import fs from "fs";

import FormData from "form-data";
import got, { OptionsOfJSONResponseBody, Response } from "got";
import stream from "stream";
import { promisify } from "util";
import logger from "../config/winston.js";
import messageManager from "../tools/messageManager.js";
import * as settingsTools from "../tools/settingsTools.js";
import * as statusTools from "../tools/status.js";
import { NewPartialBackupPayload } from "../types/services/ha_os_payload.js";
import {
  AddonModel,
  BackupDetailModel,
  BackupModel,
  CoreInfoBody
} from "../types/services/ha_os_response.js";
import { Status } from "../types/status.js";

const pipeline = promisify(stream.pipeline);

const token = process.env.SUPERVISOR_TOKEN;

// Default timeout to 90min
const create_snap_timeout = process.env.CREATE_BACKUP_TIMEOUT
  ? parseInt(process.env.CREATE_BACKUP_TIMEOUT)
  : 90 * 60 * 1000;

function getVersion(): Promise<Response<CoreInfoBody>> {
  return got<CoreInfoBody>("http://hassio/core/info", {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  }).then(
    (result) => {
      return result;
    },
    (error) => {
      messageManager.error(
        "Fail to fetch Home Assistant version",
        error?.message
      );
      logger.error(`Fail to fetch Home Assistant version`);
      logger.error(error);
      return error;
    }
  );
}

function getAddonList(): Promise<Response<{ addons: AddonModel[] }>> {
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  };
  return got<{ addons: AddonModel[] }>("http://hassio/addons", option).then(
    (result) => {
      result.body.addons.sort((a, b) => {
        const textA = a.name.toUpperCase();
        const textB = b.name.toUpperCase();
        return textA < textB ? -1 : textA > textB ? 1 : 0;
      });
      return result;
    },
    (error) => {
      messageManager.error("Fail to fetch addons list", error?.message);
      logger.error(`Fail to fetch addons list (${error?.message})`);
      logger.error(error);
      return error;
    }
  );
}

function getAddonToBackup() {
  const excluded_addon = settingsTools.getSettings().exclude_addon;
  return getAddonList().then((response) => {
    const slugs: string[] = [];
    for (const addon of response.body.addons) {
      if (!excluded_addon.includes(addon.slug)) slugs.push(addon.slug);
    }
    logger.debug("Addon to backup:");
    logger.debug(slugs);
    return slugs;
  });
}

function getFolderList() {
  return [
    {
      name: "Home Assistant configuration",
      slug: "homeassistant",
    },
    {
      name: "SSL",
      slug: "ssl",
    },
    {
      name: "Share",
      slug: "share",
    },
    {
      name: "Media",
      slug: "media",
    },
    {
      name: "Local add-ons",
      slug: "addons/local",
    },
  ];
}

function getFolderToBackup() {
  const excluded_folder = settingsTools.getSettings().exclude_folder;
  const all_folder = getFolderList();
  const slugs = [];
  for (const folder of all_folder) {
    if (!excluded_folder.includes(folder.slug)) slugs.push(folder.slug);
  }
  logger.debug("Folders to backup:");
  logger.debug(slugs);
  return slugs;
}

function getBackups(): Promise<Response<{ backups: BackupModel[] }>> {
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  };
  return got<{ backups: BackupModel[] }>("http://hassio/backups", option).then(
    (result) => {
      return result;
    },
    (error) => {
      messageManager.error("Fail to fetch Hassio backups", error?.message);
      return error;
    }
  );
}

function downloadSnapshot(id: string): Promise<string> {
  logger.info(`Downloading snapshot ${id}...`);
  if (!fs.existsSync("./temp/")) {
    fs.mkdirSync("./temp/");
  }
  const tmp_file = `./temp/${id}.tar`;
  const stream = fs.createWriteStream(tmp_file);
  const status = statusTools.getStatus();
  status.status = "download";
  status.progress = 0;
  statusTools.setStatus(status);
  const option = {
    headers: { Authorization: `Bearer ${token}` },
  };

  return pipeline(
    got.stream
      .get(`http://hassio/backups/${id}/download`, option)
      .on("downloadProgress", (e) => {
        const percent = Math.round(e.percent * 100) / 100;
        if (status.progress !== percent) {
          status.progress = percent;
          statusTools.setStatus(status);
        }
      }),
    stream
  ).then(
    () => {
      logger.info("Download success !");
      status.progress = 1;
      statusTools.setStatus(status);
      logger.debug(
        "Snapshot dl size : " + fs.statSync(tmp_file).size / 1024 / 1024
      );
      return tmp_file;
    },
    (reason) => {
      fs.unlinkSync(tmp_file);
      messageManager.error(
        "Fail to download Home Assistant backup",
        reason.message
      );
      return reason;
    }
  );
}

function delSnap(id: string): Promise<Response<string>> {
  const option = {
    headers: { authorization: `Bearer ${token}` },
  };
  return got.delete(`http://hassio/backups/${id}`, option).then(
    (result) => {
      return result;
    },
    (reason) => {
      messageManager.error(
        "Fail to delete Homme assistant backup detail.",
        reason.message
      );
      logger.error("Fail to retrive Homme assistant backup detail.");
      logger.error(reason);
      return reason;
    }
  );
}

function checkSnap(id: string): Promise<Response<BackupDetailModel>> {
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  };
  return got<BackupDetailModel>(
    `http://hassio/backups/${id}/info`,
    option
  ).then(
    (result) => {
      logger.info("Backup found !");
      logger.debug(`Backup size: ${result.body.size}`);
      return result;
    },
    (reason) => {
      messageManager.error(
        "Fail to retrive Homme assistant backup detail.",
        reason.message
      );
      logger.error("Fail to retrive Homme assistant backup detail");
      logger.error(reason);
      return reason;
    }
  );
}

function createNewBackup(
  name: string,
  addonSlugs: string[],
  folders: string[]
): Promise<Response<{ slug: string }>> {
  const status = statusTools.getStatus();
  status.status = "creating";
  status.progress = -1;
  statusTools.setStatus(status);
  logger.info("Creating new snapshot...");
  const body: NewPartialBackupPayload = {
    name: name,
    addons: addonSlugs,
    folders: folders,
  };

  const password_protected = settingsTools.getSettings().password_protected;
  logger.debug(`Is password protected ? ${password_protected}`);
  if (password_protected === "true") {
    body.password = settingsTools.getSettings().password_protect_value;
  }
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
    timeout: {
      response: create_snap_timeout,
    },
    json: body,
  };
  return got
    .post<{ slug: string }>(`http://hassio/backups/new/partial`, option)
    .then(
      (result) => {
        logger.info(`Snapshot created with id ${result.body.slug}`);
        return result;
      },
      (reason) => {
        messageManager.error("Fail to create new backup.", reason.message);
        logger.error("Fail to create new backup");
        logger.error(reason);
        return reason;
      }
    );
}

function clean(backups: BackupModel[]) {
  const promises = [];
  let limit = settingsTools.getSettings().auto_clean_local_keep;
  if (limit == null) {
    limit = 5;
  }
  if (backups.length < limit) {
    return;
  }
  backups.sort((a, b) => {
    return a.date < b.date ? 1 : -1;
  });
  const toDel = backups.slice(limit);
  for (const i of toDel) {
    promises.push(delSnap(i.slug));
  }
  logger.info("Local clean done.");
  return Promise.allSettled(promises).then((values) => {
    let errors = false;
    for (const val of values) {
      if (val.status == "rejected") {
        messageManager.error("Fail to delete backup", val.reason);
        logger.error("Fail to delete backup");
        logger.error(val.reason);
        errors = true;
      }
    }
    if (errors) {
      messageManager.error("Fail to clean backups in Home Assistant");
      logger.error("Fail to clean backups in Home Assistant");
      return Promise.reject();
    }
  });
}

function uploadSnapshot(path: string) {
  return new Promise((resolve, reject) => {
    const status = statusTools.getStatus();
    status.progress = 0;
    statusTools.setStatus(status);
    logger.info("Uploading backup...");
    const stream = fs.createReadStream(path);
    const form = new FormData();
    form.append("file", stream);

    const options = {
      body: form,
      headers: { authorization: `Bearer ${token}` },
    };
    got.stream
      .post(`http://hassio/backups/new/upload`, options)
      .on("uploadProgress", (e) => {
        const percent = e.percent;
        if (status.progress !== percent) {
          status.progress = percent;
          statusTools.setStatus(status);
        }
        if (percent >= 1) {
          logger.info("Upload done...");
        }
      })
      .on("response", (res) => {
        if (res.statusCode !== 200) {
          logger.error(status.message);
          fs.unlinkSync(path);
          reject(status.message);
        } else {
          logger.info(`...Upload finish ! (status: ${res.statusCode})`);
          fs.unlinkSync(path);
          resolve(res);
        }
      })
      .on("error", (err) => {
        fs.unlinkSync(path);
        messageManager.error(
          "Fail to upload backup to Home Assistant",
          err?.message
        );
        logger.error("Fail to upload backup to Home Assistant");
        logger.error(err);
        reject(err);
      });
  });
}

function stopAddons(addonSlugs: string[]) {
  logger.info("Stopping addons...");
  const promises = [];
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  };
  for (const addon of addonSlugs) {
    if (addon !== "") {
      logger.debug(`... Stopping addon ${addon}`);
      promises.push(got.post(`http://hassio/addons/${addon}/stop`, option));
    }
  }
  return Promise.allSettled(promises).then((values) => {
    let errors = false;
    for (const val of values) {
      if (val.status == "rejected") {
        messageManager.error("Fail to stop addon", val.reason);
        logger.error("Fail to stop addon");
        logger.error(val.reason);
        errors = true;
      }
    }
    if (errors) {
      messageManager.error("Fail to stop addon");
      logger.error("Fail to stop addon");
      return Promise.reject();
    }
  });
}

function startAddons(addonSlugs: string[]) {
  logger.info("Starting addons...");
  const status = statusTools.getStatus();
  status.status = "starting";
  status.progress = -1;
  statusTools.setStatus(status);
  const promises = [];
  const option: OptionsOfJSONResponseBody = {
    headers: { authorization: `Bearer ${token}` },
    responseType: "json",
  };
  for (const addon of addonSlugs) {
    if (addon !== "") {
      logger.debug(`... Starting addon ${addon}`);
      promises.push(got.post(`http://hassio/addons/${addon}/start`, option));
    }
  }
  return Promise.allSettled(promises).then((values) => {
    let errors = false;
    for (const val of values) {
      if (val.status == "rejected") {
        messageManager.error("Fail to start addon", val.reason);
        logger.error("Fail to start addon");
        logger.error(val.reason);
        errors = true;
      }
    }
    if (errors) {
      messageManager.error("Fail to start addon");
      logger.error("Fail to start addon");
      return Promise.reject();
    }
  });
}

function publish_state(state: Status) {
  // let data_error_sensor = {
  //     state: state.status == "error" ? "on" : "off",
  //     attributes: {
  //         friendly_name: "Nexcloud Backup Error",
  //         device_class: "problem",
  //         error_code: state.error_code,
  //         message: state.message,
  //         icon: state.status == "error" ? "mdi:cloud-alert" : "mdi:cloud-check"
  //     },
  // }
  // let option = {
  //     headers: { "authorization": `Bearer ${token}` },
  //     responseType: "json",
  //     json: data_error_sensor
  // };
  // got.post(`http://hassio/core/api/states/binary_sensor.nextcloud_backup_error`, option)
  // .then((result) => {
  //     logger.debug('Home assistant sensor updated (error status)');
  // })
  // .catch((error) => {
  //     logger.error(error);
  // });
  // let icon = ""
  // switch(state.status){
  //     case "error":
  //         icon = "mdi:cloud-alert";
  //         break;
  //     case "download":
  //     case "download-b":
  //         icon = "mdi:cloud-download";
  //         break;
  //     case "upload":
  //     case "upload-b":
  //         icon = "mdi:cloud-upload";
  //         break;
  //     case "idle":
  //         icon = "mdi:cloud-check";
  //         break;
  //     default:
  //         icon = "mdi:cloud-sync";
  //         break;
  // }
  // let data_state_sensor = {
  //     state: state.status,
  //     attributes: {
  //         friendly_name: "Nexcloud Backup Status",
  //         error_code: state.error_code,
  //         message: state.message,
  //         icon: icon,
  //         last_backup: state.last_backup == null || state.last_backup == "" ? "" : new Date(state.last_backup).toISOString(),
  //         next_backup: state.next_backup == null || state.next_backup == "" ? "" : new Date(state.next_backup).toISOString()
  //     },
  // }
  // option.json = data_state_sensor
  // got.post(`http://hassio/core/api/states/sensor.nextcloud_backup_status`, option)
  // .then((result) => {
  //     logger.debug('Home assistant sensor updated (status)');
  // })
  // .catch((error) => {
  //     logger.error(error);
  // });
}

export {
  getVersion,
  getAddonList,
  getFolderList,
  getBackups,
  downloadSnapshot,
  createNewBackup,
  uploadSnapshot,
  stopAddons,
  startAddons,
  clean,
  publish_state,
};