package issues

import (
	"fmt"
	"strings"

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

// The main bubbletea Model
type Model struct {
	Issue    Issue
	Path     string
	viewport viewport.Model
}

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

// Handles quit logic and viewport scroll and size updates
func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg.(type) {
	case tea.KeyMsg:
		return m, tea.Quit
	}

	return m, nil
}

// [lipgloss] style definitions
var (
	titleStyle = lipgloss.NewStyle().
			Bold(true).
			Underline(true)

	statusStyle = lipgloss.NewStyle().
			Faint(true).
			Italic(true)

	variadicTitleStyle = lipgloss.NewStyle().
				Align(lipgloss.Left).
				Italic(true)

	variadicDataStyle = lipgloss.NewStyle().
				Width(40).
				BorderStyle(lipgloss.ASCIIBorder())

	borderStyle = lipgloss.NewStyle().
			Padding(1, 2).
			Margin(1).
			BorderStyle(lipgloss.NormalBorder())
)

// Handles all view logic for [issue.Issue]
func (m Model) renderIssue() string {
	var output string
	// title
	output = output + titleStyle.Render(m.Issue.Title)

	// status
	output = output + fmt.Sprintf("\n%s", statusStyle.Render(m.Issue.Status.Data))

	// variadics
	var tags string
	for _, field := range m.Issue.Tags.Fields {
		tags = tags + field.Path + ", "
	}
	tags = strings.TrimRight(tags, ", ")

	var blockedby string
	for _, field := range m.Issue.Blockedby.Fields {
		blockedby = blockedby + field.Path + ", "
	}
	blockedby = strings.TrimRight(blockedby, ", ")

	if len(m.Issue.Tags.Fields) > 0 {
		output = output + variadicTitleStyle.Render("\n\nTags:")
		output = output + fmt.Sprintf("\n%s", variadicDataStyle.Render(tags))
	}

	if len(m.Issue.Blockedby.Fields) > 0 {
		output = output + variadicTitleStyle.Render("\n\nBlockedby:")
		output = output + fmt.Sprintf("\n%s", variadicDataStyle.Render(blockedby))
	}

	// description
	output = output + titleStyle.Render("\n\nDescription:\n")
	output = output + fmt.Sprintf("\n%s", m.Issue.Description.Data)

	return borderStyle.Render(output)
}

// Wraps [issue.Model.renderIssue] in a viewport
func (m Model) View() string {
	return m.renderIssue()
}