local L = WeakAuras.L

local function createOptions(id, data)
  local options = {
    __title = L["Texture Settings"],
    __order = 1,
    texture = {
      type = "input",
      width = WeakAuras.doubleWidth,
      name = L["Texture"],
      order = 1
    },
    desaturate = {
      type = "toggle",
      width = WeakAuras.normalWidth,
      name = L["Desaturate"],
      order = 2,
    },
    space2 = {
      type = "execute",
      name = "",
      width = WeakAuras.halfWidth,
      order = 5,
      image = function() return "", 0, 0 end,
    },
    chooseTexture = {
      type = "execute",
      name = L["Choose"],
      width = WeakAuras.halfWidth,
      order = 7,
      func = function()
        WeakAuras.OpenTexturePicker(data, "texture", WeakAuras.texture_types);
      end
    },
    color = {
      type = "color",
      width = WeakAuras.normalWidth,
      name = L["Color"],
      hasAlpha = true,
      order = 10
    },
    blendMode = {
      type = "select",
      width = WeakAuras.normalWidth,
      name = L["Blend Mode"],
      order = 12,
      values = WeakAuras.blend_types
    },
    mirror = {
      type = "toggle",
      width = WeakAuras.normalWidth,
      name = L["Mirror"],
      order = 20
    },
    alpha = {
      type = "range",
      width = WeakAuras.normalWidth,
      name = L["Alpha"],
      order = 25,
      min = 0,
      max = 1,
      bigStep = 0.01,
      isPercent = true
    },
    rotate = {
      type = "toggle",
      width = WeakAuras.normalWidth,
      name = L["Allow Full Rotation"],
      order = 30
    },
    rotation = {
      type = "range",
      width = WeakAuras.normalWidth,
      name = L["Rotation"],
      min = 0,
      max = 360,
      step = 1,
      bigStep = 3,
      order = 35,
      hidden = function() return not data.rotate end
    },
    discrete_rotation = {
      type = "range",
      width = WeakAuras.normalWidth,
      name = L["Discrete Rotation"],
      min = 0,
      max = 360,
      step = 90,
      order = 35,
      hidden = function() return data.rotate end
    },
  };

  return {
    texture = options,
    position = WeakAuras.PositionOptions(id, data, 2),
  };
end

local function createThumbnail(parent)
  local borderframe = CreateFrame("FRAME", nil, parent);
  borderframe:SetWidth(32);
  borderframe:SetHeight(32);

  local border = borderframe:CreateTexture(nil, "OVERLAY");
  border:SetAllPoints(borderframe);
  border:SetTexture("Interface\\BUTTONS\\UI-Quickslot2.blp");
  border:SetTexCoord(0.2, 0.8, 0.2, 0.8);

  local texture = borderframe:CreateTexture();
  borderframe.texture = texture;
  texture:SetPoint("CENTER", borderframe, "CENTER");

  return borderframe;
end

local function modifyThumbnail(parent, region, data, fullModify, size)
  size = size or 30;
  local scale;
  if(data.height > data.width) then
    scale = size/data.height;
    region.texture:SetWidth(scale * data.width);
    region.texture:SetHeight(size);
  else
    scale = size/data.width;
    region.texture:SetWidth(size);
    region.texture:SetHeight(scale * data.height);
  end

  WeakAuras.SetTextureOrAtlas(region.texture, data.texture);
  region.texture:SetVertexColor(data.color[1], data.color[2], data.color[3], data.color[4]);
  region.texture:SetBlendMode(data.blendMode);

  local ulx,uly , llx,lly , urx,ury , lrx,lry;
  if(data.rotate) then
    local angle = rad(135 - data.rotation);
    local vx = math.cos(angle);
    local vy = math.sin(angle);

    ulx,uly , llx,lly , urx,ury , lrx,lry = 0.5+vx,0.5-vy , 0.5-vy,0.5-vx , 0.5+vy,0.5+vx , 0.5-vx,0.5+vy;
  else
    if(data.discrete_rotation == 0 or data.discrete_rotation == 360) then
      ulx,uly , llx,lly , urx,ury , lrx,lry = 0,0 , 0,1 , 1,0 , 1,1;
    elseif(data.discrete_rotation == 90) then
      ulx,uly , llx,lly , urx,ury , lrx,lry = 1,0 , 0,0 , 1,1 , 0,1;
    elseif(data.discrete_rotation == 180) then
      ulx,uly , llx,lly , urx,ury , lrx,lry = 1,1 , 1,0 , 0,1 , 0,0;
    elseif(data.discrete_rotation == 270) then
      ulx,uly , llx,lly , urx,ury , lrx,lry = 0,1 , 1,1 , 0,0 , 1,0;
    end
  end
  if(data.mirror) then
    region.texture:SetTexCoord(urx,ury , lrx,lry , ulx,uly , llx,lly);
  else
    region.texture:SetTexCoord(ulx,uly , llx,lly , urx,ury , lrx,lry);
  end
end

local function createIcon()
  local data = {
    height = 40,
    width = 40,
    texture = "Textures\\SpellActivationOverlays\\Eclipse_Sun",
    color = {1, 1, 1, 1},
    blendMode = "ADD",
    rotate = true;
    rotation = 0;
  };

  local thumbnail = createThumbnail(UIParent);
  modifyThumbnail(UIParent, thumbnail, data, nil, 50);

  return thumbnail;
end

local templates = {
  {
    title = L["Default"],
    data = {
    };
  },
  {
    title = L["Star"],
    data = {
      texture = "Spells\\T_Star3",
      blendMode = "ADD",
      width = 200,
      height = 200,
      discrete_rotation = 0,
    }
  },
  {
    title = L["Leaf"],
    data = {
      texture = "Spells\\Nature_Rune_128",
      blendMode = "ADD",
      width = 200,
      height = 200,
      discrete_rotation = 0,
    }
  },
  {
    title = L["Hawk"],
    data = {
      texture = "Spells\\Aspect_Hawk",
      blendMode = "ADD",
      width = 200,
      height = 200,
      discrete_rotation = 0,
    }
  },
  {
    title = L["Low Mana"],
    data = {
      texture = "Interface\\Addons\\WeakAuras\\PowerAurasMedia\\Auras\\Aura70",
      blendMode = "ADD",
      width = 200,
      height = 200,
      discrete_rotation = 0,
    }
  },
}

WeakAuras.RegisterRegionOptions("texture", createOptions, createIcon, L["Texture"], createThumbnail, modifyThumbnail, L["Shows a custom texture"], templates);
