import os, json,hashlib,re
from fastapi import APIRouter, BackgroundTasks
from base_config import path, avatar_url

from git import Repo

from pydantic import BaseModel

from models.gitModels import Users


class RequestBody(BaseModel):
    uuid: str
    repo_url: str

class CommitHash(BaseModel):
    uuid: str
    repo_url: str
    commit_hash: str


def generate_repo_path(uuid, repo_url):
    repo_name = repo_url.split("/")[-1].replace(".git", "")
    base_path = os.path.join(path, uuid)
    return os.path.join(base_path, repo_name), repo_name


def get_repo(uuid, repo_url):
    path, _ = generate_repo_path(uuid, repo_url)

    if not os.path.exists(path):
        return 0
    return Repo(path)


def git_stats_to_json(text):
    pattern = r",?\s*(\d+)\s*files changed|,?\s*(\d+)\s*insertions\(\+\)|,?\s*(\d+)\s+deletions\(\-\)"
    data = re.findall(pattern, text)
    result = {}
    for item in data:
        if item[0]:
            result["files_changed"] = int(item[0])
        if item[1]:
            result["insertions"] = int(item[1])
        if item[2]:
            result["deletions"] = int(item[2])

    return result

testapi = APIRouter()


import hashlib
from fastapi import APIRouter
from git import Repo, GitCommandError
import json


@testapi.post("/log")
async def log(request: RequestBody):
    local_path, _ = generate_repo_path(request.uuid, request.repo_url)
    print(local_path)
    repo = get_repo(request.uuid, request.repo_url)
    if not repo:
        return {
            "status": "404",
            "msg": "仓库不存在",
            "uuid": request.uuid,
            "repo_url": request.repo_url,
            "local_path": local_path
        }

    # 使用git log --numstat一次性获取所有必要信息
    git_log_format = '--pretty=format:%h|%an|%ce|%s|%cd'
    try:
        log_output = repo.git.log(
            git_log_format,
            '--numstat',
            '--no-renames',
            date='format:%Y-%m-%d %H:%M'
        )
    except GitCommandError as e:
        return {"status": "500", "msg": f"获取日志失败: {str(e)}"}

    log = []
    current_commit = None

    for line in log_output.split('\n'):
        if not line.strip():
            continue  # 跳过空行

        if '\t' in line and len(line.split('\t')) == 3:
            # 处理numstat行，例如 "10\t5\tfile.txt"
            if current_commit is None:
                continue  # 防止数据错误
            insertions_str, deletions_str, _ = line.split('\t')
            try:
                insertions = int(insertions_str) if insertions_str != '-' else 0
                deletions = int(deletions_str) if deletions_str != '-' else 0
            except ValueError:
                insertions, deletions = 0, 0
            current_commit['change']['insertions'] += insertions
            current_commit['change']['deletions'] += deletions
            current_commit['change']['files'] += 1
        else:
            # 处理提交信息行，例如 "abc123|Author|email|summary|2023-10-01 12:34"
            if current_commit is not None:
                # 生成avatar的md5
                email = current_commit['email']
                email_md5 = hashlib.md5(email.encode('utf-8')).hexdigest()
                current_commit['avatar'] = f"{avatar_url}{email_md5}?d=identicon"
                log.append(current_commit)
            try:
                commit_hash, author, email, summary, date = line.split('|', 4)
                current_commit = {
                    "commit": commit_hash,
                    "author": author,
                    "email": email,
                    "summary": summary,
                    "date": date,
                    "avatar": "",
                    "change": {
                        "insertions": 0,
                        "deletions": 0,
                        "files": 0
                    }
                }
            except ValueError:
                current_commit = None  # 忽略格式错误行

    # 添加最后一个提交
    if current_commit is not None:
        email = current_commit['email']
        email_md5 = hashlib.md5(email.encode('utf-8')).hexdigest()
        current_commit['avatar'] = f"{avatar_url}{email_md5}?d=identicon"
        log.append(current_commit)

    # 按时间倒序排列（git log默认最新在前）
    print(log)
    return {
        "status": "200",
        "msg": "成功获取日志",
        "uuid": request.uuid,
        "repo_url": request.repo_url,
        "local_path": local_path,
        "git_log": log
    }