#!/bin/bash

# NOSTR Core Library Build Script
# Provides convenient build targets for the standalone library
# Automatically increments patch version with each build

set -e  # Exit on any error

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Function to print colored output
print_status() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

print_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

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

# Function to automatically increment version
increment_version() {
    print_status "Incrementing version..."
    
    # Check if we're in a git repository
    if ! git rev-parse --git-dir > /dev/null 2>&1; then
        print_warning "Not in a git repository - skipping version increment"
        return 0
    fi
    
    # Get the highest version tag (not necessarily the most recent chronologically)
    LATEST_TAG=$(git tag -l 'v*.*.*' | sort -V | tail -n 1 || echo "v0.1.0")
    if [[ -z "$LATEST_TAG" ]]; then
        LATEST_TAG="v0.1.0"
    fi
    
    # Extract version components (remove 'v' prefix if present)
    VERSION=${LATEST_TAG#v}
    
    # Parse major.minor.patch
    if [[ $VERSION =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
        MAJOR=${BASH_REMATCH[1]}
        MINOR=${BASH_REMATCH[2]}
        PATCH=${BASH_REMATCH[3]}
    else
        print_error "Invalid version format in tag: $LATEST_TAG"
        print_error "Expected format: v0.1.0"
        return 1
    fi
    
    # Increment patch version
    NEW_PATCH=$((PATCH + 1))
    NEW_VERSION="v${MAJOR}.${MINOR}.${NEW_PATCH}"
    
    print_status "Current version: $LATEST_TAG"
    print_status "New version: $NEW_VERSION"
    
    # Create new git tag
    if git tag "$NEW_VERSION" 2>/dev/null; then
        print_success "Created new version tag: $NEW_VERSION"
        
        # Generate version.h header file
        cat > nostr_core/version.h << EOF
/*
 * NOSTR Core Library - Auto-Generated Version Header
 * DO NOT EDIT THIS FILE MANUALLY - Generated by build.sh
 */

#ifndef NOSTR_VERSION_H
#define NOSTR_VERSION_H

#define VERSION_MAJOR ${MAJOR}
#define VERSION_MINOR ${MINOR}
#define VERSION_PATCH ${NEW_PATCH}
#define VERSION_STRING "${MAJOR}.${MINOR}.${NEW_PATCH}"
#define VERSION_TAG "${NEW_VERSION}"

/* Build information */
#define BUILD_DATE "$(date +%Y-%m-%d)"
#define BUILD_TIME "$(date +%H:%M:%S)"
#define BUILD_TIMESTAMP "$(date '+%Y-%m-%d %H:%M:%S')"

/* Git information */
#define GIT_HASH "$(git rev-parse --short HEAD 2>/dev/null || echo 'unknown')"
#define GIT_BRANCH "$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo 'unknown')"

/* Display versions */
#define VERSION_DISPLAY "${NEW_VERSION}"
#define VERSION_FULL_DISPLAY "${NEW_VERSION} ($(date '+%Y-%m-%d %H:%M:%S'), $(git rev-parse --short HEAD 2>/dev/null || echo 'unknown'))"

/* Version API functions */
const char* nostr_core_get_version(void);
const char* nostr_core_get_version_full(void);
const char* nostr_core_get_build_info(void);

#endif /* NOSTR_VERSION_H */
EOF

        # Generate version.c implementation file
        cat > nostr_core/version.c << EOF
/*
 * NOSTR Core Library - Auto-Generated Version Implementation
 * DO NOT EDIT THIS FILE MANUALLY - Generated by build.sh
 */

#include "version.h"

const char* nostr_core_get_version(void) {
    return VERSION_TAG;
}

const char* nostr_core_get_version_full(void) {
    return VERSION_FULL_DISPLAY;
}

const char* nostr_core_get_build_info(void) {
    return "Built on " BUILD_DATE " at " BUILD_TIME " from commit " GIT_HASH " on branch " GIT_BRANCH;
}
EOF
        
        print_success "Generated version.h and version.c"
    else
        print_warning "Tag $NEW_VERSION already exists - using existing version"
        NEW_VERSION=$LATEST_TAG
    fi
    
    # Update VERSION file for compatibility
    echo "${NEW_VERSION#v}" > VERSION
    print_success "Updated VERSION file to ${NEW_VERSION#v}"
}

# Function to show usage
show_usage() {
    echo "NOSTR Core Library Build Script"
    echo "==============================="
    echo ""
    echo "Usage: $0 [target] [architecture]"
    echo ""
    echo "Available targets:"
    echo "  clean       - Clean all build artifacts"
    echo "  lib         - Build static libraries for both x64 and ARM64 (default)"
    echo "  x64         - Build x64 static library only"
    echo "  arm64       - Build ARM64 static library only"
    echo "  all         - Build both architectures and examples"
    echo "  examples    - Build example programs"
    echo "  test        - Run tests"
    echo "  install     - Install library to system"
    echo "  uninstall   - Remove library from system"
    echo "  help        - Show this help message"
    echo ""
    echo "Library outputs (both self-contained with secp256k1):"
    echo "  libnostr_core.a       - x86_64 static library"
    echo "  libnostr_core_arm64.a - ARM64 static library"
    echo "  examples/*            - Example programs"
    echo ""
    echo "Both libraries include secp256k1 objects internally."
    echo "Users only need to link with the library + -lm."
}

# Parse command line arguments
TARGET=${1:-lib}

case "$TARGET" in
    clean)
        print_status "Cleaning build artifacts..."
        make clean
        print_success "Clean completed"
        ;;
        
    lib|library)
        increment_version
        print_status "Building both x64 and ARM64 static libraries..."
        make clean
        make
        
        # Check both libraries were built
        SUCCESS=0
        if [ -f "libnostr_core.a" ]; then
            SIZE_X64=$(stat -c%s "libnostr_core.a")
            print_success "x64 static library built successfully (${SIZE_X64} bytes)"
            SUCCESS=$((SUCCESS + 1))
        else
            print_error "Failed to build x64 static library"
        fi
        
        if [ -f "libnostr_core_arm64.a" ]; then
            SIZE_ARM64=$(stat -c%s "libnostr_core_arm64.a")
            print_success "ARM64 static library built successfully (${SIZE_ARM64} bytes)"
            SUCCESS=$((SUCCESS + 1))
        else
            print_error "Failed to build ARM64 static library"
        fi
        
        if [ $SUCCESS -eq 2 ]; then
            print_success "Both architectures built successfully!"
            ls -la libnostr_core*.a
        else
            print_error "Failed to build all libraries"
            exit 1
        fi
        ;;
        
    x64|x64-only)
        increment_version
        print_status "Building x64 static library only..."
        make clean
        make x64
        if [ -f "libnostr_core.a" ]; then
            SIZE=$(stat -c%s "libnostr_core.a")
            print_success "x64 static library built successfully (${SIZE} bytes)"
            ls -la libnostr_core.a
        else
            print_error "Failed to build x64 static library"
            exit 1
        fi
        ;;
        
    arm64|arm64-only)
        increment_version
        print_status "Building ARM64 static library only..."
        make clean
        make arm64
        if [ -f "libnostr_core_arm64.a" ]; then
            SIZE=$(stat -c%s "libnostr_core_arm64.a")
            print_success "ARM64 static library built successfully (${SIZE} bytes)"
            ls -la libnostr_core_arm64.a
        else
            print_error "Failed to build ARM64 static library"
            exit 1
        fi
        ;;
        
    shared)
        increment_version
        print_status "Building shared library..."
        make clean
        make libnostr_core.so
        if [ -f "libnostr_core.so" ]; then
            SIZE=$(stat -c%s "libnostr_core.so")
            print_success "Shared library built successfully (${SIZE} bytes)"
            ls -la libnostr_core.so
        else
            print_error "Failed to build shared library"
            exit 1
        fi
        ;;
        
    all)
        increment_version
        print_status "Building all libraries and examples..."
        make clean
        make all
        
        # Check both libraries and examples were built
        SUCCESS=0
        if [ -f "libnostr_core.a" ]; then
            SIZE_X64=$(stat -c%s "libnostr_core.a")
            print_success "x64 static library built successfully (${SIZE_X64} bytes)"
            SUCCESS=$((SUCCESS + 1))
        else
            print_error "Failed to build x64 static library"
        fi
        
        if [ -f "libnostr_core_arm64.a" ]; then
            SIZE_ARM64=$(stat -c%s "libnostr_core_arm64.a")
            print_success "ARM64 static library built successfully (${SIZE_ARM64} bytes)"
            SUCCESS=$((SUCCESS + 1))
        else
            print_error "Failed to build ARM64 static library"
        fi
        
        if [ $SUCCESS -eq 2 ]; then
            print_success "All libraries and examples built successfully!"
            ls -la libnostr_core*.a
            ls -la examples/
        else
            print_error "Failed to build all components"
            exit 1
        fi
        ;;
        
    examples)
        increment_version
        print_status "Building both libraries and examples..."
        make clean
        make
        make examples
        
        # Verify libraries were built
        if [ -f "libnostr_core.a" ] && [ -f "libnostr_core_arm64.a" ]; then
            print_success "Both libraries and examples built successfully"
            ls -la libnostr_core*.a
            ls -la examples/
        else
            print_error "Failed to build libraries for examples"
            exit 1
        fi
        ;;
        
    test)
        print_status "Running tests..."
        make clean
        make
        if make test-crypto 2>/dev/null; then
            print_success "All tests passed"
        else
            print_warning "Running simple test instead..."
            make test
            print_success "Basic test completed"
        fi
        ;;
        
    tests)
        print_status "Running tests..."
        make clean
        make
        if make test-crypto 2>/dev/null; then
            print_success "All tests passed"
        else
            print_warning "Running simple test instead..."
            make test
            print_success "Basic test completed"
        fi
        ;;

    install)
        increment_version
        print_status "Installing library to system..."
        make clean
        make all
        sudo make install
        print_success "Library installed to /usr/local"
        ;;
        
    uninstall)
        print_status "Uninstalling library from system..."
        sudo make uninstall
        print_success "Library uninstalled"
        ;;
        
    help|--help|-h)
        show_usage
        ;;
        
    *)
        print_error "Unknown target: $TARGET"
        echo ""
        show_usage
        exit 1
        ;;
esac