"""
Module: test_models.py
Purpose: Test all Pydantic models and enums validate correctly.
Part of: Medical Triage Assistant — OpenEnv Round 1
Author: Team Squirrel
"""

import sys
import os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

import pytest
from models import (
    PriorityLevel,
    ActionType,
    InfoField,
    PatientRecord,
    TriageAction,
    TriageObservation,
    TriageState,
)


class TestEnums:
    """Test all enum definitions."""

    def test_priority_levels(self):
        """Verify all 4 priority levels exist and have correct values."""
        assert PriorityLevel.IMMEDIATE.value == "immediate"
        assert PriorityLevel.URGENT.value == "urgent"
        assert PriorityLevel.LESS_URGENT.value == "less_urgent"
        assert PriorityLevel.NON_URGENT.value == "non_urgent"

    def test_action_types(self):
        """Verify all 5 action types exist."""
        assert len(ActionType) == 5
        assert ActionType.ASSIGN_PRIORITY.value == "assign_priority"
        assert ActionType.REQUEST_INFO.value == "request_info"
        assert ActionType.ESCALATE.value == "escalate"
        assert ActionType.DEFER.value == "defer"
        assert ActionType.ADVANCE_QUEUE.value == "advance_queue"

    def test_info_fields(self):
        """Verify all 5 info fields exist."""
        assert len(InfoField) == 5
        assert InfoField.VITALS.value == "vitals"


class TestTriageAction:
    """Test action model validation."""

    def test_valid_assign_priority(self):
        """Test creating a valid assign_priority action."""
        action = TriageAction(
            action_type=ActionType.ASSIGN_PRIORITY,
            patient_id="P001",
            priority_level=PriorityLevel.IMMEDIATE,
        )
        assert action.action_type == ActionType.ASSIGN_PRIORITY
        assert action.patient_id == "P001"
        assert action.priority_level == PriorityLevel.IMMEDIATE

    def test_valid_request_info(self):
        """Test creating a valid request_info action."""
        action = TriageAction(
            action_type=ActionType.REQUEST_INFO,
            patient_id="P001",
            info_field=InfoField.VITALS,
        )
        assert action.action_type == ActionType.REQUEST_INFO
        assert action.info_field == InfoField.VITALS

    def test_valid_advance_queue(self):
        """Test creating a valid advance_queue action."""
        action = TriageAction(
            action_type=ActionType.ADVANCE_QUEUE,
        )
        assert action.action_type == ActionType.ADVANCE_QUEUE


class TestTriageObservation:
    """Test observation model."""

    def test_default_observation(self):
        """Test observation with default values."""
        obs = TriageObservation(done=False, reward=None)
        assert obs.done is False
        assert obs.reward is None
        assert obs.queue_length == 0

    def test_full_observation(self):
        """Test observation with all fields."""
        obs = TriageObservation(
            done=False,
            reward=0.50,
            current_patient={"patient_id": "P001", "age": 62},
            queue_length=3,
            queue_position=1,
            missing_fields=["vitals"],
            previous_action_feedback="Episode started",
            step_number=1,
            task_name="basic-triage",
        )
        assert obs.current_patient["patient_id"] == "P001"
        assert obs.queue_length == 3
        assert obs.missing_fields == ["vitals"]


class TestTriageState:
    """Test state model."""

    def test_default_state(self):
        """Test state with default values."""
        state = TriageState()
        assert state.step_count == 0
        assert state.task_name == ""
        assert state.patients == []
        assert state.assignments == {}

    def test_serializable(self):
        """Test state can be serialized to dict."""
        state = TriageState(
            task_name="basic-triage",
            patients=[{"patient_id": "P001"}],
            assignments={"P001": "immediate"},
        )
        d = state.model_dump()
        assert d["task_name"] == "basic-triage"
        assert d["assignments"]["P001"] == "immediate"