from __future__ import annotations

import json
from fastapi import HTTPException, Request
from fastapi.responses import JSONResponse

def _inject(context):globals().update(context)

async def create_ocean_batch(request:Request):
    uid,_=await resolve_request_user(request)
    try:body=await request.json()
    except Exception as exc:raise HTTPException(400,"invalid json") from exc
    prompt=str((body or {}).get("prompt") or "").strip()
    spec=parse_ocean_batch_request(prompt)
    if not spec:raise HTTPException(400,"该请求不是可自动拆分的 Ocean 多日批量导出；请提供日期范围/月、经纬度范围和变量。")
    return await OCEAN_BATCH_MANAGER.create(uid,prompt,spec,str((body or {}).get("thread_id") or ""))

async def get_ocean_batch(job_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    data=OCEAN_BATCH_MANAGER.get(job_id)
    if not data:raise HTTPException(404,"batch job not found")
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    return data

async def cancel_ocean_batch(job_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    return await OCEAN_BATCH_MANAGER.cancel(job_id)

async def resume_ocean_batch(job_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    await OCEAN_BATCH_MANAGER.start(job_id)
    return OCEAN_BATCH_MANAGER.get(job_id)

async def retry_ocean_batch(job_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    return await OCEAN_BATCH_MANAGER.retry_failed(job_id)

async def retry_ocean_batch_subtask(job_id:str,subtask_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    if not any(x.get("subtask_id")==subtask_id for x in raw.get("subtasks",[])):
        raise HTTPException(404,"subtask not found")
    return await OCEAN_BATCH_MANAGER.retry_subtask(job_id,subtask_id)

async def refresh_ocean_batch_download(job_id:str,subtask_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    if not any(x.get("subtask_id")==subtask_id for x in raw.get("subtasks",[])):
        raise HTTPException(404,"subtask not found")
    try:return await OCEAN_BATCH_MANAGER.refresh_download_url(job_id,subtask_id)
    except Exception as exc:raise HTTPException(502,f"刷新下载链接失败：{str(exc)[:300]}") from exc

async def ocean_batch_manifest(job_id:str,request:Request):
    uid,_=await resolve_request_user(request)
    raw=OCEAN_BATCH_MANAGER._read(job_id)
    if not raw:raise HTTPException(404,"batch job not found")
    if raw.get("user_id") and uid and raw.get("user_id")!=uid:raise HTTPException(403,"forbidden")
    return JSONResponse(OCEAN_BATCH_MANAGER.manifest(job_id),headers={"Content-Disposition":f'attachment; filename="ocean_batch_{job_id}_manifest.json"'})

def register_ocean_batch_routes(app,context):
    _inject(context)
    app.add_api_route("/api/ocean/batch",create_ocean_batch,methods=["POST"])
    app.add_api_route("/api/ocean/batch/{job_id}",get_ocean_batch,methods=["GET"])
    app.add_api_route("/api/ocean/batch/{job_id}",cancel_ocean_batch,methods=["DELETE"])
    app.add_api_route("/api/ocean/batch/{job_id}/resume",resume_ocean_batch,methods=["POST"])
    app.add_api_route("/api/ocean/batch/{job_id}/retry",retry_ocean_batch,methods=["POST"])
    app.add_api_route("/api/ocean/batch/{job_id}/subtasks/{subtask_id}/retry",retry_ocean_batch_subtask,methods=["POST"])
    app.add_api_route("/api/ocean/batch/{job_id}/files/{subtask_id}/refresh",refresh_ocean_batch_download,methods=["POST"])
    app.add_api_route("/api/ocean/batch/{job_id}/manifest",ocean_batch_manifest,methods=["GET"])