import sys

from PIL import Image
from fastapi.testclient import TestClient

from server import services
from server.app import app
from server.config import SETTINGS
from server.models import ClickTextAction


def _auth_headers() -> dict:
    token = SETTINGS.get("token", "")
    if not token:
        return {}
    return {"x-clickthrough-token": token}


def test_extract_ocr_items_normalization(monkeypatch):
    class FakeOutput:
        DICT = "DICT"

    class FakeTesseract:
        Output = FakeOutput

        @staticmethod
        def image_to_data(_image, lang, config, output_type):
            assert lang == "eng"
            assert output_type == "DICT"
            return {
                "text": ["hello", " ", "world"],
                "conf": ["95.0", "-1", "62.5"],
                "left": [10, 12, 40],
                "top": [20, 25, 60],
                "width": [30, 10, 50],
                "height": [10, 10, 12],
            }

    monkeypatch.setitem(sys.modules, "pytesseract", FakeTesseract)
    items = services.extract_ocr_items(Image.new("RGB", (100, 100)), origin_x=100, origin_y=200, min_confidence=60, lang="eng", psm=None)
    assert len(items) == 2
    assert items[0]["text"] == "hello"
    assert items[0]["bbox"]["x"] == 110
    assert items[0]["center"]["y"] == 225
    assert items[1]["text"] == "world"


def test_resolve_text_match_contains_exact_regex_and_nth():
    items = [
        {"text": "Save", "confidence": 70},
        {"text": "Save as", "confidence": 96},
        {"text": "SAVE", "confidence": 88},
    ]
    contains = services._resolve_text_match(ClickTextAction(text="save", match="contains", occurrence="first"), items)
    assert contains["text"] == "Save"
    best = services._resolve_text_match(ClickTextAction(text="save", match="contains", occurrence="best"), items)
    assert best["text"] == "Save as"
    exact_case = services._resolve_text_match(
        ClickTextAction(text="SAVE", match="exact", case_sensitive=True, occurrence="first"),
        items,
    )
    assert exact_case["text"] == "SAVE"
    regex_nth = services._resolve_text_match(ClickTextAction(text="^Save", match="regex", occurrence="nth", nth=2), items)
    assert regex_nth["text"] == "Save as"


def test_interact_click_text_region_optional(monkeypatch):
    monkeypatch.setattr(services, "select_display", lambda screen: ({"screen": screen}, [], {"requested": screen, "selected": screen, "fallback": False}))
    monkeypatch.setattr(
        services,
        "capture_region_image",
        lambda screen, x, y, w, h: (Image.new("RGB", (20, 20)), {"x": x or 0, "y": y or 0, "width": w or 20, "height": h or 20}, {}, [], {}),
    )
    monkeypatch.setattr(
        services,
        "extract_ocr_items",
        lambda *args, **kwargs: [
            {
                "text": "Apply",
                "confidence": 93.0,
                "bbox": {"x": 10, "y": 20, "width": 20, "height": 10},
                "center": {"x": 20, "y": 25},
                "region_relative_bbox": {"x": 10, "y": 20, "width": 20, "height": 10},
            }
        ],
    )

    client = TestClient(app)
    response = client.post(
        "/interact",
        json={"screen": 0, "action": {"action": "click_text", "dry_run": True, "click_text": {"text": "Apply", "match": "contains"}}},
        headers=_auth_headers(),
    )
    assert response.status_code == 200
    body = response.json()["data"]
    assert body["resolved_target"]["x"] == 20
    assert body["click_text_match"]["matched"]["text"] == "Apply"


def test_see_ocr_off_on_contract(monkeypatch):
    monkeypatch.setattr(
        "server.app.capture_region_image",
        lambda *args, **kwargs: (Image.new("RGB", (10, 10)), {"x": 0, "y": 0, "width": 10, "height": 10}, {"screen": 0}, [], {}),
    )
    monkeypatch.setattr("server.app.encode_image", lambda *args, **kwargs: "abc")
    monkeypatch.setattr("server.app.extract_ocr_items", lambda *args, **kwargs: [{"text": "x"}])

    client = TestClient(app)
    off = client.post("/see", json={"ocr": False, "with_grid": False}, headers=_auth_headers())
    assert off.status_code == 200
    assert "ocr" not in off.json()["data"]["meta"]
    on = client.post("/see", json={"ocr": True, "with_grid": False}, headers=_auth_headers())
    assert on.status_code == 200
    assert on.json()["data"]["meta"]["ocr"][0]["text"] == "x"