{% macro decl_units(meta) %}

{%- for u in meta.getunits ~%}
  {%- if u.object is instanceof('\\mtgMetaStruct') -%}
  {{ _self.decl_struct(u.object) }}
  {%- elseif u.object is instanceof('\\mtgMetaEnum') -%}
  {{ _self.decl_enum(u.object) }}
  {%- elseif u.object is instanceof('\\mtgMetaRPC') -%}
  {{ _self.decl_rpc(u.object) }}
  {%- endif ~%}
{%- endfor ~%}

{%- for ai in get_all_accessor_interfaces(meta) ~%}
  {{ _self.decl_accessor_interface(ai) }}
{%- endfor ~%}

{% endmacro %}

{% macro decl_struct(o, extra = '') %}
  {%- if o.parent and has_token(o, 'POD') -%}
  {{Error("@POD structs can't have a parent: " ~ o.name)}}
  {%- endif -%}
  {%- if o.parent and has_token(o, 'bitfields') -%}
  {{Error("@bitfields structs can't have a parent: " ~ o.name)}}
  {%- endif -%}

{{_self.attributes(o)}}
public {{_self.struct_type(o)}} {{o.name}} {{_self.base_struct_class(o)}} 
{
  {{_self.decl_struct_fields(o)}}

  public {{o.parent ? 'new'}} const uint STATIC_CLASS_ID = {{o.classid}};

  public {{_self.override(o)}} uint CLASS_ID() 
  {
    return {{o.classid}}; 
  }

  {{_self.comment_POD_begin(o)}}
  public {{o.name}}()
  {
    reset();
  }
  {{_self.comment_POD_end(o)}}

  public {{_self.override(o)}} void reset() 
  {
    {{_self.struct_fields_reset(o)}}
  }

  {{_self.comment_non_cloneable_begin(o)}}
  public {{_self.virtual_clone(o)}} void copy(IMetaStruct other)
  {
    copyFrom(({{o.name}})other);
  }

  public void copyFrom({{o.name}} other)
  {
    var ctx = Meta.PrepareForClone(ref other);
    ctx.factory = AutogenBundle.createById;
    ctx.reader.BeginContainer();
    reset();
    syncFields(ctx);
    ctx.reader.EndContainer();
{%- if has_token(o, 'bitfields') ~%} 
    fields_mask = other.fields_mask;
{%- endif ~%}
  }

  public {{_self.virtual_clone(o)}} IMetaStruct clone()
  {
    var copy = new {{o.name}}();
    copy.copy(this);
    return copy;
  }
  {{_self.comment_non_cloneable_end(o)}}

  public {{_self.override(o)}} void syncFields(MetaSyncContext ctx) 
  {
    {{_self.sync_fields(o)}}
  }
  
  public {{_self.override(o)}} int getFieldsCount() 
  {
    return {{fields_count(o)}};
  }
  
  public {{_self.override(o)}} int getWritableFieldsCount() 
  {
{%~ if has_token(o, 'bitfields') ~%}
    return fields_mask.GetDirtyFieldsCount() + Meta.MASK_HEADER_FIELDS_COUNT;
{% else %}
    return {{fields_count(o)}};
{%- endif ~%}
  }

{%- if has_token(o, 'bitfields') ~%}
  {{_self.bitmask_helpers(o)}}
{%- endif -%}
  
{%- if has_token(o, 'id') ~%}
  public ulong getPrimaryId() 
  {
    return (ulong){{token(o, 'id')}};
  }
{%- endif -%}

{%- if has_token(o, 'diffable') ~%}
  {{_self.diffable_support(o)}}
{%- endif -%}

  {{_self.decl_struct_accessor_implements(o)}}

  {{extra}}
}

{% endmacro %}

{%- macro decl_struct_fields(o) -%}
{%- if has_token(o, 'bitfields') ~%}
public FieldsMask fields_mask;
{%- endif -%}
{%- for f in o.fields ~%}
{{_self.decl_struct_field(o, f)}}
{%- endfor -%}
{%- endmacro -%}

{%- macro decl_struct_field(o, f) -%}
{{_self.attributes(f)}}
public {{f.type|cs_type|obscure_type(f)}} {{f.name}} {% if not has_token(o, 'POD') -%} {{_self.decl_init_value(f.type)}} {%- endif -%};
{%- endmacro -%}

{% macro decl_init_value(type) %}
{%- if type is instanceof('\\mtgBuiltinType') -%}
{%- if type.isstring -%} = ""{%- endif -%}
{%- else -%}
= new {{type|cs_type}}()
{%- endif -%}
{% endmacro %}

{% macro struct_fields_reset(o) %}
{%- if o.parent ~%} 
base.reset();
{%- endif -%}
{%- for f in o.fields ~%}
{{var_reset(f.name, f.type, token_or(f, 'default', null))}}
{%- endfor -%}
{%- if has_token(o, 'bitfields') ~%} 
ResetFieldMask();
{%- endif -%}
{% endmacro %}

{%- macro attributes(o) %}
{%- if has_token(o, 'cs_attributes') -%} 
{%- for attr in token(o, 'cs_attributes')|split(',') -%} 
[{{attr}}]
{%- endfor -%} 
{%- endif -%}
{%- endmacro %}

{%- macro struct_type(o) -%}
{{has_token(o, 'POD') ? 'struct' : 'class'}}
{%- endmacro -%}

{%- macro base_struct_class(o) -%}
{%- if has_token(o, 'POD') -%} 
: IMetaStruct
{%- else -%}
: {{o.parent ? o.parent.name : 'BaseMetaStruct'}}
{{- has_token(o, 'cloneable') and not o.parent ? ', IMetaCloneable' -}}
{%- endif -%}
{%- for ai in get_accessor_interfaces(o) -%} 
, {{ai.interfacename}}
{%- endfor -%} 
{%- endmacro -%}

{%- macro override(o) -%}
{%- if not has_token(o, 'POD') -%} 
override
{%- endif -%}
{%- endmacro -%}

{%- macro virtual(o) -%}
{%- if not has_token(o, 'POD') -%} 
{{o.parent ? 'override' : 'virtual'}}
{%- endif -%}
{%- endmacro -%}

{%- macro comment_POD_begin(o) -%}
{%- if has_token(o, 'POD') -%} 
/* commented in POD
{%- endif -%}
{%- endmacro -%}

{%- macro comment_POD_end(o) -%}
{%- if has_token(o, 'POD') -%} 
*/
{%- endif -%}
{%- endmacro -%}

{%- macro comment_non_cloneable_begin(o) -%}
{%- if not has_token(o, 'cloneable') -%} 
/* commented in non-cloneable
{%- endif -%}
{%- endmacro -%}

{%- macro comment_non_cloneable_end(o) -%}
{%- if not has_token(o, 'cloneable') -%} 
*/
{%- endif -%}
{%- endmacro -%}

{%- macro virtual_clone(o) -%}
{%- if has_token(o, 'cloneable') -%} 
  {%- if has_token(o, 'POD') -%} 
  {%- elseif o.parent and has_token_in_parent(o.parent, 'cloneable') -%} 
    override
  {%- else -%}
    virtual
  {%- endif -%}
{%- endif -%}
{%- endmacro -%}

{%- macro sync_fields(o) -%}
{%- if has_token(o, 'bitfields') ~%}
var bitctx = new Meta.BitfieldsContext(ctx, fields_mask);
bitctx.SyncMaskHeader();
{%- endif -%}
{%- if o.parent ~%} 
base.syncFields(ctx);
{%- endif -%}
{%- for f in o.fields ~%}
{{var_sync(f.name, f.type, 'ctx', f.tokens, get_sync_opts(o, 'bitctx'))}}
{%- endfor -%}
{%- endmacro -%}

{%- macro bitmask_helpers(o) ~%}

  public void ResetFieldMask()
  {
    fields_mask = FieldsMask.MakeClean(fields_amount: {{fields_count(o)}});
  }

  public void SetPrimaryFieldsChanged()
  {
{%- for f in o.fields ~%}
{%- if is_primary_field(o, f) ~%}
    Meta.SetFieldDirty(ref fields_mask, {{loop.index0}});
{%- endif -%}
{%- endfor ~%}
  }

  public void SetDirtyMask()
  {
    fields_mask = FieldsMask.MakeDirty(fields_amount: {{fields_count(o)}});
  }

  public void SetDirtyMaskDeep()
  {
    SetDirtyMask();
{%- for f in o.fields ~%}
{%- if f.type is instanceof('\\mtgMetaStruct') and has_token(f.type, 'bitfields') ~%}
    {{f.name}}.SetDirtyMaskDeep();
{%- elseif f.type is instanceof('\\mtgArrType') and f.type.value is instanceof('\\mtgMetaStruct') and has_token(f.type.value, "bitfields") ~%}
    {
      for(int i=0;i<{{f.name}}.Count;++i) 
      {
        var __tmp = {{f.name}}[i];
        __tmp.SetDirtyMaskDeep();
        {{f.name}}[i] = __tmp;
      }
    }
{%- endif -%}
{%- endfor ~%}
  }

{%- endmacro -%}

{% macro decl_enum(o) %}
{{_self.attributes(o)}}
public enum {{o.name}}
{
{%- for n,v in o.values ~%}
  {{n}} = {{v}},
{%- endfor ~%}
}
{% endmacro %}

{% macro decl_rpc(o) %}

{{_self.decl_struct(o.req)}}
{{_self.decl_struct(o.rsp)}}

public class {{o.name}} : IRpc
{
  public IRpcError error = null;
  public {{o.req.name}} req = new {{o.req.name}}();
  public {{o.rsp.name}} rsp = new {{o.rsp.name}}();

  public int getCode() 
  {
    return {{o.code}};
  }

  public void setError(IRpcError error)
  {
    this.error = error;
  }

  public IRpcError getError()
  {
    return error;
  }

  public IMetaStruct getRequest()
  {
    return req as IMetaStruct;
  }

  public IMetaStruct getResponse()
  {
    return rsp as IMetaStruct;
  }
}

{% endmacro %}

{%- macro diffable_support(o) -%}

    public bool GetDiff({{o.name}} old, {{o.name}} diff = null, List<DataClassIds> removed = null)
    {
      if(diff != null) 
        diff.reset();
      bool no_changes = true;

    {% set field_idx = -1 %}
    {%- for f in o.fields ~%}
      {% set field_idx = field_idx + 1 %}
      
      {%- if not has_token(f, 'nodiff') -%}
      {{_self.field_diff(f, field_idx)}}
      {%- endif -%}
    {% endfor %}

     return !no_changes;
    }
    
    {% for u in get_diff_related_units(o) %}
    {{_self.diff_methods_for(u)}}
    {% endfor %}

    static public List<ulong> GetClassRemovedIds(List<DataClassIds> removed_ids, uint class_id) 
    {
      if(removed_ids == null)
        return null;
      DataClassIds res;
      if(!FindClassRemovedIds(removed_ids, class_id, out res))
      {
        res = new DataClassIds();
        res.class_id = class_id;
        res.ids = new List<ulong>();
        removed_ids.Add(res);
      }
      return res.ids;
    }

    static bool FindClassRemovedIds(List<DataClassIds> removed_ids, uint class_id, out DataClassIds res)
    {
      for(int i=0;i<removed_ids.Count;++i)
      {
        if(removed_ids[i].class_id == class_id)
        {
          res = removed_ids[i];
          return true;
        }
      }
      res = default(DataClassIds);
      return false;
    }

{% endmacro %}

{%- macro diff_methods_for(u) -%}

  static public bool DiffOne(ref {{u.name}} curr, {{u.name}} old)
  {
    return !{{_self.compare_func_name(u)}}(ref curr, old);
  }

  static public bool DiffCollection(List<{{u.name}}> items, List<{{u.name}}> old_items, List<{{u.name}}> changed, List<DataClassIds> removed)
  {
    bool has_diff = false;
    if(changed != null)
      changed.Clear();

    SortByPrimaryId(ref items);
    SortByPrimaryId(ref old_items);

    int i = 0;
    int old_i = 0;
    for(; i < items.Count && old_i < old_items.Count;)
    {
      var old = old_items[old_i];
      var item = items[i];

      if(old.getPrimaryId() < item.getPrimaryId())
      {
        var removed_ids = GetClassRemovedIds(removed, {{u.name}}.STATIC_CLASS_ID);
        if(removed_ids != null)
          removed_ids.Add(old.getPrimaryId());
        old_i++;
        has_diff = true;
      }
      else if(old.getPrimaryId() > item.getPrimaryId())
      {
        item.SetDirtyMask();
        if(changed != null)
          changed.Add(item);
        i++;
        has_diff = true;
      }
      else
      {
        if(!{{_self.compare_func_name(u)}}(ref item, old))
        {
          if(changed != null)
            changed.Add(item);
          has_diff = true;
        }

        i++;
        old_i++;
      }
    }

    //items leftovers are considered changed
    for(; i < items.Count; i++)
    {
      var item = items[i];
      item.SetDirtyMask();
      if(changed != null)
        changed.Add(item);
      has_diff = true;
    }

    //old items leftovers are considered removed
    for(; old_i < old_items.Count; old_i++)
    {
      var removed_ids = GetClassRemovedIds(removed, {{u.name}}.STATIC_CLASS_ID);
      if(removed_ids != null)
        removed_ids.Add(old_items[old_i].getPrimaryId());
      has_diff = true;
    }

    //if(changed.Count > 0)
    //  Meta.LogDebug("Changed in collection {{u.name}}");
    //if(removed_ids.Count > 0)
    //  Meta.LogDebug("Removed in collection {{u.name}}");

    return has_diff;
  }

  class {{u.name}}Compare : IComparer<{{u.name}}>
  {
    public int Compare({{u.name}} o1, {{u.name}} o2)
    { 
      var id1 = o1.getPrimaryId();
      var id2 = o2.getPrimaryId();
      if(id1 == id2)
        return 0;
      return id1 > id2 ? 1 : -1;
    }
  }

  static {{u.name}}Compare {{u.name}}_compare = new {{u.name}}Compare();

  static void SortByPrimaryId(ref List<{{u.name}}> list)
  {
    list.Sort({{u.name}}_compare); 
  }

  public static bool {{_self.compare_func_name(u)}}(ref {{u.name}} a, {{u.name}} b)
  {
    bool is_equal = true;

  {%- if has_token(u, 'bitfields') ~%}
    a.ResetFieldMask();
  {%- endif -%}

  {%- for f in u.fields ~%}
  {{_self.field_compare(u, f, loop.index0)}}
  {%- endfor -%}

  {%- if has_token(u, 'bitfields') ~%}
    if(!is_equal)
      a.SetPrimaryFieldsChanged();
  {%- endif -%}

    return is_equal;
  }

{% endmacro %}

{% macro compare_func_name(o) %}
{{has_token(o, 'bitfields')?'CompareAndMarkFields':'IsEqual'}}
{%- endmacro %}

{%- macro field_compare(o, f, field_idx) -%}

  {% if f.type is instanceof('\\mtgArrType') ~%}
    if(a.{{f.name}} == null || 
       b.{{f.name}} == null || 
       a.{{f.name}}.Count != b.{{f.name}}.Count) 
      return false;

    for(int i=0;i<a.{{f.name}}.Count;++i) 
    {
      {%- if f.type.value is instanceof('\\mtgMetaStruct') ~%}
        if(!IsEqual(ref a.{{f.name}}[i], b.{{f.name}}[i])) 
          return false;
      {%- else -%}
        if(a.{{f.name}}[i] != b.{{f.name}}[i]) 
          return false;
      {%- endif -%}
    }
  {% elseif f.type is instanceof('\\mtgMetaStruct') ~%}
    if(!IsEqual(ref a.{{f.name}}, b.{{f.name}})) 
      return false;
  {% elseif f.type is instanceof('\\mtgBuiltinType') and f.type.isstring ~%}
      if((a.{{f.name}} == null ? "" : a.{{f.name}}) 
      != (b.{{f.name}} == null ? "" : b.{{f.name}}))
      {% if has_token(o, 'bitfields') ~%}
      {
        Meta.SetFieldDirty(ref a.fields_mask, {{field_idx}});
        is_equal = false;
      }
      {% else ~%}
        return false;
      {%- endif -%}
  {% else ~%}
      if(a.{{f.name}} != b.{{f.name}})
      {% if has_token(o, 'bitfields') ~%}
      {
        Meta.SetFieldDirty(ref a.fields_mask, {{field_idx}});
        is_equal = false;
      }
      {% else ~%}
        return false;
      {%- endif -%}
  {%- endif -%}

{% endmacro %}

{%- macro field_diff(f, field_idx) -%}

{% if f.type is instanceof('\\mtgMetaStruct') %}
  {%- if not has_token(f.type, 'POD') -%}
    Error("Diffable struct '" ~ f.type ~ "' must be POD");
  {%- endif -%}

  {
    var __tmp = {{f.name}};
    if(DiffOne(ref __tmp, old.{{f.name}})) 
    { 
      no_changes &= false; 
      if(diff != null) 
      { 
        diff.{{f.name}} = __tmp; 
        Meta.SetFieldDirty(ref diff.fields_mask, {{field_idx}}); 
      } 
    }
  }
{% elseif f.type is instanceof('\\mtgArrType') %}
  {%- if not has_token(f.type.value, 'POD') -%}
    Error("Diffable struct '" ~ f.type.value ~ "' must be POD");
  {%- endif -%}

  if(DiffCollection({{f.name}}, old.{{f.name}}, 
      diff == null ? null : diff.{{f.name}}, 
      removed
     )) 
  { 
    no_changes &= false; 
    if(diff != null) 
      Meta.SetFieldDirty(ref diff.fields_mask, {{field_idx}}); 
  }
{% elseif f.type is instanceof('\\mtgBuiltinType') %}
  if(diff != null) 
    diff.{{f.name}} = {{f.name}};

  if({{f.name}} != old.{{f.name}}) 
  { 
    no_changes &= false; 
    if(diff != null) 
      Meta.SetFieldDirty(ref diff.fields_mask, {{field_idx}}); 
  }
{% else %}
    Error("Diff for field '"~ f.name ~"' is not supported");
{% endif %}

{% endmacro %}

{% macro decl_accessor_interface(ai) ~%}
public interface {{ai.interfacename}}
{
  {%- for aif in ai.fields ~%}
  {% if aif.is_accessor -%}
  {{aif.field.type|cs_type}} Get{{aif.camelfieldname}}();
  void Set{{aif.camelfieldname}}({{aif.field.type|cs_type}} v);
  {% endif -%}

  {%- if aif.is_propget -%}
  {{aif.field.type|cs_type}} {{aif.camelfieldname}} {
  {%- if aif.is_propget -%}
    get;
  {%- endif %}
  {%- if aif.is_propset -%}
    set;
  {%- endif -%}
  }
  {%- endif ~%}
  {%- endfor ~%}
}
{% endmacro %}

{%- macro decl_struct_accessor_implements(o) -%}
{%- for ai in get_accessor_interfaces(o) ~%}
{%- for aif in ai.fields ~%}
{% if aif.is_accessor %}
  public {{aif.field.type|cs_type}} Get{{aif.camelfieldname}}()
  {
    return {{aif.field.name}};
  }
  public void Set{{aif.camelfieldname}}({{aif.field.type|cs_type}} v)
  {
    this.{{aif.field.name}} = v;
  }
{% endif %}

{% if aif.is_propget or aif.is_propset %}
  public {{aif.field.type|cs_type}} {{aif.camelfieldname}} {
  {%- if aif.is_propget -%}
    get => this.{{aif.field.name}};
  {%- endif -%}
  {%- if aif.is_propset -%}
    set => this.{{aif.field.name}} = value;
  {%- endif -%}
  }
{%- endif ~%}
{% endfor %}
{%- endfor ~%}
{% endmacro %}