package ui

import (
	"strconv"
	
	"git.flowmade.one/flowmade-one/iris/internal/element"
	"git.flowmade.one/flowmade-one/iris/reactive"
)

// TextInput creates a reactive text input field
func TextInput(value *reactive.Signal[string], placeholder string) View {
	input := element.NewElement("input")
	input.Attr("type", "text")
	input.Attr("placeholder", placeholder)
	
	// Set initial value
	input.Set("value", value.Get())
	
	// Update input when signal changes
	reactive.NewEffect(func() {
		currentValue := value.Get()
		if input.Get("value").String() != currentValue {
			input.Set("value", currentValue)
		}
	})
	
	// Update signal when user types
	input.On("input", func() {
		newValue := input.Get("value").String()
		if value.Get() != newValue {
			value.Set(newValue)
		}
	})
	
	return View{input}
}

// TextArea creates a multi-line text input
func TextArea(value *reactive.Signal[string], placeholder string, rows int) View {
	textarea := element.NewElement("textarea")
	textarea.Attr("placeholder", placeholder)
	textarea.Attr("rows", string(rune(rows)))
	
	// Set initial value
	textarea.Set("value", value.Get())
	
	// Update textarea when signal changes
	reactive.NewEffect(func() {
		currentValue := value.Get()
		if textarea.Get("value").String() != currentValue {
			textarea.Set("value", currentValue)
		}
	})
	
	// Update signal when user types
	textarea.On("input", func() {
		newValue := textarea.Get("value").String()
		if value.Get() != newValue {
			value.Set(newValue)
		}
	})
	
	return View{textarea}
}

// Checkbox creates a reactive checkbox input
func Checkbox(checked *reactive.Signal[bool], label string) View {
	container := element.NewElement("label")
	container.Get("style").Call("setProperty", "display", "flex")
	container.Get("style").Call("setProperty", "align-items", "center")
	container.Get("style").Call("setProperty", "gap", "8px")
	container.Get("style").Call("setProperty", "cursor", "pointer")
	
	checkbox := element.NewElement("input")
	checkbox.Attr("type", "checkbox")
	
	// Set initial state
	if checked.Get() {
		checkbox.Set("checked", true)
	}
	
	// Update checkbox when signal changes
	reactive.NewEffect(func() {
		isChecked := checked.Get()
		checkbox.Set("checked", isChecked)
	})
	
	// Update signal when user clicks
	checkbox.On("change", func() {
		newValue := checkbox.Get("checked").Bool()
		checked.Set(newValue)
	})
	
	// Add label text
	labelText := element.NewTextNode(label)
	
	container.Child(checkbox)
	container.Child(labelText)
	
	return View{container}
}

// Select creates a dropdown selection component
func Select(selected *reactive.Signal[string], options []string, placeholder string) View {
	selectElem := element.NewElement("select")
	
	// Add placeholder option if provided
	if placeholder != "" {
		placeholderOption := element.NewElement("option")
		placeholderOption.Set("value", "")
		placeholderOption.Set("disabled", true)
		placeholderOption.Set("selected", true)
		placeholderOption.Set("textContent", placeholder)
		selectElem.Child(placeholderOption)
	}
	
	// Add options
	for _, option := range options {
		optionElem := element.NewElement("option")
		optionElem.Set("value", option)
		optionElem.Set("textContent", option)
		selectElem.Child(optionElem)
	}
	
	// Set initial value
	selectElem.Set("value", selected.Get())
	
	// Update select when signal changes
	reactive.NewEffect(func() {
		currentValue := selected.Get()
		selectElem.Set("value", currentValue)
	})
	
	// Update signal when user selects
	selectElem.On("change", func() {
		newValue := selectElem.Get("value").String()
		selected.Set(newValue)
	})
	
	return View{selectElem}
}

// Slider creates a range input for numeric values
func Slider(value *reactive.Signal[int], min, max int) View {
	slider := element.NewElement("input")
	slider.Attr("type", "range")
	slider.Attr("min", strconv.Itoa(min))
	slider.Attr("max", strconv.Itoa(max))

	// Set initial value
	slider.Set("value", strconv.Itoa(value.Get()))

	// Update slider when signal changes
	reactive.NewEffect(func() {
		currentValue := value.Get()
		slider.Set("value", strconv.Itoa(currentValue))
	})

	// Update signal when user drags
	slider.On("input", func() {
		newValueStr := slider.Get("value").String()
		if newValue, err := strconv.Atoi(newValueStr); err == nil {
			value.Set(newValue)
		}
	})

	return View{slider}
}

// NumberInput creates a reactive numeric input field for float64 values
func NumberInput(value *reactive.Signal[float64], placeholder string) View {
	input := element.NewElement("input")
	input.Attr("type", "number")
	input.Attr("step", "0.01")
	input.Attr("min", "0")
	input.Attr("placeholder", placeholder)

	// Set initial value
	if value.Get() != 0 {
		input.Set("value", strconv.FormatFloat(value.Get(), 'f', -1, 64))
	}

	// Update input when signal changes
	reactive.NewEffect(func() {
		currentValue := value.Get()
		var displayValue string
		if currentValue == 0 {
			displayValue = ""
		} else {
			displayValue = strconv.FormatFloat(currentValue, 'f', -1, 64)
		}
		if input.Get("value").String() != displayValue {
			input.Set("value", displayValue)
		}
	})

	// Update signal when user types
	input.On("input", func() {
		newValueStr := input.Get("value").String()
		if newValueStr == "" {
			value.Set(0.0)
		} else if newValue, err := strconv.ParseFloat(newValueStr, 64); err == nil {
			value.Set(newValue)
		}
	})

	return View{input}
}