var r = require('../')

var chai = require('chai')
  , expect  = chai.expect


// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
// Definition of STAT table structures

  var AxisRecord = new r.Struct({
    AxisTag:      new r.String(4),    // e.g. 'ital', 'wght'
    AxisNameID:   r.uint16,
    AxisOrdering: r.uint16,
  })
  
  var AxisValue = new r.VersionedStruct( r.uint16, {
      header: {
        AxisIndex:      r.uint16,
        Flags:          r.uint16,
        ValueNameID:    r.uint16,
      },
      1: {
        Value:          r.fixed32be, //  Fixed 16.16
      },
      2: {
        NominalValue:   r.fixed32be, //  Fixed 16.16
        RangeMinValue:  r.fixed32be, //  Fixed 16.16
        RangeMaxValue:  r.fixed32be, //  Fixed 16.16
      },
      3: {
        Value:          r.fixed32be, //  Fixed 16.16
        LinkedValue:    r.fixed32be, //  Fixed 16.16
      },
  })

  // Testing permutations of using second-level struct to handle
  // array of pointers

  var AxisValueArray
if(0){
    // Works, but array size hard-coded
    AxisValueArray = new r.Struct( {
      AxisValues: new r.Array( new r.Pointer(r.uint16, AxisValue), 6),
    })
}else if(0){
    // Fails with "Error: Not a fixed size"
    AxisValueArray = new r.Struct( {
      AxisValues: new r.Array( new r.Pointer(r.uint16, AxisValue), 'AxisValueCount'),
    })
}else{
    // Array size function sees null/empty parent argument?!?
    AxisValueArray = new r.Struct( {
      AxisValues: new r.Array( new r.Pointer(r.uint16, AxisValue), 
          function(parent){
            console.log("**D this:    %j", this)
            console.log("**D parent:  %j", parent)
            return 6
          }),
    })
        //  **D this:    {}
        //  **D parent:  {}
}  


  var structSTATTable = new r.VersionedStruct( r.uint32, {
    0x00010001: {
      DesignAxisSize:         r.uint16,
      DesignAxisCount:        r.uint16,
      OffsetToDesignAxes:     
          new r.Pointer(r.uint32, 
                  new r.Array(
                          AxisRecord, 
                          'DesignAxisCount')),
      AxisValueCount:         r.uint16,

      // Used to display the offsets in the second-level array of pointers for debugging
//    OffsetToAxisValueOffsets: 
//        new r.Pointer(r.uint32, 
//                new r.Array(
//                        r.uint16, 
//                        'AxisValueCount')),

      // Fails with "Error: Unknown version 6"
//    OffsetToAxisValueOffsets: 
//        new r.Pointer(r.uint32, 
//                new r.Array( 
//                        new r.Pointer(r.uint16, AxisValue), 
//                        6)
//        ),

      // Fails with "Error: Unknown version 6"
//    OffsetToAxisValueOffsets: 
//        new r.Pointer(r.uint32, 
//                new r.Array( 
//                        new r.Pointer(r.uint16, AxisValue), 
//                        'AxisValueCount')
//        ),

      // Works when 6 hard-coded in separate struct of array of pointers
      // Fails when separate struct tries to access 'AxisValueCount'
      OffsetToAxisValueOffsets: 
          new r.Pointer(r.uint32, AxisValueArray),


      ElidedFallbackNameID:   r.uint16,
    },
  })
  

// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
// An example Opentype font file STAT table

// This data from the test font file found at
// https://github.com/unicode-org/text-rendering-tests/blob/master/fonts/Selawik-variable.ttf

//  As dumped:
//      STAT  0xECB0D1A2      120    98924  001826C
//      TSI0  0xCC020E14     3112    99044  00182E4
//  0018260:                               0001 0001  ......... ......
//  0018270: 0008 0002 0000 0014 0006 0000 0024 0103  .............$..
//  0018280: 6974 616c 0100 0001 7767 6874 0100 0000  ital....wght....
//  0018290: 000c 0018 0024 0030 003c 0048 0001 0000  .....$.0.<.H....
//  00182a0: 0002 0103 0000 0000 0001 0001 0000 0101  ................
//  00182b0: 012c 0000 0001 0001 0000 0102 015e 0000  .,...........^..
//  00182c0: 0001 0001 0000 0103 0190 0000 0001 0001  ................
//  00182d0: 0000 0104 0258 0000 0001 0001 0000 0105  .....X..........
//  00182e0: 02bc 0000 0000 0050 0000 0000 0001 00dc  .......P........

// That dump exploded and annotated:

var inputSTATTable = [        
                              // 0000
  0x00, 0x01, 0x00, 0x01,           // 0000 Version 
  0x00, 0x08,                       // 0004 uint16  designAxisSize
  0x00, 0x02,                       // 0006 uint16  designAxisCount
  0x00, 0x00, 0x00, 0x14,           // 0008 LOffset offsetToDesignAxes
  0x00, 0x06,                       // 000C uint16  axisValueCount
  0x00, 0x00, 0x00, 0x24,           // 000E LOffset offsetToAxisValueOffsets
  0x01, 0x03,                       // 0012 uint16/NameID elidedFallbackNameID
                              // 0014         designAxes[2]
  0x69, 0x74, 0x61, 0x6c,           // 0000 [0] Tag     axisTag       'ital'
  0x01, 0x00,                       // 0004 [0] uint16  axisNameID
  0x00, 0x01,                       // 0006 [0] uint16  axisOrdering
  0x77, 0x67, 0x68, 0x74,           // 0008 [1] Tag     axisTag       'wght'
  0x01, 0x00,                       // 000C [1] uint16  axisNameID
  0x00, 0x00,                       // 000E [1] uint16  axisOrdering
                              // 0024         Offset  axisValueOffsets[6]
  0x00, 0x0c,                       // 0000   axisValueOffsets[0]
  0x00, 0x18,                       // 0002   axisValueOffsets[1]
  0x00, 0x24,                       // 0004   axisValueOffsets[2]
  0x00, 0x30,                       // 0006   axisValueOffsets[3]
  0x00, 0x3c,                       // 0008   axisValueOffsets[4]
  0x00, 0x48,                       // 000A   axisValueOffsets[5]
                              // 0030  000C   axisValue[0]
  0x00, 0x01,                       // 0000     uint16  format
  0x00, 0x00,                       // 0002     uint16  axisIndex
  0x00, 0x02,                       // 0004     uint16  flags
  0x01, 0x03,                       // 0006     uint16  valueNameID
  0x00, 0x00, 0x00, 0x00,           // 0008     Fixed(16.16)  value  0.0
                              // 003C  0018   axisValue[1]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x01,                       // 0006     uint16  valueNameID  
  0x01, 0x2c, 0x00, 0x00,           // 0008     Fixed(16.16)  value  300.0
                              // 0048  0024   axisValue[2]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x02,                       // 0006     uint16  valueNameID  
  0x01, 0x5e, 0x00, 0x00,           // 0008     Fixed(16.16)  value  350.0
                              // 0054  0030   axisValue[3]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x03,                       // 0006     uint16  valueNameID  
  0x01, 0x90, 0x00, 0x00,           // 0008     Fixed(16.16)  value  400.0
                              // 0060  003C   axisValue[4]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x04,                       // 0006     uint16  valueNameID  
  0x02, 0x58, 0x00, 0x00,           // 0008     Fixed(16.16)  value  600.0
                              // 006C  0048   axisValue[5]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x05,                       // 0006     uint16  valueNameID  
  0x02, 0xbc, 0x00, 0x00            // 0008     Fixed(16.16)  value  700.0
];                                  // 0078

// The object as expected from successful parsing of above data

var expectedSTATTable = {
    "version":            0x00010001,   // s.b. "Version" or "majorVersion"/"minorVersion"
    "DesignAxisSize":     8,
    "DesignAxisCount":    2,
    "OffsetToDesignAxes": [ 
        { "AxisTag":      'ital',       // 'ital'   1769234796
          "AxisNameID":   256,
          "AxisOrdering": 1
        },
        { "AxisTag":      'wght',       // 'wght'   2003265652
          "AxisNameID":   256,
          "AxisOrdering": 0
        }
    ],
    "AxisValueCount":     6,
    "OffsetToAxisValueOffsets": { 
      "AxisValues": [
        { "version":      1,            // s.b. "Format"
          "AxisIndex":    0,
          "Flags":        2,
          "ValueNameID":  259,
          "Value":        0         //    0.0   0
        },
        { "version":      1,
          "AxisIndex":    1,
          "Flags":        0,
          "ValueNameID":  257,
          "Value":        300.0     //  300.0   19660800
        },
        { "version":      1,
          "AxisIndex":    1,
          "Flags":        0,
          "ValueNameID":  258,
          "Value":        350.0     //  350.0   22937600
        },
        { "version":      1,
          "AxisIndex":    1,
          "Flags":        0,
          "ValueNameID":  259,
          "Value":        400.0     //  400.0   26214400
        },
        { "version":      1,
          "AxisIndex":    1,
          "Flags":        0,
          "ValueNameID":  260,
          "Value":        600.0     //  600.0   39321600
        },
        { "version":      1,
          "AxisIndex":    1,
          "Flags":        0,
          "ValueNameID":  261,
          "Value":        700.0     //  700.0   45875200
        }
      ]
    },
    "ElidedFallbackNameID": 259
}


// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -

// Isolated axisValueOffsets and axisValues[]

var inputSTATAxisValuesOffsetsArray = [        
                              // 0000
  0x00, 0x0c,                       // 0000   axisValueOffsets[0]
  0x00, 0x18,                       // 0002   axisValueOffsets[1]
  0x00, 0x24,                       // 0004   axisValueOffsets[2]
  0x00, 0x30,                       // 0006   axisValueOffsets[3]
  0x00, 0x3c,                       // 0008   axisValueOffsets[4]
  0x00, 0x48,                       // 000A   axisValueOffsets[5]
                              // 000C         axisValue[0]
  0x00, 0x01,                       // 0000     uint16  format
  0x00, 0x00,                       // 0002     uint16  axisIndex
  0x00, 0x02,                       // 0004     uint16  flags
  0x01, 0x03,                       // 0006     uint16  valueNameID
  0x00, 0x00, 0x00, 0x00,           // 0008     Fixed(16.16)  value  0.0
                              // 0018         axisValue[1]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x01,                       // 0006     uint16  valueNameID  
  0x01, 0x2c, 0x00, 0x00,           // 0008     Fixed(16.16)  value  300.0
                              // 0024         axisValue[2]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x02,                       // 0006     uint16  valueNameID  
  0x01, 0x5e, 0x00, 0x00,           // 0008     Fixed(16.16)  value  350.0
                              // 0030         axisValue[3]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x03,                       // 0006     uint16  valueNameID  
  0x01, 0x90, 0x00, 0x00,           // 0008     Fixed(16.16)  value  400.0
                              // 003C         axisValue[4]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x04,                       // 0006     uint16  valueNameID  
  0x02, 0x58, 0x00, 0x00,           // 0008     Fixed(16.16)  value  600.0
                              // 0048         axisValue[5]
  0x00, 0x01,                       // 0000     uint16  format        
  0x00, 0x01,                       // 0002     uint16  axisIndex   
  0x00, 0x00,                       // 0004     uint16  flags
  0x01, 0x05,                       // 0006     uint16  valueNameID  
  0x02, 0xbc, 0x00, 0x00            // 0008     Fixed(16.16)  value  700.0
];                                  // 0078


// The object as expected from successful parsing of above data

var expectedSTATAxisValuesArray = {
  "AxisValues":                           [
    { "version":      1,
      "AxisIndex":    0,
      "Flags":        2,
      "ValueNameID":  259,
      "Value":        0             //    0.0   0
    },
    { "version":      1,
      "AxisIndex":    1,
      "Flags":        0,
      "ValueNameID":  257,
      "Value":        300.0         //  300.0   19660800
    },
    { "version":      1,
      "AxisIndex":    1,
      "Flags":        0,
      "ValueNameID":  258,
      "Value":        350.0         //  350.0   22937600
    },
    { "version":      1,
      "AxisIndex":    1,
      "Flags":        0,
      "ValueNameID":  259,
      "Value":        400.0         //  400.0   26214400
    },
    { "version":      1,
      "AxisIndex":    1,
      "Flags":        0,
      "ValueNameID":  260,
      "Value":        600.0         //  600.0   39321600
    },
    { "version":      1,
      "AxisIndex":    1,
      "Flags":        0,
      "ValueNameID":  261,
      "Value":        700.0         //  700.0   45875200
    }
  ]
}

// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -

describe('Check VersionedStruct usage - text with STAT Table sample', function(){


// -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -

if(0){
  // Test parsing internal data AxisValues array

  describe('STAT AxisValues offsets and array', function(){

    var stream = new r.DecodeStream(new Buffer(inputSTATAxisValuesOffsetsArray))
    var result = AxisValueArray.decode(stream)
    
    //console.log('    decoded AxisValues: %j', result)

    it('decode result matches expected data', function(){
      expect(result).is.deep.equal(expectedSTATAxisValuesArray)
    })

  })
}


  // Test parsing entire AxisValues array

  describe('STAT Table data', function(){

    var stream = new r.DecodeStream(new Buffer(inputSTATTable))
    var result = structSTATTable.decode(stream)
    
    //console.log('    decoded STAT table: %j', result)

    it('decode result matches expected data', function(){
      expect(result).is.deep.equal(expectedSTATTable)
    })

  })

})

/*
*/

// vim:ts=2:et:sw=2:sidescroll=2:ft=javascript