package util

import (
	"github.com/therecipe/qt/gui"
	"github.com/therecipe/qt/core"
	"github.com/therecipe/qt/widgets"
)

func ReflectToInt(iface interface{}) int {
	i, ok := iface.(int64)
	if ok {
		return int(i)
	}
	u, ok := iface.(uint64)
	if ok {
		return int(u)
	}
	return 0
}

func ReflectToFloat(iface interface{}) float64 {
	i, ok := iface.(float64)
	if ok {
		return float64(i)
	}
	u, ok := iface.(float32)
	if ok {
		return float64(u)
	}
	return 0
}

func IsZero(d interface{}) bool {
	if d == nil {
		return false
	}
	switch a := d.(type) {
	case int64:
		if a == 0 {
			return true
		}
	case uint64:
		if a == 0 {
			return true
		}
	}
	return false
}

func IsTrue(d interface{}) bool {
	if d == nil {
		return false
	}
	switch a := d.(type) {
	case int64:
		if a == 1 {
			return true
		}
	case uint64:
		if a == 1 {
			return true
		}
	}
	return false
}

func DropShadow(x, y, radius float64, alpha int) *widgets.QGraphicsDropShadowEffect{
	shadow := widgets.NewQGraphicsDropShadowEffect(nil)
	shadow.SetBlurRadius(radius)
	shadow.SetColor(gui.NewQColor3(0, 0, 0, alpha))
	shadow.SetOffset2(x, y)

	return shadow
}

func NewHFlowLayout(spacing int, padding int, paddingTop int, rightIdex int, width int) *widgets.QLayout {
	layout := widgets.NewQLayout2()
	items := []*widgets.QLayoutItem{}
	rect := core.NewQRect()
	layout.ConnectSizeHint(func() *core.QSize {
		size := core.NewQSize()
		for _, item := range items {
			size = size.ExpandedTo(item.MinimumSize())
		}
		return size
	})
	if width > 0 {
		layout.ConnectMinimumSize(func() *core.QSize {
			size := core.NewQSize()
			for _, item := range items {
				size = size.ExpandedTo(item.MinimumSize())
			}
			if size.Width() > width {
				size.SetWidth(width)
			}
			// size.SetWidth(0)
			return size
		})
		layout.ConnectMaximumSize(func() *core.QSize {
			size := core.NewQSize()
			for _, item := range items {
				size = size.ExpandedTo(item.MinimumSize())
			}
			// size.SetWidth(width)
			return size
		})
	}
	layout.ConnectAddItem(func(item *widgets.QLayoutItem) {
		items = append(items, item)
	})
	layout.ConnectSetGeometry(func(r *core.QRect) {
		sizes := [][]int{}
		maxWidth := 0
		for _, item := range items {
			sizeHint := item.SizeHint()
			width := sizeHint.Width()
			height := sizeHint.Height()
			size := []int{width, height}
			sizes = append(sizes, size)
			if width > maxWidth {
				maxWidth = width
			}
		}
		y := 0
		for i, item := range items {
			size := sizes[i]
			height := size[1]
			rect.SetRect(0, y, maxWidth, height)
			item.SetGeometry(rect)
			y += height
		}
	})
	layout.ConnectItemAt(func(index int) *widgets.QLayoutItem {
		if index < len(items) {
			return items[index]
		}
		return nil
	})
	layout.ConnectTakeAt(func(index int) *widgets.QLayoutItem {
		if index < len(items) {
			return items[index]
		}
		return nil
	})
	return layout
}

func NewVFlowLayout(spacing int, padding int, paddingTop int, rightIdex int, width int) *widgets.QLayout {
	layout := widgets.NewQLayout2()
	items := []*widgets.QLayoutItem{}
	rect := core.NewQRect()
	layout.ConnectSizeHint(func() *core.QSize {
		size := core.NewQSize()
		for _, item := range items {
			size = size.ExpandedTo(item.MinimumSize())
		}
		return size
	})
	if width > 0 {
		layout.ConnectMinimumSize(func() *core.QSize {
			size := core.NewQSize()
			for _, item := range items {
				size = size.ExpandedTo(item.MinimumSize())
			}
			if size.Width() > width {
				size.SetWidth(width)
			}
			size.SetWidth(0)
			return size
		})
		layout.ConnectMaximumSize(func() *core.QSize {
			size := core.NewQSize()
			for _, item := range items {
				size = size.ExpandedTo(item.MinimumSize())
			}
			size.SetWidth(width)
			return size
		})
	}
	layout.ConnectAddItem(func(item *widgets.QLayoutItem) {
		items = append(items, item)
	})
	layout.ConnectSetGeometry(func(r *core.QRect) {
		x := padding
		right := padding
		sizes := [][]int{}
		maxHeight := 0
		totalWidth := r.Width()
		for _, item := range items {
			sizeHint := item.SizeHint()
			width := sizeHint.Width()
			height := sizeHint.Height()
			size := []int{width, height}
			sizes = append(sizes, size)
			if height > maxHeight {
				maxHeight = height
			}
		}
		for i, item := range items {
			size := sizes[i]
			width := size[0]
			height := size[1]
			y := paddingTop
			if height != maxHeight {
				y = (maxHeight-height)/2 + paddingTop
			}

			if rightIdex > 0 && i >= rightIdex {
				rect.SetRect(totalWidth-width-right, y, width, height)
				item.SetGeometry(rect)
				if width > 0 {
					right += width + spacing
				}
			} else {
				if x+width+padding > totalWidth {
					width = totalWidth - x - padding
					rect.SetRect(x, y, width, height)
					item.SetGeometry(rect)
					break
				}
				rect.SetRect(x, y, width, height)
				item.SetGeometry(rect)
				if width > 0 {
					x += width + spacing
				}
			}
		}
	})
	layout.ConnectItemAt(func(index int) *widgets.QLayoutItem {
		if index < len(items) {
			return items[index]
		}
		return nil
	})
	layout.ConnectTakeAt(func(index int) *widgets.QLayoutItem {
		if index < len(items) {
			return items[index]
		}
		return nil
	})
	return layout
}