table, {
    id: serverId,
    owner_cairo_id: cairoId,
  });
  return (await pg.query(q)).length === 1;
}

export async function createServerEntry(cairoId, serverSpec) {
  const {
    name,
    host,
    version,
    serverType: server_type,
    cpu, // TODO: Ignored for now by the K8S manifests
    memory,
    storage: storage_val,
    extraPorts: extra_ports,
    backupHost: backup_host,
    backupBucket: backup_bucket_path,
    backupId: backup_id,
    backupKey: backup_key,
    backupInterval: backup_interval,
  } = serverSpec;

  var q = insertQuery(table, {
    name,
    owner_cairo_id: cairoId,
    host,
    version,
    server_type,
    cpu, // TODO: Ignored for now by the K8S manifests
    memory,
    storage: !storage_val || storage_val === "0" ? null : storage_val, // 0, undefined, null, or "0" becomes null
    extra_ports,
    backup_enabled: !!backup_interval ? true : null, // We already verified the payload, so any backup key will work
    backup_host,
    backup_bucket_path,
    backup_id,
    backup_key,
    backup_interval,
  });
  q += "\n RETURNING *";
  try {
    const entries = await pg.query(q);
    const {
      id,
      owner_cairo_id: ownerCairoId,
      name,
      host,
      version,
      server_type: serverType,
      cpu, // TODO: Ignored for now by the K8S manifests
      memory,
      storage,
      extra_ports: extraPorts,
      backup_enabled: backupEnabled,
      backup_host: backupHost,
      backup_bucket_path: backupPath,
      backup_id: backupId,
      backup_key: backupKey,
      backup_interval: backupInterval,
    } = entries[0];
    const mclName = getMclName(host, id);
    return {
      name,
      mclName,
      id,
      ownerCairoId,
      host,
      version,
      serverType,
      cpu, // TODO: Ignored for now by the K8S manifests
      memory,
      storage,
      extraPorts,
      backupEnabled,
      backupHost,
      backupPath,
      backupId,
      backupKey,
      backupInterval,
    };
  } catch (e) {
    asExpressClientError(e);
  }
}

export async function deleteServerEntry(serverId) {
  if (!serverId) asExpressClientError({ message: "Server ID Required!" });
  const q = deleteQuery(table, { id: serverId });
  return pg.query(q).catch(asExpressClientError);
}

export async function getServerEntry(serverId) {
  if (!serverId) asExpressClientError({ message: "Server ID Required!" });
  const q = selectWhereAllQuery(table, { id: serverId });
  try {
    const serverSpecs = await pg.query(q);
    if (serverSpecs.length === 0) return [];
    if (!serverSpecs.length === 1)
      throw Error("Multiple servers found with the same name!");
    const {
      id,
      owner_cairo_id: ownerCairoId,
      name,
      host,
      version,
      server_type: serverType,
      cpu, // TODO: Ignored for now by the K8S manifests
      memory,
      storage,
      extra_ports: extraPorts,
      backup_enabled: backupEnabled,
      backup_host: backupHost,
      backup_bucket_path: backupPath,
      backup_id: backupId,
      backup_key: backupKey,
      backup_interval: backupInterval,
    } = serverSpecs[0];
    const mclName = getMclName(host, id);
    return {
      name,
      mclName,
      id,
      ownerCairoId,
      host,
      version,
      serverType,
      cpu, // TODO: Ignored for now by the K8S manifests
      memory,
      storage,
      extraPorts,
      backupEnabled,
      backupHost,
      backupPath,
      backupId,
      backupKey,
      backupInterval,
    };
  } catch (e) {
    asExpressClientError(e);
  }
}

export async function modifyServerEntry(serverSpec) {
  const {
    id,
    // ownerCairoId: owner_cairo_id, // DIsabled! If these becomes a reqest, please create a new function!
    name,
    // host, // TODO: Can only be updated if service name is generic and non descriptive
    version,
    serverType: server_type,
    cpu, // TODO: Ignored for now by the K8S manifests
    memory,
    // storage,  // DO NOT INCLUDE THIS KEY, Not all storage providers in kubernetes allow for dynamically resizable PVCs
    extraPorts: extra_ports,
    backupEnabled: backup_enabled,
    backupHost: backup_host,
    backupBucket: backup_bucket_path,
    backupId: backup_id,
    backupKey: backup_key,
    backupInterval: backup_interval,
  } = serverSpec;

  const q =
    updateWhereAllQuery(
      table,
      {
        name,
        // host, // TODO: Can only be updated if service name is generic and non descriptive
        version,
        server_type,
        cpu, // TODO: Ignored for now by the K8S manifests
        memory,
        // storage,  // DO NOT INCLUDE THIS KEY, Not all storage providers in kubernetes allow for dynamically resizable PVCs
        extra_ports,
        backup_enabled,
        backup_host,
        backup_bucket_path,
        backup_id,
        backup_key,
        backup_interval,
      },
      { id },
    ) + ` RETURNING *;`;
  try {
    const entries = await pg.query(q);
    const {
      name,
      host, // Should always read the database value
      server_type: serverType,
      storage,
      extra_ports: extraPorts,
      backup_enabled: backupEnabled,
      backup_host: backupHost,
      backup_bucket_path: backupPath,
      backup_id: backupId,
      backup_key: backupKey,
      backup_interval: backupInterval,
    } = entries[0];

    const mclName = getMclName(host, id);

    return {
      name, // Could change
      mclName, // Shouldn't change
      id, // Won't change
      host, // TODO: Can only be updated if service name is generic and non descriptive, this returns the host from the database
      version,
      serverType,
      cpu, // TODO: Ignored for now by the K8S manifests
      memory,
      storage,
      extraPorts,
      backupEnabled,
      backupHost,
      backupPath,
      backupId,
      backupKey,
      backupInterval,
    };
  } catch (e) {
    asExpressClientError(e);
  }
}

export async function getServerEntries() {
  const q = `SELECT * FROM ${table}`;
  return pg.query(q);
}