#!/bin/bash
# KOTA Sensorbox Technician Tool - update to the newest released version.
# Checks Gitea for the newest release tag (vX.Y) and downloads only what changed (git).
# Works in a git clone and in a folder unpacked from a release zip (it is connected on first run).
# If Finder refuses to open this file, run it once as:  bash update_macos.command
cd "$(dirname "$0")" || exit 1

REPO_URL="${KOTA_REPO_URL:-https://gitea.kota-app.com/kkallas/kota-technician-tool.git}"
export UV_PROJECT_ENVIRONMENT="${UV_PROJECT_ENVIRONMENT:-$HOME/Library/Caches/KotaTechnicianTool/venv}"
export PATH="$HOME/.local/bin:$PATH"

finish() {
    [ -z "$KOTA_NO_PAUSE" ] && [ -t 0 ] && read -r -p "Press Enter to close..." _
    exit "$1"
}
fail() { echo; echo "[!] $*"; echo "[!] Update did not finish."; finish 1; }

# ---- git (macOS: the Command Line Tools installer offers it) --------------
if ! git --version >/dev/null 2>&1; then
    if [ "$(uname)" = Darwin ]; then
        xcode-select --install >/dev/null 2>&1
        fail "Git is being installed (Apple Command Line Tools). Run this again when the installer has finished."
    fi
    fail "Git is not installed."
fi

# ---- connect a folder unpacked from a zip ----------------------------------
if [ ! -d .git ]; then
    echo "Connecting this folder to $REPO_URL ..."
    git init -q && git remote add origin "$REPO_URL" || fail "Cannot set up git in this folder."
fi

# A developer copy follows a branch; it is updated with "git pull", not here.
if git rev-parse -q --verify HEAD >/dev/null 2>&1 && branch=$(git symbolic-ref -q --short HEAD); then
    echo "This is a developer copy on branch $branch. Update it with: git pull"
    finish 0
fi

echo "Checking for a new version..."
git fetch --quiet --force --tags origin ||
    fail "Cannot reach $REPO_URL. Check the Internet connection and your Gitea login, then try again."

latest=$(git tag -l 'v*' --sort=-v:refname | head -n 1)
[ -n "$latest" ] || fail "No released version found on the server."
current=$(git describe --tags --exact-match HEAD 2>/dev/null)

if [ "$current" = "$latest" ]; then
    echo "You already have the newest version $latest."
else
    if [ -n "$current" ]; then
        if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
            echo "Some tool files in this folder were changed by hand. They will be replaced by $latest."
            read -r -p "Continue? [y/N] " answer
            [[ "$answer" =~ ^[Yy]$ ]] || fail "Cancelled."
        fi
        echo "Updating $current -> $latest. Changes:"
        git --no-pager log --oneline --no-decorate "$current..$latest"
    else
        echo "Installing $latest..."
    fi
    git -c advice.detachedHead=false checkout -q -f "$latest" || fail "Checkout of $latest failed."
    echo "Now on $latest."
fi

# ---- Python libraries (only what changed) ----------------------------------
if ! command -v uv >/dev/null 2>&1; then
    echo "Installing uv (Python package runner, current user only)..."
    curl -LsSf https://astral.sh/uv/install.sh | sh || fail "uv installation failed. Ask the firmware team for help."
fi
echo "Checking Python libraries..."
uv sync --frozen --no-dev --python 3.12 --quiet || fail "Installing Python libraries failed."
echo
echo "Done. Start the tool with run_macos.command."
finish 0