"""命令行工具"""

import argparse
import sys
import json
from datetime import datetime
from typing import List

from .db import db
from .config import ITEM_TYPES, TODO_STATUS, PRIORITY_LEVELS


def main():
    parser = argparse.ArgumentParser(
        description="Xian Favor - 收藏关注系统",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
示例:
  xian_favor add text "这是我的笔记" -t "笔记,重要"
  xian_favor add link "https://example.com" --title "示例网站" -t "技术"
  xian_favor add todo "完成项目" -p high -d "2024-12-31" -t "工作"
  xian_favor add column "https://column.example.com/feed" --title "技术专栏" -t "RSS"
  xian_favor list
  xian_favor list --type todo --status pending
  xian_favor search "关键词"
  xian_favor show 1
  xian_favor edit 1 --status completed --note "已完成"
  xian_favor done 1
  xian_favor delete 1
  xian_favor tags
  xian_favor stats
        """
    )
    
    subparsers = parser.add_subparsers(dest="command", help="命令")
    
    # ============ add 命令 ============
    add_parser = subparsers.add_parser("add", help="添加新条目")
    add_parser.add_argument("type", choices=ITEM_TYPES, help="类型: text/link/column/todo")
    add_parser.add_argument("content", help="内容或URL")
    add_parser.add_argument("--title", "-T", help="标题")
    add_parser.add_argument("--url", "-u", help="URL (link/column类型)")
    add_parser.add_argument("--source", "-s", help="来源")
    add_parser.add_argument("--status", choices=TODO_STATUS, default="pending", help="状态 (todo)")
    add_parser.add_argument("--priority", "-p", choices=PRIORITY_LEVELS, default="medium", help="优先级")
    add_parser.add_argument("--due-date", "-d", help="截止日期 (YYYY-MM-DD)")
    add_parser.add_argument("--note", "-n", help="备注")
    add_parser.add_argument("--tags", "-t", help="标签 (逗号分隔)")
    
    # ============ list 命令 ============
    list_parser = subparsers.add_parser("list", help="列出条目")
    list_parser.add_argument("--type", choices=ITEM_TYPES, help="类型过滤")
    list_parser.add_argument("--status", choices=TODO_STATUS, help="状态过滤")
    list_parser.add_argument("--tag", help="标签过滤")
    list_parser.add_argument("--limit", "-l", type=int, default=20, help="数量限制")
    list_parser.add_argument("--json", "-j", action="store_true", help="JSON输出")
    
    # ============ show 命令 ============
    show_parser = subparsers.add_parser("show", help="查看详情")
    show_parser.add_argument("id", type=int, help="条目ID")
    show_parser.add_argument("--json", "-j", action="store_true", help="JSON输出")
    
    # ============ edit 命令 ============
    edit_parser = subparsers.add_parser("edit", help="编辑条目")
    edit_parser.add_argument("id", type=int, help="条目ID")
    edit_parser.add_argument("--title", "-T", help="标题")
    edit_parser.add_argument("--content", "-c", help="内容")
    edit_parser.add_argument("--url", "-u", help="URL")
    edit_parser.add_argument("--source", "-s", help="来源")
    edit_parser.add_argument("--status", choices=TODO_STATUS, help="状态")
    edit_parser.add_argument("--priority", "-p", choices=PRIORITY_LEVELS, help="优先级")
    edit_parser.add_argument("--due-date", "-d", help="截止日期")
    edit_parser.add_argument("--note", "-n", help="备注")
    edit_parser.add_argument("--tags", "-t", help="标签 (逗号分隔, 覆盖)")
    
    # ============ done 命令 ============
    done_parser = subparsers.add_parser("done", help="完成待办")
    done_parser.add_argument("id", type=int, help="条目ID")
    
    # ============ delete 命令 ============
    delete_parser = subparsers.add_parser("delete", help="删除条目")
    delete_parser.add_argument("id", type=int, help="条目ID")
    delete_parser.add_argument("-f", "--force", action="store_true", help="强制删除不确认")
    
    # ============ search 命令 ============
    search_parser = subparsers.add_parser("search", help="搜索条目")
    search_parser.add_argument("keyword", help="关键词")
    search_parser.add_argument("--type", choices=ITEM_TYPES, help="类型过滤")
    search_parser.add_argument("--limit", "-l", type=int, default=20, help="数量限制")
    search_parser.add_argument("--json", "-j", action="store_true", help="JSON输出")
    
    # ============ tags 命令 ============
    tags_parser = subparsers.add_parser("tags", help="标签管理")
    tags_parser.add_argument("--delete", "-d", help="删除标签")
    
    # ============ stats 命令 ============
    subparsers.add_parser("stats", help="统计信息")
    
    # ============ serve 命令 ============
    serve_parser = subparsers.add_parser("serve", help="启动API服务")
    serve_parser.add_argument("--host", default="0.0.0.0", help="主机")
    serve_parser.add_argument("--port", type=int, default=19014, help="端口")
    
    # 解析参数
    args = parser.parse_args()
    
    if not args.command:
        parser.print_help()
        return
    
    # 执行命令
    try:
        if args.command == "add":
            cmd_add(args)
        elif args.command == "list":
            cmd_list(args)
        elif args.command == "show":
            cmd_show(args)
        elif args.command == "edit":
            cmd_edit(args)
        elif args.command == "done":
            cmd_done(args)
        elif args.command == "delete":
            cmd_delete(args)
        elif args.command == "search":
            cmd_search(args)
        elif args.command == "tags":
            cmd_tags(args)
        elif args.command == "stats":
            cmd_stats(args)
        elif args.command == "serve":
            cmd_serve(args)
    except Exception as e:
        print(f"❌ 错误: {e}", file=sys.stderr)
        sys.exit(1)


# ============ 命令实现 ============

def parse_tags(tags_str: str) -> List[str]:
    """解析标签字符串"""
    if not tags_str:
        return []
    return [t.strip() for t in tags_str.split(",") if t.strip()]


def format_item(item: dict, brief: bool = True) -> str:
    """格式化条目显示"""
    type_icons = {
        "text": "📝",
        "link": "🔗",
        "column": "📰",
        "todo": "✅"
    }
    status_icons = {
        "pending": "⏳",
        "in_progress": "🔄",
        "completed": "✅"
    }
    priority_icons = {
        "low": "🟢",
        "medium": "🟡",
        "high": "🟠",
        "urgent": "🔴"
    }
    
    icon = type_icons.get(item['type'], "📄")
    status = status_icons.get(item.get('status', ''), '')
    priority = priority_icons.get(item.get('priority', ''), '')
    
    title = item.get('title') or item.get('content', '')[:50]
    tags_str = f" [{', '.join(item['tags'])}]" if item.get('tags') else ""
    
    if brief:
        return f"  {icon} [{item['id']}] {title}{tags_str}"
    else:
        lines = [
            f"{icon} [{item['id']}] {title}",
            f"  类型: {item['type']}",
        ]
        if item.get('content'):
            lines.append(f"  内容: {item['content'][:200]}")
        if item.get('url'):
            lines.append(f"  URL: {item['url']}")
        if item.get('source'):
            lines.append(f"  来源: {item['source']}")
        if item['type'] == 'todo':
            lines.append(f"  状态: {status} {item.get('status', 'pending')}")
            lines.append(f"  优先级: {priority} {item.get('priority', 'medium')}")
            if item.get('due_date'):
                lines.append(f"  截止: {item['due_date']}")
        if item.get('note'):
            lines.append(f"  备注: {item['note']}")
        if item.get('tags'):
            lines.append(f"  标签: {', '.join(item['tags'])}")
        lines.append(f"  创建: {item['created_at'][:19]}")
        return "\n".join(lines)


def cmd_add(args):
    """添加条目"""
    tags = parse_tags(args.tags)
    
    # 根据类型处理内容
    content = args.content
    url = args.url
    
    if args.type == "link":
        url = url or args.content
        content = None
    elif args.type == "column":
        url = url or args.content
        content = None
    
    item_id = db.create_item(
        type=args.type,
        title=args.title,
        content=content,
        url=url,
        source=args.source,
        status=args.status,
        priority=args.priority,
        due_date=args.due_date,
        note=args.note,
        tags=tags
    )
    
    item = db.get_item(item_id)
    print(f"✅ 创建成功 (ID: {item_id})")
    print(format_item(item, brief=False))


def cmd_list(args):
    """列出条目"""
    items = db.list_items(
        type=args.type,
        status=args.status,
        tag=args.tag,
        limit=args.limit
    )
    
    if args.json:
        print(json.dumps(items, ensure_ascii=False, indent=2))
        return
    
    if not items:
        print("📭 没有找到条目")
        return
    
    type_labels = {"text": "文本", "link": "链接", "column": "专栏", "todo": "待办"}
    filter_desc = []
    if args.type:
        filter_desc.append(f"类型: {type_labels.get(args.type, args.type)}")
    if args.status:
        filter_desc.append(f"状态: {args.status}")
    if args.tag:
        filter_desc.append(f"标签: {args.tag}")
    
    if filter_desc:
        print(f"📋 筛选: {' | '.join(filter_desc)}")
    else:
        print(f"📋 全部条目 ({len(items)} 条)")
    print("-" * 50)
    
    for item in items:
        print(format_item(item))


def cmd_show(args):
    """查看详情"""
    item = db.get_item(args.id)
    
    if not item:
        print(f"❌ 条目不存在: {args.id}")
        return
    
    if args.json:
        print(json.dumps(item, ensure_ascii=False, indent=2))
        return
    
    print(format_item(item, brief=False))


def cmd_edit(args):
    """编辑条目"""
    update_data = {}
    
    if args.title is not None:
        update_data['title'] = args.title
    if args.content is not None:
        update_data['content'] = args.content
    if args.url is not None:
        update_data['url'] = args.url
    if args.source is not None:
        update_data['source'] = args.source
    if args.status is not None:
        update_data['status'] = args.status
    if args.priority is not None:
        update_data['priority'] = args.priority
    if args.due_date is not None:
        update_data['due_date'] = args.due_date
    if args.note is not None:
        update_data['note'] = args.note
    if args.tags is not None:
        update_data['tags'] = parse_tags(args.tags)
    
    if not update_data:
        print("❌ 没有指定要更新的字段")
        return
    
    if db.update_item(args.id, **update_data):
        item = db.get_item(args.id)
        print(f"✅ 更新成功 (ID: {args.id})")
        print(format_item(item, brief=False))
    else:
        print(f"❌ 更新失败: 条目不存在或没有变化")


def cmd_done(args):
    """完成待办"""
    item = db.get_item(args.id)
    if not item:
        print(f"❌ 条目不存在: {args.id}")
        return
    
    if item['type'] != 'todo':
        print(f"❌ 不是待办事项: {args.id}")
        return
    
    if db.update_item(args.id, status='completed'):
        print(f"✅ 已完成待办 (ID: {args.id})")
    else:
        print(f"❌ 操作失败")


def cmd_delete(args):
    """删除条目"""
    if not args.force:
        item = db.get_item(args.id)
        if not item:
            print(f"❌ 条目不存在: {args.id}")
            return
        
        print(format_item(item, brief=False))
        confirm = input("确认删除? [y/N] ")
        if confirm.lower() != 'y':
            print("❌ 取消删除")
            return
    
    if db.delete_item(args.id):
        print(f"✅ 已删除 (ID: {args.id})")
    else:
        print(f"❌ 删除失败")


def cmd_search(args):
    """搜索条目"""
    items = db.list_items(
        type=args.type,
        keyword=args.keyword,
        limit=args.limit
    )
    
    if args.json:
        print(json.dumps(items, ensure_ascii=False, indent=2))
        return
    
    if not items:
        print(f"🔍 没有找到匹配 '{args.keyword}' 的条目")
        return
    
    print(f"🔍 搜索 '{args.keyword}' ({len(items)} 条)")
    print("-" * 50)
    
    for item in items:
        print(format_item(item))


def cmd_tags(args):
    """标签管理"""
    if args.delete:
        if db.delete_tag(name=args.delete):
            print(f"✅ 已删除标签: {args.delete}")
        else:
            print(f"❌ 标签不存在: {args.delete}")
        return
    
    tags = db.list_tags()
    if not tags:
        print("🏷️ 没有标签")
        return
    
    print(f"🏷️ 标签列表 ({len(tags)} 个)")
    print("-" * 50)
    for tag in tags:
        print(f"  • {tag['name']} ({tag['item_count']} 条)")


def cmd_stats(args):
    """统计信息"""
    stats = db.stats()
    
    print("📊 收藏统计")
    print("-" * 30)
    print(f"总条目: {stats['total']}")
    
    if stats.get('by_type'):
        print("\n按类型:")
        type_labels = {"text": "文本", "link": "链接", "column": "专栏", "todo": "待办"}
        for t, count in stats['by_type'].items():
            print(f"  • {type_labels.get(t, t)}: {count}")
    
    if stats.get('todo_status'):
        print("\n待办状态:")
        status_labels = {"pending": "待处理", "in_progress": "进行中", "completed": "已完成"}
        for s, count in stats['todo_status'].items():
            print(f"  • {status_labels.get(s, s)}: {count}")
    
    print(f"\n标签数: {stats['tags']}")


def cmd_serve(args):
    """启动API服务"""
    from .api import start_server
    print(f"🚀 启动API服务: http://{args.host}:{args.port}")
    start_server(host=args.host, port=args.port)


if __name__ == "__main__":
    main()