#!/bin/sh
# MeowByte Code installer for macOS and Linux.
#
#   curl -fsSL https://ai.meowbyte.net/install.sh | sh
#
# Downloads the standalone `meowbyte` binary for this machine, checks it against the SHA-256
# published in the release manifest, and installs it to ~/.meowbyte/bin (or $MEOWBYTE_INSTALL_DIR).
# Nothing else is required - no Node, no package manager. On Windows, use install.ps1 instead.
set -eu

API="${MEOWBYTE_API_URL:-https://backend.meowbyte.net}"
DIR="${MEOWBYTE_INSTALL_DIR:-$HOME/.meowbyte/bin}"

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

case "$(uname -s)" in
	Linux) os=linux ;;
	Darwin) os=darwin ;;
	*) fail "unsupported system $(uname -s). On Windows, run: irm https://ai.meowbyte.net/install.ps1 | iex" ;;
esac
case "$(uname -m)" in
	x86_64 | amd64) arch=x64 ;;
	arm64 | aarch64) arch=arm64 ;;
	*) fail "unsupported CPU $(uname -m)" ;;
esac
# An x64 shell running under Rosetta on Apple Silicon should still get the native arm64 build.
if [ "$os" = darwin ] && [ "$arch" = x64 ] && [ "$(sysctl -n sysctl.proc_translated 2>/dev/null || echo 0)" = 1 ]; then
	arch=arm64
fi
key="$os-$arch"

download() {
	if command -v curl >/dev/null 2>&1; then
		curl -fsSL "$1" -o "$2"
	elif command -v wget >/dev/null 2>&1; then
		wget -qO "$2" "$1"
	else
		fail "needs curl or wget"
	fi
}

tmp="$(mktemp -d)"
trap 'rm -rf "$tmp"' EXIT

download "$API/cli/releases/latest.json" "$tmp/latest.json" || fail "couldn't reach $API"
# The manifest is tiny and fixed-shape; parse it without requiring jq.
manifest="$(tr -d '\n\r\t' < "$tmp/latest.json")"
version="$(printf '%s' "$manifest" | sed -n 's/^[^{]*{ *"version" *: *"\([^"]*\)".*/\1/p')"
entry="$(printf '%s' "$manifest" | sed -n "s/.*\"$key\" *: *{\([^}]*\)}.*/\1/p")"
path="$(printf '%s' "$entry" | sed -n 's/.*"path" *: *"\([^"]*\)".*/\1/p')"
sha="$(printf '%s' "$entry" | sed -n 's/.*"sha256" *: *"\([^"]*\)".*/\1/p')"
[ -n "$path" ] && [ -n "$sha" ] || fail "no build for $key in the latest release"

printf 'Downloading MeowByte Code %s for %s...\n' "$version" "$key"
download "$API/cli/releases/$path" "$tmp/meowbyte" || fail "download failed"

if command -v sha256sum >/dev/null 2>&1; then
	actual="$(sha256sum "$tmp/meowbyte" | cut -d' ' -f1)"
else
	actual="$(shasum -a 256 "$tmp/meowbyte" | cut -d' ' -f1)"
fi
[ "$actual" = "$sha" ] || fail "the download didn't match its published checksum - not installing it"

mkdir -p "$DIR"
mv "$tmp/meowbyte" "$DIR/meowbyte"
chmod +x "$DIR/meowbyte"
printf 'Installed %s/meowbyte\n' "$DIR"

case ":$PATH:" in
	*":$DIR:"*) ;;
	*)
		line="export PATH=\"$DIR:\$PATH\""
		case "${SHELL:-}" in
			*/zsh) rc="$HOME/.zshrc" ;;
			*/bash) if [ "$os" = darwin ]; then rc="$HOME/.bash_profile"; else rc="$HOME/.bashrc"; fi ;;
			*) rc="$HOME/.profile" ;;
		esac
		if ! grep -qsF "$line" "$rc"; then
			printf '\n# MeowByte Code\n%s\n' "$line" >> "$rc"
			printf 'Added %s to PATH in %s - open a new terminal, or run: %s\n' "$DIR" "$rc" "$line"
		fi
		;;
esac

printf '\nNext: run `meowbyte login`, then `meowbyte` inside a project.\n'