#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
import io
import re
import datetime
from pathlib import Path
from typing import Dict, List, Optional, Tuple

if sys.platform == "win32":
    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8")
    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, encoding="utf-8")


def extract_existing_frontmatter(file_path: Path) -> Dict[str, any]:
    try:
        content = file_path.read_text(encoding="utf-8")
        match = re.match(r"^---\n(.*?)\n---", content, re.DOTALL)
        if match:
            fm_text = match.group(1)
            fm = {}
            for line in fm_text.split("\n"):
                if ":" in line:
                    key, value = line.split(":", 1)
                    key = key.strip()
                    value = value.strip()
                    if value.startswith("[") or value.startswith("{"):
                        continue
                    elif value.startswith('"') and value.endswith('"'):
                        fm[key] = value.strip('"')
                    elif value:
                        fm[key] = value
            return fm
    except Exception as e:
        print(f"Error reading {file_path.name}: {e}")
    return {}


def get_card_type_from_filename(filename: str) -> Tuple[str, str]:
    name = Path(filename).stem

    if "AI教育" in name or "全球图景" in name or "九校" in name:
        return "concept", "概念"
    elif any(
        x in name
        for x in [
            "CMU",
            "MIT",
            "斯坦福",
            "牛津",
            "哈佛",
            "AIEOU",
            "RAISE",
            "Accelerator",
        ]
    ):
        return "entity", "机构"
    elif any(
        x in name for x in ["Victor", "Emma", "Ken", "Rose", "Neil", "Ryan", "Kestin"]
    ):
        return "entity", "人物"
    elif "知识卡片" in name:
        return "concept", "概念"

    return "concept", "概念"


def update_frontmatter(file_path: Path) -> bool:
    try:
        content = file_path.read_text(encoding="utf-8")

        if not content.startswith("---"):
            print(f"⚠️ No frontmatter in {file_path.name}")
            return False

        fm_match = re.match(r"^---\n(.*?)\n---", content, re.DOTALL)
        if not fm_match:
            print(f"⚠️ Cannot parse frontmatter in {file_path.name}")
            return False

        fm_text = fm_match.group(1)
        body = content[fm_match.end() :]

        existing_fm = {}
        for line in fm_text.split("\n"):
            if ":" in line:
                key, value = line.split(":", 1)
                existing_fm[key.strip()] = value.strip()

        card_type, card_category = get_card_type_from_filename(file_path.name)

        new_fm_lines = [
            "---",
            "categories:",
            '  - "[[LLM Wiki]]"',
            '  - "[[知识卡片]]"',
            "tags:",
        ]

        existing_tags = existing_fm.get("tags", "")
        if existing_tags:
            if existing_tags.startswith("["):
                tag_match = re.findall(r"'([^']+)'", existing_tags)
                for tag in tag_match:
                    new_fm_lines.append(f"  - {tag}")
            else:
                for tag in existing_tags.split(","):
                    tag = tag.strip()
                    if tag:
                        new_fm_lines.append(f"  - {tag}")
        else:
            new_fm_lines.append("  - AI教育")
            new_fm_lines.append("  - 知识卡片")

        new_fm_lines.extend(
            [
                f"type: {card_type}",
                f"created: {existing_fm.get('created', datetime.date.today().isoformat())}",
            ]
        )

        if "updated" in existing_fm:
            new_fm_lines.append(f"updated: {existing_fm['updated']}")
        if "source" in existing_fm:
            new_fm_lines.append(f"source: {existing_fm['source']}")
        if "title" in existing_fm:
            new_fm_lines.append(f"title: {existing_fm['title']}")
        if "review-date" in existing_fm:
            new_fm_lines.append(f"review-date: {existing_fm['review-date']}")
        if "review-status" in existing_fm:
            new_fm_lines.append(f"review-status: {existing_fm['review-status']}")

        new_fm_lines.append("---")

        new_content = "\n".join(new_fm_lines) + body
        file_path.write_text(new_content, encoding="utf-8")

        print(
            f"✅ Updated: {file_path.name} (type={card_type}, category={card_category})"
        )
        return True

    except Exception as e:
        print(f"❌ Error updating {file_path.name}: {e}")
        return False


def main():
    print("=" * 60)
    print("Knowledge Cards Frontmatter Batch Update Tool")
    print("=" * 60)
    print(f"Execution time: {datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")
    print()

    cards_dir = Path(__file__).parent.parent / "知识卡片"

    if not cards_dir.exists():
        print(f"❌ Knowledge cards directory not found: {cards_dir}")
        return

    card_files = list(cards_dir.glob("*.md"))
    print(f"Found {len(card_files)} knowledge card files")
    print()

    success_count = 0
    fail_count = 0

    for card_file in card_files:
        result = update_frontmatter(card_file)
        if result:
            success_count += 1
        else:
            fail_count += 1

    print()
    print("=" * 60)
    print("Update Complete")
    print("=" * 60)
    print(f"Total files: {len(card_files)}")
    print(f"Successfully updated: {success_count}")
    print(f"Failed: {fail_count}")
    print("=" * 60)


if __name__ == "__main__":
    main()