"""CLI 工具 — 手动抓取论文。"""

import asyncio
import logging

import typer
from dotenv import load_dotenv

# 在导入 app 模块前加载 .env
load_dotenv()

cli_app = typer.Typer(help="HF Daily Papers 管理 CLI")


@cli_app.command()
def crawl(
    date_str: str = typer.Argument(
        None,
        help="抓取日期 (YYYY-MM-DD)，留空则自动探测",
    ),
    top_n: int = typer.Option(None, "--top", "-n", help="取前 N 篇"),
    force: bool = typer.Option(False, "--force", "-f", help="强制重抓（即使已抓取过）"),
):
    """手动抓取指定日期的 HuggingFace Daily Papers。"""
    from app.config import settings
    from app.database import SessionLocal, engine
    from app.database import init_db as _init
    from app.models import Paper
    from app.services.jobs import create_job, run_job
    from app.utils import today_str, yesterday_str
    from sqlalchemy import func, select

    target = date_str or today_str()

    # 确保数据库和表存在
    import os

    os.makedirs(settings.db_path.parent, exist_ok=True)
    _init(engine)

    db = SessionLocal()
    try:
        # 检查是否已抓取过（非 force 模式）
        if not force and not date_str:
            existing = (
                db.scalar(
                    select(func.count(Paper.id)).where(Paper.paper_date == target)
                )
                or 0
            )
            if existing > 0:
                typer.echo(
                    f"⏭️  {target} 已有 {existing} 篇论文，跳过（用 --force 强制重抓）"
                )
                return

        typer.echo(f"📡 开始抓取 {target} ...")
        job = create_job(
            db,
            "crawl_daily",
            owner="cli_crawl",
            payload={"target_date": target, "top_n": top_n},
        )
        result = asyncio.run(run_job(db, job.id))

        # 未指定日期且今天失败或无数据时，自动回退到昨天
        need_fallback = not date_str and (
            result["status"] == "failed" or result["found"] == 0
        )
        if need_fallback:
            fallback = yesterday_str()
            existing = (
                db.scalar(
                    select(func.count(Paper.id)).where(Paper.paper_date == fallback)
                )
                or 0
            )
            if existing > 0:
                typer.echo(
                    f"⏭️  {fallback} 已有 {existing} 篇论文，跳过（用 --force 强制重抓）"
                )
            else:
                typer.echo(f"🔄 {target} 无数据，尝试 {fallback} ...")
                target = fallback
                job = create_job(
                    db,
                    "crawl_daily",
                    owner="cli_crawl",
                    payload={"target_date": target, "top_n": top_n},
                )
                result = asyncio.run(run_job(db, job.id))

        if result["status"] == "success":
            typer.echo(
                f"✅ 抓取完成：发现 {result['found']} 篇，新增 {result['new']} 篇"
            )
        else:
            typer.echo(f"❌ 抓取失败：{result['error']}", err=True)
            raise typer.Exit(code=1)
    finally:
        db.close()


@cli_app.command()
def summarize(
    arxiv_id: str = typer.Argument(
        None,
        help="指定论文 arXiv ID；留空则批量处理所有 pending",
    ),
    pdf_mode: str = typer.Option(
        "auto",
        "--pdf-mode",
        help="PDF 传递方式：auto（自动选择）| inject（全量注入）| search（pi 自主搜索）",
    ),
    backend: str = typer.Option(
        None,
        "--backend",
        help="总结后端：pi | claude（留空则使用 .env 配置）",
    ),
):
    """手动触发 AI 总结。"""
    from app.config import settings
    from app.database import SessionLocal, engine
    from app.database import init_db as _init
    from app.services.jobs import create_job, run_job

    import os

    if pdf_mode not in ("auto", "inject", "search"):
        typer.echo(
            f"❌ 无效的 pdf_mode: {pdf_mode}，只支持 auto / inject / search", err=True
        )
        raise typer.Exit(code=1)

    if backend:
        if backend not in ("pi", "claude"):
            typer.echo(f"❌ 无效的 backend: {backend}，只支持 pi / claude", err=True)
            raise typer.Exit(code=1)
        settings.SUMMARY_BACKEND = backend

    os.makedirs(settings.db_path.parent, exist_ok=True)
    _init(engine)

    # 配置 logging 输出到终端
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s %(levelname)-5s %(name)s | %(message)s",
        datefmt="%H:%M:%S",
    )

    from app.exceptions import ConflictError, NotFoundError

    db = SessionLocal()
    try:
        if arxiv_id:
            typer.echo(f"🤖 开始总结 {arxiv_id} (mode={pdf_mode}) ...")
            job = create_job(
                db,
                "summarize_one",
                owner="cli_summarize",
                payload={"arxiv_id": arxiv_id, "pdf_mode": pdf_mode, "force": False},
            )
        else:
            typer.echo(f"🤖 开始批量总结 pending 论文 (mode={pdf_mode}) ...")
            job = create_job(
                db,
                "summarize_batch",
                owner="cli_summarize",
                payload={"pdf_mode": pdf_mode},
            )

        result = asyncio.run(run_job(db, job.id))
        if result.get("status") == "failed":
            typer.echo(f"❌ 总结失败：{result.get('error')}", err=True)
            raise typer.Exit(code=1)
        typer.echo(f"✅ 总结完成：{result}")
    except NotFoundError as exc:
        typer.echo(f"❌ {exc.message}", err=True)
        raise typer.Exit(code=1) from exc
    except ConflictError as exc:
        typer.echo(f"⚠️  {exc.message}", err=True)
        raise typer.Exit(code=1) from exc
    finally:
        db.close()


@cli_app.command()
def init_db():
    """初始化数据库表。"""
    from app.config import settings
    from app.database import engine
    from app.database import init_db as _init

    import os

    os.makedirs(settings.db_path.parent, exist_ok=True)
    _init(engine)
    typer.echo(f"✅ 数据库已初始化：{settings.db_path}")


@cli_app.command("rebuild-derived")
def rebuild_derived(
    fts: bool = typer.Option(False, "--fts", help="重建 FTS5 全文索引"),
    chroma: bool = typer.Option(False, "--chroma", help="重建 ChromaDB 语义索引"),
):
    """重建可派生数据索引。"""
    from app.config import settings
    from app.database import SessionLocal, engine
    from app.database import init_db as _init
    from app.services.jobs import create_job, run_job

    import os

    if not fts and not chroma:
        fts = True

    os.makedirs(settings.db_path.parent, exist_ok=True)
    _init(engine)

    db = SessionLocal()
    try:
        for job_type in [
            *(["reindex_fts"] if fts else []),
            *(["reindex_chroma"] if chroma else []),
        ]:
            job = create_job(db, job_type, owner="cli_rebuild_derived", payload={})
            result = asyncio.run(run_job(db, job.id))
            typer.echo(f"{job_type}: {result}")
            if result.get("status") == "failed":
                raise typer.Exit(code=1)
    finally:
        db.close()


if __name__ == "__main__":
    cli_app()