#!/usr/bin/python3

import argparse

import subprocess

import json

import os

import sys

import tempfile

def get_subprocess_stdout(*args, **kwargs):

    sp = subprocess.run(*args, **kwargs, stdout=subprocess.PIPE)

    if sp.returncode != 0:

        sys.stderr.write(sp.stdout)

        sys.exit(1)

    return sp.stdout

def run_osbuild(manifest, store, output):

    with tempfile.TemporaryFile(dir="/tmp", prefix="osbuild-test-case-generator-", suffix=".log") as log:

        try:

            subprocess.run(["osbuild",

                            "--store", store,

                            "--output-directory", output,

                            "-"],

                            stdout=log,

                            stderr=subprocess.STDOUT,

                            check=True,

                            encoding="utf-8",

                            input=json.dumps(manifest))

        except:

            log.seek(0)

            print(log.read())

            raise

class TestCaseGenerator:

    '''

    This class generates a json test case. It accepts a test_case_request as input to the constructor:

    {

        "boot": {

            "type": "qemu"

        },

        "compose-request": {

            "distro": "fedora-30",

            "arch": "x86_64",

            "image-type": "qcow2",

            "filename": "disk.qcow2",

            "blueprint": {}

        }

    }

    It then outputs a json test case from the get_test_case() method.

    '''

    def __init__(self, test_case_request):

        self.test_case = test_case_request

    def get_test_case(self, no_image_info, store):

        compose_request = json.dumps(self.test_case["compose-request"])

        pipeline_command = ["go", "run", "./cmd/osbuild-pipeline", "-"]

        self.test_case["manifest"] = json.loads(get_subprocess_stdout(pipeline_command, input=compose_request, encoding="utf-8"))

        pipeline_command = ["go", "run", "./cmd/osbuild-pipeline", "-rpmmd", "-"]

        self.test_case["rpmmd"] = json.loads(get_subprocess_stdout(pipeline_command, input=compose_request, encoding="utf-8"))

        if no_image_info == False:

            with tempfile.TemporaryDirectory(dir=store, prefix="test-case-output-") as output:

                run_osbuild(self.test_case["manifest"], store, output)

                image_file = os.path.join(output, self.test_case["compose-request"]["filename"])

                image_info = get_subprocess_stdout(["tools/image-info", image_file], encoding="utf-8")

                self.test_case["image-info"] = json.loads(image_info)

        return self.test_case

def generate_test_case(test_type, distro, arch, output_format, test_case_request, keep_image_info, store, output):

    print(f"generating test case for {output_format}")

    generator = TestCaseGenerator(test_case_request)

    test_case = generator.get_test_case(keep_image_info, store)

    name = distro.replace("-", "_") + "-" + arch + "-" + output_format.replace("-", "_") + "-" + test_type + ".json"

    file_name = output + "/" + name

    if keep_image_info:

        try:

            with open(file_name, 'r') as case_file:

                old_test_case = json.load(case_file)

                image_info = old_test_case.get("image-info")

                if image_info:

                    test_case["image-info"] = image_info

        except:

            pass

    with open(file_name, 'w') as case_file:

        json.dump(test_case, case_file, indent=2)

CUSTOMIZATIONS_BLUEPRINT =  {

    "packages": [

        {

            "name": "bash",

            "version": "*"

        }

    ],

    "groups": [

        {

            "name": "core"

        }

    ],

    "customizations": {

        "hostname": "my-host",

        "kernel": {

            "append": "debug"

        },

        "sshkey": [

            {

                "user": "user1",

                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC61wMCjOSHwbVb4VfVyl5sn497qW4PsdQ7Ty7aD6wDNZ/QjjULkDV/yW5WjDlDQ7UqFH0Sr7vywjqDizUAqK7zM5FsUKsUXWHWwg/ehKg8j9xKcMv11AkFoUoujtfAujnKODkk58XSA9whPr7qcw3vPrmog680pnMSzf9LC7J6kXfs6lkoKfBh9VnlxusCrw2yg0qI1fHAZBLPx7mW6+me71QZsS6sVz8v8KXyrXsKTdnF50FjzHcK9HXDBtSJS5wA3fkcRYymJe0o6WMWNdgSRVpoSiWaHHmFgdMUJaYoCfhXzyl7LtNb3Q+Sveg+tJK7JaRXBLMUllOlJ6ll5Hod root@localhost"

            }

        ],

        "user": [

            {

                "name": "user2",

                "description": "description 2",

                "password": "$6$BhyxFBgrEFh0VrPJ$MllG8auiU26x2pmzL4.1maHzPHrA.4gTdCvlATFp8HJU9UPee4zCS9BVl2HOzKaUYD/zEm8r/OF05F2icWB0K/",

                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC61wMCjOSHwbVb4VfVyl5sn497qW4PsdQ7Ty7aD6wDNZ/QjjULkDV/yW5WjDlDQ7UqFH0Sr7vywjqDizUAqK7zM5FsUKsUXWHWwg/ehKg8j9xKcMv11AkFoUoujtfAujnKODkk58XSA9whPr7qcw3vPrmog680pnMSzf9LC7J6kXfs6lkoKfBh9VnlxusCrw2yg0qI1fHAZBLPx7mW6+me71QZsS6sVz8v8KXyrXsKTdnF50FjzHcK9HXDBtSJS5wA3fkcRYymJe0o6WMWNdgSRVpoSiWaHHmFgdMUJaYoCfhXzyl7LtNb3Q+Sveg+tJK7JaRXBLMUllOlJ6ll5Hod root@localhost",

                "home": "/home/home2",

                "shell": "/bin/sh",

                "groups": [

                    "group1"

                ],

                "uid": 1020,

                "gid": 1050,

            }

        ],

        "group": [

            {

                "name": "group1",

                "gid": 1030

            },

            {

                "name": "group2",

                "gid": 1050

            }

        ],

        "timezone": {

            "timezone": "Europe/London",

            "ntpservers": [

                "time.example.com"

            ]

        },

        "locale": {

            "languages": [

                "en_US"

            ],

            "keyboard": "dvorak"

        },

#       "firewall": {

#           "ports": [

#               "25:tcp"

#           ],

#           "services": {

#               "enabled": [

#                   "cockpit"

#               ],

#               "disabled": [

#                   "ssh"

#               ]

#           }

#       },

        "services": {

            "enabled": [

                "sshd.socket"

            ],

            "disabled": [

                "bluetooth.service"

            ]

        }

    }

}

def main(distro, arch, image_types, keep_image_info, store, output, with_customizations):

    with open("tools/test-case-generators/format-request-map.json") as format_request_json:

        format_request_dict = json.load(format_request_json)

    with open("tools/test-case-generators/repos.json") as repos_json:

        repos_dict = json.load(repos_json)

    # Apply all customizations from the CUSTOMIZATIONS_BLUEPRINT dictionary

    if with_customizations:

        if len(image_types) > 1 or image_types[0] != "qcow2":

            print("Customizations are only available for qcow2 image type")

            sys.exit(1)

        test_case_request = {

            "compose-request": {

                "distro": distro,

                "arch": arch,

                "repositories": repos_dict[distro][arch],

                "image-type": "qcow2",

                "filename": "disk.qcow2",

                "blueprint": CUSTOMIZATIONS_BLUEPRINT,

            }

        }

        generate_test_case("customize", distro, arch, "qcow2", test_case_request, keep_image_info, store, output)

        return

    for output_format, test_case_request in format_request_dict.items():

        filtered_request = dict(filter(lambda i: i[0] != "overrides", test_case_request.items()))

        if filtered_request["compose-request"]["image-type"] not in image_types:

                continue

        filtered_request["compose-request"]["distro"] = distro

        filtered_request["compose-request"]["arch"] = arch

        filtered_request["compose-request"]["repositories"] = repos_dict[distro][arch]

        if distro in test_case_request["overrides"]:

            filtered_request["compose-request"].update(test_case_request["overrides"][distro])

        generate_test_case("boot", distro, arch, output_format, filtered_request, keep_image_info, store, output)

    return

if __name__ == '__main__':

    parser = argparse.ArgumentParser(description="Generate test cases")

    parser.add_argument("--distro", help="distribution for test cases", required=True)

    parser.add_argument("--arch", help="architecture for test cases", required=True)

    parser.add_argument("--image-types", help="image types for test cases", required=True, nargs='+')

    parser.add_argument("--keep-image-info", action='store_true', help="skip image info (re)generation, but keep the one found in the existing test case")

    parser.add_argument("--store", metavar="STORE_DIRECTORY", type=os.path.abspath, help="path to the osbuild store", required=True)

    parser.add_argument("--output", metavar="OUTPUT_DIRECTORY", type=os.path.abspath, help="path to the output directory", required=True)

    parser.add_argument("--with-customizations", action='store_true', help="apply all currently supported customizations to the image (qcow2 only)")

    args = parser.parse_args()

    main(args.distro, args.arch, args.image_types, args.keep_image_info, args.store, args.output, args.with_customizations)

    sys.exit()