#!/usr/bin/env python

"""Basic analysis module.
"""

__author__ = "Théo de la Hogue"
__credits__ = []
__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
__license__ = "BSD"

from dataclasses import dataclass

from argaze import GazeFeatures, DataFeatures

import numpy

@dataclass
class ScanPathAnalyzer(GazeFeatures.ScanPathAnalyzer):
    """Basic scan path analysis."""

    def __post_init__(self):

        super().__init__()

        self.__path_duration = 0
        self.__steps_number = 0
        self.__step_fixation_durations_average = 0

    @DataFeatures.PipelineStep
    def analyze(self, scan_path: GazeFeatures.ScanPathType):

        self.__path_duration = scan_path.duration

        self.__steps_number = len(scan_path)

        sum_fixation_durations = 0

        # DEBUG
        a = 1 / 0

        for scan_step in scan_path:

            sum_fixation_durations += scan_step.fixation_duration

        self.__step_fixation_durations_average = sum_fixation_durations / self.__steps_number

    @property
    def path_duration(self) -> float:
        """Scan path duration."""

        return self.__path_duration

    @property
    def steps_number(self) -> float:
        """Scan path steps number."""

        return self.__steps_number

    @property
    def step_fixation_durations_average(self) -> float:
        """Scan path step fixation durations average."""

        return self.__step_fixation_durations_average
    
@dataclass
class AOIScanPathAnalyzer(GazeFeatures.AOIScanPathAnalyzer):
    """Basic AOI scan path analysis."""

    def __post_init__(self):

        super().__init__()

        self.__path_duration = 0
        self.__steps_number = 0
        self.__step_fixation_durations_average = 0

    @DataFeatures.PipelineStep
    def analyze(self, aoi_scan_path: GazeFeatures.ScanPathType):

        self.__path_duration = aoi_scan_path.duration

        self.__steps_number = len(aoi_scan_path)

        sum_fixation_durations = 0
        self.__sum_aoi_fixation_durations = {}

        for aoi_scan_step in aoi_scan_path:

            sum_fixation_durations += aoi_scan_step.fixation_duration

            try:

                self.__sum_aoi_fixation_durations[aoi_scan_step.aoi] = self.__sum_aoi_fixation_durations[aoi_scan_step.aoi] + aoi_scan_step.fixation_duration

            except KeyError:

                self.__sum_aoi_fixation_durations[aoi_scan_step.aoi] = aoi_scan_step.fixation_duration

        self.__step_fixation_durations_average = sum_fixation_durations / self.__steps_number

        self.__aoi_fixation_distribution = {}

        for aoi_name, sum_aoi_fixation_duration in self.__sum_aoi_fixation_durations.items():

            self.__aoi_fixation_distribution[aoi_name] = sum_aoi_fixation_duration / sum_fixation_durations
        
    @property
    def path_duration(self) -> float:
        """AOI scan path duration."""

        return self.__path_duration

    @property
    def steps_number(self) -> float:
        """AOI scan path steps number."""

        return self.__steps_number

    @property
    def step_fixation_durations_average(self) -> float:
        """AOI scan path step fixation durations average."""

        return self.__step_fixation_durations_average

    @property
    def aoi_fixation_distribution(self) -> dict:
        """percentage of time spent on each AOI."""

        return self.__aoi_fixation_distribution