import * as r from 'restructure';
import {ScriptList, FeatureList, LookupList, Coverage, ClassDef, Device} from './opentype';
import {ItemVariationStore} from './variations';

let BaseCoord = new r.VersionedStruct(r.uint16, {
  1: { // Design units only
    coordinate:   r.int16 // X or Y value, in design units
  },

  2: { // Design units plus contour point
    coordinate:     r.int16,   // X or Y value, in design units
    referenceGlyph: r.uint16,  // GlyphID of control glyph
    baseCoordPoint: r.uint16   // Index of contour point on the referenceGlyph
  },

  3: { // Design units plus Device table
    coordinate:   r.int16,                         // X or Y value, in design units
    deviceTable:  new r.Pointer(r.uint16, Device)  // Device table for X or Y value
  }
});

let BaseValues = new r.Struct({
  defaultIndex:   r.uint16,  // Index of default baseline for this script-same index in the BaseTagList
  baseCoordCount: r.uint16,
  baseCoords:     new r.Array(new r.Pointer(r.uint16, BaseCoord), 'baseCoordCount')
});

let FeatMinMaxRecord = new r.Struct({
  tag:        new r.String(4),  // 4-byte feature identification tag-must match FeatureTag in FeatureList
  minCoord:   new r.Pointer(r.uint16, BaseCoord, {type: 'parent'}), // May be NULL
  maxCoord:   new r.Pointer(r.uint16, BaseCoord, {type: 'parent'})  // May be NULL
});

let MinMax = new r.Struct({
  minCoord:           new r.Pointer(r.uint16, BaseCoord),  // May be NULL
  maxCoord:           new r.Pointer(r.uint16, BaseCoord),  // May be NULL
  featMinMaxCount:    r.uint16,                            // May be 0
  featMinMaxRecords:  new r.Array(FeatMinMaxRecord, 'featMinMaxCount') // In alphabetical order
});

let BaseLangSysRecord = new r.Struct({
  tag:    new r.String(4),  // 4-byte language system identification tag
  minMax: new r.Pointer(r.uint16, MinMax, {type: 'parent'})
});

let BaseScript = new r.Struct({
  baseValues:         new r.Pointer(r.uint16, BaseValues), // May be NULL
  defaultMinMax:      new r.Pointer(r.uint16, MinMax),     // May be NULL
  baseLangSysCount:   r.uint16,                            // May be 0
  baseLangSysRecords: new r.Array(BaseLangSysRecord, 'baseLangSysCount') // in alphabetical order by BaseLangSysTag
});

let BaseScriptRecord = new r.Struct({
  tag:      new r.String(4),  // 4-byte script identification tag
  script:   new r.Pointer(r.uint16, BaseScript, {type: 'parent'})
});

let BaseScriptList = new r.Array(BaseScriptRecord, r.uint16);

// Array of 4-byte baseline identification tags-must be in alphabetical order
let BaseTagList = new r.Array(new r.String(4), r.uint16);

let Axis = new r.Struct({
  baseTagList:    new r.Pointer(r.uint16, BaseTagList),  // May be NULL
  baseScriptList: new r.Pointer(r.uint16, BaseScriptList)
});

export default new r.VersionedStruct(r.uint32, {
  header: {
    horizAxis:    new r.Pointer(r.uint16, Axis),   // May be NULL
    vertAxis:     new r.Pointer(r.uint16, Axis)    // May be NULL
  },

  0x00010000: {},
  0x00010001: {
    itemVariationStore: new r.Pointer(r.uint32, ItemVariationStore)
  }
});