package tui

import (
	"fmt"
	"strings"

	"charm.land/bubbles/v2/list"
	"charm.land/bubbles/v2/textinput"
	tea "charm.land/bubbletea/v2"

	"gitgud.io/mike/mpv-manager/pkg/config"
)

// setupInstallPathList builds the custom install path menu
func (m *Model) setupInstallPathList() {
	items := []list.Item{
		menuItem{
			id:          "edit-install-path",
			title:       "✏️ Edit Custom Install Path",
			description: "Current: " + config.GetInstallPath(),
			recommended: false,
		},
		menuItem{
			id:          "reset-install-path",
			title:       "↩️ Reset to Default Install Path",
			description: "Clear the custom path and use the platform default",
			recommended: false,
		},
	}

	m.installPathList = m.createStyledList("Custom Install Path", items)
}

// handleInstallPathUpdate handles the custom install path menu state
func (m *Model) handleInstallPathUpdate(msg tea.Msg) (*Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.KeyPressMsg:
		switch keyCode(msg) {
		case tea.KeyEsc:
			m.setupConfigOptionsList()
			m.state = StateConfigOptions
			return m, nil
		case tea.KeyEnter:
			selected := m.installPathList.SelectedItem()
			if selected != nil {
				item := selected.(menuItem)
				switch item.id {
				case "edit-install-path":
					ti := textinput.New()
					ti.Placeholder = "Enter absolute install path..."
					ti.SetValue(config.GetInstallPath())
					ti.CharLimit = 256
					ti.SetWidth(50)
					ti.Focus()
					m.installPathTextInput = ti
					m.installPathStatusMsg = ""
					m.state = StateInstallPathEdit
					return m, nil
				case "reset-install-path":
					if err := config.ClearInstallPath(); err != nil {
						m.installPathStatusMsg = "✗ Failed to save install path: " + err.Error()
						return m, nil
					}
					m.installPathStatusMsg = "✓ Install path reset to default: " + config.GetInstallPath()
					m.setupInstallPathList()
					return m, nil
				}
			}
		}
	}

	m.installPathList, cmd = m.installPathList.Update(msg)
	return m, cmd
}

// handleInstallPathEditUpdate handles the custom install path text input state
func (m *Model) handleInstallPathEditUpdate(msg tea.Msg) (*Model, tea.Cmd) {
	var tiCmd tea.Cmd
	m.installPathTextInput, tiCmd = m.installPathTextInput.Update(msg)

	switch msg := msg.(type) {
	case tea.KeyPressMsg:
		switch keyCode(msg) {
		case tea.KeyEsc:
			m.installPathStatusMsg = ""
			m.state = StateInstallPath
			return m, nil
		case tea.KeyEnter:
			path := strings.TrimSpace(m.installPathTextInput.Value())
			if err := config.ValidateCustomInstallPath(path); err != nil {
				m.installPathStatusMsg = fmt.Sprintf("✗ %v", err)
				return m, nil
			}
			if err := config.SetInstallPath(path); err != nil {
				m.installPathStatusMsg = "✗ Failed to save install path: " + err.Error()
				return m, nil
			}
			m.installPathStatusMsg = "✓ Install path set to: " + path
			m.setupInstallPathList()
			m.state = StateInstallPath
			return m, nil
		}
	}

	return m, tiCmd
}

// installPathView renders the custom install path menu
func (m Model) installPathView() string {
	var content strings.Builder

	content.WriteString(titleStyle.Render("📁 Custom Install Path"))
	content.WriteString("\n")
	content.WriteString(subtitleStyle.Render("══════════════════════"))
	content.WriteString("\n\n")

	content.WriteString(infoStyle.Render("MPV binaries will be installed to:"))
	content.WriteString("\n")
	content.WriteString(subtitleStyle.Render("  " + config.GetInstallPath()))
	content.WriteString("\n\n")

	if m.installPathStatusMsg != "" {
		if strings.HasPrefix(m.installPathStatusMsg, "✓") {
			content.WriteString(successStyle.Render(m.installPathStatusMsg))
		} else {
			content.WriteString(errorStyle.Render(m.installPathStatusMsg))
		}
		content.WriteString("\n\n")
	}

	content.WriteString(m.installPathList.View())
	content.WriteString("\n\n")

	content.WriteString(infoStyle.Render("Press "))
	content.WriteString(subtitleStyle.Render("Enter"))
	content.WriteString(infoStyle.Render(" to select, "))
	content.WriteString(subtitleStyle.Render("Esc"))
	content.WriteString(infoStyle.Render(" to go back"))

	return content.String()
}

// installPathEditView renders the custom install path text input
func (m Model) installPathEditView() string {
	var content strings.Builder

	content.WriteString(titleStyle.Render("Edit Custom Install Path"))
	content.WriteString("\n")
	content.WriteString(subtitleStyle.Render("══════════════════════"))
	content.WriteString("\n\n")

	content.WriteString(m.installPathTextInput.View())
	content.WriteString("\n\n")

	if m.installPathStatusMsg != "" {
		content.WriteString(errorStyle.Render(m.installPathStatusMsg))
		content.WriteString("\n\n")
	}

	content.WriteString(infoStyle.Render("Press "))
	content.WriteString(subtitleStyle.Render("Enter"))
	content.WriteString(infoStyle.Render(" to save, "))
	content.WriteString(subtitleStyle.Render("Esc"))
	content.WriteString(infoStyle.Render(" to cancel"))

	return content.String()
}