package ui

import (
	"encoding/json"
	"fmt"
	"strings"
	"time"

	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/viewport"
	"github.com/charmbracelet/lipgloss"
	"github.com/muesli/reflow/wordwrap"
)

const timePrefixFormat = "15:04:05"

func renderLines(width int, lines ...string) []string {
	var wrappedLines []string

	now := time.Now().Format(timePrefixFormat)
	leftMargin := lipgloss.Width(fmt.Sprintf(
		"%s %s ",
		timeStyle.Render(now),
		lineSeparatorStyle.Render("|"),
	))

	for _, line := range lines {
		wrapped := wordwrap.String(line, width-leftMargin)
		wrappedLines = append(wrappedLines, strings.Split(wrapped, "\n")...)
	}

	var rendered []string
	for _, wrappedLine := range wrappedLines {
		now := time.Now().Format(timePrefixFormat)
		rendered = append(rendered, fmt.Sprintf(
			"%s %s %s",
			timeStyle.Render(now),
			lineSeparatorStyle.Render("|"),
			lineStyle.Render(wrappedLine),
		),
		)
	}

	return rendered
}

func newViewport(width, height int) viewport.Model {
	viewp := viewport.New(width, height)
	viewp.KeyMap = viewport.KeyMap{
		PageDown:     key.NewBinding(key.WithKeys("pgdown")),
		PageUp:       key.NewBinding(key.WithKeys("pgup")),
		HalfPageUp:   key.NewBinding(key.WithKeys("ctrl+k")),
		HalfPageDown: key.NewBinding(key.WithKeys("ctrl+j")),
	}
	return viewp
}

func renderCmdHelp(m model) []string {
	var (
		renderedCmdHelp []string
		cmdHelp         []string
	)

	if m.width >= 90 {
		cmdHelp = []string{
			"CTRL+N/P", "TOGGLE PROFILE",
			"CTRL+J/K", "SCROLL UP/DOWN",
			"CTRL+L", "CLEAR",
			"CTRL+C", "EXIT",
		}
	} else {
		// NOTE(d1): respect small screens
		cmdHelp = []string{
			"CTRL+N/P",
			"CTRL+J/K",
			"CTRL+L",
			"CTRL+C",
		}
	}

	for idx, cmd := range cmdHelp {
		if idx%2 == 0 {
			renderedCmdHelp = append(renderedCmdHelp, cmdKeyStyle.Render(cmd))
		} else {
			renderedCmdHelp = append(renderedCmdHelp, cmdDescriptionStyle.Render(cmd))
		}
	}

	return renderedCmdHelp
}

// https://git.openprivacy.ca/sarah/cwtchbot/src/branch/main/bot.go
type MessageWrapper struct {
	Overlay int    `json:"o"`
	Data    string `json:"d"`
}

func packMessage(overlay int, message string) []byte {
	mw := new(MessageWrapper)
	mw.Overlay = overlay
	mw.Data = message
	data, _ := json.Marshal(mw)
	return data
}

func unpackMessage(message string) MessageWrapper {
	mw := new(MessageWrapper)
	json.Unmarshal([]byte(message), mw)
	return *mw
}