install.ab

import { has_failed, input_prompt } from "std/env"
import { split_chars } from "std/text"
import { array_contains } from "std/array"
import { file_exists } from "std/fs"
import { get_os, get_arch, get_place, get_bins_folder } from "./shared.ab"

let name = "amber"
let target = "amber"
let archive = "amber.tar.xz"
let agent = has_failed("uname -a")
    then "unknown"
    else trust $ uname -a $

echo ""

fun get_latest_release_tag() {
    let tag_url = "https://api.github.com/repos/amber-lang/{name}/releases/latest"
    let tag_json = $ curl -sL "{tag_url}" $?
    // Get the tag name from the JSON
    let tag = $ echo "\${nameof tag_json}" \
        | grep -Eo "tag_name\\"[^\\"]*\\"([^\\"]+)\\"" \
        | grep -Eo "\\"[^\\"]+\\"\$" \
        | grep -Eo "[^\\"\\s]+" $?
    return tag
}

main(args) {
    let os = get_os()
    let arch = get_arch()

    let user_only_install = array_contains(args, "--user")
    let place = get_place(user_only_install)
    let bins_folder = get_bins_folder(user_only_install)

    // Check if such directory exists
    trust $ test -d "{place}" $

    if status == 0 {
        echo "Amber already installed"
        echo "It seems that Amber is already installed on your system. ({place})"
        echo "If you want to reinstall Amber, uninstall it first."
        echo "(Find out more at https://docs.amber-lang.com/getting_started/installation#uninstallation)"
        exit 2
    }

    // Check if curl is installed
    if has_failed("curl -V") {
        echo "Curl is not installed on your system."
        echo "Please install `curl` and try again."
        exit 1
    }

    echo "Installing Amber... 🚀"

    // Make the directories we need first to ensure we have permissions before downloading any files
    // this decreases the chance that our script results in partial installation leaving assets behind
    let sudo = user_only_install then "" else "sudo"
    // Create directory for amber
    silent $ {sudo} mkdir -p "{place}" $ failed {
        echo "Failed to create directory for amber."
        if user_only_install {
            echo "Please make sure that root user can access {place} directory."
        } else {
            echo "Please make sure that your user can access {place} directory."
        }
        exit 1
    }
    if user_only_install {
        silent $ mkdir -p "{bins_folder}" $ failed {
            echo "Failed to create directory for amber bin at {bins_folder}."
            exit 1
        }
    }

    let tag = get_latest_release_tag() failed {
        echo "Failed to get the latest release tag."
        echo "Please try again or use another download method."
        exit 1
    }

    // Set the download link
    let url = "https://github.com/amber-lang/{name}/releases/download/{tag}/amber-{arch}-{os}.tar.xz"

    // Download amber
    silent $ curl -L -o "{archive}" "{url}" $ failed {
        echo "Curl failed to download amber."
        echo "Something went wrong. Please try again later."
        exit 1
    }

    // Move archived version of amber
    $ {sudo} mv "{archive}" "{place}/{archive}" $ failed {
        echo "Failed to move amber to the installation directory."
        echo "Please make sure that root user can access {place} directory."
        exit 1
    }

    // Unarchive amber
    silent $ {sudo} tar --strip-components=1 -xvf {place}/{archive} -C {place} $ failed {
        echo "Failed to unarchive amber at {place}/{archive}"
        echo "Please make sure that you have `tar` command installed."
        exit 1
    }

    // Delete the archive
    $ {sudo} rm {place}/{archive} $ failed {
        echo "Failed to remove downloaded archive at {place}/{archive}"
        exit 1
    }

    // Give permissions to execute amber
    $ {sudo} chmod +x "{place}/{target}" $ failed {
        echo "Failed to give permissions to execute amber."
        echo "Please make sure that root user can access {place} directory."
        exit 1
    }

    // Delete the previous symbolic link
    if file_exists("{bins_folder}/{target}") {
        $ {sudo} rm "{bins_folder}/{target}" $ failed {
            echo "Failed to remove the previous amber symbol link."
            echo "Please make sure that root user can access {bins_folder} directory."
            exit 1
        }
    }

    // Create amber symbol link
    $ {sudo} ln -s "{place}/{target}" "{bins_folder}/{target}" $ failed {
        echo "Failed to create amber symbol link."
        echo "Please make sure that root user can access {bins_folder} directory."
        exit 1
    }

    let nickname = input_prompt("Would you like to help improve Amber by sharing your OS info with our developer database? Enter your GitHub nickname (or any nickname) or type `no`:")
    if (nickname != "no") {
        // Send feedback to the server
        trust silent $ curl -G --data-urlencode "agent={agent}" --data-urlencode "nickname={nickname}" --data-urlencode "name=download" "https://amber-lang.com/api/visit" $
    }

    // Send success message
    echo "Amber has been installed successfully. 🎉"
    echo "> Now you can use amber by typing `amber` in your terminal."
    if user_only_install {
        echo "> Since you requested a user only install with `--user` ensure that ~/.local/bin is in your \\$PATH."
    }
}