#-------------------------------------------------------------------------------
# Name:         task.py
# Purpose:
#
# Author:       Anton Vakhrushev
#
# Created:      14.03.2012
# Copyright:    (c) Anton Vakhrushev 2012
# Licence:      LGPL
#-------------------------------------------------------------------------------
#!/usr/bin/env python
# -*- coding: UTF-8 -*-

import copy
import json

#-------------------------------------------------------------------------------

class Parameter:
    def __init__(self, data):
        self.data = data

    def GetType(self):
        return self.data['type']

    def GetTitle(self):
        return self.data.get('title', '')

    def GetComment(self):
        return self.data.get('comment', '')

    def GetDefault(self):
        return self.data.get('default')

    def GetTestExpression(self):
        return self.data.get('test')

    def Test(self, value):
        return True

#-------------------------------------------------------------------------------

class DataDescription:
    def __init__(self, parent, label, data, tid):
        self.parent = parent
        self.label  = label
        self.data   = data
        self.tid    = tid

        # создание описаний параметров
        self.pdata = self.data.get('params', {})
        # заменяем текстовое описание на объект-параметр
        for label in self.pdata:
            par = Parameter(self.pdata[label])
            self.pdata[label] = par

        self.specs = []
        # рекурсивное создание описаний спецификаций
        for label, data in self.data.get('spec', {}).iteritems():
            self.specs.append(DataDescription(self, label, data, self.tid))

    def GetLabel(self):
        return self.label

    def GetTitle(self):
        return self.data.get('title', self.label)

    def GetAuthor(self):
        return self.data.get('author', 'Unknown')

    def GetId(self):
        return None

    def GetParent(self):
        return self.parent

    def GetSpecs(self):
        return self.specs

    def IsExecutable(self):
        return self.data.get('exec', True)

    def __getitem__(self, label):
        return self.pdata.get(label)

    def type(self):
        return 'data-def'

#-------------------------------------------------------------------------------

class DataDefinition:
    def __init__(self, datadescr, parent = None):
        self.DD = datadescr
        self.parent = parent
        self.params = {}
        for param in self.DD.pdata:
            self.params[param] = self.DD[param].GetDefault()
        self.job = None

    def __getitem__(self, label):
        return self.params[label]

    def __setitem__(self, label, value):
        if self.DD[label].Test(value):
            self.params[label] = value
        else:
            raise ValueError

    def Copy(self):
        res = copy.copy(self)
        res.params = copy.copy(self.params)
        res.job = None
        return res

    def PackParams(self):
        package = []
        owner = self
        while owner:
            data = {'label': owner.DD.GetLabel(), 'params': owner.params}
            package.append(data)
            owner = owner.parent
        package.reverse()
        return json.dumps(package)

    def type(self):
        return 'data-def'

#-------------------------------------------------------------------------------

class ResultData:
    def __init__(self, data):
        self.data = data

    def GetColumns(self):
        pass