package ui

import (
	"fmt"
	"time"

	"github.com/ryanhamamura/c4/game"
	"github.com/ryanhamamura/via/h"
)

type GameListItem struct {
	ID           string
	Status       int
	OpponentName string
	IsMyTurn     bool
	LastPlayed   time.Time
}

func GameList(games []GameListItem, deleteClick func(id string) h.H) h.H {
	if len(games) == 0 {
		return nil
	}

	var items []h.H
	for _, g := range games {
		items = append(items, gameListEntry(g, deleteClick))
	}

	listItems := []h.H{h.Class("flex flex-col gap-2")}
	listItems = append(listItems, items...)

	return h.Div(h.Class("mt-8 text-left"),
		h.H3(h.Class("mb-4 text-center text-lg font-bold"), h.Text("Your Games")),
		h.Div(listItems...),
	)
}

func gameListEntry(g GameListItem, deleteClick func(id string) h.H) h.H {
	statusText, statusClass := getStatusDisplay(g)

	return h.Div(h.Class("flex items-center gap-2 p-2 bg-base-200 rounded-lg transition-colors hover:bg-base-300"),
		h.A(
			h.Href("/game/"+g.ID),
			h.Class("flex-1 flex justify-between items-center px-2 py-1 no-underline text-base-content"),
			h.Div(h.Class("flex flex-col gap-1"),
				h.Span(h.Class("font-bold"), h.Text(getOpponentDisplay(g))),
				h.Span(h.Class(statusClass), h.Text(statusText)),
			),
			h.Div(
				h.Span(h.Class("text-xs opacity-60"), h.Text(formatTimeAgo(g.LastPlayed))),
			),
		),
		h.Button(
			h.Type("button"),
			h.Class("btn btn-ghost btn-sm btn-square hover:btn-error"),
			h.Text("\u00d7"),
			deleteClick(g.ID),
		),
	)
}

func getStatusDisplay(g GameListItem) (string, string) {
	switch game.GameStatus(g.Status) {
	case game.StatusWaitingForPlayer:
		return "Waiting for opponent", "text-sm opacity-60"
	case game.StatusInProgress:
		if g.IsMyTurn {
			return "Your turn!", "text-sm text-success font-bold"
		}
		return "Opponent's turn", "text-sm"
	}
	return "", ""
}

func getOpponentDisplay(g GameListItem) string {
	if g.OpponentName == "" {
		return "Waiting for opponent..."
	}
	return "vs " + g.OpponentName
}

func formatTimeAgo(t time.Time) string {
	if t.IsZero() {
		return ""
	}
	duration := time.Since(t)

	if duration < time.Minute {
		return "just now"
	}
	if duration < time.Hour {
		mins := int(duration.Minutes())
		if mins == 1 {
			return "1 minute ago"
		}
		return fmt.Sprintf("%d minutes ago", mins)
	}
	if duration < 24*time.Hour {
		hours := int(duration.Hours())
		if hours == 1 {
			return "1 hour ago"
		}
		return fmt.Sprintf("%d hours ago", hours)
	}
	days := int(duration.Hours() / 24)
	if days == 1 {
		return "yesterday"
	}
	return fmt.Sprintf("%d days ago", days)
}