"""Tests for core/navigation/action_resolver.py — coordinate conversion + OCR adapters."""

import json
import pytest
from core.navigation.action_resolver import (
    NavigateCoords,
    NavigateResult,
    grounded_to_coords,
    make_ocr_simple_from_detailed,
    navigate_login,
)
from core.navigation.grounding import (
    CoordsCache,
    GroundedElement,
    OcrTokenInfo,
    OcrDetailedClient,
)
from core.navigation.visual_verifier import VlmClient


# ── Mock factories ─────────────────────────────────────────────────────


def mock_ocr_detailed_client_factory(tokens: list):
    def client(image_path: str) -> list:
        return tokens
    return client


def mock_vlm_client_factory(response_json: dict):
    def client(image_path: str, prompt: str) -> str:
        return json.dumps(response_json)
    return client


# ── grounded_to_coords tests ───────────────────────────────────────────


class TestGroundedToCoords:
    def test_basic_conversion(self):
        el = GroundedElement(
            role="bouton", text="Connexion",
            bbox=(200, 50, 400, 100), center=(300, 75),
            confidence=0.9, method="ocr_anchor",
        )
        coords = grounded_to_coords(el, 1920, 1080)
        assert coords.x_pct == pytest.approx(300 / 1920, abs=0.01)
        assert coords.y_pct == pytest.approx(75 / 1080, abs=0.01)
        assert coords.method == "ocr_anchor"
        assert coords.bbox_pct is not None

    def test_to_dict(self):
        coords = NavigateCoords(x_pct=0.15, y_pct=0.07, method="ocr_anchor")
        d = coords.to_dict()
        assert d["x_pct"] == 0.15
        assert d["y_pct"] == 0.07
        assert d["method"] == "ocr_anchor"

    def test_to_dict_with_bbox(self):
        coords = NavigateCoords(
            x_pct=0.15, y_pct=0.07,
            bbox_pct=(0.10, 0.05, 0.20, 0.09),
            method="vlm_grounder",
        )
        d = coords.to_dict()
        assert "bbox_pct" in d
        assert len(d["bbox_pct"]) == 4


# ── make_ocr_simple_from_detailed tests ────────────────────────────────


class TestMakeOcrSimpleFromDetailed:
    def test_conversion(self):
        tokens = [
            OcrTokenInfo(text="Login", bbox=(100, 50, 250, 90)),
            OcrTokenInfo(text="Password", bbox=(100, 100, 250, 140)),
        ]
        detailed = mock_ocr_detailed_client_factory(tokens)
        simple = make_ocr_simple_from_detailed(detailed)
        result = simple("/tmp/test.png")
        assert result == ["Login", "Password"]

    def test_empty_tokens(self):
        detailed = mock_ocr_detailed_client_factory([])
        simple = make_ocr_simple_from_detailed(detailed)
        result = simple("/tmp/test.png")
        assert result == []


# ── navigate_login tests ───────────────────────────────────────────────


class TestNavigateLogin:
    def test_full_success(self):
        """All fields grounded → NavigateResult with coords."""
        ocr = mock_ocr_detailed_client_factory([
            OcrTokenInfo(text="Login", bbox=(100, 50, 250, 90), confidence=0.95),
            OcrTokenInfo(text="Mot de passe", bbox=(100, 100, 250, 140), confidence=0.95),
            OcrTokenInfo(text="Connexion", bbox=(100, 150, 250, 190), confidence=0.95),
        ])
        vlm = mock_vlm_client_factory({
            "confirmed": [
                {"index": 1, "role_confirmed": True, "actual_role": "champ", "confidence": 0.9},
                {"index": 2, "role_confirmed": True, "actual_role": "champ", "confidence": 0.9},
                {"index": 3, "role_confirmed": True, "actual_role": "bouton", "confidence": 0.9},
            ],
            "overall_confidence": 0.9,
        })
        result = navigate_login(
            "/tmp/login.png",
            ocr_client=ocr, vlm_client=vlm,
            skip_pre_verify=True,
        )
        assert result.all_resolved == True
        assert result.login_coords is not None
        assert result.password_coords is not None
        assert result.submit_coords is not None
        assert result.submit_coords.x_pct > 0
        assert result.submit_coords.y_pct > 0

    def test_no_clients_error(self):
        """Missing OCR/VLM clients → error."""
        result = navigate_login("/tmp/login.png", ocr_client=None, vlm_client=None)
        assert result.all_resolved == False
        assert "required" in result.error

    def test_pre_verify_fail(self):
        """Pre-verify fails → early abort."""
        ocr = mock_ocr_detailed_client_factory([
            OcrTokenInfo(text="Accueil", bbox=(0, 0, 100, 40)),
        ])
        vlm = mock_vlm_client_factory({})
        result = navigate_login(
            "/tmp/page.png",
            ocr_client=ocr, vlm_client=vlm,
            skip_pre_verify=False,
        )
        assert result.all_resolved == False
        assert result.pre_verify is not None
        assert result.pre_verify.match == False

    def test_skip_pre_verify(self):
        """Skip pre-verify → proceed to grounding even if form incomplete."""
        ocr = mock_ocr_detailed_client_factory([
            OcrTokenInfo(text="Login", bbox=(100, 50, 250, 90)),
            OcrTokenInfo(text="Mot de passe", bbox=(100, 100, 250, 140)),
            OcrTokenInfo(text="Connexion", bbox=(100, 150, 250, 190)),
        ])
        vlm = mock_vlm_client_factory({})
        result = navigate_login(
            "/tmp/login.png",
            ocr_client=ocr, vlm_client=vlm,
            skip_pre_verify=True,
        )
        assert result.pre_verify is None  # skipped
        assert result.all_resolved == True


# ── NavigateResult dataclass tests ─────────────────────────────────────


class TestNavigateResult:
    def test_default(self):
        result = NavigateResult()
        assert result.all_resolved == False
        assert result.login_coords is None
        assert result.error == ""

    def test_with_coords(self):
        result = NavigateResult(
            login_coords=NavigateCoords(x_pct=0.15, y_pct=0.07, method="ocr_anchor"),
            all_resolved=True,
        )
        assert result.login_coords.x_pct == 0.15


# ── Import validation ──────────────────────────────────────────────────


class TestImportValidation:
    def test_action_resolver_imports(self):
        """Verify action_resolver module imports cleanly."""
        from core.navigation.action_resolver import (
            NavigateCoords,
            NavigateResult,
            grounded_to_coords,
            make_ocr_detailed_from_grid,
            make_ocr_simple_from_detailed,
            navigate_login,
        )
        assert NavigateCoords is not None
        assert NavigateResult is not None

    def test_navigation_package_handler(self):
        """Verify _handle_navigate_action is importable from package."""
        from core.navigation import _handle_navigate_action
        assert callable(_handle_navigate_action)

    def test_navigation_package_exports(self):
        """Verify package __all__ includes navigate exports."""
        import core.navigation as nav
        assert "navigate_login" in nav.__all__
        assert "NavigateResult" in nav.__all__
        assert "_handle_navigate_action" in nav.__all__