"""TDD: /api/inbox/* endpoints.

Plan: docs/superpowers/plans/2026-06-20-cyclone-workflow-automation.md
Tasks 7-10 (T7-T10).
"""
from __future__ import annotations

from datetime import datetime, timezone

import pytest
from fastapi.testclient import TestClient

from cyclone import db
from cyclone.api import app
from cyclone.db import Batch, Claim, ClaimState, Remittance


@pytest.fixture(autouse=True)
def _setup(tmp_path, monkeypatch):
    monkeypatch.setenv("CYCLONE_DB_URL", f"sqlite:///{tmp_path}/inbox.db")
    db._reset_for_tests()
    db.init_db()
    # Initialize app state used by inbox endpoints.
    app.state.dismissed_pairs = set()
    yield


@pytest.fixture
def client():
    with TestClient(app) as c:
        yield c


def _seed_batch() -> None:
    with db.SessionLocal()() as s:
        if s.get(Batch, "B-1") is not None:
            return
        s.add(Batch(
            id="B-1", kind="837p", input_filename="x.txt",
            parsed_at=datetime.now(timezone.utc),
            totals_json={"total_claims": 1},
            validation_json={"passed": True, "warnings": [], "errors": []},
            raw_result_json={"_": "stub"},
        ))
        s.commit()


def test_lanes_endpoint_returns_four_keys(client: TestClient):
    r = client.get("/api/inbox/lanes")
    assert r.status_code == 200
    body = r.json()
    assert set(body.keys()) == {"rejected", "candidates", "unmatched", "done_today"}
    for v in body.values():
        assert isinstance(v, list)


def test_match_endpoint_links_remit_to_claim(client: TestClient):
    _seed_batch()
    with db.SessionLocal()() as s:
        s.add(Claim(id="C1", batch_id="B-1", patient_control_number="PCN-1",
                    state=ClaimState.SUBMITTED))
        s.add(Remittance(id="R1", batch_id="B-1",
                         payer_claim_control_number="PCN-1",
                         status_code="1", status_label="P",
                         total_charge=100, total_paid=0,
                         received_at=datetime.now(timezone.utc)))
        s.commit()

    r = client.post("/api/inbox/candidates/R1/match", json={"claim_id": "C1"})
    assert r.status_code == 200, r.text

    with db.SessionLocal()() as s:
        c = s.get(Claim, "C1")
        assert c.matched_remittance_id == "R1"


def test_match_409_if_claim_already_matched(client: TestClient):
    _seed_batch()
    with db.SessionLocal()() as s:
        s.add(Claim(id="C1", batch_id="B-1", patient_control_number="X",
                    state=ClaimState.SUBMITTED,
                    matched_remittance_id="R-OTHER"))
        s.add(Remittance(id="R1", batch_id="B-1",
                         payer_claim_control_number="X",
                         status_code="1", status_label="P",
                         total_charge=100, total_paid=0,
                         received_at=datetime.now(timezone.utc)))
        s.commit()

    r = client.post("/api/inbox/candidates/R1/match", json={"claim_id": "C1"})
    assert r.status_code == 409
    assert "current_state" in r.json()["detail"]


def test_dismiss_endpoint_adds_pair_to_session_set(client: TestClient):
    r = client.post(
        "/api/inbox/candidates/dismiss",
        json={"pairs": [{"claim_id": "C1", "remit_id": "R1"}]},
    )
    assert r.status_code == 200
    assert frozenset({"C1", "R1"}) in client.app.state.dismissed_pairs


def test_resubmit_moves_rejected_to_submitted_and_increments_count(client: TestClient):
    _seed_batch()
    with db.SessionLocal()() as s:
        s.add(Claim(id="C1", batch_id="B-1", patient_control_number="X",
                    state=ClaimState.REJECTED,
                    rejection_reason="old",
                    resubmit_count=2))
        s.commit()

    r = client.post("/api/inbox/rejected/resubmit", json={"claim_ids": ["C1"]})
    assert r.status_code == 200, r.text

    with db.SessionLocal()() as s:
        c = s.get(Claim, "C1")
        assert c.state == ClaimState.SUBMITTED
        assert c.rejection_reason is None
        assert c.resubmit_count == 3


def test_resubmit_returns_conflicts_for_non_rejected_claim(client: TestClient):
    """Resubmit returns 200 with a conflicts list (does NOT raise 409)."""
    _seed_batch()
    with db.SessionLocal()() as s:
        s.add(Claim(id="C1", batch_id="B-1", patient_control_number="X",
                    state=ClaimState.SUBMITTED))
        s.commit()

    r = client.post("/api/inbox/rejected/resubmit", json={"claim_ids": ["C1"]})
    assert r.status_code == 200
    body = r.json()
    assert body["resubmitted"] == []
    assert any(c["claim_id"] == "C1" for c in body["conflicts"])


def test_export_csv_streams_rows_with_csv_content_type(client: TestClient):
    r = client.get("/api/inbox/export.csv?lane=rejected")
    assert r.status_code == 200
    assert "text/csv" in r.headers["content-type"]
    body = r.text
    assert "id" in body.splitlines()[0]