"""Unit tests for normalization/merger.py."""

from __future__ import annotations

from confidence.engine import ConfidenceEngine
from confidence.conflicts import ConflictDetector
from models.providers import ProviderCapability
from normalization.merger import ReportMerger
from providers.base import ProviderResult


def _make_result(provider: str, capability: ProviderCapability,
                 normalized: dict, success: bool = True) -> ProviderResult:
    return ProviderResult(
        provider=provider,
        capability=capability,
        success=success,
        elapsed_ms=10.0,
        normalized=normalized,
    )


class TestReportMerger:
    def test_merge_empty_results(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        report = merger.merge({}, "hash", "job-id", 100.0, "detection")
        assert report.metadata.image_hash == "hash"
        assert report.metadata.job_id == "job-id"
        assert report.metadata.total_elapsed_ms == 100.0
        assert report.detections == []
        assert report.matches == []
        assert report.evidence == []
        assert report.conflicts == []

    def test_merge_detection_results(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "haar": _make_result(
                "haar", ProviderCapability.DETECTION,
                {"boxes": [{"x": 10, "y": 20, "w": 100, "h": 120}],
                 "confidences": [0.95], "landmarks": None, "num_faces": 1},
            ),
        }
        report = merger.merge(results, "hash", "job-id", 50.0, "detection")
        assert len(report.detections) == 1
        assert report.detections[0].box == {"x": 10, "y": 20, "w": 100, "h": 120}
        assert "haar" in report.detections[0].detected_by
        assert report.detections[0].confidence.overall > 0.0
        assert len(report.evidence) == 1
        assert report.evidence[0].provider == "haar"

    def test_merge_preserves_failed_results_as_evidence(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "dnn": ProviderResult(
                provider="dnn", capability=ProviderCapability.DETECTION,
                success=False, elapsed_ms=5.0, error="model not loaded",
                error_type="RuntimeError",
            ),
        }
        report = merger.merge(results, "hash", "job-id", 5.0, "detection")
        # Failed provider shouldn't contribute detections
        assert report.detections == []
        # But should be preserved as evidence
        assert len(report.evidence) == 1
        assert report.evidence[0].success is False
        assert report.evidence[0].error == "model not loaded"
        assert "dnn" in report.metadata.providers_failed

    def test_merge_image_analysis_results(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "image_quality": _make_result(
                "image_quality", ProviderCapability.IMAGE_ANALYSIS,
                {"quality_score": 0.85, "brightness": 128.0, "contrast": 50.0,
                 "sharpness": 200.0, "noise_level": 5.0, "width": 200, "height": 200,
                 "channels": 3, "color_profile": "BGR", "dominant_colors": ["#ff0000"]},
            ),
        }
        report = merger.merge(results, "hash", "job-id", 30.0, "image_analysis")
        assert len(report.image_analyses) == 1
        assert report.image_analyses[0].provider == "image_quality"
        assert report.image_analyses[0].quality_score == 0.85
        assert report.image_analyses[0].confidence is not None

    def test_merge_metadata_results(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "exif": _make_result(
                "exif", ProviderCapability.METADATA,
                {"format": "JPEG", "exif": {"Make": "Canon"}, "camera_make": "Canon"},
            ),
        }
        report = merger.merge(results, "hash", "job-id", 20.0, "metadata")
        assert len(report.metadata_extractions) == 1
        assert report.metadata_extractions[0].format == "JPEG"
        assert report.metadata_extractions[0].camera_make == "Canon"

    def test_merge_forensics_results(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "image_integrity": _make_result(
                "image_integrity", ProviderCapability.FORENSICS,
                {"integrity_score": 0.95, "manipulation_indicators": [],
                 "details": {"sha256": "abc123"}},
            ),
        }
        report = merger.merge(results, "hash", "job-id", 15.0, "forensics")
        assert len(report.forensics) == 1
        assert report.forensics[0].integrity_score == 0.95

    def test_merge_collects_limitations(self):
        engine = ConfidenceEngine()
        cd = ConflictDetector()
        merger = ReportMerger(engine, cd)
        results = {
            "dnn": ProviderResult(
                provider="dnn", capability=ProviderCapability.DETECTION,
                success=False, elapsed_ms=5.0, error="model not loaded",
            ),
        }
        report = merger.merge(results, "hash", "job-id", 5.0, "detection")
        assert any("dnn" in lim for lim in report.metadata.limitations)