#!/usr/bin/env bash
# shellcheck disable=SC2034
# CLI parsing — paru-like short option clusters

# Globals set by parse_args
OP=                 # S Q R G B P D F T U none interactive
OP_REFRESH=0        # y
OP_UPGRADE=0        # u
OP_SEARCH=0         # s (count)
OP_INFO=0           # i
OP_CLEAN=0          # c
OP_AUR_ONLY=0       # a (with S/Q)
OP_PRINT=0          # -p for -G
OP_BUILD_INSTALL=0  # -i for -B
TARGETS=()
PACMAN_EXTRA=()     # leftover short flags for pacman passthrough
DO_PASSTHRU=0

print_help() {
	cat <<'EOF'
Usage:
    miaur
    miaur <operation> [...]
    miaur <search terms>

miaur is a pure-shell AUR helper with paru-like everyday commands.

Pacman operations extended with AUR support:
    miaur {-h --help}
    miaur {-V --version}
    miaur {-Q --query}      [options] [packages]
    miaur {-R --remove}     [options] <packages>
    miaur {-S --sync}       [options] [packages]
    miaur {-U --upgrade}    [options] <files>

Additional operations:
    miaur {-G --getpkgbuild} [packages]
    miaur {-B --build}       [directories]
    miaur self-update        Update miaur from Git

With no arguments, miaur runs 'miaur -Syu'.

Common commands:
    miaur -Syu              Upgrade repository and AUR packages
    miaur -Sua              Upgrade AUR packages only
    miaur -S <package>      Install from a repository or the AUR
    miaur -Ss <query>       Search packages
    miaur -Si <package>     Show package information
    miaur -Qua              List available AUR upgrades
    miaur -G <package>      Download a PKGBUILD
    miaur -Gp <package>     Print a PKGBUILD
    miaur -Bi .             Build and install a local PKGBUILD
    miaur self-update       Update miaur itself

Options:
    -a, --aur               Assume targets are from the AUR
        --repo              Assume targets are from repositories
        --skipreview        Skip PKGBUILD review
        --cleanafter        Remove build sources after installation
        --[no]removemake    Remove make dependencies after installation
        --bottomup          Show AUR results first
        --topdown           Show repository results first (default)
        --clonedir <path>   Set the PKGBUILD clone directory
        --mflags <flags>    Pass additional flags to makepkg
        --sudoloop          Keep sudo credentials alive (default)
        --nosudoloop        Disable the sudo keep-alive loop
        --noconfirm         Bypass any confirmation prompts
        --self-update       Same as: miaur self-update
EOF
}

# Strip miaur-only options so the remainder can be forwarded to pacman.
# Prints one argument per line (safe for mapfile with typical package names).
strip_miaur_opts() {
	local -a raw=("$@")
	local i=0
	while ((i < ${#raw[@]})); do
		local arg=${raw[$i]}
		case "$arg" in
		--aur | --repo | --skipreview | --review | --cleanafter | --nocleanafter | \
			--removemake | --noremovemake | --noremovermake | --bottomup | --topdown | \
			--sudoloop | --nosudoloop | --noconfirm | --self-update) ;;
		--clonedir | --mflags | --mode)
			i=$((i + 1))
			;;
		--clonedir=* | --mflags=* | --mode=* | --repo-url=* | --branch=*) ;;
		--repo-url | --branch)
			i=$((i + 1))
			;;
		*)
			printf '%s\n' "$arg"
			;;
		esac
		i=$((i + 1))
	done
}

parse_args() {
	if [[ $# -eq 0 ]]; then
		OP=S
		OP_REFRESH=1
		OP_UPGRADE=1
		return 0
	fi

	# Subcommand: self-update [--noconfirm] [--repo-url URL] [--branch NAME]
	if [[ $1 == self-update || $1 == --self-update ]]; then
		OP=selfupdate
		local -a raw=("$@")
		local i=1
		while ((i < ${#raw[@]})); do
			local arg=${raw[$i]}
			case "$arg" in
			--noconfirm) MIAUR_NOCONFIRM=1 ;;
			--repo-url)
				i=$((i + 1))
				MIAUR_REPO=${raw[$i]:-}
				[[ -n $MIAUR_REPO ]] || die "--repo-url requires a URL"
				;;
			--repo-url=*) MIAUR_REPO=${arg#*=} ;;
			--branch)
				i=$((i + 1))
				MIAUR_BRANCH=${raw[$i]:-}
				[[ -n $MIAUR_BRANCH ]] || die "--branch requires a name"
				;;
			--branch=*) MIAUR_BRANCH=${arg#*=} ;;
			-h | --help)
				print_help
				exit 0
				;;
			*)
				die "unknown self-update option: $arg"
				;;
			esac
			i=$((i + 1))
		done
		return 0
	fi

	# No leading dash → interactive search
	if [[ $1 != -* ]]; then
		OP=interactive
		TARGETS=("$@")
		return 0
	fi

	local -a raw=("$@")
	local i=0
	while ((i < ${#raw[@]})); do
		local arg=${raw[$i]}
		case "$arg" in
		-h | --help)
			print_help
			exit 0
			;;
		-V | --version)
			printf 'miaur v%s\n' "$MIAUR_VERSION"
			exit 0
			;;
		--self-update)
			OP=selfupdate
			;;
		--aur)
			OP_AUR_ONLY=1
			MIAUR_MODE=aur
			;;
		--repo)
			MIAUR_MODE=repo
			;;
		--skipreview) MIAUR_SKIPREVIEW=1 ;;
		--review) MIAUR_SKIPREVIEW=0 ;;
		--cleanafter) MIAUR_CLEANAFTER=1 ;;
		--nocleanafter) MIAUR_CLEANAFTER=0 ;;
		--removemake) MIAUR_REMOVEMAKE=1 ;;
		--noremovemake) MIAUR_REMOVEMAKE=0 ;;
		# Typo alias kept for compatibility with older docs/scripts
		--noremovermake) MIAUR_REMOVEMAKE=0 ;;
		--bottomup) MIAUR_BOTTOMUP=1 ;;
		--topdown) MIAUR_BOTTOMUP=0 ;;
		--sudoloop) MIAUR_SUDOLOOP=1 ;;
		--nosudoloop) MIAUR_SUDOLOOP=0 ;;
		--noconfirm) MIAUR_NOCONFIRM=1 ;;
		--clonedir)
			i=$((i + 1))
			MIAUR_CLONEDIR=${raw[$i]:-}
			[[ -n $MIAUR_CLONEDIR ]] || die "--clonedir requires a path"
			;;
		--clonedir=*) MIAUR_CLONEDIR=${arg#*=} ;;
		--mflags)
			i=$((i + 1))
			MIAUR_MFLAGS=${raw[$i]:-}
			;;
		--mflags=*) MIAUR_MFLAGS=${arg#*=} ;;
		--mode)
			i=$((i + 1))
			MIAUR_MODE=${raw[$i]:-}
			;;
		--mode=*) MIAUR_MODE=${arg#*=} ;;
		--repo-url)
			i=$((i + 1))
			MIAUR_REPO=${raw[$i]:-}
			[[ -n $MIAUR_REPO ]] || die "--repo-url requires a URL"
			;;
		--repo-url=*) MIAUR_REPO=${arg#*=} ;;
		--branch)
			i=$((i + 1))
			MIAUR_BRANCH=${raw[$i]:-}
			[[ -n $MIAUR_BRANCH ]] || die "--branch requires a name"
			;;
		--branch=*) MIAUR_BRANCH=${arg#*=} ;;
		--sync) OP=S ;;
		--query) OP=Q ;;
		--remove)
			OP=R
			DO_PASSTHRU=1
			;;
		--getpkgbuild) OP=G ;;
		--build) OP=B ;;
		--database)
			OP=D
			DO_PASSTHRU=1
			;;
		--files)
			OP=F
			DO_PASSTHRU=1
			;;
		--deptest)
			OP=T
			DO_PASSTHRU=1
			;;
		--upgrade)
			OP=U
			DO_PASSTHRU=1
			;;
		--)
			i=$((i + 1))
			while ((i < ${#raw[@]})); do
				TARGETS+=("${raw[$i]}")
				i=$((i + 1))
			done
			break
			;;
		--*)
			# Unknown long option: keep for pacman passthrough (e.g. --ignore)
			PACMAN_EXTRA+=("$arg")
			DO_PASSTHRU=1
			;;
		-*)
			local cluster=${arg:1}
			local j c
			for ((j = 0; j < ${#cluster}; j++)); do
				c=${cluster:j:1}
				case "$c" in
				S) OP=S ;;
				Q) OP=Q ;;
				R)
					OP=R
					DO_PASSTHRU=1
					;;
				G) OP=G ;;
				B) OP=B ;;
				D)
					OP=D
					DO_PASSTHRU=1
					;;
				F)
					OP=F
					DO_PASSTHRU=1
					;;
				T)
					OP=T
					DO_PASSTHRU=1
					;;
				U)
					OP=U
					DO_PASSTHRU=1
					;;
				y) OP_REFRESH=1 ;;
				u) OP_UPGRADE=1 ;;
				s) OP_SEARCH=$((OP_SEARCH + 1)) ;;
				i)
					if [[ $OP == B ]]; then
						OP_BUILD_INSTALL=1
					else
						OP_INFO=1
					fi
					;;
				c) OP_CLEAN=1 ;;
				a)
					OP_AUR_ONLY=1
					MIAUR_MODE=aur
					;;
				p)
					if [[ $OP == G ]]; then
						OP_PRINT=1
					else
						PACMAN_EXTRA+=("$c")
					fi
					;;
				h)
					print_help
					exit 0
					;;
				V)
					printf 'miaur v%s\n' "$MIAUR_VERSION"
					exit 0
					;;
				*) PACMAN_EXTRA+=("$c") ;;
				esac
			done
			;;
		*)
			TARGETS+=("$arg")
			;;
		esac
		i=$((i + 1))
	done
}