/*
 * Copyright 2019 by its authors. See AUTHORS.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Diagnostics.Contracts;
using Eina;

namespace EinaTestData
{

class BaseSequence
{
    public static byte[] Values() => new byte[3]{0x0, 0x2A, 0x42};
}

public static class BaseData
{
    public static readonly int[] base_seq_int = {0x0, 0x2A, 0x42};
    public static readonly int[] append_seq_int = {42, 43, 33};
    public static readonly int[] modified_seq_int = {0x0, 0x2A, 0x42, 42, 43, 33};

    public static readonly string[] base_seq_str = {"0x0", "0x2A", "0x42"};
    public static readonly string[] append_seq_str = {"42", "43", "33"};
    public static readonly string[] modified_seq_str = {"0x0", "0x2A", "0x42",
        "42",  "43",   "33"};

    public static readonly Eina.Stringshare[] base_seq_strshare = {"0x0", "0x2A",
        "0x42"};
    public static readonly Eina.Stringshare[] append_seq_strshare = {"42", "43",
        "33"};
    public static readonly Eina.Stringshare[] modified_seq_strshare = {
        "0x0", "0x2A", "0x42", "42", "43", "33"};

    public static Dummy.Numberwrapper NW(int n)
    {
        var nw = new Dummy.Numberwrapper();
        nw.Number = n;
        return nw;
    }

    public static Dummy.Numberwrapper[] BaseSeqObj()
    {
        var a = new Dummy.Numberwrapper();
        var b = new Dummy.Numberwrapper();
        var c = new Dummy.Numberwrapper();
        a.Number = 0x0;
        b.Number = 0x2A;
        c.Number = 0x42;
        return new Dummy.Numberwrapper[]{a, b, c};
    }

    public static Dummy.Numberwrapper[] AppendSeqObj()
    {
        var a = new Dummy.Numberwrapper();
        var b = new Dummy.Numberwrapper();
        var c = new Dummy.Numberwrapper();
        a.Number = 42;
        b.Number = 43;
        c.Number = 33;
        return new Dummy.Numberwrapper[]{a, b, c};
    }

    public static Dummy.Numberwrapper[] ModifiedSeqObj()
    {
        var a = new Dummy.Numberwrapper();
        var b = new Dummy.Numberwrapper();
        var c = new Dummy.Numberwrapper();
        var d = new Dummy.Numberwrapper();
        var e = new Dummy.Numberwrapper();
        var f = new Dummy.Numberwrapper();
        a.Number = 0x0;
        b.Number = 0x2A;
        c.Number = 0x42;
        d.Number = 42;
        e.Number = 43;
        f.Number = 33;
        return new Dummy.Numberwrapper[]{a, b, c, d, e, f};
    }

    public static void NumberwrapperSequenceAssertEqual(
        Dummy.Numberwrapper[] a, Dummy.Numberwrapper[] b,
        [ CallerLineNumber ] int line = 0,
        [ CallerFilePath ] string file = null,
        [ CallerMemberName ] string member = null) {
        Contract.Requires(a != null, nameof(a));
        Contract.Requires(b != null, nameof(b));
        Test.Assert(a.Length == b.Length, "Different length", line, file, member);
        for (int i = 0; i < a.Length; ++i)
        {
            int av = a[i].Number;
            int bv = b[i].Number;
            Test.Assert(av == bv, $"Different values for element [{i}]: {av} == {bv}", line, file, member);
        }
    }
}

class NativeInheritImpl : Dummy.TestObject
{
    public NativeInheritImpl(Efl.Object parent = null) : base(parent) {}

    public bool slice_in_flag = false;
    public bool rw_slice_in_flag = false;
    public bool slice_out_flag = false;
    public bool rw_slice_out_flag = false;
    public bool binbuf_in_flag = false;
    public bool binbuf_in_own_flag = false;
    public bool binbuf_out_flag = false;
    public bool binbuf_out_own_flag = false;
    public bool binbuf_return_flag = false;
    public bool binbuf_return_own_flag = false;

    override public bool EinaSliceIn(Eina.Slice slice)
    {
        slice_in_flag = true;
        return slice.GetBytes().SequenceEqual(BaseSequence.Values());
    }

    override public bool EinaRwSliceIn(Eina.RwSlice slice)
    {
        rw_slice_in_flag = true;
        return slice.GetBytes().SequenceEqual(BaseSequence.Values());
    }

    private byte[] slice_out_seq = null;
    private GCHandle slice_out_pinned;
    override public bool EinaSliceOut(ref Eina.Slice slice)
    {
        slice_out_flag = true;

        slice_out_seq = (byte[]) BaseSequence.Values();
        slice_out_pinned = GCHandle.Alloc(slice_out_seq, GCHandleType.Pinned);
        IntPtr ptr = slice_out_pinned.AddrOfPinnedObject();

        slice.Mem = ptr;
        slice.Len = (UIntPtr) slice_out_seq.Length;

        return true;
    }

    private byte[] rw_slice_out_seq = null;
    private GCHandle rw_slice_out_pinned;
    override public bool EinaRwSliceOut(ref Eina.RwSlice slice)
    {
        rw_slice_out_flag = true;

        rw_slice_out_seq = (byte[]) BaseSequence.Values();
        rw_slice_out_pinned = GCHandle.Alloc(rw_slice_out_seq, GCHandleType.Pinned);
        IntPtr ptr = rw_slice_out_pinned.AddrOfPinnedObject();

        slice.Mem = ptr;
        slice.Len = (UIntPtr) rw_slice_out_seq.Length;

        return true;
    }

    // //
    //
    override public bool EinaBinbufIn(Eina.Binbuf binbuf)
    {
        binbuf_in_flag = true;

        bool r = binbuf.GetBytes().SequenceEqual(BaseSequence.Values());
        r = r && !binbuf.Own;

        binbuf.Insert(42, 0);
        binbuf.Insert(43, 0);
        binbuf.Append(33);

        binbuf.Dispose();

        return r;
    }

    private Eina.Binbuf binbuf_in_own_binbuf = null;
    override public bool EinaBinbufInOwn(Eina.Binbuf binbuf)
    {
        binbuf_in_own_flag = true;

        bool r = binbuf.GetBytes().SequenceEqual(BaseSequence.Values());
        r = r && binbuf.Own;

        binbuf.Insert(42, 0);
        binbuf.Insert(43, 0);
        binbuf.Append(33);

        binbuf_in_own_binbuf = binbuf;

        return r;
    }
    public bool binbuf_in_own_still_usable()
    {
        bool r = binbuf_in_own_binbuf.GetBytes().SequenceEqual(new byte[]{43, 42, 0x0, 0x2A, 0x42, 33});
        r = r && binbuf_in_own_binbuf.Own;

        binbuf_in_own_binbuf.Dispose();
        binbuf_in_own_binbuf = null;

        return r;
    }

    private Eina.Binbuf binbuf_out_binbuf = null;
    override public bool EinaBinbufOut(out Eina.Binbuf binbuf)
    {
        binbuf_out_flag = true;

        binbuf = new Eina.Binbuf();
        binbuf.Append(33);

        binbuf_out_binbuf = binbuf;

        return true;
    }
    public bool binbuf_out_still_usable()
    {
        bool r = binbuf_out_binbuf.GetBytes().SequenceEqual(BaseSequence.Values());
        r = r && binbuf_out_binbuf.Own;

        binbuf_out_binbuf.Dispose();
        binbuf_out_binbuf = null;

        return r;
    }

    private Eina.Binbuf binbuf_out_own_binbuf = null;
    override public bool EinaBinbufOutOwn(out Eina.Binbuf binbuf)
    {
        binbuf_out_own_flag = true;

        binbuf = new Eina.Binbuf();
        binbuf.Append(33);

        binbuf_out_own_binbuf = binbuf;

        return true;
    }
    public bool binbuf_out_own_no_longer_own()
    {
        bool r = !binbuf_out_own_binbuf.Own;
        binbuf_out_own_binbuf.Dispose();
        binbuf_out_own_binbuf = null;
        return r;
    }

    private Eina.Binbuf binbuf_return_binbuf = null;
    override public Eina.Binbuf EinaBinbufReturn()
    {
        binbuf_return_flag = true;

        var binbuf = new Eina.Binbuf();
        binbuf.Append(33);

        binbuf_return_binbuf = binbuf;

        return binbuf;
    }
    public bool binbuf_return_still_usable()
    {
        bool r = binbuf_return_binbuf.GetBytes().SequenceEqual(BaseSequence.Values());
        r = r && binbuf_return_binbuf.Own;

        binbuf_return_binbuf.Dispose();
        binbuf_return_binbuf = null;

        return r;
    }

    private Eina.Binbuf binbuf_return_own_binbuf = null;
    override public Eina.Binbuf EinaBinbufReturnOwn()
    {
        binbuf_return_own_flag = true;

        var binbuf = new Eina.Binbuf();
        binbuf.Append(33);

        binbuf_return_own_binbuf = binbuf;

        return binbuf;
    }
    public bool binbuf_return_own_no_longer_own()
    {
        bool r = !binbuf_return_own_binbuf.Own;
        binbuf_return_own_binbuf.Dispose();
        binbuf_return_own_binbuf = null;
        return r;
    }
}

} // EinaTestData