"""策略管理路由：代码文件 CRUD + 实例 CRUD（spec §12 三层模型）。

鉴权说明：MVP 不挂 verify_token，便于本地联调与单测；敏感写操作（写文件）
已由 write_strategy_file 的 py_compile 语法门禁兜底。
"""
from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from .strategy_registry import (
    list_strategy_files, read_strategy_file, write_strategy_file,
)
from . import instance_store

router = APIRouter()


class FileWriteRequest(BaseModel):
    code: str


class InstancePayload(BaseModel):
    code_file: str = ""
    name: str = ""
    type: str = "cta"
    params: dict = {}
    symbol_or_pool: str = ""
    interval: str = "d"
    match_session: str = "next_open"


@router.get("/strategy/files")
def get_files():
    """代码文件列表（不含 code 体）。"""
    return list_strategy_files()


@router.get("/strategy/file/{name}")
def get_file(name: str):
    """读单个策略文件全量（含 code）。"""
    try:
        return read_strategy_file(name)
    except ValueError:
        raise HTTPException(status_code=404, detail="策略文件不存在")


@router.post("/strategy/file/{name}")
def post_file(name: str, req: FileWriteRequest):
    """保存策略代码（py_compile 校验，失败 400）。"""
    try:
        write_strategy_file(name, req.code)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {"ok": True}


@router.post("/strategy/file/{name}/check")
def check_file(name: str, req: FileWriteRequest):
    """语法检查（不落盘）：编辑器「语法检查」按钮真接线。

    原前端按钮是原型期假实现（sleep 600ms 恒报通过，2026-08-15 用户实况
    删括号仍报成功）。compile() 不执行代码，只做语法编译；SyntaxError
    返回行号+消息供编辑器定位。
    """
    try:
        compile(req.code, name, "exec")
    except SyntaxError as e:
        return {"ok": False, "error": str(e.msg or e), "line": e.lineno}
    except ValueError as e:  # null bytes 等 compile 级错误
        return {"ok": False, "error": str(e), "line": None}
    return {"ok": True}


@router.get("/strategy/instances")
def get_instances():
    return instance_store.list_instances()


@router.post("/strategy/instances")
def post_instance(req: InstancePayload):
    new_id = instance_store.create_instance(req.model_dump())
    return {"id": new_id}


@router.get("/strategy/instances/{inst_id}")
def get_instance(inst_id: int):
    return instance_store.get_instance(inst_id)


@router.put("/strategy/instances/{inst_id}")
def put_instance(inst_id: int, req: InstancePayload):
    instance_store.update_instance(inst_id, req.model_dump())
    return {"ok": True}


@router.delete("/strategy/instances/{inst_id}")
def del_instance(inst_id: int):
    ok = instance_store.delete_instance(inst_id)
    if not ok:
        raise HTTPException(status_code=404, detail="实例不存在")
    return {"ok": True}