# shellcheck shell=bash

# ----------------------------
# functions and shell-agnostic
# ----------------------------

function add_to_path() {
	# NOTE: zsh only

	# usage:
	# add_to_path prepend /path/to/prepend
	# add_to_path append /path/to/append

	if [ -d "$2" ]; then
		# If the given path exist, proceed...
		if [[ ":$PATH:" == *":$2:"* ]]; then
			remove_from_path "$2"
		fi

		if [ "$1" = "prepend" ]; then
			PATH="$2:$PATH"
			export PATH
		elif [ "$1" = "append" ]; then
			PATH="$PATH:$2"
			export PATH
		else
			echo "Unknown option. Use 'prepend' or 'append'."
		fi
	fi
}

function remove_from_path() {
	# NOTE: zsh only

	# usage:
	# remove_from_path /path/to/remove

	local path_to_remove="$1"
	if [[ -n "$path_to_remove" && ":$PATH:" == *":$path_to_remove:"* ]]; then
		while [[ ":$PATH:" == *":$path_to_remove:"* ]]; do
			# Remove
			PATH="${PATH/#$path_to_remove:/}"   # If it's at the beginning
			PATH="${PATH/%:$path_to_remove/}"   # If it's at the end
			PATH="${PATH//:$path_to_remove:/:}" # If it's in the middle
		done
		PATH="${PATH#:}" # Remove leading colon
		PATH="${PATH%:}" # Remove trailing colon
		export PATH
	fi
}

# ----------------------------
# globals
# ----------------------------

if [ -n "${ZSH_VERSION}" ]; then
	shell="zsh"
	export DOTFILES_DEBUG_SHELL_ZSH="true"
elif [ -n "${BASH_VERSION}" ]; then
	shell="bash"
	export DOTFILES_DEBUG_SHELL_BASH="true"
else
	shell=""
fi

# ----------------------------
# exports
# ----------------------------

# NOTE: brew shellenv exports several environment variables and extends $PATH
if [ -f /opt/homebrew/bin/brew ]; then
	eval "$(/opt/homebrew/bin/brew shellenv)"
	brew_prefix="$(brew --prefix)"
elif [ -f /home/linuxbrew/.linuxbrew/bin/brew ]; then
	eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
	brew_prefix="$(brew --prefix)"
else
	brew_prefix=""
fi

export DOTFILES="$HOME/.dotfiles"
export DOTFILES_SHELL=$shell
export DOTFILES_BREW_PREFIX=$brew_prefix
export HOMEBREW_NO_ANALYTICS=1
export PIP_REQUIRE_VIRTUALENV=true # use pip --isolated to bypass
export GIT_EDITOR="nvim"
export EDITOR="nvim"

add_to_path append "$HOME/.docker/bin"
add_to_path append "$HOME/.cargo/bin"
add_to_path append "$HOME/go/bin"
add_to_path append "$DOTFILES_BREW_PREFIX/opt/mysql-client/bin"
add_to_path prepend "$DOTFILES_BREW_PREFIX/opt/gnu-sed/libexec/gnubin"
add_to_path append "$HOME/.lmstudio/bin" # Added by LM Studio CLI (lms)
add_to_path append "$HOME/.opencode/bin" # Added by OpenCode AI

# NOTE: the last prepend appears first in $PATH, so make sure the order is correct below
add_to_path prepend "$HOME/.local/bin" # user-installed binaries
# HACK: shell/bin is prepended in sourcing.sh after Nix daemon to ensure it comes first

# Source Home Manager session variables (includes sessionPath)
if [ -f "$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh" ]; then
	# shellcheck source=/dev/null
	source "$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh"
fi

# load .env file if it exists
if [ -f "$HOME/.shell/.env" ]; then
	set -a
	# shellcheck source=/dev/null
	source "$HOME/.shell/.env"
	set +a
else
	echo "Warning: $HOME/.shell/.env does not exist"
fi

# Per-platform settings
case $(uname) in
Darwin)
	# commands for macOS go here

	add_to_path append "/Applications/Visual Studio Code.app/Contents/Resources/app/bin"

	add_to_path append "/Applications/Obsidian.app/Contents/MacOS"

	;;

Linux)
	# commands for Linux go here

	;;

*) ;;
esac