#!/bin/sh
set -eu

repository="yoloyash/overtchat"
cli_version="0.1.6"

say() {
  printf '%s\n' "$*"
}

fail() {
  printf 'OvertChat install failed: %s\n' "$*" >&2
  exit 1
}

[ "$(uname -s)" = "Linux" ] || fail "the managed installer currently supports Linux"

case "$(uname -m)" in
  x86_64|amd64) architecture="amd64" ;;
  aarch64|arm64) architecture="arm64" ;;
  *) fail "unsupported CPU architecture: $(uname -m)" ;;
esac

for command in curl sha256sum awk install mktemp; do
  command -v "$command" >/dev/null 2>&1 || fail "required command not found: $command"
done

asset="overtchat-linux-$architecture"
release_url="https://github.com/$repository/releases/download/cli-v$cli_version"
temporary_directory=$(mktemp -d)
trap 'rm -rf "$temporary_directory"' EXIT HUP INT TERM

say "Downloading OvertChat $cli_version..."
curl --proto '=https' --tlsv1.2 -fsSLo "$temporary_directory/$asset" \
  "$release_url/$asset"
curl --proto '=https' --tlsv1.2 -fsSLo "$temporary_directory/checksums.txt" \
  "$release_url/overtchat-checksums.txt"

expected=$(
  awk -v asset="$asset" '$2 == asset || $2 == "*" asset { print $1; exit }' \
    "$temporary_directory/checksums.txt"
)
[ -n "$expected" ] || fail "the release checksum for $asset is missing"
actual=$(sha256sum "$temporary_directory/$asset" | awk '{ print $1 }')
[ "$actual" = "$expected" ] || fail "the downloaded binary failed checksum verification"

install_directory="${HOME:?}/.local/bin"
install_path="$install_directory/overtchat"
mkdir -p "$install_directory"
install -m 0755 "$temporary_directory/$asset" "$install_path"

say "Installed the overtchat command at $install_path"
case ":$PATH:" in
  *":$install_directory:"*) ;;
  *)
    say "Add $install_directory to PATH to run overtchat from any shell."
    ;;
esac

if ( : </dev/tty >/dev/tty ) 2>/dev/null; then
  exec "$install_path" setup </dev/tty >/dev/tty
fi

say "Run $install_path setup in an interactive terminal to finish."