import json
import time
from datetime import datetime
from pathlib import Path

# Issue 数据存储在独立的 JSON 文件中
ISSUES_PATH = Path(__file__).parent / "issues.json"

def load_issues():
    """加载所有 Issue 数据"""
    if ISSUES_PATH.exists():
        try:
            with open(ISSUES_PATH, "r", encoding="utf-8") as f:
                return json.load(f)
        except Exception:
            return []
    return []

def save_issues(issues: list):
    """保存 Issue 数据到文件"""
    with open(ISSUES_PATH, "w", encoding="utf-8") as f:
        json.dump(issues, f, indent=2, ensure_ascii=False)

def create_issue(user_id: int, username: str, title: str, issue_type: str, description: str, markdown_sample: str = ""):
    """创建一条新 Issue"""
    issues = load_issues()
    new_issue = {
        "id": int(time.time() * 1000),
        "user_id": user_id,
        "username": username,
        "title": title,
        "type": issue_type,
        "description": description,
        "markdown_sample": markdown_sample,
        "status": "open",
        "created_at": datetime.now().isoformat(),
        "replies": []
    }
    # 插入到最前面（最新的在前）
    issues.insert(0, new_issue)
    save_issues(issues)
    return new_issue

def get_all_issues():
    """获取所有 Issue（管理员用）"""
    return load_issues()

def get_user_issues(user_id: int):
    """获取某用户提交的所有 Issue"""
    issues = load_issues()
    return [i for i in issues if i.get("user_id") == user_id]

def get_issue_by_id(issue_id: int):
    """根据 ID 获取单条 Issue"""
    for i in load_issues():
        if i.get("id") == issue_id:
            return i
    return None

def add_reply(issue_id: int, author: str, content: str):
    """给指定 Issue 添加一条回复"""
    issues = load_issues()
    for i in issues:
        if i.get("id") == issue_id:
            reply = {
                "id": int(time.time() * 1000),
                "author": author,
                "content": content,
                "created_at": datetime.now().isoformat()
            }
            i["replies"].append(reply)
            save_issues(issues)
            return reply
    return None

def update_issue_status(issue_id: int, status: str):
    """更新 Issue 的状态（open / in_progress / closed）"""
    issues = load_issues()
    for i in issues:
        if i.get("id") == issue_id:
            i["status"] = status
            save_issues(issues)
            return i
    return None