import json
import subprocess
import tarfile
import os
import tempfile
import sys
from datetime import datetime, UTC

def read_properties_file(path):
    properties = {}
    with open(path, "r") as file:
        for line in file:
            stripped = line.strip()
            if not stripped or stripped.startswith("#"):
                continue
            key, sep, value = line.partition("=")
            if not sep:
                continue
            properties[key.strip()] = value.strip()
    return properties

def get_manifest(appPath):
    """Extract only the file named 'manifest.properties' from the given tar/tar.gz
    archive into the directory specified by outputPath.

    Returns True on success, False on failure.
    """
    print(f"Unpacking manifest.properties from {appPath}")
    if not os.path.isfile(appPath):
        print(f"File not found: {appPath}")
        return False

    try:
        # Auto-detect compression (tar, tar.gz, tar.bz2, etc.)
        with tarfile.open(appPath, mode="r:*") as tf:
            # Find a member whose base name is exactly 'manifest.properties'
            member = None
            for m in tf.getmembers():
                # Skip directories and non-files
                if not m.isfile():
                    continue
                if os.path.basename(m.name) == "manifest.properties":
                    member = m
                    break

            if member is None:
                print("manifest.properties not found in archive")
                return None

            # Read the member's content and write it directly into outputPath
            # Create a temporary directory that persists after this function returns.
            temp_dir = tempfile.mkdtemp(prefix="tactility_app_")
            dest_file = os.path.join(temp_dir, "manifest.properties")
            with tf.extractfile(member) as src, open(dest_file, "wb") as dst:
                if src is None:
                    print("Failed to open manifest.properties from the archive")
                    return False
                while True:
                    chunk = src.read(1024 * 1024)
                    if not chunk:
                        break
                    dst.write(chunk)
            properties = read_properties_file(dest_file)
            os.remove(dest_file)
            os.rmdir(temp_dir)
            return properties
    except tarfile.ReadError as e:
        print(f"Not a valid tar archive: {appPath} ({e})")
    except Exception as e:
        print(f"Failed to extract manifest.properties from {appPath}: {e}")
    return None

def get_versioned_file_name(manifest):
    app_id = manifest["app.id"]
    version_code = manifest["app.version.code"]
    return f"{app_id}-{version_code}.app"

def get_os_version(manifest):
    sdk = manifest["target.sdk"]
    # Remove trailing hyphen suffix if present
    if "-" in sdk:
        return sdk.rsplit("-", 1)[0].strip()
    else:
        return sdk

def check_and_get_sdk_version(manifest_map):
    """Ensure all apps target the same (simplified) SDK version and return it."""
    versions = {get_os_version(manifest) for manifest in manifest_map.values()}
    if len(versions) != 1:
        print(f"ERROR: Apps target multiple SDK versions: {sorted(versions)}. All apps must target the same SDK version.")
        sys.exit(1)
    return next(iter(versions))

def get_git_commit_hash():
    return subprocess.check_output(['git', 'rev-parse', 'HEAD']).decode('ascii').strip()

def manifest_config_to_flat_json(manifest):
    """Convert a flat (V2) manifest dict into a flat JSON-like dict.

    Expected keys:
        app.id -> appId
        app.version.name -> appVersionName
        app.version.code -> appVersionCode (int)
        app.name -> appName
        app.description -> appDescription (optional; default "")
        target.sdk -> targetSdk
        target.platforms -> targetPlatforms (comma-separated list)

    Unknown/missing values fall back to sensible defaults per requirements.
    """
    # Map values
    app_id = manifest.get("app.id", "")
    app_version_name = manifest.get("app.version.name", "")
    app_version_code_raw = manifest.get("app.version.code", "0")
    app_name = manifest.get("app.name", "")
    app_description = manifest.get("app.description", "") or ""

    # Coerce version code to int safely
    try:
        app_version_code = int(str(app_version_code_raw).strip())
    except Exception:
        app_version_code = 0

    target_sdk = manifest.get("target.sdk", "")
    platforms_raw = manifest.get("target.platforms", "")
    target_platforms = [p.strip() for p in str(platforms_raw).split(",") if p.strip()] if platforms_raw is not None else []

    filename = get_versioned_file_name(manifest)
    return {
        "appId": app_id,
        "appVersionName": app_version_name,
        "appVersionCode": app_version_code,
        "appName": app_name,
        "appDescription": app_description,
        "targetSdk": target_sdk,
        "targetPlatforms": target_platforms,
        "file": filename
    }

def write_json(filepath, data):
    text = json.dumps(data)
    with open(filepath, 'w') as f:
        f.write(text)

if __name__ == "__main__":
    print("Tactility app release script")
    if len(sys.argv) != 2:
        print("Missing argument")
        sys.exit()
    app_directory = sys.argv[1]
    manifest_map = {}
    any_manifest = None
    if os.path.exists(app_directory):
        for file in os.listdir(app_directory):
            if file.endswith(".app"):
                file_path = os.path.join(app_directory, file)
                manifest_map[file_path] = get_manifest(file_path)
    # All bundled apps must target the same SDK version; this becomes the CDN path segment
    sdk_version = check_and_get_sdk_version(manifest_map)
    with open("sdk_version.txt", "w") as f:
        f.write(sdk_version)
    print(f"SDK version: {sdk_version}")
    output_json = {
        "sdkVersion": sdk_version,
        "created": datetime.now(UTC).strftime('%Y-%m-%dT%H:%M:%SZ'),
        "gitCommit": get_git_commit_hash(),
        "apps": []
    }
    # Rename files and collect manifest data into output json object
    for file_path in manifest_map.keys():
        print(f"Processing {file_path}: {manifest_map[file_path]}")
        manifest = manifest_map[file_path]
        manifest_json = manifest_config_to_flat_json(manifest)
        output_json["apps"].append(manifest_json)
        release_file_name = get_versioned_file_name(manifest)
        renamed_file_path = os.path.join(app_directory, release_file_name)
        os.rename(file_path, renamed_file_path)
        print(f"Renamed {file_path} to {renamed_file_path}")
        any_manifest = manifest
    # Write JSON
    output_json_path = os.path.join(app_directory, "apps.json")
    write_json(output_json_path, output_json)