#!/usr/bin/env bash
# shellcheck disable=SC2086

# Installs superfile (terminal file manager) — https://github.com/yorukot/superfile
# Also installs JetBrains Mono Nerd Font (required for proper icon display).
#
# Mac/Linux: Uses the official superfile installer
# Windows:   See install-superfile.ps1 (winget)
#
# Supported platforms:
#   macOS    : Apple Silicon (arm64), Intel (x86_64)
#   Linux    : x86_64, aarch64/arm64

set -euo pipefail

# ────────────────────────────────────────────
# Utility functions (all stderr output)
# ────────────────────────────────────────────
info() { echo "[INFO]  $*" >&2; }
warn() { echo "[WARN]  $*" >&2; }
error() {
	echo "[ERROR] $*" >&2
	exit 1
}
success() { echo "[OK]    $*" >&2; }

# ────────────────────────────────────────────
# Ensure Homebrew is available on macOS
# ────────────────────────────────────────────
ensure_brew() {
	if command -v brew &>/dev/null; then
		return 0
	fi
	info "Homebrew is not installed. Installing Homebrew..."
	/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
	if [ -d /opt/homebrew/bin ]; then
		export PATH="/opt/homebrew/bin:$PATH"
	fi
	if [ -d /usr/local/bin ]; then
		export PATH="/usr/local/bin:$PATH"
	fi
	command -v brew &>/dev/null || error "Homebrew installation failed. Install it manually: https://brew.sh/"
	success "Homebrew installed"
}

# ────────────────────────────────────────────
# Check required commands
# ────────────────────────────────────────────
for cmd in curl; do
	command -v "$cmd" &>/dev/null || error "'$cmd' command is required."
done

# ────────────────────────────────────────────
# Step 1: Install superfile
# ────────────────────────────────────────────
info "Installing superfile (terminal file manager)..."

if command -v spf &>/dev/null; then
	CURRENT_VER="$(spf --version 2>/dev/null || echo 'unknown')"
	info "superfile is already installed ($CURRENT_VER). Skipping installation."
else
	bash -c "$(curl -sLo- https://superfile.dev/install.sh)"
	success "superfile installed via official installer"
fi

# Verify spf is available
if command -v spf &>/dev/null; then
	success "superfile is available: $(command -v spf)"
else
	warn "superfile was not found in PATH after installation. You may need to open a new terminal."
fi

# ────────────────────────────────────────────
# Step 2: Install JetBrains Mono Nerd Font
# ────────────────────────────────────────────
info "Installing JetBrains Mono Nerd Font (required for icon display)..."

OS="$(uname -s)"

case "$OS" in
Darwin)
	brew install --cask font-jetbrains-mono-nerd-font
	success "JetBrains Mono Nerd Font installed via Homebrew"
	;;
Linux)
	FONT_DIR="${HOME}/.local/share/fonts"
	FONT_NAME="JetBrainsMonoNerdFont"
	FONT_ZIP="JetBrainsMono.tar.xz"
	FONT_URL="https://github.com/ryanoasis/nerd-fonts/releases/latest/download/${FONT_ZIP}"

	# Check if font is already installed
	if fc-list 2>/dev/null | grep -qi "$FONT_NAME"; then
		info "JetBrains Mono Nerd Font is already installed. Skipping."
	else
		TMPDIR="$(mktemp -d)"
		trap '[ -d "${TMPDIR:-}" ] && rm -rf "$TMPDIR"' EXIT

		info "Downloading: $FONT_URL"
		curl -fsSL --progress-bar -o "${TMPDIR}/${FONT_ZIP}" "$FONT_URL" ||
			warn "Failed to download Nerd Font. Icons may not display correctly."

		if [ -f "${TMPDIR}/${FONT_ZIP}" ]; then
			mkdir -p "$FONT_DIR"
			tar -xf "${TMPDIR}/${FONT_ZIP}" -C "$FONT_DIR" 2>/dev/null ||
				warn "Failed to extract font archive."

			# Rebuild font cache
			if command -v fc-cache &>/dev/null; then
				fc-cache -f "$FONT_DIR" 2>/dev/null
			fi
			success "JetBrains Mono Nerd Font installed to $FONT_DIR"
		fi
	fi
	;;
*)
	warn "JetBrains Mono Nerd Font auto-install is not supported on $OS."
	warn "Install it manually from: https://github.com/ryanoasis/nerd-fonts"
	;;
esac

# ────────────────────────────────────────────
# Step 3: Post-install notes
# ────────────────────────────────────────────
info ""
info "=================================================="
success "superfile installation complete!"
info "=================================================="
info ""
info "Getting started:"
info "  spf              - Start superfile file manager"
info "  spf --help       - Show help"
info ""
info "Note: The command name is 'spf', not 'superfile'."
info ""
info "Key bindings (vim-style):"
info "  h/j/k/l         - Left/Down/Up/Right"
info "  Enter            - Open directory / file"
info "  y                - Yank (copy)"
info "  d                - Delete"
info "  r                - Rename"
info "  /                - Search"
info "  Tab              - Switch panel"