'use strict'
const diff = require('deep-object-diff')        ;       // thank you matt phillip.
const util = require('util')                    ;

diffMe  (       ':nothing::'
        ,       [       {ONE_1: 'one one', ONE_2: 'one two' }   , {TWO_1: 'two one', TWO_2: 'two two'}  ]
        ,       [       {ONE_1: 'one one', ONE_2: 'one two'}    , {TWO_1: 'two one', TWO_2: 'two two'}  ]
        );

diffMe  (       ':edited::'
        ,       [       {ONE_1: 'one one', ONE_2: 'one two' }   , {TWO_1: 'two one', TWO_2: 'two two'}          ]
        ,       [       {ONE_1: 'one one', ONE_2: 'one two'}    , {TWO_1: 'two one', TWO_2: 'two two edited!'}  ]
        );

diffMe  (       ':deleted::'
        ,       [       {ONE_1: 'one one', ONE_2: 'one two' }   , {TWO_1: 'two one', TWO_2: 'two two'}  ]
        ,       [       {ONE_1: 'one one', ONE_2: 'one two'}    , {TWO_1: 'two one'             }       ]
        );

diffMe  (       ':deleted!!::'
        ,       [       {ONE_1: 'one one', ONE_2: 'one two' }   , {TWO_1: 'two one', TWO_2: 'two two'}  ]
        ,       [       {ONE_1: 'one one', ONE_2: 'one two'}                                            ]
        );

diffMe  (       ':added::'
        ,       [       {ONE_1: 'one one', ONE_2: 'one two' }   , {TWO_1: 'two one', TWO_2: 'two two'}                                  ]
        ,       [       {ONE_1: 'one one', ONE_2: 'one two'}    , {TWO_1: 'two one', TWO_2: 'two two!', TWO_3:'two three added!'}       ]
        );


function diffMe(title, lhs, rhs)        {
        console.log("\n" + title);
        displayObject(0, title, diff(lhs, rhs)  )       ;
}

function displayObject(level, title, object)    {
        if  ( typeof object === 'object'        )       {
                for ( var key in object )       {
                        displayObject(level + 1, key, object[key]       );
                }
        } else {
                console.log(' '.repeat(level * 4) + 'level: ' + level + '  title: ' + title  +  '  value: ' + object    );
        }
}