"""Profile-review failures expose reason and whether the provider was billed.

Run from backend/: python tests/test_profile_review_errors.py
No live provider calls.
"""
from __future__ import annotations

import os
import sys
import tempfile
from pathlib import Path
from unittest.mock import patch

import httpx

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT))

os.environ["KANSHO_DB_PATH"] = str(Path(tempfile.gettempdir()) / "kansho-profile-review-errors-test.sqlite")
os.environ["KANSHO_FAKE_PROVIDER"] = "1"
os.environ["KANSHO_FAKE_DETECT"] = "1"
Path(os.environ["KANSHO_DB_PATH"]).unlink(missing_ok=True)

from fastapi.testclient import TestClient
from engine import EngineError
from main import app
from privacy_gateway import public_cost_report
from providers import ProviderConfig, complete_chat, provider_error_diagnostics


def expect(ok: bool, message: str) -> None:
    if not ok:
        raise SystemExit(f"FAIL: {message}")
    print(f"OK  {message}")


def header(token: str) -> dict:
    return {"X-Auth-Token": token}


def _openrouter() -> ProviderConfig:
    return ProviderConfig(
        role="generate",
        name="openrouter",
        mode="http",
        url="https://openrouter.ai/api/v1/chat/completions",
        model="openai/gpt-4o",
        key="sk-test",
        local=False,
        zdr=True,
        no_train=True,
    )


def main() -> None:
    none = public_cost_report({})
    expect(none["billed"] == "no", "empty diagnostics are unbilled")
    expect("keine Kosten entstanden" in none["note"], "empty diagnostics say no provider call")

    detect_only = public_cost_report(
        {"detect_calls": 2, "detect_cost": 0.0012, "generate_called": False, "generate_requested": False}
    )
    expect(detect_only["billed"] == "yes", "detect cost counts as billed")
    expect("Detect" in detect_only["note"] and "Generate nicht" in detect_only["note"], "detect-only note names both stages")

    sent = public_cost_report(
        {"detect_calls": 1, "detect_cost": 0.0004, "generate_requested": True, "generate_called": False}
    )
    expect(sent["billed"] == "yes", "known detect cost stays billed if generate is unknown")
    expect("Generate-Aufruf gesendet" in sent["note"], "unknown generate request is explicit")

    unknown = public_cost_report({"generate_requested": True, "generate_called": False})
    expect(unknown["billed"] == "unknown", "generate request without any usage is unknown")

    known = public_cost_report(
        {"detect_calls": 1, "detect_cost": 0.0004, "generate_called": True, "cost": 0.021}
    )
    expect(known["billed"] == "yes", "generate usage is billed")
    expect(abs((known["total_cost"] or 0) - 0.0214) < 1e-9, "total adds detect and generate")

    parsed = provider_error_diagnostics(
        402,
        '{"error":{"message":"Insufficient credits","code":402},"usage":{"cost":0.0}}',
    )
    expect(parsed["http_status"] == 402, "provider diagnostics keep HTTP status")
    expect(parsed["provider_message"] == "Insufficient credits", "provider message is copied")
    expect(parsed.get("cost") == 0.0, "error usage cost is kept")

    class Reject:
        status_code = 402
        text = '{"error":{"message":"Insufficient credits","code":402}}'

        def json(self):
            return {"error": {"message": "Insufficient credits", "code": 402}}

    try:
        with patch("providers.httpx.post", lambda *args, **kwargs: Reject()):
            complete_chat(_openrouter(), [{"role": "user", "content": "x"}], timeout=5)
        raise SystemExit("FAIL: rejected complete_chat should raise")
    except Exception as exc:
        expect(getattr(exc, "code", "") == "provider_rejected", "credit reject is provider_rejected")
        expect("HTTP 402" in str(exc), "reject message includes HTTP status")
        expect("Insufficient credits" in str(exc), "reject message includes provider reason")
        expect(exc.diagnostics.get("generate_requested") is True, "reject marks generate as requested")

    def boom(*args, **kwargs):
        raise httpx.TimeoutException("timed out")

    try:
        with patch("providers.httpx.post", boom):
            complete_chat(_openrouter(), [{"role": "user", "content": "x"}], timeout=12)
        raise SystemExit("FAIL: timeout should raise")
    except Exception as exc:
        expect(getattr(exc, "code", "") == "provider_timeout", "timeout is distinct from unreachable")
        expect("12 Sekunden" in str(exc), "timeout names the limit")

    with TestClient(app) as client:
        setup = client.post(
            "/api/auth/setup",
            json={"email": "lars@example.test", "name": "Lars", "password": "test-pass"},
        )
        expect(setup.status_code == 200, f"setup {setup.text}")
        token = setup.json()["token"]
        headers = header(token)
        imported = client.post(
            "/api/journal/writing-profile/import",
            headers=headers,
            json={"body": "Heute Kirschen am Markt, später der Hafen, und abends nur zwei knappe Zeilen."},
        )
        expect(imported.status_code == 200, f"import {imported.text}")

        rejected = EngineError(
            "provider_rejected",
            "generate-Provider hat die Anfrage abgelehnt (HTTP 402): Insufficient credits",
            502,
            diagnostics={
                "http_status": 402,
                "provider_message": "Insufficient credits",
                "generate_requested": True,
                "generate_called": False,
                "detect_calls": 1,
                "detect_cost": 0.0015,
            },
        )
        with patch("engine.execute_prompt", side_effect=rejected):
            response = client.post("/api/journal/writing-profile/initial-build/api", headers=headers)
        expect(response.status_code == 502, f"rejected review status {response.text}")
        detail = response.json()["detail"]
        expect(detail["code"] == "provider_rejected", "API keeps provider code")
        expect("Insufficient credits" in detail["message"], "API message keeps provider reason")
        expect(detail["cost_report"]["billed"] == "yes", "detect cost is reported as billed")
        expect("Detect" in detail["cost_report"]["note"], "cost note mentions detect")
        expect(detail["cost_report"]["generate_requested"] is True, "generate was requested")
        expect(detail["cost_report"]["generate_called"] is False, "generate did not complete")

        invalid = {
            "content": "kein json",
            "diagnostics": {
                "generate_called": True,
                "generate_requested": True,
                "cost": 0.033,
                "detect_calls": 1,
                "detect_cost": 0.002,
            },
            "trace": {"generate_called": True, "purpose": "profile_review"},
        }
        with patch("engine.execute_prompt", return_value=invalid):
            response = client.post("/api/journal/writing-profile/review/api", headers=headers)
        expect(response.status_code == 400, f"invalid result status {response.text}")
        detail = response.json()["detail"]
        expect(detail["code"] == "invalid_review_result", "parse failure keeps store code")
        expect("JSON" in detail["message"] or "json" in detail["message"].lower(), "parse failure explains JSON")
        expect(detail["cost_report"]["billed"] == "yes", "successful generate before parse failure is billed")
        expect(detail["cost_report"]["generate_called"] is True, "parse failure still records generate")
        expect(abs((detail["cost_report"]["cost"] or 0) - 0.033) < 1e-9, "generate cost survives parse failure")

    print("ALL TESTS PASSED")


if __name__ == "__main__":
    main()