#!/bin/bash

# Default configuration for bootc image creation
# This file sets default values that can be overridden by user configuration

# Container configuration
export CONTAINER_IMAGE="${CONTAINER_IMAGE:-localhost/debian-bootc:ostree-transformed-v2}"
export CONTAINER_TAG="${CONTAINER_TAG:-latest}"

# Output configuration
export OUTPUT_DIR="${OUTPUT_DIR:-./output}"
export IMAGE_SIZE_GB="${IMAGE_SIZE_GB:-10}"
export IMAGE_NAME="${IMAGE_NAME:-debian-bootc}"

# Build configuration
export BUILD_TYPE="${BUILD_TYPE:-container}"  # container or chroot
export USE_APT_CACHER="${USE_APT_CACHER:-true}"
export APT_CACHER_URL="${APT_CACHER_URL:-http://localhost:3142}"

# OSTree configuration
export OSTREE_BRANCH="${OSTREE_BRANCH:-debian/trixie/x86_64}"
export OSTREE_SUBJECT="${OSTREE_SUBJECT:-Debian trixie system}"
export OSTREE_MODE="${OSTREE_MODE:-bare-user}"

# Bootloader configuration
export BOOTLOADER_TYPE="${BOOTLOADER_TYPE:-grub}"  # grub or systemd-boot
export KERNEL_VERSION="${KERNEL_VERSION:-6.12.41+deb13-amd64}"
export CONSOLE_OPTIONS="${CONSOLE_OPTIONS:-console=tty0 console=ttyS0,115200n8}"

# User configuration
export DEFAULT_USER="${DEFAULT_USER:-debian}"
export DEFAULT_PASSWORD="${DEFAULT_PASSWORD:-debian123}"
export USER_UID="${USER_UID:-1000}"
export USER_GID="${USER_GID:-1000}"

# Network configuration
export ENABLE_SSH="${ENABLE_SSH:-true}"
export ENABLE_NETWORK="${ENABLE_NETWORK:-true}"

# Output formats
export OUTPUT_FORMATS="${OUTPUT_FORMATS:-qcow2}"  # qcow2, iso, img, vmdk, vdi, all
export KEEP_RAW="${KEEP_RAW:-true}"

# Performance configuration
export PARALLEL_JOBS="${PARALLEL_JOBS:-$(nproc)}"
export COMPRESSION_LEVEL="${COMPRESSION_LEVEL:-6}"

# Validation configuration
export VERIFY_IMAGE="${VERIFY_IMAGE:-true}"
export VERIFY_FILESYSTEM="${VERIFY_FILESYSTEM:-true}"
export VERIFY_BOOTLOADER="${VERIFY_BOOTLOADER:-true}"

# Cleanup configuration
export CLEANUP_WORK_DIR="${CLEANUP_WORK_DIR:-true}"
export CLEANUP_TEMP_FILES="${CLEANUP_TEMP_FILES:-true}"

# Logging configuration
export LOG_LEVEL="${LOG_LEVEL:-info}"  # debug, info, warn, error
export VERBOSE="${VERBOSE:-false}"

# Security configuration
export SIGN_IMAGES="${SIGN_IMAGES:-false}"
export GPG_KEY="${GPG_KEY:-}"

# Architecture configuration
export TARGET_ARCH="${TARGET_ARCH:-amd64}"
export TARGET_DEBIAN_RELEASE="${TARGET_DEBIAN_RELEASE:-trixie}"

# Package configuration
export BASE_PACKAGES="${BASE_PACKAGES:-systemd systemd-sysv linux-image-amd64 grub-pc ostree ostree-boot openssh-server sudo}"
export ADDITIONAL_PACKAGES="${ADDITIONAL_PACKAGES:-curl wget vim less man-db}"

# Debian release configuration
export DEBIAN_RELEASE="${DEBIAN_RELEASE:-trixie}"  # Default to trixie (Debian 13)
export DEBIAN_RELEASES="trixie forky sid"
export DEBIAN_RELEASE_NAMES="trixie=Debian 13 forky=Debian 14 sid=Debian Unstable"
export DEBIAN_RELEASE_DESCRIPTIONS="trixie=Debian 13 (Trixie) - Testing forky=Debian 14 (Forky) - Unstable sid=Debian Sid - Always Unstable"

# Set TARGET_DEBIAN_RELEASE based on DEBIAN_RELEASE
export TARGET_DEBIAN_RELEASE="$DEBIAN_RELEASE"

# Timeout configuration
export BUILD_TIMEOUT="${BUILD_TIMEOUT:-3600}"  # 1 hour
export EXTRACTION_TIMEOUT="${EXTRACTION_TIMEOUT:-1800}"  # 30 minutes
export CONVERSION_TIMEOUT="${CONVERSION_TIMEOUT:-900}"  # 15 minutes

# Print configuration
print_config() {
    echo "=== Bootc Image Creation Configuration ==="
    echo "Container: $CONTAINER_IMAGE"
    echo "Build Type: $BUILD_TYPE"
    echo "Output Directory: $OUTPUT_DIR"
    echo "Image Size: ${IMAGE_SIZE_GB}GB"
    echo "Output Formats: $OUTPUT_FORMATS"
    echo "Bootloader: $BOOTLOADER_TYPE"
    echo "Kernel: $KERNEL_VERSION"
    echo "User: $DEFAULT_USER:$DEFAULT_PASSWORD"
    echo "Architecture: $TARGET_ARCH"
    echo "Debian Release: $DEBIAN_RELEASE ($(get_debian_release_description "$DEBIAN_RELEASE"))"
    echo "OSTree Branch: $OSTREE_BRANCH"
    echo "Use apt-cacher: $USE_APT_CACHER"
    echo "Enable SSH: $ENABLE_SSH"
    echo "Verify Image: $VERIFY_IMAGE"
    echo "Log Level: $LOG_LEVEL"
    echo "=========================================="
}

# Validate Debian release
validate_debian_release() {
    local release="$1"
    for valid_release in $DEBIAN_RELEASES; do
        if [ "$release" = "$valid_release" ]; then
            return 0
        fi
    done
    return 1
}

# Get Debian release description
get_debian_release_description() {
    local release="$1"
    echo "$DEBIAN_RELEASE_DESCRIPTIONS" | tr ' ' '\n' | grep "^$release=" | cut -d'=' -f2
}

# Validate configuration
validate_config() {
    local errors=()
    
    # Check required values
    if [ -z "$CONTAINER_IMAGE" ]; then
        errors+=("CONTAINER_IMAGE is required")
    fi
    
    if [ -z "$OUTPUT_DIR" ]; then
        errors+=("OUTPUT_DIR is required")
    fi
    
    if [ -z "$IMAGE_SIZE_GB" ] || ! [[ "$IMAGE_SIZE_GB" =~ ^[0-9]+$ ]]; then
        errors+=("IMAGE_SIZE_GB must be a positive integer")
    fi
    
    if [ -z "$BUILD_TYPE" ] || ! [[ "$BUILD_TYPE" =~ ^(container|chroot)$ ]]; then
        errors+=("BUILD_TYPE must be 'container' or 'chroot'")
    fi
    
    if [ -z "$BOOTLOADER_TYPE" ] || ! [[ "$BOOTLOADER_TYPE" =~ ^(grub|systemd-boot)$ ]]; then
        errors+=("BOOTLOADER_TYPE must be 'grub' or 'systemd-boot'")
    fi
    
    if [ -z "$TARGET_ARCH" ]; then
        errors+=("TARGET_ARCH is required")
    fi
    
    # Validate Debian release
    if [ -z "$DEBIAN_RELEASE" ]; then
        errors+=("DEBIAN_RELEASE is required")
    elif ! validate_debian_release "$DEBIAN_RELEASE"; then
        errors+=("DEBIAN_RELEASE must be one of: $DEBIAN_RELEASES")
    fi
    
    # Report errors
    if [ ${#errors[@]} -gt 0 ]; then
        echo "Configuration validation failed:" >&2
        for error in "${errors[@]}"; do
            echo "  - $error" >&2
        done
        return 1
    fi
    
    return 0
}