#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
webnovel 统一入口（面向 skills / agents 的稳定 CLI）

设计目标：
- 只有一个入口命令，避免到处拼 `python -m data_modules.xxx ...` 导致参数位置/引号/路径炸裂。
- 自动解析正确的 book project_root（包含 `.webnovel/state.json` 的目录）。
- 所有写入类命令在解析到 project_root 后，统一前置 `--project-root` 传给具体模块。

典型用法（推荐，不依赖 PYTHONPATH / 不要求 cd）：
  python "<SCRIPTS_DIR>/webnovel.py" where
  python "<SCRIPTS_DIR>/webnovel.py" use D:\\wk\\xiaoshuo\\凡人资本论
  python "<SCRIPTS_DIR>/webnovel.py" --project-root D:\\wk\\xiaoshuo index stats
  python "<SCRIPTS_DIR>/webnovel.py" --project-root D:\\wk\\xiaoshuo state process-chapter --chapter 100 --data @payload.json
  python "<SCRIPTS_DIR>/webnovel.py" --project-root D:\\wk\\xiaoshuo extract-context --chapter 100 --format json

也支持（不推荐，容易踩 PYTHONPATH/cd/参数顺序坑）：
  python -m data_modules.webnovel where
"""

from __future__ import annotations

import argparse
import importlib
import subprocess
import sys
from pathlib import Path
from typing import Optional

from runtime_compat import normalize_windows_path
from project_locator import resolve_project_root, write_current_project_pointer, update_global_registry_current_project


def _scripts_dir() -> Path:
    # data_modules/webnovel.py -> data_modules -> scripts
    return Path(__file__).resolve().parent.parent


def _resolve_root(explicit_project_root: Optional[str]) -> Path:
    # 允许显式传入工作区根目录或书项目根目录
    raw = explicit_project_root
    if raw:
        return resolve_project_root(raw)
    return resolve_project_root()


def _strip_project_root_args(argv: list[str]) -> list[str]:
    """
    下游工具统一由本入口注入 `--project-root`，避免重复传参导致 argparse 报错/歧义。
    """
    out: list[str] = []
    i = 0
    while i < len(argv):
        tok = argv[i]
        if tok == "--project-root":
            i += 2
            continue
        if tok.startswith("--project-root="):
            i += 1
            continue
        out.append(tok)
        i += 1
    return out


def _run_data_module(module: str, argv: list[str]) -> int:
    """
    Import `data_modules.<module>` and call its main(), while isolating sys.argv.
    """
    mod = importlib.import_module(f"data_modules.{module}")
    main = getattr(mod, "main", None)
    if not callable(main):
        raise RuntimeError(f"data_modules.{module} 缺少可调用的 main()")

    old_argv = sys.argv
    try:
        sys.argv = [f"data_modules.{module}"] + argv
        try:
            main()
            return 0
        except SystemExit as e:
            return int(e.code or 0)
    finally:
        sys.argv = old_argv


def _run_script(script_name: str, argv: list[str]) -> int:
    """
    Run a script under `.claude/scripts/` via a subprocess.

    用途：兼容没有 main() 的脚本（例如 workflow_manager.py）。
    """
    script_path = _scripts_dir() / script_name
    if not script_path.is_file():
        raise FileNotFoundError(f"未找到脚本: {script_path}")
    proc = subprocess.run([sys.executable, str(script_path), *argv])
    return int(proc.returncode or 0)


def cmd_where(args: argparse.Namespace) -> int:
    root = _resolve_root(args.project_root)
    print(str(root))
    return 0


def cmd_use(args: argparse.Namespace) -> int:
    project_root = normalize_windows_path(args.project_root).expanduser()
    try:
        project_root = project_root.resolve()
    except Exception:
        project_root = project_root

    workspace_root: Optional[Path] = None
    if args.workspace_root:
        workspace_root = normalize_windows_path(args.workspace_root).expanduser()
        try:
            workspace_root = workspace_root.resolve()
        except Exception:
            workspace_root = workspace_root

    # 1) 写入工作区指针（若工作区内存在 `.claude/`）
    pointer_file = write_current_project_pointer(project_root, workspace_root=workspace_root)
    if pointer_file is not None:
        print(f"workspace pointer: {pointer_file}")
    else:
        print("workspace pointer: (skipped)")

    # 2) 写入用户级 registry（保证全局安装/空上下文可恢复）
    reg_path = update_global_registry_current_project(workspace_root=workspace_root, project_root=project_root)
    if reg_path is not None:
        print(f"global registry: {reg_path}")
    else:
        print("global registry: (skipped)")

    return 0


def main() -> None:
    parser = argparse.ArgumentParser(description="webnovel unified CLI")
    parser.add_argument("--project-root", help="书项目根目录或工作区根目录（可选，默认自动检测）")

    sub = parser.add_subparsers(dest="tool", required=True)

    p_where = sub.add_parser("where", help="打印解析出的 project_root")
    p_where.set_defaults(func=cmd_where)

    p_use = sub.add_parser("use", help="绑定当前工作区使用的书项目（写入指针/registry）")
    p_use.add_argument("project_root", help="书项目根目录（必须包含 .webnovel/state.json）")
    p_use.add_argument("--workspace-root", help="工作区根目录（可选；默认由运行环境推断）")
    p_use.set_defaults(func=cmd_use)

    # Pass-through to data modules
    p_index = sub.add_parser("index", help="转发到 index_manager")
    p_index.add_argument("args", nargs=argparse.REMAINDER)

    p_state = sub.add_parser("state", help="转发到 state_manager")
    p_state.add_argument("args", nargs=argparse.REMAINDER)

    p_rag = sub.add_parser("rag", help="转发到 rag_adapter")
    p_rag.add_argument("args", nargs=argparse.REMAINDER)

    p_style = sub.add_parser("style", help="转发到 style_sampler")
    p_style.add_argument("args", nargs=argparse.REMAINDER)

    p_entity = sub.add_parser("entity", help="转发到 entity_linker")
    p_entity.add_argument("args", nargs=argparse.REMAINDER)

    p_context = sub.add_parser("context", help="转发到 context_manager")
    p_context.add_argument("args", nargs=argparse.REMAINDER)

    p_migrate = sub.add_parser("migrate", help="转发到 migrate_state_to_sqlite")
    p_migrate.add_argument("args", nargs=argparse.REMAINDER)

    # Pass-through to scripts
    p_workflow = sub.add_parser("workflow", help="转发到 workflow_manager.py")
    p_workflow.add_argument("args", nargs=argparse.REMAINDER)

    p_status = sub.add_parser("status", help="转发到 status_reporter.py")
    p_status.add_argument("args", nargs=argparse.REMAINDER)

    p_update_state = sub.add_parser("update-state", help="转发到 update_state.py")
    p_update_state.add_argument("args", nargs=argparse.REMAINDER)

    p_backup = sub.add_parser("backup", help="转发到 backup_manager.py")
    p_backup.add_argument("args", nargs=argparse.REMAINDER)

    p_archive = sub.add_parser("archive", help="转发到 archive_manager.py")
    p_archive.add_argument("args", nargs=argparse.REMAINDER)

    p_init = sub.add_parser("init", help="转发到 init_project.py（初始化项目）")
    p_init.add_argument("args", nargs=argparse.REMAINDER)

    p_extract_context = sub.add_parser("extract-context", help="转发到 extract_chapter_context.py")
    p_extract_context.add_argument("--chapter", type=int, required=True, help="目标章节号")
    p_extract_context.add_argument("--format", choices=["text", "json"], default="text", help="输出格式")

    # 兼容：允许 `--project-root` 出现在任意位置（减少 agents/skills 拼命令的出错率）
    from .cli_args import normalize_global_project_root

    argv = normalize_global_project_root(sys.argv[1:])
    args = parser.parse_args(argv)

    # where/use 直接执行
    if hasattr(args, "func"):
        code = int(args.func(args) or 0)
        raise SystemExit(code)

    tool = args.tool
    rest = list(getattr(args, "args", []) or [])
    # argparse.REMAINDER 可能以 `--` 开头占位，这里去掉
    if rest[:1] == ["--"]:
        rest = rest[1:]
    rest = _strip_project_root_args(rest)

    # init 是创建项目，不应该依赖/注入已存在 project_root
    if tool == "init":
        raise SystemExit(_run_script("init_project.py", rest))

    # 其余工具：统一解析 project_root 后前置给下游
    project_root = _resolve_root(args.project_root)
    forward_args = ["--project-root", str(project_root)]

    if tool == "index":
        raise SystemExit(_run_data_module("index_manager", [*forward_args, *rest]))
    if tool == "state":
        raise SystemExit(_run_data_module("state_manager", [*forward_args, *rest]))
    if tool == "rag":
        raise SystemExit(_run_data_module("rag_adapter", [*forward_args, *rest]))
    if tool == "style":
        raise SystemExit(_run_data_module("style_sampler", [*forward_args, *rest]))
    if tool == "entity":
        raise SystemExit(_run_data_module("entity_linker", [*forward_args, *rest]))
    if tool == "context":
        raise SystemExit(_run_data_module("context_manager", [*forward_args, *rest]))
    if tool == "migrate":
        raise SystemExit(_run_data_module("migrate_state_to_sqlite", [*forward_args, *rest]))

    if tool == "workflow":
        raise SystemExit(_run_script("workflow_manager.py", [*forward_args, *rest]))
    if tool == "status":
        raise SystemExit(_run_script("status_reporter.py", [*forward_args, *rest]))
    if tool == "update-state":
        raise SystemExit(_run_script("update_state.py", [*forward_args, *rest]))
    if tool == "backup":
        raise SystemExit(_run_script("backup_manager.py", [*forward_args, *rest]))
    if tool == "archive":
        raise SystemExit(_run_script("archive_manager.py", [*forward_args, *rest]))
    if tool == "extract-context":
        return_args = [*forward_args, "--chapter", str(args.chapter), "--format", str(args.format)]
        raise SystemExit(_run_script("extract_chapter_context.py", return_args))

    raise SystemExit(2)


if __name__ == "__main__":
    main()