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#!/usr/bin/env python

"""Implementation of Lempel-Ziv complexity algorithm as described in:

    **Lounis C., Peysakhovich V., Causse M. (2020).**  
    *Lempel-Ziv Complexity of dwell sequences: visual scanning pattern differences between novice and expert aircraft pilots.*  
    Proceedings of the 1st International Workshop on Eye-Tracking in Aviation (ETAVI'20, 61-68).  
    [https://doi.org/10.3929/ethz-b-000407653](https://doi.org/10.3929/ethz-b-000407653)
"""

__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

from lempel_ziv_complexity import lempel_ziv_complexity

@dataclass
class AOIScanPathAnalyzer(GazeFeatures.AOIScanPathAnalyzer):

    def __post_init__(self):

        super().__init__()

        self.__lempel_ziv_complexity = 0

    def analyze(self, aoi_scan_path: GazeFeatures.AOIScanPathType):
        """Analyze aoi scan path."""

        assert(len(aoi_scan_path) > 1)

        self.__lempel_ziv_complexity = lempel_ziv_complexity(aoi_scan_path.letter_sequence)

    @property
    def lempel_ziv_complexity(self) -> int:
        
        return self.__lempel_ziv_complexity