# MdTranslator - ADIwg MdTranslator RubyGem entry point

# History:
# 	Stan Smith 2014-07-02 original script
#   Stan Smith 2014-07-21 added ADIWG namespace
#   Stan Smith 2014-07-21 added validation of json structure
#   Stan Smith 2014-07-23 moved all validations to readers/adiwg/adiwg_validator.rb
#   ... each reader will have it's own validator
#   Stan Smith 2014-09-26 added processing of minor release numbers
#   Stan Smith 2014-10-10 added method to return path to readers and writers
#   Stan Smith 2014-10-11 added methods to return content of readme files
#   Stan Smith 2014-12-01 changed adiwgJson to mdJson
#   Stan Smith 2014-12-01 added writer iso19110 (feature catalogue)
#   Stan Smith 2014-12-01 added translator version to $response
#   Stan Smith 2014-12-02 organized shared class/code/units folders for 19115-2, 19110
#   Stan Smith 2014-12-11 refactored to handle namespacing readers and writers
#   Stan Smith 2015-01-15 changed translate() to keyword parameter list
#   Stan Smith 2015-03-04 moved addFinalMessages into this module from rails app
#   Stan Smith 2015-06-22 replace global ($response) with passed in object (responseObj)
#   ... created as an instance of class ResponseHash
#   Stan Smith 2015-07-14 deleted readerFound
#   Stan Smith 2015-07-14 renamed readerVersionFound to readerVersionRequested
#   Stan Smith 2015-07-16 moved module_coordinates from mdJson reader to internal
#   Stan Smith 2015-07-17 added support for user supplied CSS for html writer

# required by readers and writers
require 'adiwg/mdtranslator/version'
require 'adiwg/mdtranslator/readers/mdReaders'
require 'adiwg/mdtranslator/writers/mdWriters'
require 'adiwg/mdtranslator/internal/internal_metadata_obj'
require 'adiwg/mdtranslator/internal/module_dateTimeFun'
require 'adiwg/mdtranslator/internal/module_geoFormat'
require 'adiwg/mdtranslator/internal/module_coordinates'
require 'adiwg/mdtranslator/internal/module_point'
require 'adiwg/mdtranslator/internal/module_lineString'

module ADIWG
    module Mdtranslator

        def self.translate(file:, reader:, validate: 'normal', writer: nil, showAllTags: false, css: nil, cssLink: nil)

            # the reader and writer specified in the translate parameter string should load and
            #     return this hash ...
            # ------------------------------------------------------------------------------------
            # readerFormat: the anticipated format of the input file, parsing by the reader will
            #     proceed assuming this format, set by reader
            # readerStructurePass: 'true' if input file structure is determined to be valid.
            #    Set by the reader.
            # readerStructureMessages: an array of quoted string messages. If readerStructurePass
            #    is false, set one or more messages to assist the user in fixing file structure
            #    problems.  Set by reader.
            # readerRequested: name of the reader requested by the user, set from  the translate
            #    parameter list
            # readerVersionRequested: version of the reader requested by the input file, set by reader
            # readerVersionUsed: version of the reader the reader method decided to use in processing
            #    the input file.  Set by the reader.  Default 'normal'.
            # readerValidationLevel: validation level requested to be applied to the input file, set
            #    from the parameter list
            # readerValidationPass: true if the input file passes the level of validation requested,
            #    set by reader
            # readerValidationMessages: an array of quoted string messages. If readerValidationPass
            #    is 'false', set one or more messages to assist user fixing file schema validation
            #    problems.  Set by reader.
            # readerExecutionPass: 'true' if the reader completes the import of the input file into
            #    the internal object without errors. set by reader.
            # readerExecutionMessages: an array of quoted string messages. If readerExecutionPass is
            #    'false', set one or more messages to assist user in fixing file data problems.
            #    Set by reader.
            # writerName: name of the writer requested by the user, set from the translate parameter
            #    list.  if nil no write was requested and only validation of the input file will
            #    be performed.
            # writerVersion: current version of the writer requested, set by writer
            # writerFormat: format of the output from the writer. Set by writer.
            # writerPass: true if the writer completes the creation of the output file without errors,
            #    set by writer
            # writerMessages: an array of quoted string messages.  If writerPass is 'false', set one
            #    or more messages to assist user in fixing file data problems.  Set by writer.
            # writerOutput: output file returned from the writer, set by writer
            # writerShowTags: include tags in XML output for empty elements
            # writerMissingIdCount: counter for creating unique elements IDs for ISO elements that did not
            #    provide IDs in the input metadata file
            # translatorVersion: current version of the mdTranslator

            responseObj =  {
                readerFormat: nil,
                readerStructurePass: nil,
                readerStructureMessages: [],
                readerRequested: nil,
                readerVersionRequested: nil,
                readerVersionUsed: nil,
                readerValidationLevel: nil,
                readerValidationPass: nil,
                readerValidationMessages: [],
                readerExecutionPass: nil,
                readerExecutionMessages: [],
                writerName: nil,
                writerVersion: nil,
                writerFormat: nil,
                writerPass: nil,
                writerMessages: [],
                writerOutput: nil,
                writerShowTags: false,
                writerMissingIdCount: '_000',
                translatorVersion: nil
            }

            paramsObj = {
                cssLink: cssLink,
                css: css
            }

            # add the passed in parameters to the response hash
            responseObj[:readerRequested] = reader
            responseObj[:readerValidationLevel] = validate
            responseObj[:writerName] = writer
            responseObj[:writerShowTags] = showAllTags

            # add mdTranslator version to response hash
            responseObj[:translatorVersion] = ADIWG::Mdtranslator::VERSION

            # handle readers
            if reader.nil? || reader == ''
                responseObj[:readerExecutionPass] = false
                responseObj[:readerExecutionMessages] << 'Reader name was not provided'
                return responseObj

            else
                intObj = ADIWG::Mdtranslator::Readers.handleReader(file, responseObj)

                # if readerValidation failed - exit
                if !responseObj[:readerValidationPass]
                    return responseObj
                end

                # if readerExecutionPass is nil no error messages were set while
                # reading the input file into the internal object.
                # the read operation is assumed to have been successful and pass is set to true.
                if responseObj[:readerExecutionPass].nil?
                    responseObj[:readerExecutionPass] = true
                elsif !responseObj[:readerExecutionPass]
                    return responseObj
                end
            end

            # handle writers
            if writer.nil? || writer == ''
                responseObj[:writerMessages] << 'Writer name was not provided.'
            else
                require File.join(File.dirname(__FILE__), 'mdtranslator/writers/mdWriters')
                ADIWG::Mdtranslator::Writers.handleWriter(intObj, responseObj, paramsObj)
            end

            return responseObj

        end

    end

end