package screens

import (
	"fmt"
	"io"
	"strings"

	"github.com/charmbracelet/bubbles/list"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

type CursoriusServer struct {
	Name  string
	Url   string
	Token string
}

func (s CursoriusServer) Login() ScreenSwitchMsg {
	dashboard := createDashboard(s)
	return ScreenSwitchMsg{
		NewScreen: dashboard,
	}
}

func tabBorderWithBottom(left, middle, right string) lipgloss.Border {
	border := lipgloss.RoundedBorder()
	border.BottomLeft = left
	border.Bottom = middle
	border.BottomRight = right
	return border
}

var (
	inactiveTabBorder = tabBorderWithBottom("┴", "─", "┴")
	activeTabBorder   = tabBorderWithBottom("┘", " ", "└")
	docStyle          = lipgloss.NewStyle().Padding(1, 2, 1, 2)
	highlightColor    = lipgloss.AdaptiveColor{Light: "#874BFD", Dark: "#7D56F4"}
	inactiveTabStyle  = lipgloss.NewStyle().Border(inactiveTabBorder, true).BorderForeground(highlightColor).Padding(0, 1)
	activeTabStyle    = inactiveTabStyle.Copy().Border(activeTabBorder, true)
	windowStyle       = lipgloss.NewStyle().BorderForeground(highlightColor).Padding(2, 0).Align(lipgloss.Center).Border(lipgloss.NormalBorder()).UnsetBorderTop()
)

type Dashboard struct {
	Tabs       []string
	TabContent []list.Model
	activeTab  int
	width      int
	height     int
}

func (m Dashboard) Init() tea.Cmd {
	return nil
}

func (m Dashboard) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		m.width = msg.Width
		m.height = msg.Height
		for i := 0; i < len(m.TabContent); i++ {
			m.TabContent[i].SetWidth(m.width - 10)
			m.TabContent[i].SetHeight(m.height - 10)
		}
	case tea.KeyMsg:
		switch keypress := msg.String(); keypress {
		case "ctrl+c", "q":
			return m, tea.Quit
		case "right", "l", "n", "tab":
			m.activeTab = min(m.activeTab+1, len(m.Tabs)-1)
			return m, nil
		case "left", "h", "p", "shift+tab":
			m.activeTab = max(m.activeTab-1, 0)
			return m, nil
		}
	}

	return m, nil
}

func (m Dashboard) View() string {
	doc := strings.Builder{}

	var renderedTabs []string

	for i, t := range m.Tabs {
		var style lipgloss.Style
		isFirst, isLast, isActive := i == 0, i == len(m.Tabs)-1, i == m.activeTab
		if isActive {
			style = activeTabStyle.Copy()
		} else {
			style = inactiveTabStyle.Copy()
		}
		border, _, _, _, _ := style.GetBorder()
		if isFirst && isActive {
			border.BottomLeft = "│"
		} else if isFirst && !isActive {
			border.BottomLeft = "├"
		} else if isLast && isActive {
			//border.BottomRight = "│"
			border.BottomRight = "└"
		} else if isLast && !isActive {
			//border.BottomRight = "┤"
			border.BottomRight = "┴"
		}
		style = style.Border(border)
		renderedTabs = append(renderedTabs, style.Render(t))
	}

	row := lipgloss.JoinHorizontal(lipgloss.Top, renderedTabs...)
	doc.WriteString(row)
	rows := strings.Split(row, "\n")
	// not sure why this is -4 ... :shrug:
	x := m.width - lipgloss.Width(rows[2]) - 1 - 4
	extraStyle := lipgloss.NewStyle().Foreground(highlightColor)
	for i := 0; i < x; i++ {
		doc.WriteString(extraStyle.Render("─"))
	}
	doc.WriteString(extraStyle.Render("┐"))
	doc.WriteString("\n")
	doc.WriteString(windowStyle.Width((m.width - 4 - windowStyle.GetHorizontalFrameSize())).Height(m.height - 6).Render(m.TabContent[m.activeTab].View()))
	return docStyle.Render(doc.String())
}

type dashboardItem string

func (i dashboardItem) FilterValue() string { return "" }

type dashboardItemDelegate struct{}

func (d dashboardItemDelegate) Height() int                               { return 1 }
func (d dashboardItemDelegate) Spacing() int                              { return 0 }
func (d dashboardItemDelegate) Update(msg tea.Msg, m *list.Model) tea.Cmd { return nil }
func (d dashboardItemDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
	var str string
	switch i := listItem.(type) {
	case dashboardItem:
		str = string(i)
	}

	fn := itemStyle.Render
	if index == m.Index() {
		fn = func(s string) string {
			return selectedItemStyle.Render("> " + s)
		}
	}

	fmt.Fprint(w, fn(str))
}

func createDashboard(s CursoriusServer) Dashboard {
	tabs := []string{"Pipelines", "Secrets", "Clone Credentials", "Runners"}
	content := []list.Item{dashboardItem("Pipelines"), dashboardItem("Secrets"), dashboardItem("Clone Credentials"), dashboardItem("Runners")}

	tabContent := []list.Model{
		list.New(content, dashboardItemDelegate{}, 50, 50),
		list.New(content, dashboardItemDelegate{}, 50, 50),
		list.New(content, dashboardItemDelegate{}, 50, 50),
	}

	return Dashboard{
		Tabs:       tabs,
		TabContent: tabContent,
		width:      50,
		height:     50,
	}
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}