# ╭──────╮
# │ code │
# ╰──────╯

# ╭──────┬───────────╮
# │ code │ variables │
# ╰──────┴───────────╯

# TODO variablize
# path to the entrypoint main file of the project
RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
# user root directory of the project
RWX_SELF_USER="${HOME}/${RWX_SELF_NAME}"

# cache for the parsing awk script
_rwx_code_awk="$(cat "${RWX_ROOT_SYSTEM}/code.awk")"
# cache for code aliases
_rwx_code_aliases=""
# cache for code aliases functions
_rwx_code_aliases_functions=""
# cache for code commands
_rwx_code_commands=""
# cache for code constants
_rwx_code_constants=""
# cache for code functions
_rwx_code_functions=""
# cache for code variables
_rwx_code_variables=""

# ╭──────┬──────╮
# │ code │ help │
# ╰──────┴──────╯

# output help message
rwx_code_help() {
	rwx_log \
		"rwx_… = functions" \
		" a__… = aliases" \
		" u__… = user"
}

# ╭──────┬─────────╮
# │ code │ install │
# ╰──────┴─────────╯

#/ rwx_install
rwx_code_install() {
	local target="${1}"
	local command file name root
	# code
	if [ -n "${target}" ]; then
		root="${target}${RWX_ROOT_SYSTEM}"
		rwx_remove "${root}"
		cp --recursive "${RWX_ROOT_SYSTEM}" "${root}"
	fi
	# commands
	root="${target}/usr/local/bin"
	name="${RWX_SELF_NAME}.sh"
	file="${root}/${name}"
	rwx_remove "${file}"
	rwx_link "${file}" "${RWX_MAIN_PATH}"
	while IFS= read -r command; do
		file="${root}/${command}"
		rwx_remove "${file}"
		rwx_link "${file}" "${name}"
	done <<EOF
${_rwx_code_commands}
EOF
	# sh
	file="${target}/etc/profile.d/${RWX_SELF_NAME}.sh"
	rwx_remove "${file}"
	rwx_file_write "${file}" "\
export ENV=\"${RWX_MAIN_PATH}\"
"
	# bash
	file="${target}/etc/bash.bashrc"
	rwx_remove "${file}"
	rwx_link "${file}" "${RWX_MAIN_PATH}"
}

# ╭──────┬───────╮
# │ code │ parts │
# ╰──────┴───────╯

# show the cached code
#= rc
rwx_code() {
	echo "${_rwx_code}"
}

# show the cached awk script
rwx_code_awk() {
	echo "${_rwx_code_awk}"
}

# show the cached aliases
#= rca
rwx_code_aliases() {
	echo "${_rwx_code_aliases}"
}

# find aliased function
rwx_code_alias_function() {
	local target="${1}"
	local line name
	while IFS= read -r line; do
		name="$(echo "${line}" | awk "{print \$1}")"
		if [ "${name}" = "${target}" ]; then
			echo "${line}" |
				awk "{print \$2}"
		fi
	done <<EOF
${_rwx_code_aliases_functions}
EOF
}

# show the cached aliases and functions
#= rcaf
rwx_code_aliases_functions() {
	echo "${_rwx_code_aliases_functions}"
}

# show the cached commands
rwx_code_commands() {
	echo "${_rwx_code_commands}"
}

# show the cached constants
#= rcc
rwx_code_constants() {
	echo "${_rwx_code_constants}"
}

# show the cached functions
#= rcf
rwx_code_functions() {
	echo "${_rwx_code_functions}"
}

# show the cached variables
#= rcv
rwx_code_variables() {
	echo "${_rwx_code_variables}"
}

# ╭──────┬───────╮
# │ code │ parse │
# ╰──────┴───────╯

# check source code
rwx_code_check() {
	# check format
	rwx_log
	rwx_shfmt "${RWX_ROOT_SYSTEM}"
	# check syntax
	rwx_log
	rwx_shellcheck "${RWX_ROOT_SYSTEM}"
}

# fetch matching doc for given name
#= rcd
rwx_code_doc() {
	local name="${1}"
	[ -n "${name}" ] || return
	rwx_code |
		awk \
			--assign action="doc" \
			--assign target="${name}" \
			"${_rwx_code_awk}"
}

rwx_code_load() {
	# parse aliases
	_rwx_code_aliases="$(rwx_code_parse "aliases")"
	# parse aliases functions
	local line text
	_rwx_code_aliases_functions="$(rwx_code_parse "aliases functions")"
	while IFS= read -r line; do
		text="$(echo "${line}" | sed "s| |() { |")"
		text="${text} \"\${@}\"; }"
		eval "${text}"
	done <<EOF
${_rwx_code_aliases_functions}
EOF
	# parse commands
	_rwx_code_commands="$(rwx_code_parse "commands")"
	# parse constants
	_rwx_code_constants="$(rwx_code_parse "constants")"
	# parse functions
	_rwx_code_functions="$(rwx_code_parse "functions")"
	# parse variables
	_rwx_code_variables="$(rwx_code_parse "variables")"
}

rwx_code_parse() {
	local action="${1}"
	rwx_code |
		awk \
			--assign action="${action}" \
			"${_rwx_code_awk}"
}

# ╭──────┬──────╮
# │ code │ main │
# ╰──────┴──────╯

rwx_code_main() {
	# source user root
	rwx_main_source "${RWX_SELF_USER}"
	# load code cache
	rwx_code_load
	# set command
	local command
	# command name used to run
	# (stripped from hyphen interactive flag)
	command="$(basename "${0}" | sed "s|^-||")"
	case "${command}" in
	"bash" | "dash" | "sh") unset command ;;
	*) ;;
	esac
	# context / command
	if [ -n "${command}" ]; then
		local function
		# find the matching function
		function="$(rwx_code_alias_function "${command}")"
		if [ -n "${function}" ]; then
			"${function}" "${@}"
		fi
	# context / shell
	else
		# run interactive extras
		if rwx_shell_interactive; then
			# help
			rwx_log
			rwx_code_help
		fi
	fi
}