#!/bin/bash
# scripts/build-package.sh
# Clean package creation for furt API Gateway
# Creates distribution-ready packages excluding development files

set -euo pipefail

# Colors für Output (nur ASCII)
GREEN='\033[0;32m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m'

log_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

log_success() {
    echo -e "${GREEN}[OK]${NC} $1"
}

log_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# Version bestimmen
get_version() {
    local version=""

    if [[ $# -gt 0 ]]; then
        version="$1"
    elif [[ -f "VERSION" ]]; then
        version=$(cat VERSION | tr -d '\n\r' | sed 's/^v//')
    elif git rev-parse --git-dir >/dev/null 2>&1; then
        version=$(git describe --tags --abbrev=0 2>/dev/null | sed 's/^v//')
        if [[ -z "$version" ]]; then
            version="0.1.0-$(git rev-parse --short HEAD)"
        fi
    else
        version="0.1.0-$(date +%Y%m%d)"
    fi

    echo "$version"
}

# Validiere Projekt-Verzeichnis
validate_project() {
    if [[ ! -d "src" ]] || [[ ! -f "src/main.lua" ]]; then
        log_error "Nicht im furt-Projektverzeichnis oder src/main.lua fehlt"
        exit 1
    fi

    if [[ ! -d "config" ]]; then
        log_error "config/ Verzeichnis fehlt"
        exit 1
    fi

    log_success "Projekt-Struktur validiert"
}

# Erstelle sauberes Paket mit VCS-Detection
create_package() {
    local version="$1"
    local package_name="furt-api-gateway-v${version}.tar.gz"

    log_info "Erstelle Paket: $package_name"

    # Erstelle dist/ Verzeichnis falls nicht vorhanden
    mkdir -p dist/

    # VCS-Detection für saubere Archive (wie bei merkwerk)
    if git rev-parse --git-dir >/dev/null 2>&1; then
        log_info "Using git archive..."
        git archive --format=tar.gz --prefix=furt-api-gateway-v${version}/ HEAD > "dist/$package_name"
    elif hg root >/dev/null 2>&1; then
        log_info "Using hg archive..."
        hg archive -t tgz -p furt-api-gateway-v${version}/ "dist/$package_name"
    elif bzr info >/dev/null 2>&1; then
        log_info "Using bzr export..."
        bzr export --format=tgz "dist/$package_name" --root=furt-api-gateway-v${version}/
    elif fossil info >/dev/null 2>&1; then
        log_info "Using fossil tarball..."
        fossil tarball --name furt-api-gateway-v${version} "dist/$package_name" HEAD
    else
        log_info "No VCS detected, using secure tar exclusions..."
        tar -czf "dist/$package_name" \
            --exclude='.git*' --exclude='.hg*' --exclude='.bzr*' --exclude='_FOSSIL_*' \
            --exclude='dist' --exclude='*.tmp' --exclude='*~' \
            --exclude='.env*' --exclude='*secret*' --exclude='*key*' \
            --exclude='*.log' --exclude='*.pid' --exclude='.DS_Store' \
            --exclude='debug.log' --exclude='furt.pid' \
            --transform="s,^,furt-api-gateway-v${version}/," \
            .
    fi

    # VERSION file in Archive aktualisieren falls nötig
    if [[ ! -f "VERSION" ]]; then
        log_warn "VERSION file fehlt - wird im Archiv ergänzt"
        # Temporär entpacken, VERSION hinzufügen, neu packen
        local temp_dir=$(mktemp -d)
        tar -xzf "dist/$package_name" -C "$temp_dir"
        echo "$version" > "$temp_dir/furt-api-gateway-v${version}/VERSION"
        tar -czf "dist/$package_name" -C "$temp_dir" "furt-api-gateway-v${version}"
        rm -rf "$temp_dir"
        log_info "VERSION file im Archiv ergänzt"
    fi

    # Package-Info
    local size=$(du -h "dist/$package_name" | cut -f1)
    log_success "Paket erstellt: dist/$package_name ($size)"

    # Content-Verification
    log_info "Paket-Inhalt:"
    tar -tzf "dist/$package_name" | head -20
    if [[ $(tar -tzf "dist/$package_name" | wc -l) -gt 20 ]]; then
        log_info "  ... und $(( $(tar -tzf "dist/$package_name" | wc -l) - 20 )) weitere Dateien"
    fi
}

# Hilfe anzeigen
show_help() {
    echo "build-package.sh - Furt Package Builder"
    echo ""
    echo "Usage: $0 [VERSION]"
    echo ""
    echo "VERSION:"
    echo "  Explicit version string (e.g., 1.0.0)"
    echo "  If not provided, uses VERSION file or git tags"
    echo ""
    echo "Examples:"
    echo "  $0                    # Auto-detect version"
    echo "  $0 1.0.0             # Explicit version"
    echo "  $0 1.1.0-rc1         # Pre-release"
    echo ""
    echo "Output: dist/furt-api-gateway-vVERSION.tar.gz"
}

# Main
main() {
    if [[ $# -gt 0 ]] && [[ "$1" == "-h" || "$1" == "--help" ]]; then
        show_help
        exit 0
    fi

    log_info "Furt Package Builder"

    validate_project

    local version
    version=$(get_version "$@")
    log_info "Version: $version"

    create_package "$version"

    log_success "Package build abgeschlossen!"
    log_info ""
    log_info "Nächste Schritte:"
    log_info "  1. Upload: ./scripts/upload-package.sh $version"
    log_info "  2. Test: tar -tzf dist/furt-api-gateway-v$version.tar.gz"
}

main "$@"