#!/usr/bin/env bash
# PKGBUILD review

# Show a file with bat/less/cat
_review_show_file() {
	local file=$1
	[[ -f $file ]] || return 0
	msg2 "File: ${file#"$2"/}"
	if command -v "${MIAUR_BAT}" >/dev/null 2>&1; then
		"${MIAUR_BAT}" --style=plain --paging=always --language=bash "$file" || true
	elif command -v less >/dev/null 2>&1; then
		less -R "$file" || true
	else
		cat "$file"
	fi
}

# List reviewable files in a package directory (relative paths)
_review_list_files() {
	local dir=$1
	(
		cd "$dir" || exit 1
		# PKGBUILD first, then install scripts and other shell helpers
		[[ -f PKGBUILD ]] && printf '%s\n' PKGBUILD
		find . -maxdepth 1 -type f \( \
			-name '*.install' -o \
			-name '*.sh' -o \
			-name 'apply-patches' -o \
			-name '*.hook' \
		\) ! -name 'PKGBUILD' -printf '%P\n' 2>/dev/null | sort
	)
}

# Review PKGBUILD in dir. Returns 0 to continue, 1 to abort, 2 to skip.
review_pkgbuild() {
	local dir=$1
	local name=${2:-$(basename "$dir")}

	[[ ${MIAUR_SKIPREVIEW:-0} -eq 1 ]] && return 0

	local pb="$dir/PKGBUILD"
	[[ -f $pb ]] || die "PKGBUILD not found: $dir"

	msg "Reviewing $name"
	local -a files=()
	mapfile -t files < <(_review_list_files "$dir")
	if [[ ${#files[@]} -gt 1 ]]; then
		msg2 "Files: ${files[*]}"
	fi

	_review_show_file "$pb" "$dir"

	while true; do
		printf '%s::%s View diff (d), files (f), edit (e), continue (y), skip (s), or quit (q)? [Y/d/f/e/s/q] ' \
			"${C_BOLD}${C_BLUE}" "${C_RESET}"
		local ans=
		read -r ans || return 1
		ans=${ans:-y}
		case "${ans,,}" in
		y | yes | '') return 0 ;;
		q | quit | n | no)
			warn "Cancelled by user"
			return 1
			;;
		s | skip) return 2 ;;
		e | edit)
			"${MIAUR_EDITOR}" "$pb"
			;;
		f | files)
			local -a again=()
			mapfile -t again < <(_review_list_files "$dir")
			local i
			for i in "${!again[@]}"; do
				printf '  %s%2d%s %s\n' "${C_DIM}" "$((i + 1))" "${C_RESET}" "${again[$i]}"
			done
			printf '%s::%s Open file number (empty to return): ' \
				"${C_BOLD}${C_BLUE}" "${C_RESET}"
			local pick=
			read -r pick || true
			if [[ $pick =~ ^[0-9]+$ ]]; then
				local idx=$((pick - 1))
				if ((idx >= 0 && idx < ${#again[@]})); then
					_review_show_file "$dir/${again[$idx]}" "$dir"
				else
					warn "Invalid number: $pick"
				fi
			fi
			;;
		d | diff)
			if [[ -d $dir/.git ]]; then
				(
					cd "$dir" || exit 0
					# Prefer unstaged/staged local edits; fall back to last fetch range
					if ! ${MIAUR_GIT} diff --stat --quiet HEAD 2>/dev/null; then
						${MIAUR_GIT} --no-pager diff -- HEAD
					elif ${MIAUR_GIT} rev-parse --verify 'HEAD@{1}' >/dev/null 2>&1; then
						${MIAUR_GIT} --no-pager diff -- 'HEAD@{1}'..HEAD
					else
						warn "No prior revision available for comparison"
						${MIAUR_GIT} --no-pager diff -- PKGBUILD || true
					fi
				) || true
			else
				warn "No Git history is available for comparison"
			fi
			;;
		*)
			warn "Invalid input"
			;;
		esac
	done
}