"""FastMCP integration tests — tool calls against the real server, HTTP mocked."""

import json
from io import BytesIO

import httpx
import respx
from fastmcp import Client
from PIL import Image as PILImage

import mcgibs.server as server_module
from mcgibs.client import GIBSClient
from mcgibs.server import mcp


async def _init_mock_client(capabilities_xml: str) -> GIBSClient:
    """Create and initialize a GIBSClient with mocked capabilities."""
    client = GIBSClient()
    await client.initialize()
    return client


@respx.mock
async def test_search_tool(capabilities_xml):
    """search_gibs_layers finds the sea ice layer by keyword."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool("search_gibs_layers", {"query": "sea ice"})
            text = result.content[0].text
            assert "AMSR2" in text
            assert "Sea Ice" in text
            # Should not match unrelated layers
            assert "Surface Air Temperature" not in text
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_get_layer_info_tool(capabilities_xml, layer_metadata_json):
    """get_layer_info returns enriched JSON for the true color layer."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )
    layer_id = "MODIS_Terra_CorrectedReflectance_TrueColor"
    respx.get(url__regex=rf".*layer-metadata.*/{layer_id}\.json").mock(
        return_value=httpx.Response(200, text=layer_metadata_json)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool("get_layer_info", {"layer_id": layer_id})
            text = result.content[0].text
            info = json.loads(text)

            assert info["identifier"] == layer_id
            assert info["instrument"] == "MODIS"
            assert info["platform"] == "Terra"
            assert info["ongoing"] is True
            assert "time" in info
            assert info["time"]["start"] == "2000-02-24"
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_resolve_place_tool(capabilities_xml):
    """resolve_place geocodes a place name via mocked Nominatim."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    nominatim_response = [
        {
            "display_name": "Tokyo, Japan",
            "lat": "35.6762",
            "lon": "139.6503",
            "boundingbox": ["35.5190", "35.8178", "138.9428", "139.9200"],
            "osm_type": "relation",
            "importance": 0.82,
        }
    ]
    respx.get(url__regex=r".*nominatim.*search.*").mock(
        return_value=httpx.Response(200, json=nominatim_response)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool("resolve_place", {"place": "Tokyo"})
            text = result.content[0].text
            data = json.loads(text)

            assert data["display_name"] == "Tokyo, Japan"
            assert abs(data["lat"] - 35.6762) < 0.01
            assert abs(data["lon"] - 139.6503) < 0.01
            assert "bbox" in data
            assert data["bbox"]["west"] < data["bbox"]["east"]
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_build_tile_url_tool(capabilities_xml):
    """build_tile_url returns a properly formatted WMTS tile URL."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool(
                "build_tile_url",
                {
                    "layer_id": "MODIS_Terra_CorrectedReflectance_TrueColor",
                    "date": "2025-06-01",
                    "zoom": 3,
                    "row": 2,
                    "col": 4,
                },
            )
            url = result.content[0].text

            assert "MODIS_Terra_CorrectedReflectance_TrueColor" in url
            assert "2025-06-01" in url
            assert "epsg4326" in url
            # True color layer uses JPEG and 250m matrix set
            assert url.endswith(".jpg")
            assert "/250m/" in url
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_list_tools(capabilities_xml):
    """All expected tools are registered on the MCP server."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            tools = await client.list_tools()
            tool_names = {t.name for t in tools}

            expected = {
                "search_gibs_layers",
                "get_layer_info",
                "list_measurements",
                "check_layer_dates",
                "get_imagery",
                "compare_dates",
                "get_imagery_composite",
                "explain_layer_colormap",
                "get_legend",
                "resolve_place",
                "build_tile_url",
            }

            for name in expected:
                assert name in tool_names, f"Missing tool: {name}"
    finally:
        await server_module._client.close()
        server_module._client = None


# ---------------------------------------------------------------------------
# Image() return type tests
# ---------------------------------------------------------------------------


def _make_fake_jpeg() -> bytes:
    """Create a tiny valid JPEG for mocking WMS responses."""
    buf = BytesIO()
    PILImage.new("RGB", (10, 10), "blue").save(buf, format="JPEG")
    return buf.getvalue()


@respx.mock
async def test_get_imagery_returns_image_content(capabilities_xml):
    """get_imagery returns TextContent + ImageContent (not raw dicts)."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )
    respx.get(url__regex=r".*wms\.cgi.*").mock(
        return_value=httpx.Response(
            200, content=_make_fake_jpeg(), headers={"content-type": "image/jpeg"}
        )
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool(
                "get_imagery",
                {
                    "layer_id": "MODIS_Terra_CorrectedReflectance_TrueColor",
                    "date": "2025-06-01",
                    "bbox": [-120.0, 30.0, -110.0, 40.0],
                },
            )
            assert len(result.content) == 2
            assert result.content[0].type == "text"
            assert "Corrected Reflectance" in result.content[0].text
            assert result.content[1].type == "image"
            assert result.content[1].mimeType == "image/jpeg"
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_get_legend_returns_image_content(capabilities_xml):
    """get_legend returns TextContent + ImageContent for layers with legends."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    fake_png = BytesIO()
    PILImage.new("RGB", (200, 20), "white").save(fake_png, format="PNG")
    respx.get(url__regex=r".*legends/.*\.png").mock(
        return_value=httpx.Response(
            200, content=fake_png.getvalue(), headers={"content-type": "image/png"}
        )
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.call_tool(
                "get_legend",
                {"layer_id": "AMSR2_Sea_Ice_Concentration_12km_Monthly"},
            )
            assert len(result.content) == 2
            assert result.content[0].type == "text"
            assert result.content[1].type == "image"
            assert result.content[1].mimeType == "image/png"
    finally:
        await server_module._client.close()
        server_module._client = None


# ---------------------------------------------------------------------------
# Dynamic resource tests
# ---------------------------------------------------------------------------


@respx.mock
async def test_list_resources(capabilities_xml):
    """Server exposes all expected resources including dynamic templates."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            templates = await client.list_resource_templates()
            template_uris = {t.uriTemplate for t in templates}

            assert "gibs://layer/{layer_id}" in template_uris
            assert "gibs://colormap/{layer_id}" in template_uris
            assert "gibs://dates/{layer_id}" in template_uris
    finally:
        await server_module._client.close()
        server_module._client = None


@respx.mock
async def test_colormap_resource(capabilities_xml, colormap_xml):
    """gibs://colormap/{layer_id} returns colormap explanation text."""
    respx.get(url__regex=r".*WMTSCapabilities\.xml").mock(
        return_value=httpx.Response(200, text=capabilities_xml)
    )
    respx.get(url__regex=r".*colormaps/v1\.3/.*\.xml").mock(
        return_value=httpx.Response(200, text=colormap_xml)
    )

    server_module._client = await _init_mock_client(capabilities_xml)
    try:
        async with Client(mcp) as client:
            result = await client.read_resource(
                "gibs://colormap/AIRS_L3_Surface_Air_Temperature_Daily_Day"
            )
            text = result[0].text
            assert "Surface Air Temperature" in text
            assert "K" in text
    finally:
        await server_module._client.close()
        server_module._client = None