# 
# Copyright (c) 2018 Microsoft Corporation
#
# 1. copy over dlls
# 2. copy over libz3.dll for the different architectures
# 3. copy over Microsoft.Z3.dll from suitable distribution
# 4. copy nuspec file from packages
# 5. call nuget pack
# 6. sign package

import json
import os
import zipfile
import sys
import os.path
import shutil
import subprocess
import re

def mk_dir(d):
    if not os.path.exists(d):
        os.makedirs(d)

os_info = {  'x64-ubuntu-latest' : ('so', 'linux-x64'),
             'x64-ubuntu-18' : ('so', 'linux-x64'),
             'x64-ubuntu-20' : ('so', 'linux-x64'),
             'x64-ubuntu-22' : ('so', 'linux-x64'),
             'x64-glibc-2.35' : ('so', 'linux-x64'),
             'x64-win' : ('dll', 'win-x64'),
             'x86-win' : ('dll', 'win-x86'),
             'arm64-win' : ('dll', 'win-arm64'),
             'x64-osx' : ('dylib', 'osx-x64'),
             'arm64-glibc' : ('so', 'linux-arm64'),
             'arm64-osx' : ('dylib', 'osx-arm64'),
             'debian' : ('so', 'linux-x64') }

# Pattern-based mappings for more flexible matching
# These patterns handle version numbers and other variable parts
os_patterns = [
    (re.compile(r'x64-glibc-\d+(?:\.\d+)*'), 'so', 'linux-x64'),      # Matches x64-glibc-2.35, x64-glibc-2.39, etc.
    (re.compile(r'arm64-glibc-\d+(?:\.\d+)*'), 'so', 'linux-arm64'),  # Matches arm64-glibc-* with version
]

        

def classify_package(f, arch):
    # First try exact matches from the dictionary
    for os_name in os_info:
        if os_name in f:
            ext, dst = os_info[os_name]
            return os_name, f[:-4], ext, dst
    
    # Then try pattern-based matching for more flexible version handling
    for pattern, ext, dst in os_patterns:
        match = pattern.search(f)
        if match:
            matched_os_name = match.group(0)
            return matched_os_name, f[:-4], ext, dst
    
    print("Could not classify", f)
    return None

def replace(src, dst):
    """
    Replace destination file with source file.
    
    Removes the destination file if it exists, then moves the source file to the destination.
    This ensures that the file is always moved, whether or not the destination exists.
    
    Previous buggy implementation only moved when removal failed, causing files to be 
    deleted but not replaced when the destination already existed.
    """
    try:
        os.remove(dst)
    except:
        pass
    shutil.move(src, dst)
    
def unpack(packages, symbols, arch):
    # unzip files in packages
    # out
    # +- runtimes
    #    +- win-x64
    #    +- win-x86
    #    +- linux-x64
    #    +- osx-x64
    # +
    tmp = "tmp" if not symbols else "tmpsym"
    for f in os.listdir(packages):
        print(f)
        if f.endswith(".zip") and classify_package(f, arch):
            os_name, package_dir, ext, dst = classify_package(f, arch)
            path = os.path.abspath(os.path.join(packages, f))
            zip_ref = zipfile.ZipFile(path, 'r')
            zip_ref.extract(f"{package_dir}/bin/libz3.{ext}", f"{tmp}")
            mk_dir(f"out/runtimes/{dst}/native")
            replace(f"{tmp}/{package_dir}/bin/libz3.{ext}", f"out/runtimes/{dst}/native/libz3.{ext}")            
            if "x64-win" in f or "x86-win" in f or "arm64-win" in f:
                mk_dir("out/lib/netstandard2.0/")
                if symbols:
                    zip_ref.extract(f"{package_dir}/bin/libz3.pdb", f"{tmp}")
                    replace(f"{tmp}/{package_dir}/bin/libz3.pdb", f"out/runtimes/{dst}/native/libz3.pdb") 
                files = ["Microsoft.Z3.dll", "Microsoft.Z3.pdb", "Microsoft.Z3.xml"]                
                for b in files:
                    file1 = f"{package_dir}/bin/{b}"
                    file2 = f"{package_dir}/bin/netstandard2.0/{b}"
                    found_path = False
                    # check that file1 exists in zip_ref:
                    try:
                        zip_ref.extract(file1, f"{tmp}")
                        replace(f"{tmp}/{file1}", f"out/lib/netstandard2.0/{b}")
                        found_path = True
                    except:
                        pass
                    try:
                        zip_ref.extract(file2, f"{tmp}")
                        replace(f"{tmp}/{file2}", f"out/lib/netstandard2.0/{b}")
                        found_path = True
                    except:
                        pass
                    if not found_path:
                        print(f"Could not find file path {file1} nor {file2}")


def mk_targets(source_root):
    mk_dir("out/build")
    shutil.copy(f"{source_root}/src/api/dotnet/Microsoft.Z3.targets.in", "out/build/Microsoft.Z3.targets")

def mk_icon(source_root):
    mk_dir("out/content")
    shutil.copy(f"{source_root}/resources/icon.jpg", "out/content/icon.jpg")
    shutil.copy(f"{source_root}/src/api/dotnet/README.md", "out/content/README.md")


    
def create_nuget_spec(version, repo, branch, commit, symbols, arch):
    arch = f".{arch}" if arch == "x86" else ""
    contents = """<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
    <metadata>
        <id>Microsoft.Z3{4}</id>
        <version>{0}</version>
        <authors>Microsoft</authors>
        <description>
Z3 is a satisfiability modulo theories solver from Microsoft Research.

Linux Dependencies:
    libgomp.so.1 installed    
        </description>
        <copyright>&#169; Microsoft Corporation. All rights reserved.</copyright>
        <tags>smt constraint solver theorem prover</tags>
        <icon>content/icon.jpg</icon>
        <readme>content/README.md</readme>
        <projectUrl>https://github.com/Z3Prover/z3</projectUrl>
        <license type="expression">MIT</license>
        <repository type="git" url="{1}" branch="{2}" commit="{3}" />
        <requireLicenseAcceptance>true</requireLicenseAcceptance>
        <language>en</language>
        <dependencies>
            <group targetFramework=".netstandard2.0" />
        </dependencies>
    </metadata>
</package>""".format(version, repo, branch, commit, arch)
    print(contents)
    sym = "sym." if symbols else ""
    file = f"out/Microsoft.Z3{arch}.{sym}nuspec"
    print(file)
    with open(file, 'w') as f:
        f.write(contents)

class Env:
    def __init__(self, argv):
        self.packages = argv[1]
        self.version = argv[2]
        self.repo = argv[3]
        self.branch = argv[4]
        self.commit = argv[5]
        self.source_root = argv[6]
        self.symbols = False
        self.arch = "x64"
        if len(argv) > 7 and "symbols" == argv[7]:
            self.symbols = True
        if len(argv) > 8:
            self.arch = argv[8]

    def create(self):
        mk_dir(self.packages)
        unpack(self.packages, self.symbols, self.arch)
        mk_targets(self.source_root)
        mk_icon(self.source_root)
        create_nuget_spec(self.version, self.repo, self.branch, self.commit, self.symbols, self.arch)
        
def main():
    env = Env(sys.argv)
    print(env.packages)
    env.create()

main()