/* eslint-disable unicorn/no-process-exit */
import { buildProduction } from "@factor/build/webpack-config"

import { generateLoaders } from "@factor/cli/extension-loader"
import * as tools from "@factor/api"
import commander from "commander"
import log from "@factor/api/logger"
import { emitEvent } from "@factor/api/events"
import execa from "execa"
import { createServer } from "@factor/server"
import { showInstallRoutine } from "@factor/loader"
import { getRemoteConfig } from "@factor/api/remote"
import { serverInfo, getCliExecutor } from "./util"
import { factorize, setEnvironment } from "./factorize"
import { CommandOptions } from "./types"
import pkg from "./package.json"
import LoadingBar from "./loading"
import { logSetupNeeded } from "./setup"
interface CommanderArguments {
  options: object[]
  parent: Record<string, any>
  [key: string]: any
}

/**
 * Opens the node inspector port
 * https://nodejs.org/api/inspector.html
 */
const initializeNodeInspector = async (): Promise<void> => {
  const inspector = require("inspector")
  inspector.close()
  await inspector.open()
}

/**
 * Serve Factor
 * @param setup - server options
 */
export const runServer = async (setup: CommandOptions): Promise<void> => {
  await tools.runCallbacks("create-server", setup)
}

/**
 * Runs a command entered in the CLI
 * @param options - command options
 */
export const runCommand = async (options: CommandOptions): Promise<void> => {
  const setup = {
    install: true,
    clean: true,
    NODE_ENV: options.command == "dev" ? "development" : "production",
    ...options,
  }

  const {
    install,
    filter,
    command,
    inspect,
    PORT,
    NODE_ENV,
    skipVerifyDeps,
    debug,
  } = setup

  /**
   * Set environment again based on any changes made via CLI arguments
   */
  setEnvironment({ NODE_ENV, PORT, debug, command })

  /**
   * Gets remote configuration info
   */
  getRemoteConfig()

  try {
    await createServer({ port: PORT, openOnReady: true })
  } catch (error) {
    log.error(error)
    process.exit(1)
  }

  /**
   * Show installation and setup routine
   */
  if (command == "dev") {
    await showInstallRoutine()
  }

  /**
   * Open node inspector port if 'inspect' flag is set
   */
  if (command && inspect) {
    await initializeNodeInspector()
  }

  try {
    const bar = new LoadingBar()

    await bar.update({ percent: 12, msg: "setting up" })

    /**
     * Make sure all package dependencies are installed and updated
     */
    if (install && !skipVerifyDeps) {
      await bar.update({
        percent: 25,
        msg: `checking dependencies with ${getCliExecutor()}`,
      })

      const verifyDepProcess = execa(getCliExecutor(), ["install"])
      await verifyDepProcess

      await bar.update({ percent: 55, msg: "generating files" })
      try {
        generateLoaders(setup)
      } catch (error) {
        bar.stop()
        log.error(error)
      }
    }

    /**
     * Extend and setup Node server environment
     */

    await bar.update({ percent: 80, msg: "adding server extensions" })

    await factorize(setup)

    await bar.update({ percent: 99, msg: "loaded" })

    bar.stop()
  } catch (error) {
    emitEvent("buildError", error)

    throw error
  }

  await tools.runCallbacks(`environment-created`, setup)

  /**
   * Log initial server info
   */
  await serverInfo({ NODE_ENV, command })

  logSetupNeeded(command)

  try {
    if (command && ["build", "start"].includes(command)) {
      await buildProduction(setup)
    } else if (command == "setup") {
      await tools.runCallbacks(`cli-setup`, setup)
    } else if (command == "run") {
      if (!filter) throw new Error("Filter argument is required.")

      await tools.runCallbacks(`cli-run-${filter}`, setup)

      log.success(`Successfully ran "${filter}"\n\n`)
    }

    if (command && ["start", "dev", "serve"].includes(command)) {
      await runServer(setup) // Long running process
    } else {
      if (command) log.success(`Successfully ran [${command}]`)
      // eslint-disable-next-line unicorn/no-process-exit
      process.exit(0)
    }
  } catch (error) {
    log.error(error)
  }

  return
}

/**
 * Clean up commanders provided arguments to just return needed CLI arguments
 * @library commander
 * @param commanderArguments - arguments provided by commander lib
 */
const cleanArguments = (commanderArguments: CommanderArguments): Record<string, any> => {
  const out: { [index: string]: any } = {}

  const { parent = {}, program = {}, ...rest } = commanderArguments

  const flat = { ...program, ...parent, ...rest }

  // Remove all keys starting with Capital letters or underscore
  Object.keys(flat).forEach((k) => {
    if (!k.startsWith("_")) {
      out[k] = flat[k]
    }
  })

  return out
}

/**
 * Handle the CLI using Commander
 * Set up initial Node environment
 */
export const execute = (): void => {
  process.noDeprecation = true
  process.maxOldSpaceSize = 8192

  setEnvironment()

  // options added by filters, plugins or if not wanted in '--help'
  commander.allowUnknownOption(true)
  commander.noHelp = true

  commander
    .version(pkg.version)
    .description("CLI for managing Factor data, builds and deployments")
    .option("--PORT <PORT>", "set server port. default: 3000")
    .option("--ENV <ENV>", "set FACTOR_ENV. default: NODE_ENV")
    .option("--restart", "restart server process flag")
    .option("--debug", "log debugging info")
    .option("--offline", "run in offline mode")
    .option("--inspect", "run node debug-mode inspector")

  commander
    .command("test")
    .description("Used for testing")
    .action(() => {})

  commander
    .command("dev")
    .description("Start development server")
    .option("--static-files", "use static file system for builds instead of memory")
    .option(
      "--watch-server",
      "server development mode - restart the server on file changes"
    )
    .option("--skip-verify-deps", "Skip dependency check")
    .action((_arguments) => {
      runCommand({
        command: "dev",
        ...cleanArguments(_arguments),
        NODE_ENV: "development",
      })
    })

  commander
    .command("start")
    .description("Build and then serve production app.")
    .action((_arguments) =>
      runCommand({ command: "start", ...cleanArguments(_arguments) })
    )

  commander
    .command("serve [NODE_ENV]")
    .description("Serve app in selected environment.")
    .action((NODE_ENV, _arguments) =>
      runCommand({
        command: "serve",
        ...cleanArguments(_arguments),
        install: false,
        NODE_ENV,
      })
    )

  commander
    .command("build")
    .option("--analyze", "Analyze package size")
    .option("--speed", "Output build speed data")
    .description("Build production app")
    .action((_arguments) =>
      runCommand({ command: "build", ...cleanArguments(_arguments) })
    )

  commander
    .command("setup [filter]")
    .description("Setup and verify your Factor app")
    .action((filter, _arguments) =>
      runCommand({
        command: "setup",
        filter,
        clean: false,
        ...cleanArguments(_arguments),
      })
    )

  commander
    .command("run <filter>")
    .description("Run CLI utilities based on filter name (see documentation)")
    .action((filter, _arguments) =>
      runCommand({
        command: "run",
        filter,
        install: false,
        ...cleanArguments(_arguments),
      })
    )

  commander
    .command("create-loaders")
    .option("--clean", "clean generated directories before creation")
    .description("Generate extension loaders")
    .action((_arguments) => generateLoaders(cleanArguments(_arguments)))

  try {
    commander.parse(process.argv)
  } catch (error) {
    throw new Error(error)
  }
}