from datetime import timedelta

from django.utils import timezone

from apps.agents.models import AgentRun
from apps.agents.services import build_config_snapshot, execute_agent_run
from apps.agents.tasks import cleanup_expired_agent_runs
from apps.modelhub.services import CompletionResult

from .helpers import create_agent


def create_run(version):
    return AgentRun.objects.create(
        definition=version.definition,
        agent_version=version,
        sandbox=version.status == "draft",
        input_payload={"problem": "无法登录"},
        config_snapshot=build_config_snapshot(version),
        total_steps=version.steps.count(),
    )


def test_ordered_runtime_records_steps_usage_and_final_output(db, monkeypatch):
    _, version = create_agent()
    outputs = iter(
        [
            CompletionResult('{"summary":"账号异常"}', 10, 5),
            CompletionResult('{"reply":"请重置密码"}', 12, 6),
        ]
    )
    monkeypatch.setattr(
        "apps.modelhub.services._request_completion",
        lambda *args, **kwargs: next(outputs),
    )
    run = create_run(version)

    execute_agent_run(run.id)

    run.refresh_from_db()
    assert run.status == "succeeded"
    assert run.final_output == {"reply": "请重置密码"}
    assert run.input_tokens == 22
    assert run.output_tokens == 11
    assert list(run.steps.values_list("code", flat=True)) == ["structure", "reply"]


def test_invalid_structure_is_repaired_once(db, monkeypatch):
    _, version = create_agent(two_steps=False)
    outputs = iter(
        [
            CompletionResult("not-json", 4, 2),
            CompletionResult('{"summary":"已修复"}', 5, 3),
        ]
    )
    monkeypatch.setattr(
        "apps.modelhub.services._request_completion",
        lambda *args, **kwargs: next(outputs),
    )
    run = create_run(version)

    execute_agent_run(run.id)

    run.refresh_from_db()
    step = run.steps.get()
    assert run.status == "succeeded"
    assert step.attempts.count() == 2
    assert list(step.attempts.values_list("attempt_type", flat=True)) == ["initial", "repair"]


def test_second_invalid_structure_fails_and_stops(db, monkeypatch):
    _, version = create_agent()
    outputs = iter(
        [
            CompletionResult("not-json", 4, 2),
            CompletionResult("still-not-json", 5, 3),
        ]
    )
    monkeypatch.setattr(
        "apps.modelhub.services._request_completion",
        lambda *args, **kwargs: next(outputs),
    )
    run = create_run(version)

    execute_agent_run(run.id)

    run.refresh_from_db()
    assert run.status == "failed"
    assert run.steps.count() == 1
    assert run.steps.get().status == "failed"


def test_cancellation_before_first_step_stops_run(db):
    _, version = create_agent()
    run = create_run(version)
    run.cancellation_requested_at = timezone.now()
    run.save(update_fields=["cancellation_requested_at"])

    execute_agent_run(run.id)

    run.refresh_from_db()
    assert run.status == "cancelled"
    assert run.steps.count() == 0


def test_cleanup_removes_expired_runs_but_keeps_audit(db, settings):
    _, version = create_agent()
    run = create_run(version)
    AgentRun.objects.filter(id=run.id).update(created_at=timezone.now() - timedelta(days=91))

    deleted = cleanup_expired_agent_runs()

    assert deleted == 1
    assert not AgentRun.objects.filter(id=run.id).exists()