"""JS → WASM 预编译路由。

接口（统一响应格式 {success, data, message}）：
- POST /api/project/{id}/precompile   把项目 JS 预编译为 WASM（仅博主）
- GET  /api/project/{id}/wasm-report  查看最近一次编译报告（公开，仅元信息）
"""

import json

from fastapi import APIRouter, Depends, HTTPException, status

from ..auth import get_current_user
from ..models import ROLE_BLOGGER, User
from ..schemas import UnifiedResponse
from ..services import wasm_builder

router = APIRouter(prefix="/api/project", tags=["project-wasm"])


def _require_blogger(user: User) -> None:
    """校验当前用户是否为博主（与 routers/project.py 保持一致）。"""
    if user.role != ROLE_BLOGGER:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN, detail="只有博主可以管理项目",
        )


@router.post("/{project_id}/precompile", response_model=UnifiedResponse)
def precompile_project(
    project_id: int,
    current_user: User = Depends(get_current_user),
) -> UnifiedResponse:
    """把项目演示目录里的 .js 文件预编译为 WASM（仅博主，不执行上传代码）。"""
    _require_blogger(current_user)
    report = wasm_builder.compile_project(project_id)
    return UnifiedResponse(success=True, data=report, message="JS 预编译完成")


@router.get("/{project_id}/wasm-report", response_model=UnifiedResponse)
def get_wasm_report(project_id: int) -> UnifiedResponse:
    """查看项目最近一次 WASM 编译报告（公开：仅文件名与大小等元信息）。"""
    report_path = wasm_builder.DEMOS_DIR / str(project_id) / "wasm" / "report.json"
    if not report_path.is_file():
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="该项目尚未执行 WASM 预编译",
        )
    report = json.loads(report_path.read_text(encoding="utf-8"))
    return UnifiedResponse(success=True, data=report, message="")