#!/usr/bin/env bash
set -e

# --- Cargar variables desde .env ---
if [ ! -f .env ]; then
  echo "❌ No se encontró .env. Crea uno basado en .env.example."
  exit 1
fi

export $(grep -v '^#' .env | xargs)

# --- VALIDACIÓN ---
: "${TARGET_USER:? ❌ Falta TARGET_USER en .env}"
: "${DAGU_PORT:? ❌ Falta DAGU_PORT en .env}"
: "${DAGU_USERNAME:? ❌ Falta DAGU_USERNAME en .env}"
: "${DAGU_PASSWORD:? ❌ Falta DAGU_PASSWORD en .env}"

# --- VARIABLES ---
USER_HOME="/home/$TARGET_USER"
BASHRC="$USER_HOME/.bashrc"
DAGU_CONFIG_DIR="$USER_HOME/.config/dagu"
DAGU_CONFIG_FILE="$DAGU_CONFIG_DIR/config.yaml"
SERVICE_FILE="/etc/systemd/system/dagu.service"
LOCAL_BIN="$USER_HOME/.local/bin"

# --- 1. INSTALAR DAGU ---
echo "🚀 Instalando Dagu..."
curl -L https://raw.githubusercontent.com/dagu-org/dagu/main/scripts/installer.sh | bash

# --- 2. AÑADIR PATH AL BASHRC SI NO EXISTE ---
if ! grep -Fxq "export PATH=\"\$PATH:$LOCAL_BIN\"" "$BASHRC"; then
  echo "🛠 Añadiendo $LOCAL_BIN al PATH en .bashrc..."
  echo "export PATH=\"\$PATH:$LOCAL_BIN\"" >> "$BASHRC"
else
  echo "✅ PATH ya contiene $LOCAL_BIN."
fi

# --- 3. CREAR CONFIGURACIÓN DE DAGU ---
echo "🧩 Creando archivo de configuración de Dagu..."
mkdir -p "$DAGU_CONFIG_DIR"
cat > "$DAGU_CONFIG_FILE" <<EOF
# ~/.config/dagu/config.yaml
host: 0.0.0.0
port: $DAGU_PORT

auth:
  basic:
    enabled: true
    username: $DAGU_USERNAME
    password: $DAGU_PASSWORD

paths:
  dagsDir: ~/.dagu/workflows
  logDir: /var/log/dagu
EOF

# Crear directorios
mkdir -p "$USER_HOME/.dagu/workflows"
sudo mkdir -p /var/log/dagu
sudo chown -R "$TARGET_USER":"$TARGET_USER" /var/log/dagu

# --- 4. RECARGAR BASHRC ---
echo "🔄 Recargando bashrc..."
source "$BASHRC"

# --- 5. CREAR SERVICIO SYSTEMD ---
echo "⚙️  Creando servicio systemd para Dagu..."
sudo bash -c "cat > $SERVICE_FILE" <<EOF
[Unit]
Description=Dagu Workflow Engine
After=network.target

[Service]
Type=simple
User=$TARGET_USER
WorkingDirectory=$USER_HOME
Environment=DAGU_PORT=$DAGU_PORT
ExecStart=$LOCAL_BIN/dagu start-all --port $DAGU_PORT
Restart=on-failure
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF

# --- ACTIVAR SERVICIO ---
echo "🧠 Activando servicio de Dagu..."
sudo systemctl daemon-reload
sudo systemctl enable dagu.service
sudo systemctl restart dagu.service

echo "✅ Dagu instalado y ejecutándose en el puerto $DAGU_PORT"
echo "🌐 Accede a: http://localhost:$DAGU_PORT con usuario '$DAGU_USERNAME' y contraseña '$DAGU_PASSWORD'"