import math
from typing import Annotated, Tuple

from pydantic import BaseModel, Field


class DiffractionGeometry(BaseModel):
    energy_keV: Annotated[float, Field(gt=1.0, lt=100.0)]
    dtz_mm: Annotated[float, Field(gt=10.0, lt=5000.0)]
    pixel_size_mm: Annotated[float, Field(ge=0.05, le=0.5)]
    beam_center_pxl: Tuple[float, float]
    detector_size_pxl: Tuple[int, int]
    detector_description: str
    detector_serial_number: str
    poni_rot1_rad: float
    poni_rot2_rad: float

    @property
    def detector_max_radius_pxl(self):
        x0 = self.detector_size_pxl[0] - self.beam_center_pxl[0]
        x1 = self.beam_center_pxl[0]
        y0 = self.detector_size_pxl[1] - self.beam_center_pxl[1]
        y1 = self.beam_center_pxl[1]
        return max(abs(x0), abs(x1), abs(y0), abs(y1))

    @property
    def detector_radius_mm(self):
        return self.detector_max_radius_pxl * self.pixel_size_mm

    @property
    def wavelength_angstrom(self):
        return 12.398 / self.energy_keV

    @property
    def max_resolution_angstrom(self):
        return self.resolution_angstrom(self.dtz_mm)

    def resolution_angstrom(self, exp_dtz_mm: float) -> float:
        if exp_dtz_mm <= 0:
            raise ValueError(f"Detector distance must be positive {exp_dtz_mm}")

        theta = math.atan(self.detector_radius_mm / exp_dtz_mm) * 0.5
        return self.wavelength_angstrom / (2 * math.sin(theta))

    def calc_dtz_mm(self, exp_resolution_angstrom: float) -> float:
        if exp_resolution_angstrom <= 0:
            raise ValueError("Resolution must be positive")
        x = self.wavelength_angstrom / (2 * exp_resolution_angstrom)
        if x >= 1.0 or x <= -1.0:
            return 0.0
        theta = math.asin(x)
        return self.detector_radius_mm / math.tan(2 * theta)


if __name__ == "__main__":
    from aare.daq.config import BeamlineConfig
    from aare.devices.jfjoch import JFJochWrapper
    from aarecommon.config.beamline import mx_beamline

    bl = mx_beamline()
    client = JFJochWrapper(bl)
    cfg = BeamlineConfig(bl)
    print(cfg)
    det_cfg = client.detector()
    print(det_cfg)
    print(f"pixel_size: {det_cfg.pixel_size_mm:.4f} mm")
    print(f"Detector height: {det_cfg.height:.2f} pixel")
    print(f"Detector width: {det_cfg.width:.2f} pixel")
    print(f"beam centre = ({cfg.beam_center[0]:.2f}, {cfg.beam_center[1]:.2f})")
    geom = DiffractionGeometry(
        energy_keV=12.4,
        dtz_mm=200.0,
        pixel_size_mm=det_cfg.pixel_size_mm,
        beam_center_pxl=(det_cfg.width / 2, det_cfg.height / 2),
        detector_size_pxl=(det_cfg.width, det_cfg.height),
        detector_description=det_cfg.description,
        detector_serial_number=det_cfg.serial_number,
        poni_rot1_rad=-0.001396263,
        poni_rot2_rad=-0.003839724,
    )
    print(f"geom.max_resolution_angstrom: {geom.max_resolution_angstrom:.2f} Angstrom")
    print(f"geom.calc_dtz_mm(3.9): {geom.calc_dtz_mm(3.9):.2f} mm")

    print(f"geom.resolution_angstrom(1244.42): {geom.resolution_angstrom(1244.42):.2f} Angstrom")
    print(f"geom.detector_radius_mm: {geom.detector_radius_mm:.2f} mm")