# *******************************************************************************
# Honeybee OpenStudio Gem, Copyright (c) 2020, Alliance for Sustainable
# Energy, LLC, Ladybug Tools LLC and other contributors. All rights reserved.
#
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# this list of conditions and the following disclaimer in the documentation
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND ANY CONTRIBUTORS
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# *******************************************************************************

require 'honeybee/extension'
require 'honeybee/model_object'

module Honeybee
  class Model
    attr_reader :errors, :warnings, :hash

    # Read Ladybug Energy Model JSON from disk
    def self.read_from_disk(file)
      hash = nil
      File.open(File.join(file), 'r') do |f|
        hash = JSON.parse(File.read(f, :external_encoding => 'UTF-8',
          :internal_encoding => 'UTF-8'), symbolize_names: true, encoding: 'UTF-8')
      end
      Model.new(hash)
    end

    # Load ModelObject from symbolized hash
    def initialize(hash)
      # initialize class variable @@extension only once
      @@extension ||= Extension.new
      @@schema ||= @@extension.schema
      @@standards ||= @@extension.standards
      $simple_window_cons = false

      @hash = hash
      @type = @hash[:type]
      raise 'Unknown model type' if @type.nil?
      raise "Incorrect model type '#{@type}'" unless @type == 'Model'

      if @hash[:version].nil?
        @hash[:version] = @@schema[:info][:version]
      end
    end

    # check if the model is valid
    def valid?
      if Gem.loaded_specs.has_key?("json-schema")
        return validation_errors.empty?
      else
        return true
      end
    end

    # return detailed model validation errors
    def validation_errors
      if Gem.loaded_specs.has_key?("json-schema")
        require 'json-schema'
        JSON::Validator.fully_validate(@@schema, @hash, :fragment => "#/components/schemas/Model")
      end
    end

    def defaults
      @@schema[:components][:schemas][:ModelEnergyProperties][:properties]
    end

  end # Model
end # Honeybee