import uuid
from datetime import datetime, timezone

import pytest
from sqlalchemy import select

from app.models.contact_session import ContactSession
from app.models.entity import Entity
from app.models.entity_sighting import EntitySighting
from app.models.user import User


def _make_entity(name="Vesper Wren", rarity="rare", signature="abc123def4567890"):
    return Entity(
        name=name,
        epithet="the Static Widow",
        persona="A voice worn smooth as sea glass.",
        rarity_tier=rarity,
        signature=signature,
        voice_profile={"voice_id": "lessac", "pitch": -2, "rate": 0.95, "noise": 0.04},
        visual_profile={"hue": 265, "form": "wisp"},
        sample_quotes=["I am closer than the dial suggests."],
        contact_count=3,
    )


@pytest.mark.asyncio
async def test_codex_lists_entities(client, db_session):
    db_session.add(_make_entity())
    db_session.add(_make_entity("Hollow Briar", "common", "0123456789abcdef"))
    await db_session.commit()

    response = await client.get("/api/codex")
    assert response.status_code == 200
    names = {entity["name"] for entity in response.json()["entities"]}
    assert names == {"Vesper Wren", "Hollow Briar"}


@pytest.mark.asyncio
async def test_codex_filters_by_rarity(client, db_session):
    db_session.add(_make_entity())
    db_session.add(_make_entity("Hollow Briar", "common", "0123456789abcdef"))
    await db_session.commit()

    response = await client.get("/api/codex?rarity=rare")
    assert response.status_code == 200
    entities = response.json()["entities"]
    assert len(entities) == 1
    assert entities[0]["name"] == "Vesper Wren"


@pytest.mark.asyncio
async def test_codex_detail_and_404(client, db_session):
    entity = _make_entity()
    db_session.add(entity)
    await db_session.commit()
    await db_session.refresh(entity)

    response = await client.get(f"/api/codex/{entity.id}")
    assert response.status_code == 200
    body = response.json()
    assert body["name"] == "Vesper Wren"
    assert body["persona"].startswith("A voice")
    assert body["sightings"] == 0

    missing = await client.get(f"/api/codex/{uuid.uuid4()}")
    assert missing.status_code == 404


@pytest.mark.asyncio
async def test_stats_counts_veil_activity(client, db_session):
    db_session.add(_make_entity())
    await db_session.commit()

    response = await client.get("/api/stats")
    assert response.status_code == 200
    body = response.json()
    assert body["entities"] == 1
    assert body["sessions"] == 0
    assert body["utterances"] == 0
    assert body["anomalies"] == 0


@pytest.mark.asyncio
async def test_codex_is_public_without_auth(client):
    assert (await client.get("/api/codex")).status_code == 200
    assert (await client.get("/api/stats")).status_code == 200


# --- the encounter record: who summoned a spirit, and who else has met it ---
# (hunter-profiles wave). The data already existed — every contact is an
# EntitySighting row, discovery is Entity.discovered_by.


async def _hunter(db_session, username: str, **profile):
    """A hunter. `profile` fields (display_name, profile_public, …) are set
    only if the parallel profile migration has landed, so these tests pass
    either way."""
    user = User(username=username, password_hash="x")
    for key, value in profile.items():
        if hasattr(User, key):
            setattr(user, key, value)
    db_session.add(user)
    await db_session.flush()
    return user


async def _contact(db_session, entity, user, seen_at):
    session = ContactSession(user_id=user.id, entity_id=entity.id, mode="wire")
    db_session.add(session)
    await db_session.flush()
    db_session.add(
        EntitySighting(
            entity_id=entity.id,
            session_id=session.id,
            user_id=user.id,
            seen_at=seen_at,
        )
    )


@pytest.mark.asyncio
async def test_detail_surfaces_the_discoverer(client, db_session):
    entity = _make_entity()
    db_session.add(entity)
    summoner = await _hunter(db_session, "mora", display_name="Mora Vane")
    await db_session.flush()
    entity.discovered_by = summoner.id
    await _contact(
        db_session, entity, summoner, datetime(2026, 7, 1, tzinfo=timezone.utc)
    )
    await db_session.commit()

    body = (await client.get(f"/api/codex/{entity.id}")).json()
    assert body["discovered_by"] == "mora"
    assert body["discoverer"]["username"] == "mora"
    assert body["discoverer"]["times_contacted"] == 1
    assert body["discoverer"]["last_seen"] is not None
    # Public by default, so the dossier may link to their hunter page.
    assert body["discoverer_public"] is True
    assert body["discoverer"]["display_name"] in {"mora", "Mora Vane"}


@pytest.mark.asyncio
async def test_encounter_roster_aggregates_per_hunter(client, db_session):
    entity = _make_entity()
    db_session.add(entity)
    twice = await _hunter(db_session, "reva")
    once = await _hunter(db_session, "isolde")
    await _contact(db_session, entity, twice, datetime(2026, 7, 1, tzinfo=timezone.utc))
    await _contact(db_session, entity, twice, datetime(2026, 7, 2, tzinfo=timezone.utc))
    await _contact(db_session, entity, once, datetime(2026, 7, 9, tzinfo=timezone.utc))
    await db_session.commit()

    body = (await client.get(f"/api/codex/{entity.id}")).json()
    assert body["sightings"] == 3
    # Distinct hunters, not sighting rows.
    assert body["total_encounters"] == 2
    roster = body["encounters"]
    assert [h["username"] for h in roster] == ["isolde", "reva"]  # newest first
    by_name = {h["username"]: h for h in roster}
    assert by_name["reva"]["times_contacted"] == 2
    assert by_name["isolde"]["times_contacted"] == 1
    assert by_name["reva"]["last_seen"].startswith("2026-07-02")


@pytest.mark.asyncio
async def test_private_hunters_are_counted_but_not_linkable(client, db_session):
    if not hasattr(User, "profile_public"):
        pytest.skip("profile_public lands with the profile workstream")
    entity = _make_entity()
    db_session.add(entity)
    hidden = await _hunter(db_session, "nocturne", profile_public=False)
    seen = await _hunter(db_session, "calla", profile_public=True)
    await _contact(db_session, entity, hidden, datetime(2026, 7, 3, tzinfo=timezone.utc))
    await _contact(db_session, entity, seen, datetime(2026, 7, 4, tzinfo=timezone.utc))
    await db_session.commit()

    body = (await client.get(f"/api/codex/{entity.id}")).json()
    assert body["total_encounters"] == 2
    flags = {h["username"]: h["public"] for h in body["encounters"]}
    assert flags == {"nocturne": False, "calla": True}


@pytest.mark.asyncio
async def test_unmet_spirit_has_an_empty_roster(client, db_session):
    entity = _make_entity()
    db_session.add(entity)
    await db_session.commit()
    await db_session.refresh(entity)

    body = (await client.get(f"/api/codex/{entity.id}")).json()
    assert body["encounters"] == []
    assert body["total_encounters"] == 0
    assert body["discoverer"] is None
    assert body["discoverer_public"] is False