#!/usr/bin/env bash
# linux-setup.sh — check what a Linux build of OpsLog needs, then build it.
#
# Run it from the repository root:   ./scripts/linux-setup.sh
#
# It never installs anything itself. It prints the one command your distribution
# needs and stops, because a script that runs sudo on somebody else's machine is
# a script nobody should run. Once the dependencies are in, run it again and it
# builds.
set -u

red()  { printf '\033[31m%s\033[0m\n' "$*"; }
grn()  { printf '\033[32m%s\033[0m\n' "$*"; }
ylw()  { printf '\033[33m%s\033[0m\n' "$*"; }
head_() { printf '\n\033[1m== %s\033[0m\n' "$*"; }

missing=0
note() { red "  MISSING: $*"; missing=1; }
ok()   { grn "  ok: $*"; }

head_ "Distribution"
if [ -r /etc/os-release ]; then
	# shellcheck disable=SC1091
	. /etc/os-release
	echo "  ${PRETTY_NAME:-unknown}"
	family="${ID_LIKE:-$ID}"
else
	echo "  unknown (no /etc/os-release)"
	family=""
fi

head_ "Build dependencies"
have() { command -v "$1" >/dev/null 2>&1; }
pkg()  { pkg-config --exists "$1" 2>/dev/null; }

have gcc || have cc || note "a C compiler (Wails links against the system WebKit, so cgo is required here)"
have pkg-config || note "pkg-config"
pkg gtk+-3.0 || note "GTK 3 development headers"

# Wails 2.10+ builds against webkit2gtk-4.1; Debian 12 and older still ship 4.0,
# which works with an extra build tag. Detect which one is present rather than
# telling the operator to guess.
webkit_tags=""
if pkg webkit2gtk-4.1; then
	ok "webkit2gtk-4.1"
elif pkg webkit2gtk-4.0; then
	ok "webkit2gtk-4.0 (older — will build with -tags webkit2_40)"
	webkit_tags="-tags webkit2_40"
else
	note "webkit2gtk development headers (4.1 preferred, 4.0 accepted)"
fi

# Node, and its VERSION — this is the trap on an LTS base. Ubuntu 22.04 (so
# Linux Mint 21) ships node 12, and Vite needs 18. The build fails deep inside
# the frontend with a syntax error that says nothing about the real cause, so
# catch it here where it can be named.
if have node; then
	nodemaj=$(node -p 'process.versions.node.split(".")[0]' 2>/dev/null || echo 0)
	if [ "${nodemaj:-0}" -ge 18 ]; then
		ok "node $(node -v)"
	else
		note "node 18 or newer (you have $(node -v) — the distribution package is too old for Vite)"
		ylw "      curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash - && sudo apt install nodejs"
		ylw "      or use nvm:  https://github.com/nvm-sh/nvm"
	fi
else
	note "node 18+"
fi
have npm || note "npm"

head_ "Go"
if have go; then
	gov=$(go version | awk '{print $3}')
	ok "$gov"
	# 1.25 is what go.mod asks for. No distribution ships it yet — Ubuntu 22.04
	# (Mint 21) has 1.18, Ubuntu 24.04 (Mint 22) has 1.22 — so `apt install
	# golang-go` gets you a Go that cannot build this repository at all.
	if ! go version | grep -Eq 'go1\.(2[5-9]|[3-9][0-9])'; then
		note "go 1.25+ — $gov is too old for go.mod, and no apt package is new enough"
		ylw "      wget https://go.dev/dl/go1.25.1.linux-amd64.tar.gz"
		ylw "      sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.25.1.linux-amd64.tar.gz"
		ylw "      echo 'export PATH=/usr/local/go/bin:\$HOME/go/bin:\$PATH' >> ~/.profile   # then log out and back in"
	fi
else
	note "go 1.25+ — from https://go.dev/dl/, NOT from apt (no distribution ships 1.25 yet)"
fi

head_ "Wails CLI"
WAILS="$(command -v wails || true)"
[ -z "$WAILS" ] && [ -x "$HOME/go/bin/wails" ] && WAILS="$HOME/go/bin/wails"
if [ -n "$WAILS" ]; then
	ok "$($WAILS version 2>/dev/null | head -1)"
else
	note "the wails CLI:  go install github.com/wailsapp/wails/v2/cmd/wails@v2.11.0"
	ylw "  (then make sure ~/go/bin is on your PATH)"
fi

if [ "$missing" -ne 0 ]; then
	head_ "Install these first"
	case "$family" in
		*debian*|*ubuntu*)
			echo "  sudo apt install build-essential pkg-config libgtk-3-dev libwebkit2gtk-4.1-dev"
			echo "  (on Debian 12 and older: libwebkit2gtk-4.0-dev)"
			echo
			echo "  Go and node are NOT in that line on purpose — the apt versions are too"
			echo "  old on every current Ubuntu/Mint base. See the notes above for both." ;;
		*fedora*|*rhel*)
			echo "  sudo dnf install gcc-c++ pkgconf-pkg-config gtk3-devel webkit2gtk4.1-devel nodejs npm" ;;
		*arch*)
			echo "  sudo pacman -S base-devel pkgconf gtk3 webkit2gtk-4.1 nodejs npm" ;;
		*suse*)
			echo "  sudo zypper install -t pattern devel_basis && sudo zypper install pkg-config gtk3-devel webkit2gtk3-soup2-devel nodejs npm" ;;
		*)
			echo "  a C compiler, pkg-config, GTK 3 and webkit2gtk development packages, node and npm" ;;
	esac
	echo
	echo "Then run this script again."
	exit 1
fi

head_ "Serial ports"
# The single most common reason a rig that works in WSJT-X refuses to open here.
if id -nG | tr ' ' '\n' | grep -qx 'dialout\|uucp'; then
	ok "you are in the serial group"
else
	ylw "  You are NOT in the 'dialout' group (or 'uucp' on Arch/Fedora)."
	ylw "  CAT, keyers, rotators and amplifiers will fail with \"permission denied\"."
	ylw "      sudo usermod -aG dialout \$USER      # then log out and back in"
fi

head_ "Sound server"
if have pactl && pactl info >/dev/null 2>&1; then
	ok "$(pactl info | sed -n 's/^Server Name: //p')"
else
	ylw "  No PulseAudio/PipeWire server answered. The voice keyer, the QSO"
	ylw "  recorder and the CW decoder will report they cannot reach it."
	ylw "  Everything else works without one."
fi

head_ "Building"
echo "  wails build $webkit_tags"
# shellcheck disable=SC2086
"$WAILS" build $webkit_tags || { red "Build failed."; exit 1; }

head_ "Done"
grn "  ./build/bin/OpsLog"
echo
echo "  First run creates build/bin/data/ beside the binary — a fresh, empty"
echo "  logbook. Do NOT copy config.json over from Windows: it holds a Windows"
echo "  path. Point OpsLog at your real logbook from Settings ▸ Database."
echo
echo "  If the window never opens, look at:"
echo "    ~/.cache/OpsLog/startup.log       (before the window)"
echo "    build/bin/data/opslog.log         (after it)"