#!/bin/bash
# Build a single-file version of the wizard for `curl | bash` use:
#   .github/tools/bundle.sh [output]      (default: dist/steamify.sh)
#
# Inlines lib/*.sh in the order steamify.sh sources them and
# wraps the entry point's body in main(), so bash has read the whole file
# before anything runs. That lets the bundle reattach stdin to the terminal
# when it was piped in by curl, so the interactive menu still works.
set -euo pipefail
cd "$(dirname "$0")/../.."

out="${1:-dist/steamify.sh}"
entry=steamify.sh
mkdir -p "$(dirname "$out")"

# Library order, taken from the entry point's source loop.
libs=$(grep -oP '^for lib in \K.*(?=; do$)' "$entry")
[[ -n "$libs" ]] || { echo "bundle: can't find the lib source loop in $entry" >&2; exit 1; }

version="v$(grep -oP '^VERSION=\K.*' "$entry"), $(git describe --always --dirty 2>/dev/null || echo unknown)"

{
    # Header comment and `set` line of the entry point, up to the source loop.
    sed -n '1,/^SCRIPT_DIR=/p' "$entry" | sed '$d'
    echo "# Single-file build ($version), generated by .github/tools/bundle.sh - edit the"
    echo "# sources in the repository instead: https://github.com/theupriser/steamify-cachyos"
    echo
    for lib in $libs; do
        echo "# ----- lib/$lib.sh -----"
        # Drop each module's shebang and its "Sourced by ..." boilerplate.
        sed -e '1{/^#!/d}' -e '/^# Sourced by steamify.sh/d' "lib/$lib.sh"
        echo
    done
    # patches/ and services/ embedded: replace lib/common.sh's patch_file
    # and service_raw, which read them from the checkout.
    embed() {
        local fn="$1" dir="$2" f
        echo "# ----- $dir/ -----"
        echo "$fn() {"
        echo '    case "$1" in'
        for f in "$dir"/*; do
            [[ "$f" == "$dir/README.md" ]] && continue
            grep -q '^STEAMIFY_PATCH_EOF$' "$f" && { echo "bundle: $f contains the heredoc delimiter" >&2; exit 1; }
            echo "        $(basename "$f")) cat << 'STEAMIFY_PATCH_EOF'"
            cat "$f"
            echo "STEAMIFY_PATCH_EOF"
            echo "            ;;"
        done
        echo '        *) return 1 ;;'
        echo '    esac'
        echo "}"
        echo
    }
    embed patch_file patches
    embed service_raw services
    echo "# ----- steamify.sh -----"
    echo "main() {"
    # Everything after the source loop is the entry point's body.
    sed -n '/^for lib in /,$p' "$entry" | sed '1,/^done$/d' | sed 's/^/    /; s/^    $//'
    echo "}"
    echo
    echo "# Piped in via curl, bash reads this very file from stdin. Give the menu"
    echo "# the terminal instead - on the same line as main and exit: bash has read"
    echo "# this line in full, so it never reads further script from the terminal."
    echo 'reattach_tty() { if [[ ! -t 0 && -z "${WIZARD_KEEP_STDIN:-}" ]]; then { exec </dev/tty; } 2>/dev/null || true; fi; }'
    echo 'reattach_tty; main "$@"; exit $?'
} > "$out"

chmod +x "$out"
bash -n "$out"
echo "Wrote $out ($version)"