#!/bin/sh
# Downloads the latest ThruLine release for this machine from GitHub.
# Checks SHA-256 against SHA256SUMS, then installs to ~/.local/bin.
# Same script as the README's install block -- read it first:
# https://github.com/thrulinehq/thruline#install
set -e
install_thruline() (
  set -eu
  case "$(uname -s)-$(uname -m)" in
    Darwin-arm64) target=aarch64-apple-darwin ;;
    Darwin-x86_64) target=x86_64-apple-darwin ;;
    Linux-aarch64|Linux-arm64) target=aarch64-unknown-linux-musl ;;
    Linux-x86_64) target=x86_64-unknown-linux-musl ;;
    *) printf 'No ThruLine archive for this platform.\n' >&2; exit 1 ;;
  esac

  archive="thruline-cli-$target.tar.gz"
  base="https://github.com/thrulinehq/thruline/releases/latest/download"
  work=$(mktemp -d)
  trap 'rm -rf "$work"' 0
  cd "$work"
  curl -fsSLO "$base/$archive"
  curl -fsSLO "$base/SHA256SUMS"

  expected=$(awk -v name="$archive" '$2 == name { print $1 }' SHA256SUMS)
  [ -n "$expected" ] || { printf 'Missing checksum entry.\n' >&2; exit 1; }
  if command -v shasum >/dev/null 2>&1; then
    actual=$(shasum -a 256 "$archive" | awk '{ print $1 }')
  elif command -v sha256sum >/dev/null 2>&1; then
    actual=$(sha256sum "$archive" | awk '{ print $1 }')
  else
    printf 'Install shasum or sha256sum to verify the download.\n' >&2
    exit 1
  fi
  [ "$expected" = "$actual" ] || { printf 'Checksum mismatch.\n' >&2; exit 1; }

  tar -xzf "$archive"
  mkdir -p "$HOME/.local/bin"
  install -m 0755 "thruline-cli-$target/thruline" "$HOME/.local/bin/thruline"
)
install_thruline

printf '\nThruLine is installed at %s/.local/bin/thruline\n' "$HOME"

# Put ~/.local/bin on PATH for new shells, once: macOS does not have it there by default.
# Set THRULINE_NO_MODIFY_PATH=1 to leave every startup file alone.
mark='# added by the ThruLine installer'
case ":$PATH:" in
  *":$HOME/.local/bin:"*) ;;
  *)
    if [ "${THRULINE_NO_MODIFY_PATH:-}" = 1 ]; then
      printf 'Left your PATH alone (THRULINE_NO_MODIFY_PATH=1).\n'
    else
      line='export PATH="$HOME/.local/bin:$PATH"'
      case "${SHELL:-}" in
        */zsh) rc="$HOME/.zshrc"; shown='~/.zshrc' ;;
        */bash)
          if [ "$(uname -s)" = Darwin ]; then rc="$HOME/.bash_profile"; shown='~/.bash_profile'
          else rc="$HOME/.bashrc"; shown='~/.bashrc'; fi ;;
        */fish)
          rc="$HOME/.config/fish/conf.d/thruline.fish"; shown='~/.config/fish/conf.d/thruline.fish'
          line='fish_add_path "$HOME/.local/bin"' ;;
        *) rc='' ;;
      esac
      if [ -z "$rc" ]; then
        printf 'To type just `thruline`, add ~/.local/bin to your PATH.\n'
      elif [ -f "$rc" ] && grep -qF "$mark" "$rc"; then
        printf '%s already puts ~/.local/bin on your PATH.\n' "$shown"
      else
        mkdir -p "$(dirname "$rc")"
        printf '\n%s %s\n' "$line" "$mark" >> "$rc"
        printf 'Added ~/.local/bin to your PATH in %s, for new Terminal windows.\n' "$shown"
        printf 'To undo it, delete the line ending "%s" from %s.\n' "$mark" "$shown"
      fi
    fi
    ;;
esac

# This window cannot see the new PATH yet; the full path works right away.
printf 'Open HQ now: ~/.local/bin/thruline ui\n'