# ------------------------------------------------------------
# Effici EPC Energy Prediction API (HF Spaces / Docker safe)
# ------------------------------------------------------------
FROM python:3.12-slim

# ------------------------------------------------------------
# Python runtime hygiene
# ------------------------------------------------------------
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# ------------------------------------------------------------
# Working directory
# ------------------------------------------------------------
WORKDIR /app

# ------------------------------------------------------------
# System dependencies (minimal)
# ------------------------------------------------------------
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    && rm -rf /var/lib/apt/lists/*

# ------------------------------------------------------------
# Python dependencies
# ------------------------------------------------------------
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt

# ------------------------------------------------------------
# Application code
# ------------------------------------------------------------
COPY app ./app
COPY src ./src

# ------------------------------------------------------------
# Credential bootstrap + server start
# ------------------------------------------------------------
RUN printf '%s\n' \
  '#!/bin/sh' \
  'set -e' \
  '' \
  'echo "🚀 Starting Effici API"' \
  '' \
  '# -------------------------------' \
  '# GCP credentials bootstrap' \
  '# -------------------------------' \
  'if [ -n "$GOOGLE_APPLICATION_CREDENTIALS_JSON" ]; then' \
  '  echo "$GOOGLE_APPLICATION_CREDENTIALS_JSON" > /tmp/gcp-creds.json' \
  '  export GOOGLE_APPLICATION_CREDENTIALS=/tmp/gcp-creds.json' \
  '  export CLOUDSDK_AUTH_CREDENTIAL_FILE_OVERRIDE=/tmp/gcp-creds.json' \
  '  echo "✅ GCP credentials written to /tmp/gcp-creds.json"' \
  'else' \
  '  echo "⚠️ GOOGLE_APPLICATION_CREDENTIALS_JSON not set"' \
  'fi' \
  '' \
  'exec uvicorn app.main:app --host 0.0.0.0 --port ${PORT}' \
  > /app/start.sh && chmod +x /app/start.sh

# ------------------------------------------------------------
# Expose API port
# ------------------------------------------------------------
EXPOSE 7860

# ------------------------------------------------------------
# Launch
# ------------------------------------------------------------
CMD ["/app/start.sh"]