#!/bin/sh
set -e

EVOLV_DIR="/data/evolv"
USER_DIR="/data"

echo "=== EVOLV Node-RED Development Container ==="
echo "Starting at $(date)"

# -------------------------------------------------------
# 1. Verify node_modules exist (first start or volume wipe)
# -------------------------------------------------------
if [ ! -d "$EVOLV_DIR/node_modules" ]; then
    echo "[entrypoint] node_modules missing — running npm install..."
    cd "$EVOLV_DIR"
    npm install --ignore-scripts
    echo "[entrypoint] npm install complete."
fi

# -------------------------------------------------------
# 2. Repair generalFunctions symlink if broken by bind mount
# -------------------------------------------------------
GF_LINK="$EVOLV_DIR/node_modules/generalFunctions"
GF_TARGET="$EVOLV_DIR/nodes/generalFunctions"

if [ -L "$GF_LINK" ] && [ ! -e "$GF_LINK" ]; then
    echo "[entrypoint] Repairing broken generalFunctions symlink..."
    rm -f "$GF_LINK"
    ln -s "$GF_TARGET" "$GF_LINK"
    echo "[entrypoint] Symlink repaired."
elif [ ! -e "$GF_LINK" ]; then
    echo "[entrypoint] Creating generalFunctions symlink..."
    ln -s "$GF_TARGET" "$GF_LINK"
    echo "[entrypoint] Symlink created."
fi

# -------------------------------------------------------
# 3. Install EVOLV into Node-RED user dir
#    This ensures node-red.nodes mapping is discovered
# -------------------------------------------------------
if [ ! -f "$USER_DIR/package.json" ]; then
    echo "[entrypoint] Initializing Node-RED user dir..."
    cat > "$USER_DIR/package.json" << 'PKGJSON'
{
    "name": "evolv-nodered-userdir",
    "description": "Node-RED user directory for EVOLV dev",
    "version": "1.0.0",
    "private": true,
    "dependencies": {}
}
PKGJSON
fi

# Link EVOLV package into the Node-RED user dir
cd "$USER_DIR"
npm install --no-save "$EVOLV_DIR" 2>/dev/null || {
    echo "[entrypoint] npm install of EVOLV package failed, attempting symlink fallback..."
    mkdir -p "$USER_DIR/node_modules"
    rm -rf "$USER_DIR/node_modules/EVOLV"
    ln -s "$EVOLV_DIR" "$USER_DIR/node_modules/EVOLV"
}

echo "[entrypoint] EVOLV nodes installed into Node-RED user dir."

# -------------------------------------------------------
# 4. Bootstrap Node-RED projects from examples/
#
# Each examples/<name>/ becomes a project under /data/projects/<name>/.
# The Projects feature (settings.js) needs each project to be a Git
# repo, so we git-init each on first copy. After that the projects
# live in the persistent nodered_data volume.
#
# Default project: pumpingstation-complete-example (settable via
# DEFAULT_PROJECT env var).
# -------------------------------------------------------
PROJECTS_DIR="/data/projects"
DEFAULT_PROJECT="${DEFAULT_PROJECT:-pumpingstation-complete-example}"
mkdir -p "$PROJECTS_DIR"

if [ -d "$EVOLV_DIR/examples" ]; then
    for src in "$EVOLV_DIR/examples"/*/; do
        [ -d "$src" ] || continue
        name=$(basename "$src")
        dst="$PROJECTS_DIR/$name"
        if [ -d "$dst" ]; then
            echo "[entrypoint] Project '$name' already exists in /data/projects, skipping bootstrap."
            continue
        fi
        echo "[entrypoint] Bootstrapping project '$name'..."
        cp -r "$src" "$dst"

        # Synthesize a Node-RED project package.json so the project is
        # recognised even when the source folder doesn't have one.
        if [ ! -f "$dst/package.json" ]; then
            cat > "$dst/package.json" << PKGJSON
{
  "name": "$name",
  "description": "EVOLV example: $name",
  "version": "0.1.0",
  "private": true,
  "node-red": {
    "settings": {
      "flowFile": "flow.json",
      "credentialsFile": "flow_cred.json"
    }
  }
}
PKGJSON
        fi

        # Git init + initial commit (Node-RED projects require Git).
        if [ ! -d "$dst/.git" ]; then
            (
                cd "$dst" && \
                git init -q -b main && \
                git config user.email "evolv-dev@local" && \
                git config user.name "EVOLV Dev" && \
                git add . && \
                git commit -q -m "Bootstrap project $name from examples/" || true
            )
        fi
        echo "[entrypoint] Project '$name' ready at $dst"
    done
fi

# -------------------------------------------------------
# 4b. Set the active project (Node-RED's projects state lives in
#     /data/.config.projects.json). Only set on first run; subsequent
#     boots respect the operator's last selection in the editor.
# -------------------------------------------------------
PROJ_STATE="/data/.config.projects.json"
if [ ! -f "$PROJ_STATE" ] && [ -d "$PROJECTS_DIR/$DEFAULT_PROJECT" ]; then
    echo "[entrypoint] Setting active project = $DEFAULT_PROJECT"
    cat > "$PROJ_STATE" << JSON
{
  "activeProject": "$DEFAULT_PROJECT",
  "projects": {
    "$DEFAULT_PROJECT": {}
  }
}
JSON
fi

# Legacy demo-flow.json fallback — kept for the no-projects case if a
# user flips projects.enabled = false in settings.js.
DEMO_FLOW="$EVOLV_DIR/docker/demo-flow.json"
FLOW_FILE="/data/flows.json"
if [ -f "$DEMO_FLOW" ] && [ ! -f "$FLOW_FILE" ]; then
    cp "$DEMO_FLOW" "$FLOW_FILE"
fi

# -------------------------------------------------------
# 5. Start Node-RED with custom settings
# -------------------------------------------------------
echo "[entrypoint] Starting Node-RED..."
exec node-red --settings "$EVOLV_DIR/docker/settings.js"