import importlib
import os
import sys
from pathlib import Path

from fastapi.testclient import TestClient

os.environ["JOB_BACKEND"] = "memory"

CURRENT_DIR = Path(__file__).resolve().parent
BACKEND_DIR = CURRENT_DIR.parent
if str(BACKEND_DIR) not in sys.path:
    sys.path.insert(0, str(BACKEND_DIR))

import job_handlers  # type: ignore
import job_system  # type: ignore

main = importlib.import_module("main")

API_KEY = main.API_KEY
HEADERS = {"X-API-Key": API_KEY}


def setup_function():
    job_system.reset_job_manager()
    main._handlers_registered = False


def _submit(client, content="test document", doc_type="txt", headers=None):
    return client.post("/v1/compress/submit", headers=headers if headers is not None else HEADERS, json={
        "content": content,
        "docType": doc_type,
    })


def _status(client, task_id, headers=None):
    return client.get(f"/v1/compress/status?task_id={task_id}", headers=headers if headers is not None else HEADERS)


def test_submit_empty_content_returns_400():
    with TestClient(main.app) as client:
        resp = _submit(client, "")
    assert resp.status_code == 400


def test_submit_too_long_returns_400(monkeypatch):
    monkeypatch.setattr(main, "DOC_COMPRESS_CONTEXT_LIMIT", 10)
    with TestClient(main.app) as client:
        resp = _submit(client, "a" * 100)
    assert resp.status_code == 400


def test_submit_success_returns_task_id():
    with TestClient(main.app) as client:
        resp = _submit(client, "hello world")
    assert resp.status_code == 200
    data = resp.json()
    assert "task_id" in data
    assert data["status"] == "queued"


def test_status_not_found_returns_404():
    with TestClient(main.app) as client:
        resp = _status(client, "nonexistent-id")
    assert resp.status_code == 404


def test_status_completed(monkeypatch):
    async def fake_call_ollama(prompt, system_prompt=None, **kwargs):  # noqa: ARG001
        return {"content": f"[compressed] {prompt[:20]}"}

    monkeypatch.setattr(job_handlers, "call_ollama", fake_call_ollama)
    with TestClient(main.app) as client:
        resp = _submit(client, "important document text")
        task_id = resp.json()["task_id"]
        status_resp = _status(client, task_id)
        data = status_resp.json()
    assert status_resp.status_code == 200
    assert data["status"] in {"queued", "processing", "completed"}