# ============================================================
# Multi-stage Dockerfile for Alpine + Nginx + PHP-FPM
# Supports dynamic PHP versions based on Alpine version
#
# Build targets:
#   - builder:    Composer install and asset building
#   - runtime:    Base runtime with PHP and Nginx
#   - development: Dev tools (xdebug, phpunit, profiling)
#   - production:  Hardened production image (default)
# ============================================================

# Build arguments for version control
ARG ALPINE_VERSION=3.22
ARG PHP_VERSION=84

# ============================================================
# Stage 1: Builder - Install dependencies and build assets
# ============================================================
FROM alpine:${ALPINE_VERSION} AS builder

ARG PHP_VERSION
ENV PHP_VERSION=${PHP_VERSION}

# Install build dependencies
RUN apk add --no-cache \
    git \
    curl \
    php${PHP_VERSION} \
    php${PHP_VERSION}-phar \
    php${PHP_VERSION}-mbstring \
    php${PHP_VERSION}-openssl \
    php${PHP_VERSION}-curl \
    php${PHP_VERSION}-iconv \
    php${PHP_VERSION}-tokenizer

# Create php symlink
RUN ln -s /usr/bin/php${PHP_VERSION} /usr/bin/php

# Install Composer
RUN curl -sS https://getcomposer.org/installer | php -- \
    --install-dir=/usr/bin --filename=composer

WORKDIR /build

# Copy application code
COPY product/ ./

# Install dependencies (only if composer.json exists)
RUN if [ -f composer.json ]; then \
        composer install \
            --no-dev \
            --optimize-autoloader \
            --no-interaction \
            --no-progress \
            --prefer-dist; \
    fi
COPY patch/ ./

# ============================================================
# Stage 2: Runtime - Base image with PHP and Nginx
# ============================================================
FROM alpine:${ALPINE_VERSION} AS runtime

ARG PHP_VERSION
ENV PHP_VERSION=${PHP_VERSION}
ENV PHP_INI_DIR=/etc/php${PHP_VERSION}
ENV APP_ENV=production

LABEL maintainer="Snider <snider@host.uk.com>"
LABEL org.opencontainers.image.source="https://github.com/host-uk/docker-server-php"
LABEL org.opencontainers.image.description="Production-ready Alpine+Nginx+PHP-FPM base image"
LABEL org.opencontainers.image.licenses="EUPL-1.2"
LABEL org.opencontainers.image.vendor="Host UK"
LABEL org.opencontainers.image.title="Docker Server PHP"
LABEL org.opencontainers.image.documentation="https://github.com/host-uk/docker-server-php"

# Install only runtime dependencies
RUN apk add --no-cache \
    nginx \
    nginx-mod-http-brotli \
    php${PHP_VERSION} \
    php${PHP_VERSION}-bcmath \
    php${PHP_VERSION}-ctype \
    php${PHP_VERSION}-curl \
    php${PHP_VERSION}-dom \
    php${PHP_VERSION}-exif \
    php${PHP_VERSION}-fileinfo \
    php${PHP_VERSION}-fpm \
    php${PHP_VERSION}-gd \
    php${PHP_VERSION}-iconv \
    php${PHP_VERSION}-intl \
    php${PHP_VERSION}-mbstring \
    php${PHP_VERSION}-mysqli \
    php${PHP_VERSION}-opcache \
    php${PHP_VERSION}-openssl \
    php${PHP_VERSION}-pdo \
    php${PHP_VERSION}-pdo_mysql \
    php${PHP_VERSION}-phar \
    php${PHP_VERSION}-posix \
    php${PHP_VERSION}-redis \
    php${PHP_VERSION}-session \
    php${PHP_VERSION}-simplexml \
    php${PHP_VERSION}-sodium \
    php${PHP_VERSION}-tokenizer \
    php${PHP_VERSION}-xml \
    php${PHP_VERSION}-xmlreader \
    php${PHP_VERSION}-xmlwriter \
    php${PHP_VERSION}-zip \
    supervisor \
    curl \
    ca-certificates \
    gettext

# Create php symlink
RUN ln -s /usr/bin/php${PHP_VERSION} /usr/bin/php

WORKDIR /var/www/html

# Copy built application from builder
COPY --chmod=755 --chown=nobody:nobody --from=builder /build /var/www/html

# Copy configuration templates
COPY --chmod=644 --chown=nobody:nobody config/nginx.conf /etc/nginx/nginx.conf
COPY --chmod=755 --chown=nobody:nobody config/conf.d /etc/nginx/conf.d/
COPY --chmod=644 --chown=nobody:nobody config/fpm-pool.conf.template ${PHP_INI_DIR}/php-fpm.d/www.conf.template
COPY --chmod=644 --chown=nobody:nobody config/php.ini.template ${PHP_INI_DIR}/conf.d/custom.ini.template
# Create supervisor directory with proper permissions and copy config
RUN mkdir -p /etc/supervisor/conf.d
COPY --chmod=644 config/supervisord.conf /etc/supervisor/conf.d/supervisord.conf

# Copy and set up entrypoint
COPY --chmod=755 --chown=nobody:nobody scripts/entrypoint.sh /usr/local/bin/entrypoint.sh

# Set permissions for system directories
RUN chown -R nobody:nobody /run /var/lib/nginx /var/log/nginx ${PHP_INI_DIR}

USER nobody

EXPOSE 80

HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD curl --silent --fail http://127.0.0.1/health || exit 1

ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]

# ============================================================
# Stage 3: Development - Full dev environment with debugging
# ============================================================
FROM runtime AS development

ARG PHP_VERSION
ENV PHP_VERSION=${PHP_VERSION}
ENV PHP_INI_DIR=/etc/php${PHP_VERSION}
ENV APP_ENV=development
ENV XDEBUG_MODE=develop,debug,coverage

USER root

# Install development tools
RUN apk add --no-cache \
    php${PHP_VERSION}-xdebug \
    php${PHP_VERSION}-phpdbg \
    php${PHP_VERSION}-pecl-pcov \
    git \
    make \
    bash \
    vim \
    nano

# Install Composer in dev image
RUN curl -sS https://getcomposer.org/installer | php -- \
    --install-dir=/usr/bin --filename=composer

# Copy xdebug configuration
COPY --chmod=644 config/xdebug.ini ${PHP_INI_DIR}/conf.d/50_xdebug.ini

# Copy development php.ini overrides
COPY --chmod=644 config/php-dev.ini ${PHP_INI_DIR}/conf.d/60_development.ini

# Install PHPUnit, PHPStan, PHP_CodeSniffer globally
RUN composer global require --no-interaction \
    phpunit/phpunit:^11.0 \
    phpstan/phpstan:^2.0 \
    squizlabs/php_codesniffer:^3.0 \
    friendsofphp/php-cs-fixer:^3.0

# Add composer bin to PATH
ENV PATH="/root/.composer/vendor/bin:${PATH}"

# Reset permissions
RUN chown -R nobody:nobody /run /var/lib/nginx /var/log/nginx ${PHP_INI_DIR}

USER nobody

# Override healthcheck for development (more lenient)
HEALTHCHECK --interval=60s --timeout=30s --start-period=10s --retries=5 \
  CMD curl --silent --fail http://127.0.0.1/health || exit 1

# ============================================================
# Stage 4: Production - Hardened, optimized production image
# ============================================================
FROM runtime AS production

ARG PHP_VERSION
ENV PHP_VERSION=${PHP_VERSION}
ENV PHP_INI_DIR=/etc/php${PHP_VERSION}
ENV APP_ENV=production

USER root

# Copy production-optimized configurations
COPY --chmod=644 config/opcache-prod.ini ${PHP_INI_DIR}/conf.d/10_opcache_prod.ini
COPY --chmod=644 config/php-prod.ini ${PHP_INI_DIR}/conf.d/60_production.ini
COPY --chmod=644 config/nginx-performance.conf /etc/nginx/conf.d/performance.conf

# Security hardening
RUN set -eux; \
    # Remove unnecessary packages
    apk del --no-cache \
        fortify-headers \
        apk-tools 2>/dev/null || true; \
    # Remove package cache
    rm -rf /var/cache/apk/* /tmp/* /var/tmp/*; \
    # Remove shell history
    rm -f /root/.ash_history /root/.bash_history 2>/dev/null || true; \
    # Set restrictive permissions on sensitive directories
    chmod 700 /root 2>/dev/null || true; \
    # Remove crontabs
    rm -rf /var/spool/cron /etc/crontabs /etc/periodic 2>/dev/null || true; \
    # Remove unnecessary user accounts
    sed -i -r '/^(nobody|root)/!d' /etc/passwd 2>/dev/null || true; \
    sed -i -r '/^(nobody|root)/!d' /etc/shadow 2>/dev/null || true; \
    sed -i -r '/^(nobody|root|nogroup)/!d' /etc/group 2>/dev/null || true; \
    # Remove interactive shells for system users
    sed -i -r 's#^(.*):[^:]*$#\1:/sbin/nologin#' /etc/passwd 2>/dev/null || true

# Reset permissions
RUN chown -R nobody:nobody /run /var/lib/nginx /var/log/nginx ${PHP_INI_DIR}

USER nobody

# Production healthcheck (strict)
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
  CMD curl --silent --fail http://127.0.0.1/health || exit 1