package ui

import (
	"fmt"
	"strings"

	"fergalla.com/dockerbot/internal/docker"
	"fergalla.com/dockerbot/internal/i18n"
	"github.com/go-telegram/bot/models"
)

// Renderer encapsula toda la lógica de renderizado UI

type Renderer struct {
	T func(string, ...map[string]string) string
}

// =========================
// 📦 LISTADO DE CONTENEDORES
// =========================

type Page struct {
	Items      []docker.ContainerBasicInfo
	Page       int
	PageSize   int
	TotalItems int
}

func (r *Renderer) RenderContainerList(p Page) (string, *models.InlineKeyboardMarkup) {
	var sb strings.Builder

	// Header
	sb.WriteString(r.T("app.headerList"))
	sb.WriteString("\n")
	sb.WriteString(r.separator())
	sb.WriteString("\n")

	// Summary
	sb.WriteString(r.renderStateSummary(p.Items))

	// Slice paginado
	start := p.Page * p.PageSize
	end := start + p.PageSize

	if start > len(p.Items) {
		return r.T("e.container.list.not_found"), nil
	}
	if end > len(p.Items) {
		end = len(p.Items)
	}

	visibleItems := p.Items[start:end]

	// Items (texto informativo)
	for _, c := range visibleItems {
		sb.WriteString(r.renderContainerItem(c))
	}

	// Footer
	totalPages := (p.TotalItems + p.PageSize - 1) / p.PageSize
	sb.WriteString("\n")
	sb.WriteString(r.T("ui.page", map[string]string{
		"current": fmt.Sprintf("%d", p.Page+1),
		"total":   fmt.Sprintf("%d", totalPages),
	}))

	// Keyboard combinando contenedores + navegación
	keyboard := r.buildContainerListKeyboard(visibleItems, p.Page, totalPages)

	return sb.String(), keyboard
}

func (r *Renderer) renderContainerItem(c docker.ContainerBasicInfo) string {
	var sb strings.Builder

	sb.WriteString(r.T("list.container.header", map[string]string{
		"name": c.Name,
	}))

	sb.WriteString("\n")

	sb.WriteString(r.T("list.container.image", map[string]string{
		"image": c.Image,
	}))

	sb.WriteString("\n")

	state := r.T(i18n.Key("d", "state", c.State))

	line := r.T("list.container.state", map[string]string{
		"emoji": stateEmoji(c.State),
		"state": state,
	})

	if c.Health != "" {
		health := r.T(i18n.Key("d", "health", c.Health))
		line += r.T("list.container.health_suffix", map[string]string{
			"health": health,
		})
	}

	sb.WriteString(line)
	sb.WriteString("\n\n")

	return sb.String()
}

// =========================
// 📊 HELPERS
// =========================

func (r *Renderer) renderStateSummary(data []docker.ContainerBasicInfo) string {
	running, stopped, restarting, paused, other := 0, 0, 0, 0, 0

	for _, c := range data {
		switch c.State {
		case "running":
			running++
		case "exited", "dead":
			stopped++
		case "restarting":
			restarting++
		case "paused":
			paused++
		default:
			other++
		}
	}

	return r.T("list.summary", map[string]string{
		"running":    fmt.Sprintf("%d", running),
		"stopped":    fmt.Sprintf("%d", stopped),
		"restarting": fmt.Sprintf("%d", restarting),
		"paused":     fmt.Sprintf("%d", paused),
		"other":      fmt.Sprintf("%d", other),
	}) + "\n\n"
}

func (r *Renderer) separator() string {
	return r.T("ui.separator")
}

// =========================
// ⬅️➡️ PAGINACIÓN + BOTONES
// =========================

func (r *Renderer) buildContainerListKeyboard(items []docker.ContainerBasicInfo, page, totalPages int) *models.InlineKeyboardMarkup {
	var rows [][]models.InlineKeyboardButton

	// 🔘 botones de contenedores (2 por fila)
	var row []models.InlineKeyboardButton

	for i, c := range items {
		btn := models.InlineKeyboardButton{
			Text:         stateEmoji(c.State) + " " + c.Name,
			CallbackData: fmt.Sprintf("dockerList_infoDocker:%s:%d", c.Name, page),
		}

		row = append(row, btn)

		if len(row) == 2 {
			rows = append(rows, row)
			row = []models.InlineKeyboardButton{}
		}

		if i == len(items)-1 && len(row) > 0 {
			rows = append(rows, row)
		}
	}

	// ⬅️➡️ navegación
	var navRow []models.InlineKeyboardButton

	if page > 0 {
		navRow = append(navRow, models.InlineKeyboardButton{
			Text:         r.T("ui.prev"),
			CallbackData: fmt.Sprintf("dockerList_page:%d", page-1),
		})
	}

	if page < totalPages-1 {
		navRow = append(navRow, models.InlineKeyboardButton{
			Text:         r.T("ui.next"),
			CallbackData: fmt.Sprintf("dockerList_page:%d", page+1),
		})
	}

	// 🔄 refresh siempre visible
	navRow = append(navRow, models.InlineKeyboardButton{
		Text:         r.T("btn.refresh"),
		CallbackData: fmt.Sprintf("dockerList_refresh:%d", page),
	})

	rows = append(rows, navRow)

	return &models.InlineKeyboardMarkup{
		InlineKeyboard: rows,
	}
}

// =========================
// 🎨 EMOJIS
// =========================

func stateEmoji(state string) string {
	switch state {
	case "running":
		return "🟢"
	case "exited":
		return "🔴"
	case "dead":
		return "🪦"
	case "restarting":
		return "🟡"
	case "paused":
		return "⏸️"
	default:
		return "⚪"
	}
}

/**************************************************************************************************************/
/**************************************************************************************************************/
/**************************************************************************************************************/
type ContainerDetailView struct {
	Container *docker.ContainerInspectInfo
	Page      int
}

func (r *Renderer) RenderContainerDetail(v ContainerDetailView) (string, *models.InlineKeyboardMarkup) {
	c := v.Container

	var sb strings.Builder

	// Header
	sb.WriteString(r.T("c.header", map[string]string{"name": capitalize(c.Name)}))
	sb.WriteString("\n")
	sb.WriteString(r.T("c.separator"))
	sb.WriteString("\n\n")

	// Basic info
	sb.WriteString(r.line("c.id", map[string]string{"id": c.ID}))
	sb.WriteString(r.line("c.image", map[string]string{"image": c.Image}))
	sb.WriteString(r.line("c.path", map[string]string{"path": c.Path}))
	sb.WriteString(r.line("c.command", map[string]string{"command": c.Command}))
	sb.WriteString(r.line("c.created", map[string]string{"created": formatTime(c.Created)}))

	// State
	sb.WriteString(r.line("c.state", map[string]string{
		"emoji": stateEmoji(c.State),
		"state": r.T(i18n.Key("d", "state", c.State)),
	}))

	// Health
	sb.WriteString(r.line("c.health", map[string]string{
		"emoji":  healthEmoji(c.Health),
		"health": r.T(i18n.Key("d", "health", c.Health)),
	}))

	// Stats
	sb.WriteString(r.line("c.restart", map[string]string{"count": fmt.Sprintf("%d", c.RestartCount)}))
	sb.WriteString(r.line("c.started", map[string]string{"started": formatTime(c.StartedAt)}))
	sb.WriteString(r.line("c.finished", map[string]string{"finished": formatTime(c.FinishedAt)}))

	// Ports
	if len(c.Ports) > 0 {
		sb.WriteString("\n" + r.T("c.ports") + "\n")
		for port, mapping := range c.Ports {
			sb.WriteString(fmt.Sprintf("   - %s → %s\n", port, mapping))
		}
	}

	// Mounts
	if len(c.Mounts) > 0 {
		sb.WriteString("\n" + r.T("c.mounts") + "\n")
		for _, m := range c.Mounts {
			sb.WriteString(fmt.Sprintf("   - %s\n", m))
		}
	}

	// Networks
	if len(c.Networks) > 0 {
		sb.WriteString("\n" + r.T("c.networks") + "\n")
		for _, n := range c.Networks {
			sb.WriteString(fmt.Sprintf("   - %s\n", n))
		}
	}

	keyboard := r.buildContainerDetailKeyboard(v)

	return sb.String(), keyboard
}

// =========================
// 🔘 KEYBOARD
// =========================

func (r *Renderer) buildContainerDetailKeyboard(v ContainerDetailView) *models.InlineKeyboardMarkup {
	c := v.Container
	page := v.Page
	var buttons [][]models.InlineKeyboardButton

	switch c.State {

	case "running":
		buttons = [][]models.InlineKeyboardButton{
			{
				{Text: r.T("btn.stop"), CallbackData: fmt.Sprintf("docker_action:stop:%s:%d", c.Name, page)},
				{Text: r.T("btn.restart"), CallbackData: fmt.Sprintf("docker_action:restart:%s:%d", c.Name, page)},
			},
			{
				{Text: r.T("btn.pause"), CallbackData: fmt.Sprintf("docker_action:pause:%s:%d", c.Name, page)},
			},
		}

	case "exited", "created":
		buttons = [][]models.InlineKeyboardButton{
			{
				{Text: r.T("btn.start"), CallbackData: fmt.Sprintf("docker_action:start:%s:%d", c.Name, page)},
			},
		}

	case "paused":
		buttons = [][]models.InlineKeyboardButton{
			{
				{Text: r.T("btn.resume"), CallbackData: fmt.Sprintf("docker_action:unpause:%s:%d", c.Name, page)},
				{Text: r.T("btn.stop"), CallbackData: fmt.Sprintf("docker_action:stop:%s:%d", c.Name, page)},
			},
		}

	default:
		buttons = [][]models.InlineKeyboardButton{
			{
				{Text: r.T("btn.restart"), CallbackData: fmt.Sprintf("docker_action:restart:%s:%d", c.Name, page)},
			},
		}
	}

	buttons = append(buttons, []models.InlineKeyboardButton{
		{Text: r.T("ui.back"), CallbackData: fmt.Sprintf("docker_back_list:%d", page)},
	})

	buttons = append(buttons, []models.InlineKeyboardButton{
		{Text: r.T("btn.logs"), CallbackData: fmt.Sprintf("logs:%s:%d", c.Name, page)},
		{Text: r.T("btn.refresh"), CallbackData: fmt.Sprintf("docker_action:refresh:%s:%d", c.Name, page)},
	})

	return &models.InlineKeyboardMarkup{
		InlineKeyboard: buttons,
	}
}

// =========================
// 🧩 HELPERS
// =========================

func (r *Renderer) line(key string, vars map[string]string) string {
	return r.T(key, vars) + "\n"
}

func formatTime(t any) string {
	if v, ok := t.(interface{ Format(string) string }); ok {
		return v.Format("2006-01-02 15:04:05")
	}
	return "-"
}

func capitalize(s string) string {
	if len(s) == 0 {
		return s
	}
	return strings.ToUpper(string(s[0])) + s[1:]
}

func healthEmoji(h string) string {
	switch h {
	case "healthy":
		return "✅"
	case "unhealthy":
		return "⚠️"
	case "starting":
		return "⏳"
	default:
		return "❓"
	}
}

/**************************************************************************************************************/
/**************************************************************************************************************/
/**************************************************************************************************************/

type ContainerLogsView struct {
	Container string
	Logs      string
	Page      int
	Tail      int
}

func (r *Renderer) RenderContainerLogs(v ContainerLogsView) (string, *models.InlineKeyboardMarkup) {
	const maxLen = 3500
	var sb strings.Builder

	if len(v.Logs) > maxLen {
		v.Logs = v.Logs[len(v.Logs)-maxLen:]

		sb.WriteString(r.T("logs.truncated"))
		sb.WriteString("\n\n")
	}

	sb.WriteString(r.T("logs.header", map[string]string{
		"name": v.Container,
	}))
	sb.WriteString("\n")
	sb.WriteString(r.T("ui.separator"))
	sb.WriteString("\n\n")

	if v.Logs == "" {
		sb.WriteString(r.T("logs.empty"))
	} else {
		sb.WriteString("<pre>")
		sb.WriteString(v.Logs)
		sb.WriteString("</pre>")
	}

	keyboard := r.buildLogsKeyboard(v)

	return sb.String(), keyboard
}

func (r *Renderer) buildLogsKeyboard(v ContainerLogsView) *models.InlineKeyboardMarkup {

	rows := [][]models.InlineKeyboardButton{
		{
			{
				Text:         r.T("btn.refresh"),
				CallbackData: fmt.Sprintf("logs_refresh:%s:%d:%d", v.Container, v.Page, v.Tail),
			},
		},
		{
			{
				Text:         r.T("ui.back"),
				CallbackData: fmt.Sprintf("logs_back_detail:%s:%d", v.Container, v.Page),
			},
		},
	}

	return &models.InlineKeyboardMarkup{
		InlineKeyboard: rows,
	}
}