#!/usr/bin/env -S deno run --allow-read --allow-write --allow-env --allow-net --allow-run --allow-sys --quiet

// Copyright 2021 Deno Land Inc. All rights reserved. MIT license.

import {
  greaterOrEqual as semverGreaterThanOrEquals,
  parse as semverParse,
} from "@std/semver";
import { setColorEnabled } from "@std/fmt/colors";
import { type Args, parseArgs } from "./src/args.ts";
import { error } from "./src/error.ts";
import deploySubcommand from "./src/subcommands/deploy.ts";
import upgradeSubcommand from "./src/subcommands/upgrade.ts";
import logsSubcommand from "./src/subcommands/logs.ts";
import topSubcommand from "./src/subcommands/top.ts";
import projectsSubcommand from "./src/subcommands/projects.ts";
import deploymentsSubcommand from "./src/subcommands/deployments.ts";
import apiSubcommand from "./src/subcommands/api.ts";
import { MINIMUM_DENO_VERSION, VERSION } from "./src/version.ts";
import { fetchReleases, getConfigPaths } from "./src/utils/info.ts";
import configFile from "./src/config_file.ts";
import inferConfig from "./src/config_inference.ts";
import { wait } from "./src/utils/spinner.ts";

const help = `deployctl ${VERSION}
Command line tool for Deno Deploy.

SUBCOMMANDS:
    deploy      Deploy a script with static files to Deno Deploy
    projects    Manage projects
    deployments Manage deployments
    logs        View logs for the given project
    top         Monitor projects resource usage in real time
    upgrade     Upgrade deployctl to the given version (defaults to latest)
    api         Perform raw HTTP requests against the Deploy API 

For more detailed help on each subcommand, use:

    deployctl <SUBCOMMAND> -h
`;

if (
  !semverGreaterThanOrEquals(
    semverParse(Deno.version.deno),
    semverParse(MINIMUM_DENO_VERSION),
  )
) {
  error(
    `The Deno version you are using is too old. Please update to Deno ${MINIMUM_DENO_VERSION} or later. To do this run \`deno upgrade\`.`,
  );
}

const args = parseArgs(Deno.args);

setColoring(args);

if (Deno.stdin.isTerminal()) {
  let latestVersion;
  // Get the path to the update information json file.
  const { updatePath } = getConfigPaths();
  // Try to read the json file.
  const updateInfoJson = await Deno.readTextFile(updatePath).catch((error) => {
    if (error.name == "NotFound") return null;
    console.error(error);
  });
  if (updateInfoJson) {
    const updateInfo = JSON.parse(updateInfoJson) as {
      lastFetched: number;
      latest: number;
    };
    const moreThanADay =
      Math.abs(Date.now() - updateInfo.lastFetched) > 24 * 60 * 60 * 1000;
    // Fetch the latest release if it has been more than a day since the last
    // time the information about new version is fetched.
    if (moreThanADay) {
      fetchReleases();
    } else {
      latestVersion = updateInfo.latest;
    }
  } else {
    fetchReleases();
  }

  // If latestVersion is set we need to inform the user about a new release.
  if (
    latestVersion &&
    !(semverGreaterThanOrEquals(
      semverParse(VERSION),
      semverParse(latestVersion.toString()),
    ))
  ) {
    console.error(
      [
        `A new release of deployctl is available: ${VERSION} -> ${latestVersion}`,
        "To upgrade, run `deployctl upgrade`",
        `https://github.com/denoland/deployctl/releases/tag/${latestVersion}\n`,
      ].join("\n"),
    );
  }
}

const subcommand = args._.shift();
switch (subcommand) {
  case "deploy":
    await setDefaultsFromConfigFile(args);
    await inferConfig(args);
    await deploySubcommand(args);
    break;
  case "upgrade":
    await setDefaultsFromConfigFile(args);
    await upgradeSubcommand(args);
    break;
  case "logs":
    await setDefaultsFromConfigFile(args);
    await logsSubcommand(args);
    break;
  case "top":
    await setDefaultsFromConfigFile(args);
    await topSubcommand(args);
    break;
  case "projects":
    await setDefaultsFromConfigFile(args);
    await projectsSubcommand(args);
    break;
  case "deployments":
    await setDefaultsFromConfigFile(args);
    await deploymentsSubcommand(args);
    break;
  case "api":
    await apiSubcommand(args);
    break;
  default:
    if (args.version) {
      console.log(`deployctl ${VERSION}`);
      Deno.exit(0);
    }
    if (args.help) {
      console.log(help);
      Deno.exit(0);
    }
    console.error(help);
    Deno.exit(1);
}

async function setDefaultsFromConfigFile(args: Args) {
  const loadFileConfig = !args.version && !args.help;
  if (loadFileConfig) {
    const config = await configFile.read(
      args.config ?? configFile.cwdOrAncestors(),
    );
    if (config === null && args.config !== undefined && !args["save-config"]) {
      error(
        `Could not find or read the config file '${args.config}'. Use --save-config to create it.`,
      );
    }
    if (config !== null) {
      wait("").start().info(`Using config file '${config.path()}'`);
      config.useAsDefaultFor(args);
      // Set the effective config path for the rest of the execution
      args.config = config.path();
    }
  }
}

function setColoring(args: Args) {
  switch (args.color) {
    case "auto":
      setAutoColoring();
      break;
    case "always":
      setColorEnabled(true);
      break;
    case "never":
      setColorEnabled(false);
      break;
    default:
      wait("").start().warn(
        `'${args.color}' value for the --color option is not valid. Valid values are 'auto', 'always' and 'never'. Defaulting to 'auto'`,
      );
      setAutoColoring();
  }
}

function setAutoColoring() {
  if (Deno.stdout.isTerminal()) {
    setColorEnabled(true);
  } else {
    setColorEnabled(false);
  }
}
