#!/bin/bash
set -euo pipefail

# Resolve paths
TOOL_DIR="$HOME/tools/coe-mirror"
PCLOUD_TARGET="$HOME/pCloudDrive/Hacking/Nightmare_Eclipse"
PENDING_DIR="$HOME/.local/share/coe-mirror/pending"
LOG_DIR="$HOME/.local/share/coe-mirror"
USER_UNIT_DIR="$HOME/.config/systemd/user"

# Check if pCloud mount exists (warning only, not fatal)
if ! mountpoint -q "$HOME/pCloudDrive" 2>/dev/null; then
  echo "WARNING: pCloud mount not detected at ~/pCloudDrive — install will proceed but coe-mirror will queue everything locally until the mount appears."
fi

# Create directories
mkdir -p "$PENDING_DIR" "$LOG_DIR" "$USER_UNIT_DIR"
if mountpoint -q "$HOME/pCloudDrive" 2>/dev/null; then
  mkdir -p "$PCLOUD_TARGET"
fi

# Install runtime dependency (requests) if missing. Dev deps (pytest, requests-mock)
# are only needed by the test suite — install them separately in a venv if you plan to test.
if python3 -c "import requests" 2>/dev/null; then
  echo "Runtime dep 'requests' already importable system-wide; skipping pip install."
else
  echo "Installing runtime dependency: requests"
  if ! pip install --user requests 2>&1 | tail -5; then
    echo "ERROR: pip install --user failed (PEP 668 externally-managed environment?)."
    echo "To install in a virtualenv instead:"
    echo "  python3 -m venv $TOOL_DIR/.venv"
    echo "  $TOOL_DIR/.venv/bin/pip install requests"
    echo "  # then edit systemd/coe-mirror.service ExecStart to point at the venv python"
    exit 1
  fi
fi

# Copy unit files
cp "$TOOL_DIR/systemd/coe-mirror.service" "$USER_UNIT_DIR/"
cp "$TOOL_DIR/systemd/coe-mirror.timer" "$USER_UNIT_DIR/"

# Reload and enable
systemctl --user daemon-reload
systemctl --user enable --now coe-mirror.timer

# Show next scheduled run
echo ""
echo "Next scheduled run:"
systemctl --user list-timers coe-mirror.timer --no-pager | head -5

# Summary
echo ""
echo "=== Installation Summary ==="
echo "Installed. Timer: coe-mirror.timer (enabled & active)."
echo "pCloud target: $PCLOUD_TARGET (exists? $([ -d "$PCLOUD_TARGET" ] && echo "yes" || echo "no"))"
echo "Pending dir: $PENDING_DIR"
echo "Log: ~/.local/share/coe-mirror/coe-mirror.log"
echo ""
echo "To trigger immediately: systemctl --user start coe-mirror.service"
echo "To uninstall: systemctl --user disable --now coe-mirror.timer && rm $USER_UNIT_DIR/coe-mirror.{service,timer}"