#!/bin/sh

set -e

# Colors
RED='\033[0;31m'; LightBlue='\033[1;34m'; Green='\033[0;32m'

# For developers
AM_BRANCH="main"

if command -v tput >/dev/null 2>&1; then
	TERMINAL_WIDTH=$(($(tput cols)-3))
else
	TERMINAL_WIDTH=${COLUMNS:-80}
fi
DIVIDING_LINE=$(printf '%*s' "$TERMINAL_WIDTH" '' | tr ' ' '-')

_fit() {
	if command -v tput >/dev/null 2>&1; then
		fold -sw "$TERMINAL_WIDTH" | sed 's/^/ /g'
	else
		fold -sw 77 | sed 's/^/ /g'
	fi
}

# Function to check online connections (uses github.com by default, as the database and CLI itself are stored/hosted there)
_online_check_tool() {
	if command -v wget >/dev/null 2>&1; then
		wget -q --tries=10 --timeout=20 --spider https://github.com
	elif command -v curl >/dev/null 2>&1; then
		curl --output /dev/null --silent --head --fail https://github.com 1> /dev/null
	else
		printf "\n %b💀 ERROR! MISSING ESSENTIAL COMMANDS\033[0m: %s\n\n Install the above and try again! \n\n" "${RED}" "curl, wget"
		exit 0
	fi
}

_online_check() {
	if ! _online_check_tool; then
		printf "\n Installer wouldn't work offline\n\n Please check your internet connection and try again\n\n"
		exit 0
	fi
}

_online_check

# Check dependencies for this script
_check_dependency() {
	AMDEPENDENCES="chmod chown grep"
	for dependency in $AMDEPENDENCES; do
		if ! command -v "$dependency" >/dev/null 2>&1; then
			printf "\n %b💀 ERROR! MISSING ESSENTIAL COMMAND \033[0m: %b\n\n Install the above and try again! \n\n" "${RED}" "$dependency"
			exit 1
		fi
	done
}

_check_dependency

_script_downloader() {
	if command -v wget >/dev/null 2>&1; then
		wget -q "$URL" -O "$SCRIPT"
	elif command -v curl >/dev/null 2>&1; then
		curl -Lo "$SCRIPT" "$URL" 2>/dev/null
	fi
}

# INSTALL "AM" SYSTEM-WIDE
_install_am() {
	CACHEDIR="${XDG_CACHE_HOME:-$HOME/.cache}"
	URL="https://raw.githubusercontent.com/ivan-hc/AM/$AM_BRANCH/INSTALL"
	SCRIPT="$CACHEDIR/INSTALL-AM.sh"
	mkdir -p "$CACHEDIR" || true
	rm -f "$CACHEDIR"/INSTALL-AM.sh || true
	_script_downloader && chmod a+x "$CACHEDIR"/INSTALL-AM.sh
	#cp ./INSTALL "$CACHEDIR"/INSTALL-AM.sh && chmod a+x "$CACHEDIR"/INSTALL-AM.sh # for developers
	if command -v sudo >/dev/null 2>&1; then
		SUDOCMD="sudo"
	elif command -v doas >/dev/null 2>&1; then
		SUDOCMD="doas"
	else
		echo "ERROR: No sudo or doas found"
		exit 1
	fi
	$SUDOCMD "$CACHEDIR"/INSTALL-AM.sh && rm -f "$CACHEDIR"/INSTALL-AM.sh
}

# INSTALL "AM" LOCALLY, AS "APPMAN"
_install_appman() {
	ZSHRC="${ZDOTDIR:-$HOME}/.zshrc"
	BINDIR="${XDG_BIN_HOME:-$HOME/.local/bin}"
	mkdir -p "$BINDIR"
	if ! echo "$PATH" | grep "$BINDIR" >/dev/null 2>&1; then 
		echo '--------------------------------------------------------------------------'
		echo " Adding $BINDIR to PATH, you might need to"
		echo " close and reopen the terminal for this to take effect."
		if [ -e ~/.bashrc ] && ! grep 'PATH="$PATH:$BINDIR"' ~/.bashrc >/dev/null 2>&1; then
			printf '\n%s\n' 'BINDIR="${XDG_BIN_HOME:-$HOME/.local/bin}"' >> ~/.bashrc
			printf '\n%s\n' 'if ! echo $PATH | grep "$BINDIR" >/dev/null 2>&1; then' >> ~/.bashrc
			printf '	export PATH="$PATH:$BINDIR"\nfi\n' >> ~/.bashrc
		fi
		if [ -e "$ZSHRC" ] && ! grep 'PATH="$PATH:$BINDIR"' "$ZSHRC" >/dev/null 2>&1; then
			printf '\n%s\n' 'BINDIR="${XDG_BIN_HOME:-$HOME/.local/bin}"' >> "$ZSHRC"
			printf '\n%s\n' 'if ! echo $PATH | grep "$BINDIR" >/dev/null 2>&1; then' >> "$ZSHRC"
			printf '	export PATH="$PATH:$BINDIR"\nfi\n' >> "$ZSHRC"
		fi
	fi
	URL="https://raw.githubusercontent.com/ivan-hc/AM/$AM_BRANCH/APP-MANAGER"
	SCRIPT="$BINDIR/appman"
	echo '--------------------------------------------------------------------------'
	printf " %bInstalling \"AppMan\" in %b\033[0m\n" "${Green}" "$BINDIR"
	_script_downloader && chmod a+x "$BINDIR"/appman
	echo '--------------------------------------------------------------------------'
	printf " %bThe following modules will be installed gradually, as you use AppMan\033[0m\n" "${Green}"
	MODULES=$(sort "$SCRIPT" | tr '"' '\n' | grep "[a-z]\.am$")
	for module_name in $MODULES; do
		echo " ◆ https://raw.githubusercontent.com/ivan-hc/AM/$AM_BRANCH/modules/$module_name"
	done
	echo '--------------------------------------------------------------------------'
	printf " %b\"AppMan\" has been successfully installed! \033[0m\n" "${Green}"
	printf " Please, run \"%bappman -h\033[0m\" to see the list of the options.\n" "${LightBlue}"
	echo '--------------------------------------------------------------------------'
}

# CHOOSE BETWEEN "AM" AND "APPMAN"
echo "$DIVIDING_LINE"
printf "
Choose how to install \"AM\" and its managed applications:

1. System Installation, as \"%bAM\033[0m\"

- Command   : %bam\033[0m
- Path      : symlink /usr/local/bin/am → /opt/am/APP-MANAGER
- Programs  : installed in /opt or locally
- Root      : YES, only for installations and removals
- Ownership : only you have read-write permissions
- Target    : power users
- Others    : can only use programs and AppMan mode

2. Local Installation, as \"%bAppMan\033[0m\"

- Command   : %bappman\033[0m
- Path      : %b/.local/bin/appman
- Programs  : can be installed anywhere
- Root      : NO
- Ownership : anyone with read-write access in %b
- Target    : anyone
- Others    : can have separate configs or replicate yours
\n" "${RED}" "${Green}" "${LightBlue}" "${Green}" "$HOME" "$HOME" | _fit

read -r -p " Choose between \"AM\" (type 1) and \"AppMan\" (2), or leave blank to exit: " response
case "$response" in
	1)	_install_am || exit 1
		;;
	2)	_install_appman || exit 1
		;;
	''|*)
		echo "$DIVIDING_LINE"
		echo "Installation aborted, exiting." && echo "$DIVIDING_LINE" && exit 1
		;;
esac