from __future__ import annotations

import pytest
from fastapi.testclient import TestClient

from chat.app import app
from chat.db.connection import open_db
from chat.eventlog.log import append_event
from chat.eventlog.projector import project


@pytest.fixture
def client(tmp_path, monkeypatch):
    cfg = tmp_path / "config.toml"
    cfg.write_text('featherless_api_key = "test"\n')
    monkeypatch.setenv("CHAT_CONFIG_PATH", str(cfg))
    db = tmp_path / "test.db"
    monkeypatch.setenv("CHAT_DB_PATH", str(db))
    with TestClient(app) as c:
        if hasattr(app.state, "background_worker"):
            app.state.background_worker.enabled = False
        yield c


def test_root_redirects_to_settings_when_no_you(client):
    response = client.get("/", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/settings"


def test_chats_redirects_to_settings_when_no_you(client):
    response = client.get("/chats", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/settings"


def test_redirects_to_bots_new_when_you_exists_but_no_bots(client, tmp_path):
    with open_db(tmp_path / "test.db") as conn:
        append_event(
            conn,
            kind="you_authored",
            payload={
                "name": "Me",
                "pronouns": "they/them",
                "persona": "engineer",
            },
        )
        project(conn)
    response = client.get("/chats", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/bots/new"


def test_root_redirects_to_bots_new_when_you_exists_but_no_bots(client, tmp_path):
    with open_db(tmp_path / "test.db") as conn:
        append_event(
            conn,
            kind="you_authored",
            payload={
                "name": "Me",
                "pronouns": "they/them",
                "persona": "engineer",
            },
        )
        project(conn)
    response = client.get("/", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/bots/new"


def test_no_redirect_when_setup_complete(client, tmp_path):
    with open_db(tmp_path / "test.db") as conn:
        append_event(
            conn,
            kind="you_authored",
            payload={
                "name": "Me",
                "pronouns": "they/them",
                "persona": "engineer",
            },
        )
        append_event(
            conn,
            kind="bot_authored",
            payload={
                "id": "bot_a",
                "name": "BotA",
                "persona": "...",
                "voice_samples": [],
                "traits": [],
                "backstory": "",
                "initial_relationship_to_you": "",
                "kickoff_prose": "",
            },
        )
        project(conn)
    response = client.get("/chats", follow_redirects=False)
    # /chats page renders normally (200) instead of redirecting.
    assert response.status_code == 200


def test_settings_page_accessible_without_you(client):
    """Don't redirect FROM /settings — user needs to fill it out."""
    response = client.get("/settings", follow_redirects=False)
    assert response.status_code == 200


def test_bots_new_accessible_without_redirect(client, tmp_path):
    with open_db(tmp_path / "test.db") as conn:
        append_event(
            conn,
            kind="you_authored",
            payload={"name": "Me", "pronouns": "", "persona": ""},
        )
        project(conn)
    response = client.get("/bots/new", follow_redirects=False)
    assert response.status_code == 200


def test_bots_list_accessible_without_redirect_when_empty(client, tmp_path):
    """The bot list page itself should never redirect — even when empty."""
    with open_db(tmp_path / "test.db") as conn:
        append_event(
            conn,
            kind="you_authored",
            payload={"name": "Me", "pronouns": "", "persona": ""},
        )
        project(conn)
    response = client.get("/bots", follow_redirects=False)
    assert response.status_code == 200


def test_post_to_settings_not_redirected(client):
    """POST should bypass middleware — it's a write, not a landing nav."""
    response = client.post(
        "/settings",
        data={"name": "Me", "pronouns": "", "persona": ""},
        follow_redirects=False,
    )
    # Settings POST returns 200 with the saved page (no HTTPException raised).
    assert response.status_code == 200


def test_health_endpoint_not_redirected(client):
    response = client.get("/health", follow_redirects=False)
    assert response.status_code == 200