"""Tests for Package 3.2 prompts router — HTTP endpoint integration tests.

Uses real sqlite3 with tmp_path. TestClient hits a minimal FastAPI app
wired with the prompts router. No mocks on the DB layer.
"""

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from app.core.sqlite_db import init_prompts_db, seed_default_profiles, _get_db
from app.routers.prompts import router


# ── Fixture ────────────────────────────────────────────────────────────────


@pytest.fixture
def client(tmp_path, monkeypatch):
    prompts_path = str(tmp_path / "prompts.db")
    monkeypatch.setenv("PROMPTS_DB_PATH", prompts_path)
    monkeypatch.setenv("HISTORY_DB_PATH", str(tmp_path / "history.db"))

    from app.core.config import get_settings
    get_settings.cache_clear()
    from app.core.dependencies import get_settings_cached
    get_settings_cached.cache_clear()

    conn = _get_db(prompts_path)
    init_prompts_db(conn)
    seed_default_profiles(conn)
    conn.close()

    test_app = FastAPI()
    test_app.include_router(router)

    yield TestClient(test_app)

    get_settings_cached.cache_clear()
    get_settings.cache_clear()


# ── GET /profiles ──────────────────────────────────────────────────────────


def test_get_profiles_returns_200_with_three_items(client):
    resp = client.get("/api/v1/prompts/profiles")
    assert resp.status_code == 200

    data = resp.json()
    assert len(data["profiles"]) == 3

    names = [p["name"] for p in data["profiles"]]
    assert names == ["A", "B", "C"]

    active_map = {p["name"]: p["is_active"] for p in data["profiles"]}
    assert active_map["A"] is True
    assert active_map["B"] is False
    assert active_map["C"] is False


# ── GET /profiles/{name} ──────────────────────────────────────────────────


def test_get_profile_prompts_a_returns_200(client):
    resp = client.get("/api/v1/prompts/profiles/A")
    assert resp.status_code == 200

    data = resp.json()
    assert data["profile_name"] == "A"
    assert set(data["prompts"].keys()) == {
        "decompose", "filter", "generate",
        "generate_per_subq", "filter_intro", "filter_section", "filter_outro",
    }


def test_get_profile_prompts_invalid_returns_400(client):
    resp = client.get("/api/v1/prompts/profiles/D")
    assert resp.status_code == 400


# ── PUT /profiles/{name}/activate ─────────────────────────────────────────


def test_activate_profile_b_then_get_confirms(client):
    resp = client.put("/api/v1/prompts/profiles/B/activate")
    assert resp.status_code == 200
    assert resp.json()["active_profile"] == "B"

    resp = client.get("/api/v1/prompts/profiles")
    active_map = {p["name"]: p["is_active"] for p in resp.json()["profiles"]}
    assert active_map["B"] is True
    assert active_map["A"] is False
    assert active_map["C"] is False


# ── PUT /profiles/{name}/{step} ───────────────────────────────────────────


def test_update_prompt_returns_200_and_persists(client):
    new_template = "Updated decompose for {question}"

    resp = client.put(
        "/api/v1/prompts/profiles/A/decompose",
        json={"template": new_template},
    )
    assert resp.status_code == 200
    assert resp.json()["step"] == "decompose"

    resp = client.get("/api/v1/prompts/profiles/A")
    assert resp.json()["prompts"]["decompose"] == new_template


# ── PUT /profiles/{name}/all ──────────────────────────────────────────────


def test_update_all_prompts_batch_returns_200_and_persists(client):
    new_prompts = {
        "decompose": "Batch decompose",
        "filter": "Batch filter",
        "generate": "Batch generate",
    }

    resp = client.put(
        "/api/v1/prompts/profiles/A/all",
        json={"prompts": new_prompts},
    )
    assert resp.status_code == 200
    assert resp.json()["profile"] == "A"

    resp = client.get("/api/v1/prompts/profiles/A")
    prompts = resp.json()["prompts"]
    assert prompts["decompose"] == "Batch decompose"
    assert prompts["filter"] == "Batch filter"
    assert prompts["generate"] == "Batch generate"


# ── PUT /profiles/{name}/reset ────────────────────────────────────────────


def test_reset_single_step_returns_200(client):
    from app.core.sqlite_db import _SEED_TEMPLATES

    client.put(
        "/api/v1/prompts/profiles/A/decompose",
        json={"template": "MODIFIED"},
    )

    resp = client.put(
        "/api/v1/prompts/profiles/A/reset",
        json={"step": "decompose"},
    )
    assert resp.status_code == 200
    assert resp.json()["reset_step"] == "decompose"

    resp = client.get("/api/v1/prompts/profiles/A")
    assert resp.json()["prompts"]["decompose"] == _SEED_TEMPLATES["decompose"]


def test_reset_all_steps_returns_200(client):
    from app.core.sqlite_db import _SEED_TEMPLATES

    client.put("/api/v1/prompts/profiles/A/all", json={"prompts": {
        "decompose": "MODIFIED decompose",
        "filter": "MODIFIED filter",
        "generate": "MODIFIED generate",
    }})

    resp = client.put(
        "/api/v1/prompts/profiles/A/reset",
        json={"step": None},
    )
    assert resp.status_code == 200
    assert resp.json()["reset_step"] == "all"

    resp = client.get("/api/v1/prompts/profiles/A")
    prompts = resp.json()["prompts"]
    assert prompts["decompose"] == _SEED_TEMPLATES["decompose"]
    assert prompts["filter"] == _SEED_TEMPLATES["filter"]
    assert prompts["generate"] == _SEED_TEMPLATES["generate"]


def test_reset_with_no_body_resets_all(client):
    from app.core.sqlite_db import _SEED_TEMPLATES

    client.put("/api/v1/prompts/profiles/A/all", json={"prompts": {
        "decompose": "MODIFIED",
        "filter": "MODIFIED",
        "generate": "MODIFIED",
    }})

    resp = client.put("/api/v1/prompts/profiles/A/reset")
    assert resp.status_code == 200
    assert resp.json()["reset_step"] == "all"

    resp = client.get("/api/v1/prompts/profiles/A")
    prompts = resp.json()["prompts"]
    assert prompts["decompose"] == _SEED_TEMPLATES["decompose"]
    assert prompts["filter"] == _SEED_TEMPLATES["filter"]
    assert prompts["generate"] == _SEED_TEMPLATES["generate"]


# ── Validation: invalid name and step ──────────────────────────────────────


def test_invalid_profile_name_returns_400(client):
    resp = client.get("/api/v1/prompts/profiles/D")
    assert resp.status_code == 400

    resp = client.put("/api/v1/prompts/profiles/D/activate")
    assert resp.status_code == 400


def test_invalid_step_returns_400(client):
    resp = client.put(
        "/api/v1/prompts/profiles/A/nonexistent",
        json={"template": "test"},
    )
    assert resp.status_code == 400