import os
import importlib
import types
import pytest
from starlette.testclient import TestClient

from code.deck_builder.summary_telemetry import _reset_metrics_for_test, record_partner_summary

fastapi = pytest.importorskip("fastapi")  # skip tests if FastAPI isn't installed


def load_app_with_env(**env: str) -> types.ModuleType:
    for key in (
        "SHOW_LOGS",
        "SHOW_DIAGNOSTICS",
        "SHOW_SETUP",
        "SHOW_COMMANDERS",
        "ENABLE_THEMES",
        "ENABLE_PWA",
        "ENABLE_PRESETS",
        "APP_VERSION",
        "THEME",
    ):
        os.environ.pop(key, None)
    for k, v in env.items():
        os.environ[k] = v
    import code.web.app as app_module
    importlib.reload(app_module)
    return app_module


def test_healthz_ok_and_request_id_header():
    app_module = load_app_with_env()
    client = TestClient(app_module.app)
    r = client.get("/healthz")
    assert r.status_code == 200
    data = r.json()
    assert data.get("status") in {"ok", "degraded"}
    assert "uptime_seconds" in data
    assert r.headers.get("X-Request-ID")


def test_404_renders_html_when_accept_html():
    app_module = load_app_with_env()
    client = TestClient(app_module.app)
    r = client.get("/this-does-not-exist", headers={"Accept": "text/html"})
    assert r.status_code == 404
    body = r.text.lower()
    assert "page not found" in body
    assert "go home" in body
    assert r.headers.get("X-Request-ID")


def test_htmx_http_exception_returns_json_with_request_id():
    app_module = load_app_with_env(SHOW_DIAGNOSTICS="1")
    client = TestClient(app_module.app)
    r = client.get("/diagnostics/trigger-error", headers={"HX-Request": "true"})
    assert r.status_code == 418
    data = r.json()
    assert data.get("error") is True
    assert data.get("status") == 418
    assert data.get("request_id")
    assert r.headers.get("X-Request-ID")


def test_unhandled_exception_returns_500_json_with_request_id():
    app_module = load_app_with_env(SHOW_DIAGNOSTICS="1")
    # Configure client to not re-raise server exceptions so we can assert the 500 response
    client = TestClient(app_module.app, raise_server_exceptions=False)
    r = client.get("/diagnostics/trigger-error?kind=unhandled", headers={"HX-Request": "true"})
    assert r.status_code == 500
    data = r.json()
    assert data.get("error") is True
    assert data.get("status") == 500
    assert data.get("request_id")
    assert r.headers.get("X-Request-ID")


def test_status_sys_summary_and_flags():
    app_module = load_app_with_env(
        SHOW_LOGS="1",
        SHOW_DIAGNOSTICS="1",
        SHOW_SETUP="1",
        SHOW_COMMANDERS="1",
        ENABLE_THEMES="1",
        ENABLE_PWA="1",
        ENABLE_PRESETS="1",
        APP_VERSION="testver",
        THEME="dark",
    )
    client = TestClient(app_module.app)
    r = client.get("/status/sys")
    assert r.status_code == 200
    data = r.json()
    assert data.get("version") == "testver"
    assert isinstance(data.get("uptime_seconds"), int)
    assert isinstance(data.get("server_time_utc"), str)
    flags = data.get("flags") or {}
    assert flags.get("SHOW_LOGS") is True
    assert flags.get("SHOW_DIAGNOSTICS") is True
    assert flags.get("SHOW_SETUP") is True
    assert flags.get("SHOW_COMMANDERS") is True
    # Theme-related flags
    assert flags.get("ENABLE_THEMES") is True
    assert flags.get("ENABLE_PWA") is True
    assert flags.get("ENABLE_PRESETS") is True
    assert flags.get("DEFAULT_THEME") == "dark"


def test_commanders_nav_hidden_when_flag_disabled():
    app_module = load_app_with_env(SHOW_COMMANDERS="0")
    client = TestClient(app_module.app)
    r = client.get("/")
    assert r.status_code == 200
    body = r.text
    assert '<a href="/commanders"' not in body


def test_commanders_nav_visible_by_default():
    app_module = load_app_with_env()
    client = TestClient(app_module.app)
    r = client.get("/")
    assert r.status_code == 200
    body = r.text
    assert '<a href="/commanders"' in body


def test_partner_metrics_endpoint_reports_color_sources():
    app_module = load_app_with_env(SHOW_DIAGNOSTICS="1")
    _reset_metrics_for_test()
    record_partner_summary(
        {
            "primary": "Tana, the Bloodsower",
            "secondary": "Nadir Kraken",
            "names": ["Tana, the Bloodsower", "Nadir Kraken"],
            "partner_mode": "partner",
            "combined": {
                "partner_mode": "partner",
                "color_identity": ["G", "U"],
                "color_code": "GU",
                "color_label": "Simic (GU)",
                "color_sources": [
                    {"color": "G", "providers": [{"name": "Tana, the Bloodsower", "role": "primary"}]},
                    {"color": "U", "providers": [{"name": "Nadir Kraken", "role": "partner"}]},
                ],
                "color_delta": {
                    "added": ["U"],
                    "removed": [],
                    "primary": ["G"],
                    "secondary": ["U"],
                },
                "secondary_role": "partner",
                "secondary_role_label": "Partner commander",
            },
        }
    )

    client = TestClient(app_module.app)
    resp = client.get("/status/partner_metrics")
    assert resp.status_code == 200
    payload = resp.json()
    assert payload.get("ok") is True
    metrics = payload.get("metrics") or {}
    assert metrics.get("total_pairs", 0) >= 1
    last = metrics.get("last_summary")
    assert last is not None
    sources = last.get("color_sources") or []
    assert any(entry.get("color") == "G" for entry in sources)
    assert any(
        provider.get("role") == "partner"
        for entry in sources
        for provider in entry.get("providers", [])
    )


def test_diagnostics_page_gated_and_visible(monkeypatch):
    monkeypatch.delenv("SHOW_DIAGNOSTICS", raising=False)
    import code.web.app as app_module
    importlib.reload(app_module)
    client = TestClient(app_module.app)
    r = client.get("/diagnostics")
    assert r.status_code == 404

    monkeypatch.setenv("SHOW_DIAGNOSTICS", "1")
    importlib.reload(app_module)
    client2 = TestClient(app_module.app)
    r2 = client2.get("/diagnostics")
    assert r2.status_code == 200
    body = r2.text
    assert "Diagnostics" in body
    assert "Combos & Synergies" in body


def test_diagnostics_combos_endpoint(tmp_path, monkeypatch):
    import json as json_mod
    monkeypatch.setenv("SHOW_DIAGNOSTICS", "1")
    importlib.reload(__import__('code.web.app', fromlist=['app']))
    import code.web.app as app_module
    importlib.reload(app_module)
    client = TestClient(app_module.app)

    def _write_json(path, obj):
        path.parent.mkdir(parents=True, exist_ok=True)
        path.write_text(json_mod.dumps(obj), encoding="utf-8")

    cpath = tmp_path / "config/card_lists/combos.json"
    spath = tmp_path / "config/card_lists/synergies.json"
    _write_json(cpath, {"list_version": "0.1.0", "pairs": [{"a": "Thassa's Oracle", "b": "Demonic Consultation", "cheap_early": True, "setup_dependent": False}]})
    _write_json(spath, {"list_version": "0.1.0", "pairs": [{"a": "Grave Pact", "b": "Phyrexian Altar"}]})
    payload = {"names": ["Thassa's Oracle", "Demonic Consultation", "Grave Pact", "Phyrexian Altar"], "combos_path": str(cpath), "synergies_path": str(spath)}
    resp = client.post("/diagnostics/combos", json=payload)
    assert resp.status_code == 200
    data = resp.json()
    assert data["counts"]["combos"] == 1
    assert data["counts"]["synergies"] == 1
    assert data["versions"]["combos"] == "0.1.0"
    c = data["combos"][0]
    assert c.get("cheap_early") is True
    assert c.get("setup_dependent") is False