#!/usr/bin/python3
# Builds zip release files for Moonraker and Klipper

import os
import sys
import argparse
import shutil
import tempfile
import json
import pathlib
import time
import traceback
import subprocess
import re
from typing import Dict, Any, List, Set, Optional

MOONRAKER_PATH = os.path.abspath(
    os.path.join(os.path.dirname(__file__), ".."))
sys.path.append(os.path.join(MOONRAKER_PATH, "moonraker"))
from utils import hash_directory, retrieve_git_version  # noqa:E402

# Dirs and exts to ignore when calculating the repo hash
IGNORE_DIRS = ["out", "lib", "test", "docs", "__pycache__"]
IGNORE_EXTS = [".o", ".so", ".pyc", ".pyo", ".pyd", ".yml", ".yaml"]

# Files not to include in the source package
SKIP_FILES = [".gitignore", ".gitattributes", ".readthedocs.yaml",
              "mkdocs.yml", "__pycache__"]

RELEASE_URL = "https://api.github.com/repos/Arksine/moonraker/releases"
GIT_MAX_LOG_CNT = 100
GIT_LOG_FMT = \
    "sha:%H%x1Dauthor:%an%x1Ddate:%ct%x1Dsubject:%s%x1Dmessage:%b%x1E"
OWNER_REPOS = {
    'moonraker': "arksine/moonraker",
    'klippy': "klipper3d/klipper"
}
INSTALL_SCRIPTS = {
    'klippy': {
        'debian': "install-octopi.sh",
        'arch': "install-arch.sh",
        'centos': "install-centos.sh"
    },
    'moonraker': {
        'debian': "install-moonraker.sh"
    }
}

class CopyIgnore:
    def __init__(self, root_dir: str) -> None:
        self.root_dir = root_dir

    def __call__(self, dir_path: str, dir_items: List[str]) -> List[str]:
        ignored: List[str] = []
        for item in dir_items:
            if item in SKIP_FILES:
                ignored.append(item)
            elif dir_path == self.root_dir:
                full_path = os.path.join(dir_path, item)
                # Ignore all hidden directories in the root
                if os.path.isdir(full_path) and item[0] == ".":
                    ignored.append(item)
        return ignored

def search_install_script(data: str,
                          regex: str,
                          exclude: str
                          ) -> List[str]:
    items: Set[str] = set()
    lines: List[str] = re.findall(regex, data)
    for line in lines:
        items.update(line.strip().split())
    try:
        items.remove(exclude)
    except KeyError:
        pass
    return list(items)

def generate_dependency_info(repo_path: str, app_name: str) -> None:
    inst_scripts = INSTALL_SCRIPTS[app_name]
    package_info: Dict[str, Any] = {}
    for distro, script_name in inst_scripts.items():
        script_path = os.path.join(repo_path, "scripts", script_name)
        script = pathlib.Path(script_path)
        if not script.exists():
            continue
        data = script.read_text()
        packages: List[str] = search_install_script(
            data, r'PKGLIST="(.*)"', "${PKGLIST}")
        package_info[distro] = {'packages': sorted(packages)}
        if distro == "arch":
            aur_packages: List[str] = search_install_script(
                data, r'AURLIST="(.*)"', "${AURLIST}")
            package_info[distro]['aur_packages'] = sorted(aur_packages)
    req_file_name = os.path.join(repo_path, "scripts",
                                 f"{app_name}-requirements.txt")
    req_file = pathlib.Path(req_file_name)
    python_reqs: List[str] = []
    if req_file.exists():
        req_data = req_file.read_text()
        lines = [line.strip() for line in req_data.split('\n')
                 if line.strip()]
        for line in lines:
            comment_idx = line.find('#')
            if comment_idx == 0:
                continue
            if comment_idx > 0:
                line = line[:comment_idx].strip()
            python_reqs.append(line)
    package_info['python'] = sorted(python_reqs)
    dep_file = pathlib.Path(os.path.join(repo_path, ".dependencies"))
    dep_file.write_text(json.dumps(package_info))

def clean_repo(path: str) -> None:
    # Obtain version info from "git" program
    prog = ('git', '-C', path, 'clean', '-x', '-f', '-d')
    process = subprocess.Popen(prog, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, cwd=path)
    retcode = process.wait()
    if retcode != 0:
        print(f"Error running git clean: {path}")

def get_releases() -> List[Dict[str, Any]]:
    print("Fetching Release List...")
    prog = ('curl', '-H', "Accept: application/vnd.github.v3+json",
            RELEASE_URL)
    process = subprocess.Popen(prog, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE)
    response, err = process.communicate()
    retcode = process.wait()
    if retcode != 0:
        print(f"Release list request returned with code {retcode},"
              f" response:\n{err.decode()}")
        return []
    releases = json.loads(response.decode().strip())
    print(f"Found {len(releases)} releases")
    return releases

def get_last_release_info(moonraker_version: str,
                          is_beta: bool,
                          releases: List[Dict[str, Any]]
                          ) -> Dict[str, Any]:
    print("Searching for previous release assets...")
    cur_tag, commit_count = moonraker_version.split('-', 2)[:2]
    release_assets = []
    matched_tag: Optional[str] = None
    for release in releases:
        if int(commit_count) != 0:
            # This is build is not being done against a fresh release,
            # return release info from a matching tag
            if release['tag_name'] == cur_tag:
                release_assets = release['assets']
                matched_tag = cur_tag
                break
        else:
            # Get the most recent non-matching tag
            if release['tag_name'] == cur_tag:
                continue
            if is_beta or not release['prerelease']:
                # Get the last tagged release.  If we are building a beta,
                # that is the most recent release.  Otherwise we should
                # omit pre-releases
                release_assets = release['assets']
                matched_tag = release['tag_name']
                break
    if matched_tag is None:
        print("No matching release found")
        matched_tag = "No Tag"
    else:
        print(f"Found release: {matched_tag}")

    asset_url: Optional[str] = None
    content_type: str = ""
    for asset in release_assets:
        if asset['name'] == "RELEASE_INFO":
            asset_url = asset['browser_download_url']
            content_type = asset['content_type']
            break
    if asset_url is None:
        print(f"RELEASE_INFO asset not found in release: {matched_tag}")
        return {}
        # This build is prior to a tagged release, so fetch the current tag
    print(f"Release Info Download URL: {asset_url}")
    prog = ('curl', '-L', '-H', f"Accept: {content_type}", asset_url)
    process = subprocess.Popen(prog, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE)
    response, err = process.communicate()
    retcode = process.wait()
    if retcode != 0:
        print("Request for release info failed")
        return {}
    resp = response.decode().strip()
    print(f"Found Info for release {matched_tag}")
    return json.loads(resp)

def get_commit_log(path: str,
                   release_info: Dict[str, Any]
                   ) -> List[Dict[str, Any]]:
    print(f"Preparing commit log for {path.split('/')[-1]}")
    start_sha = release_info.get('commit_hash', None)
    prog = ['git', '-C', path, 'log', f'--format={GIT_LOG_FMT}',
            f'--max-count={GIT_MAX_LOG_CNT}']
    if start_sha is not None:
        prog = ['git', '-C', path, 'log', f'{start_sha}..HEAD',
                f'--format={GIT_LOG_FMT}', f'--max-count={GIT_MAX_LOG_CNT}']
    process = subprocess.Popen(prog, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, cwd=path)
    response, err = process.communicate()
    retcode = process.wait()
    if retcode != 0:
        return []
    resp = response.decode().strip()
    commit_log: List[Dict[str, Any]] = []
    for log_entry in resp.split('\x1E'):
        log_entry = log_entry.strip()
        if not log_entry:
            continue
        log_items = [li.strip() for li in log_entry.split('\x1D')
                     if li.strip()]
        cbh = [li.split(':', 1) for li in log_items]
        commit_log.append(dict(cbh))  # type: ignore
    print(f"Found {len(commit_log)} commits")
    return commit_log

def get_commit_hash(path: str) -> str:
    prog = ('git', '-C', path, 'rev-parse', 'HEAD')
    process = subprocess.Popen(prog, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, cwd=path)
    commit_hash, err = process.communicate()
    retcode = process.wait()
    if retcode == 0:
        return commit_hash.strip().decode()
    raise Exception(f"Failed to get commit hash: {commit_hash.decode()}")

def generate_version_info(path: str,
                          source_dir: str,
                          channel: str,
                          release_tag: Optional[str] = None
                          ) -> Dict[str, Any]:
    print(f"Generating version info: {source_dir}")
    clean_repo(path)
    owner_repo = OWNER_REPOS[source_dir]
    curtime = int(time.time())
    date_str = time.strftime("%Y%m%d", time.gmtime(curtime))
    version = retrieve_git_version(path)
    if release_tag is None:
        release_tag = version.split('-')[0]
    source_hash = hash_directory(path, IGNORE_EXTS, IGNORE_DIRS)
    long_version = f"{version}-moonraker-{date_str}"
    release_info = {
        'git_version': version,
        'long_version': long_version,
        'commit_hash': get_commit_hash(path),
        'source_checksum': source_hash,
        'ignored_exts': IGNORE_EXTS,
        'ignored_dirs': IGNORE_DIRS,
        'build_date': curtime,
        'channel': channel,
        'owner_repo': owner_repo,
        'host_repo': OWNER_REPOS['moonraker'],
        'release_tag': release_tag
    }
    vfile = pathlib.Path(os.path.join(path, source_dir, ".version"))
    vfile.write_text(long_version)
    rfile = pathlib.Path(os.path.join(path, ".release_info"))
    rfile.write_text(json.dumps(release_info))
    generate_dependency_info(path, source_dir)
    return release_info

def create_zip(repo_path: str,
               repo_name: str,
               output_path: str
               ) -> None:
    print(f"Creating Zip Release: {repo_name}")
    zip_path = os.path.join(output_path, repo_name)
    with tempfile.TemporaryDirectory() as tmp_dir:
        dest_path = os.path.join(tmp_dir, repo_name)
        ingore_cb = CopyIgnore(repo_path)
        shutil.copytree(repo_path, dest_path, ignore=ingore_cb)
        shutil.make_archive(zip_path, "zip", root_dir=dest_path)

def main() -> None:
    # Parse start arguments
    parser = argparse.ArgumentParser(
        description="Generates zip releases for Moonraker and Klipper")
    parser.add_argument(
        "-k", "--klipper", default="~/klipper",
        metavar='<klipper_path>',
        help="Path to Klipper git repo")
    parser.add_argument(
        "-o", "--output", default=os.path.join(MOONRAKER_PATH, ".dist"),
        metavar='<output_path>', help="Path to output directory")
    parser.add_argument(
        "-b", "--beta", action='store_true',
        help="Tag release as beta")
    args = parser.parse_args()
    kpath: str = os.path.abspath(os.path.expanduser(args.klipper))
    opath: str = os.path.abspath(os.path.expanduser(args.output))
    is_beta: bool = args.beta
    channel = "beta" if is_beta else "stable"
    if not os.path.exists(kpath):
        print(f"Invalid path to Klipper: {kpath}")
        sys.exit(-1)
    if not os.path.exists(opath):
        print(f"Invalid output path: {opath}")
        sys.exit(-1)
    releases = get_releases()
    all_info: Dict[str, Dict[str, Any]] = {}
    try:
        print("Generating Moonraker Zip Distribution...")
        all_info['moonraker'] = generate_version_info(
            MOONRAKER_PATH, "moonraker", channel)
        create_zip(MOONRAKER_PATH, 'moonraker', opath)
        rtag: str = all_info['moonraker']['release_tag']
        print("Generating Klipper Zip Distribution...")
        all_info['klipper'] = generate_version_info(
            kpath, "klippy", channel, rtag)
        create_zip(kpath, 'klipper', opath)
        info_file = pathlib.Path(os.path.join(opath, "RELEASE_INFO"))
        info_file.write_text(json.dumps(all_info))
        last_rinfo = get_last_release_info(
            all_info['moonraker']['git_version'], is_beta, releases)
        commit_log = {}
        commit_log['moonraker'] = get_commit_log(
            MOONRAKER_PATH, last_rinfo.get('moonraker', {}))
        commit_log['klipper'] = get_commit_log(
            kpath, last_rinfo.get('klipper', {}))
        clog_file = pathlib.Path(os.path.join(opath, "COMMIT_LOG"))
        clog_file.write_text(json.dumps(commit_log))
    except Exception:
        print("Error Creating Zip Distribution")
        traceback.print_exc(file=sys.stdout)
        sys.exit(-1)
    print(f"Build Complete.  Files are located at '{opath}'")


if __name__ == "__main__":
    main()