package app

import (
	"fmt"
	"strings"

	tea "charm.land/bubbletea/v2"

	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/audio"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/config"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/i18n"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/ui/animation"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/ui/components"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/ui/theme"
)

// Layar Pengaturan (PRD §5.1.5) — dibuka dengan `,` atau tombol Pengaturan di
// beranda. Semua perubahan berlaku langsung dan tersimpan ke config (tanpa
// restart, tanpa edit file manual).
//
// shortcut: baris teks (bukan form huh) + opsi inti dulu; warna aksen,
// direktori stack, mute-SSH menyusul.

// settingsRowIDs — urutan baris pengaturan.
var settingsRowIDs = []string{"language", "theme", "sound", "volume", "animation", "timestamps"}

// settingsEnv — terjemahan label baris.
func (m Model) settingsEnv(id string) (label, value string) {
	switch id {
	case "language":
		value = "Indonesia"
		if m.cfg.UI.Language == "en" {
			value = "English"
		}
	case "theme":
		value = i18n.T("theme." + string(theme.Current().Mode))
	case "sound":
		value = onOffText(m.sound.Enabled())
	case "volume":
		value = fmt.Sprintf("%d%%", m.sound.Volume())
	case "animation":
		value = onOffText(m.animating)
	case "timestamps":
		value = onOffText(m.showTimestamps)
	}
	return i18n.T("settings." + id), value
}

func onOffText(on bool) string {
	if on {
		return i18n.T("state.on")
	}
	return i18n.T("state.off")
}

// settingsRowSegments — satu baris sebagai segmen PLAIN (tanpa ANSI!): satu
// sumber untuk render, teks hit-test klik, dan zona tombol (- / +). Escape
// warna tidak boleh masuk ke sini — zona klik dihitung dari teks polos.
func (m Model) settingsRowSegments(i int) []string {
	label, value := m.settingsEnv(settingsRowIDs[i])
	label = fmt.Sprintf("%-*s", 16, label)
	if settingsRowIDs[i] == "volume" {
		return []string{label, "[ - ]", value, "[ + ]"}
	}
	return []string{label, "[ " + value + " ]"}
}

func (m Model) settingsRowPlain(i int) string {
	return strings.Join(m.settingsRowSegments(i), " ")
}

func (m Model) settingsRowLine(i, w int) string {
	th := theme.Current()
	sel := i == m.settingsRow
	segs := m.settingsRowSegments(i)
	out := make([]string, 0, len(segs))
	for k, s := range segs {
		c := th.Accent
		switch {
		case k == 0:
			c = th.Subtext
		case settingsRowIDs[i] == "volume" && k == 2:
			c = th.Text
		}
		out = append(out, paintRow(sel, c, s))
	}
	line := strings.Join(out, " ")
	if sel {
		line = selPad(line, w)
	}
	return line
}

// settingsBody — layar penuh: panel daftar opsi + info config.
func (m Model) settingsBody() string {
	w, h := m.width, m.bodyHeight()
	lines := []string{}
	for i := range settingsRowIDs {
		lines = append(lines, m.settingsRowLine(i, w-4))
	}
	lines = append(lines, "",
		fieldW(i18n.T("settings.config"), 16)+" "+dim(prettyPath(config.Path())),
		dim(i18n.T("settings.applyNote")),
	)
	return panel(i18n.T("settings.title"), "esc", lines, w, h, true)
}

func (m *Model) openSettings() {
	if m.view != viewSettings {
		m.prevView = m.view
	}
	m.view = viewSettings
	m.settingsRow = 0
	m.sound.Play(audio.ModalOpen)
}

// applySetting — ubah satu opsi: efek langsung + simpan ke config.
// delta: 0 = aktifkan (toggle/maju), -1 = mundur (pilihan), ±10 = volume.
func (m *Model) applySetting(id string, delta int) tea.Cmd {
	th := theme.Current()
	switch id {
	case "language":
		next := "en"
		if m.cfg.UI.Language == "en" {
			next = "id"
		}
		m.cfg.UI.Language = next
		i18n.SetLang(next)
		name := "Indonesia"
		if next == "en" {
			name = "English"
		}
		m.toast.Show(components.LevelInfo, i18n.Tf("toast.language", name), i18n.T("theme.switchHint"))
	case "theme":
		next := theme.CycleMode(th.Mode)
		if delta < 0 {
			next = cycleBack(th.Mode)
		}
		m.cfg.UI.ThemeMode = string(next)
		theme.Set(next, th.AccentName)
		m.toast.Show(components.LevelInfo,
			i18n.Tf("toast.themeMode", i18n.T("theme."+string(next))),
			i18n.T("theme.switchHint"))
	case "sound":
		on := !m.sound.Enabled()
		m.sound.SetEnabled(on)
		m.cfg.UI.SoundEnabled = on
		m.toast.Show(components.LevelInfo, i18n.Tf("toast.sound", onOffText(on)), "")
	case "volume":
		if delta == 0 {
			break
		}
		v := min(max(m.sound.Volume()+delta, 0), 100)
		m.sound.SetVolume(v)
		m.cfg.UI.SoundVolume = v
		m.toast.Show(components.LevelInfo, i18n.Tf("toast.volume", v), "")
	case "animation":
		m.animating = !m.animating
		m.cfg.UI.AnimationEnabled = m.animating
		m.toast.Show(components.LevelInfo, i18n.Tf("toast.animation", onOffText(m.animating)), "")
		if m.animating {
			m.tickID = animation.NewID()
			m.saveCfg()
			m.sound.Play(audio.Click)
			return animation.Next(m.tickID)
		}
	case "timestamps":
		m.showTimestamps = !m.showTimestamps
		m.cfg.UI.ShowTimestamps = m.showTimestamps
		m.toast.Show(components.LevelInfo, i18n.Tf("toast.timestamps", onOffText(m.showTimestamps)), "")
		m.saveCfg()
		m.sound.Play(audio.Click)
		return m.restartData()
	default:
		return nil
	}
	m.saveCfg()
	m.sound.Play(audio.Click)
	return nil
}

// cycleBack — mode tema mundur (auto ← dark ← light ← terminal).
func cycleBack(mode theme.Mode) theme.Mode {
	order := []theme.Mode{theme.ModeAuto, theme.ModeDark, theme.ModeLight, theme.ModeTerminal}
	for i, mm := range order {
		if mm == mode {
			return order[(i+len(order)-1)%len(order)]
		}
	}
	return theme.ModeAuto
}

// saveCfg — tulis config; gagal = toast (perubahan tetap hidup di sesi ini).
func (m *Model) saveCfg() {
	if err := config.Save(m.cfg); err != nil {
		m.toast.Show(components.LevelWarning, i18n.T("toast.configSave"), err.Error())
	}
}

// settingsKey — tombol di layar Pengaturan (layar ini menangkap sendiri).
func (m *Model) settingsKey(key string) tea.Cmd {
	last := len(settingsRowIDs) - 1
	switch key {
	case "esc", ",":
		m.view = m.prevView
		m.sound.Play(audio.ModalClose)
	case "j", "down":
		m.settingsRow = min(m.settingsRow+1, last)
		m.sound.Play(audio.Navigate)
	case "k", "up":
		m.settingsRow = max(m.settingsRow-1, 0)
		m.sound.Play(audio.Navigate)
	case "enter", "space":
		return m.applySetting(settingsRowIDs[m.settingsRow], 0)
	case "l", "right", "]":
		delta := 1
		if settingsRowIDs[m.settingsRow] == "volume" {
			delta = 10
		}
		return m.applySetting(settingsRowIDs[m.settingsRow], delta)
	case "h", "left", "[":
		delta := -1
		if settingsRowIDs[m.settingsRow] == "volume" {
			delta = -10
		}
		return m.applySetting(settingsRowIDs[m.settingsRow], delta)
	case "q", "ctrl+c":
		m.stopLogs()
		if m.eventsCancel != nil {
			m.eventsCancel()
		}
		m.sound.Play(audio.ModalClose)
		return tea.Quit
	}
	return nil
}

// settingsClick — klik baris: pilih + aktifkan; zona [-] [+] = volume.
func (m *Model) settingsClick(x, y int) tea.Cmd {
	i := y - (m.headerRows() + 1)
	if i < 0 || i >= len(settingsRowIDs) {
		return nil
	}
	m.settingsRow = i
	if label, ok := labelZoneAt(m.settingsRowPlain(i), x-2); ok {
		switch label {
		case "-":
			return m.applySetting(settingsRowIDs[i], -10)
		case "+":
			return m.applySetting(settingsRowIDs[i], 10)
		default:
			return m.applySetting(settingsRowIDs[i], 0)
		}
	}
	m.sound.Play(audio.Click)
	return nil
}