import json

import pytest

from app.core.datasource_defaults import DEFAULT_DATASOURCES
from app.services.collectors.registry import collector_registry
from app.services import earth_boundaries


def write_geojson(path, name="Test"):
    path.write_text(
        json.dumps(
            {
                "type": "FeatureCollection",
                "features": [
                    {
                        "type": "Feature",
                        "properties": {"name": name},
                        "geometry": {
                            "type": "Polygon",
                            "coordinates": [[[-1, -1], [1, -1], [1, 1], [-1, 1], [-1, -1]]],
                        },
                    }
                ],
            }
        ),
        encoding="utf-8",
    )


def patch_paths(monkeypatch, tmp_path):
    repo = tmp_path
    source_dir = repo / "data/earth-boundary-sources"
    boundary_dir = repo / "frontend/public/earth/data/boundaries/v1"
    pmtiles = repo / "frontend/public/earth/data/boundaries/earth-boundaries-china-pov-v1.pmtiles"
    legacy = repo / "frontend/public/earth/data/countries-admin0.min.geojson"
    config = repo / "config/earth-boundary-sources.local.json"
    example = repo / "config/earth-boundary-sources.example.json"
    policy = repo / "config/earth-boundary-pov-policy.china-v1.json"
    for path in (source_dir, boundary_dir, pmtiles.parent, legacy.parent, config.parent):
        path.mkdir(parents=True, exist_ok=True)
    policy.write_text('{"productionTileFormat":"pmtiles+mvt"}\n', encoding="utf-8")
    example.write_text('{"collectorConfigs":{}}\n', encoding="utf-8")
    monkeypatch.setattr(earth_boundaries, "REPO_ROOT", repo)
    monkeypatch.setattr(earth_boundaries, "SOURCE_OUTPUT_DIR", source_dir)
    monkeypatch.setattr(earth_boundaries, "SOURCE_MANIFEST_PATH", source_dir / "manifest.json")
    monkeypatch.setattr(earth_boundaries, "BUILD_RESULT_PATH", source_dir / "build-result.json")
    monkeypatch.setattr(earth_boundaries, "BUILD_JOB_PATH", source_dir / "build-job.json")
    monkeypatch.setattr(earth_boundaries, "BOUNDARY_OUTPUT_DIR", boundary_dir)
    monkeypatch.setattr(earth_boundaries, "BOUNDARY_MANIFEST_PATH", boundary_dir / "manifest.json")
    monkeypatch.setattr(earth_boundaries, "PMTILES_ARTIFACT_PATH", pmtiles)
    monkeypatch.setattr(earth_boundaries, "LEGACY_GEOJSON_PATH", legacy)
    monkeypatch.setattr(earth_boundaries, "LOCAL_CONFIG_PATH", config)
    monkeypatch.setattr(earth_boundaries, "EXAMPLE_CONFIG_PATH", example)
    monkeypatch.setattr(earth_boundaries, "POV_POLICY_PATH", policy)
    return {
        "repo": repo,
        "config": config,
        "legacy": legacy,
        "pmtiles": pmtiles,
        "manifest": boundary_dir / "manifest.json",
    }


def test_boundary_status_uses_legacy_provider_when_pmtiles_missing(monkeypatch, tmp_path):
    paths = patch_paths(monkeypatch, tmp_path)
    write_geojson(paths["legacy"])

    status = earth_boundaries.get_boundary_status()

    assert status["provider"] == "legacy-geojson"
    assert status["fallback_available"] is True
    assert status["high_precision_ready"] is False


def test_boundary_status_prefers_high_precision_when_manifest_and_pmtiles_exist(monkeypatch, tmp_path):
    paths = patch_paths(monkeypatch, tmp_path)
    write_geojson(paths["legacy"])
    paths["pmtiles"].write_bytes(b"pmtiles")
    paths["manifest"].write_text('{"tileProvider":"pmtiles-mvt"}\n', encoding="utf-8")

    status = earth_boundaries.get_boundary_status()

    assert status["provider"] == "pmtiles-mvt"
    assert status["high_precision_ready"] is True


def test_save_boundary_config_writes_local_config(monkeypatch, tmp_path):
    paths = patch_paths(monkeypatch, tmp_path)
    payload = {"collectorConfigs": {"earth_admin0_boundaries": {"endpoint": "file:///tmp/a.geojson"}}}

    status = earth_boundaries.save_boundary_config(payload)

    assert paths["config"].exists()
    assert status["config_source"] == "local"
    assert status["config"] == payload


@pytest.mark.asyncio
async def test_build_reports_missing_tools_after_source_artifacts(monkeypatch, tmp_path):
    paths = patch_paths(monkeypatch, tmp_path)
    source_files = {}
    for source in earth_boundaries.BOUNDARY_SOURCE_KINDS:
        source_path = paths["repo"] / f"{source}.geojson"
        write_geojson(source_path, name=source)
        source_files[source] = source_path
    paths["config"].write_text(
        json.dumps(
            {
                "collectorConfigs": {
                    source: {
                        "sourceKind": kind,
                        "endpoint": str(source_files[source]),
                        "method": "GET",
                    }
                    for source, kind in earth_boundaries.BOUNDARY_SOURCE_KINDS.items()
                }
            }
        ),
        encoding="utf-8",
    )
    monkeypatch.setattr(earth_boundaries.shutil, "which", lambda _tool: None)
    progress_events = []

    status = await earth_boundaries.build_boundary_assets(
        lambda progress, phase, message, **_extra: progress_events.append((progress, phase, message))
    )

    assert status["provider"] == "geojson-high-precision"
    assert status["high_precision_ready"] is True
    assert (paths["repo"] / "data/earth-boundary-sources/manifest.json").exists()
    assert paths["manifest"].exists()
    assert any(phase == "download" for _progress, phase, _message in progress_events)


@pytest.mark.asyncio
async def test_start_boundary_build_job_records_geojson_fallback_success(monkeypatch, tmp_path):
    paths = patch_paths(monkeypatch, tmp_path)
    monkeypatch.setattr(earth_boundaries, "_build_task", None)
    monkeypatch.setattr(earth_boundaries, "_build_job_state", {})
    source_files = {}
    for source in earth_boundaries.BOUNDARY_SOURCE_KINDS:
        source_path = paths["repo"] / f"{source}.geojson"
        write_geojson(source_path, name=source)
        source_files[source] = source_path
    paths["config"].write_text(
        json.dumps(
            {
                "collectorConfigs": {
                    source: {
                        "sourceKind": kind,
                        "endpoint": str(source_files[source]),
                        "method": "GET",
                    }
                    for source, kind in earth_boundaries.BOUNDARY_SOURCE_KINDS.items()
                }
            }
        ),
        encoding="utf-8",
    )
    monkeypatch.setattr(earth_boundaries.shutil, "which", lambda _tool: None)

    response = await earth_boundaries.start_boundary_build_job()
    await earth_boundaries._build_task
    status = earth_boundaries.get_boundary_build_status()

    assert response["accepted"] is True
    assert status["job"]["status"] == "succeeded"
    assert status["job"]["result"]["provider"] == "geojson-high-precision"


def test_earth_boundary_collectors_are_not_registered_as_datasources():
    removed = set(earth_boundaries.BOUNDARY_SOURCE_KINDS) | {"earth_boundary_tiles"}

    assert removed.isdisjoint(DEFAULT_DATASOURCES)
    for source in removed:
        assert collector_registry.get(source) is None