# This is a sample Python script.

# Press <no shortcut> to execute it or replace it with your code.
# Press Double ⇧ to search everywhere for classes, files, tool windows, actions, and settings.

import os
import re
import requests
from flask import Flask

app = Flask(__name__)

epmet_root_services = ['epmet-auth', 'epmet-gateway']
epmet_root_svc_name_reg = "^([^/]+)/.*$"
epmet_module_svc_name_reg = "^epmet-module/([^/]+)/.*$"
commit_regex = "^([0-9a-z]{40}) .*$"

# 项目绝对路径
git_project_env = os.environ.get('JWHT_GIT_PROJECT_DIR')
git_project_dir = git_project_env if git_project_env else "epmet-saas"

# 上一次提交记录文件
last_deploy_commit_record = os.environ.get('JWHT_LAST_DEPLOY_COMMIT_RECORD')
commit_record_file_path = last_deploy_commit_record if last_deploy_commit_record else "./lastcommit.txt"

max_commit_qty = 20


def findLatestCommits(commits: list, last_commit_ver: str, max_amount: int):
    """
    过滤出肯能需要发布服务的提交列表
    :param commits:
    :param last_commit_ver:
    :param max_amount:
    :return:
    """
    rst: list = []
    idx: int = 0
    for c in commits:
        if idx > max_amount:
            return rst

        commit_ver = c.split(" ")[0]
        if commit_ver != last_commit_ver:
            rst.append(commit_ver)
            idx += 1
        if commit_ver == last_commit_ver:
            return rst
    return rst


def findModuleList(commits: str):
    """
    根据提交列表，找出所有需要发布的服务模块
    :param commits:
    :return:
    """
    service_set: set = set()
    for c in commits:
        try:
            rst = os.popen("cd {} && git show {} --stat --name-only|grep 'epmet-'".format(git_project_dir, c))
            files = rst.readlines()
            for file in files:
                svc_name = find_service_name_from_file(file)
                if svc_name:
                    # 有些文件可能是不需要发的，比如commons/clients等
                    service_set.add(svc_name)

        finally:
            rst.close()

    return service_set


def find_service_name_from_file(file_rel_path: str):
    """
    根据提交的文件路径，找出他的服务名称
    :param file_rel_path:
    :return:
    """
    if file_rel_path.startswith("epmet-module/"):
        match = re.match(epmet_module_svc_name_reg, file_rel_path)
        return match.group(1)

    if file_rel_path.startswith("epmet-gateway") or file_rel_path.startswith("epmet-auth"):
        match = re.match(epmet_root_svc_name_reg, file_rel_path)
        return match.group(1)


def read_last_commit_ver():
    """
    读取上次发布到的版本号(包含)
    :return:
    """
    with open(commit_record_file_path, 'rt') as lastcommit_file:
        line_contents = lastcommit_file.readlines()
        if len(line_contents) > 0:
            return line_contents[0]


def write_last_commit_ver(new_ver):
    """
    写入上次发布到的版本号(包含)
    :return:
    """
    with open(commit_record_file_path, 'wt') as lastcommit_file:
        lastcommit_file.write(new_ver)


def deploy_svcs(svc_list):
    """
    发布服务
    :param svc_list:
    :return:
    """
    for svc in svc_list:
        rst = requests.post(
            "http://192.168.1.140:9610/jenkins/generic-webhook-trigger/invoke?MODULE_NAME={}&OPERATION=Deploy&token=11a600e78ec001d7864a73f7cf1555ae1a".format(
                svc))
        print(rst.content.decode('utf-8'))


def do():
    # 切换分支
    os.system("cd {} && git checkout dev".format(git_project_dir))

    # 更新代码
    os.system("cd {} && git pull".format(git_project_dir))

    last_commit_ver = read_last_commit_ver()

    try:
        stream = os.popen("cd {} && git log --pretty=oneline --no-merges -20".format(git_project_dir))
        commits = stream.readlines()

        # 根据commits找出最近提交的commits
        last_commits = findLatestCommits(commits, last_commit_ver, max_commit_qty)

        if not last_commits or len(last_commits) == 0:
            print("没有找到可发布的提交")
            return

        # 找到这些commits下提交的文件对应的微服务
        svc_set = findModuleList(last_commits)

        # 记录本次发布版本号
        write_last_commit_ver(last_commits[0])

        # 执行jenkins远程部署
        print("要发布的服务:", svc_set)
        deploy_svcs(svc_set)


    finally:
        stream.close()


if __name__ == '__main__':
    do()

# @app.route(rule='/on-dev-push', methods=['GET'])
# def on_dev_push():
#     do()
#     return "success"


# app.run(host="0.0.0.0", port=7998, debug=True)  # 多线程模式

# python main.py runserver 0.0.0.0:7999