package tui

import (
	"fmt"
	"strings"

	"github.com/charmbracelet/lipgloss"
)

type hint struct {
	key  string
	desc string
}

func renderHints(hints []hint) string {
	parts := make([]string, len(hints))
	for i, h := range hints {
		parts[i] = hintKeyStyle.Render(h.key) + " " + hintDescStyle.Render(h.desc)
	}
	return strings.Join(parts, "  ")
}

func renderStatusBar(m model, width int) string {
	left := countText(m)
	if m.status != "" {
		left = m.status
	}
	right := renderHints(contextHints(m))

	leftRendered := statusStyle.Render(left)

	gap := width - lipgloss.Width(leftRendered) - lipgloss.Width(right)
	if gap < 0 {
		gap = 0
	}

	pad := lipgloss.NewStyle().Width(gap).Render("")
	return leftRendered + pad + right
}

func countText(m model) string {
	var total int
	if m.mode == modeCards {
		total = len(m.cards.filtered)
	} else {
		total = len(m.list.displayEntities())
	}
	if m.filterTag != "" {
		return fmt.Sprintf("%d entities #%s", total, m.filterTag)
	}
	return fmt.Sprintf("%d entities", total)
}

func contextHints(m model) []hint {
	switch m.state {
	case stateDetail:
		switch m.detail.mode {
		case detailRun:
			return []hint{{"space", "toggle"}, {"j/k", "nav"}, {"r", "reset"}, {"esc", "save+exit"}}
		case detailFill:
			return []hint{{"tab", "next"}, {"⇧tab", "prev"}, {"enter", "copy"}, {"esc", "cancel"}}
		default:
			return []hint{{"p", "promote"}, {"D", "demote"}, {"c", "copy"}, {"e", "edit"}, {"r", "run"}, {"f", "fill"}, {"!", "pin"}, {"esc", "back"}}
		}
	case stateInput:
		return nil
	case stateTagFilter:
		return []hint{{"j/k", "nav"}, {"enter", "select"}, {"esc", "cancel"}}
	case stateConfirm:
		return []hint{{"y", "confirm"}, {"n", "cancel"}}
	case statePromote:
		return []hint{{"j/k", "nav"}, {"enter", "select"}, {"esc", "cancel"}}
	case stateAbsorb:
		return []hint{{"j/k", "nav"}, {"enter", "absorb"}, {"esc", "cancel"}}
	default:
		if m.splitDetail {
			if m.focus == focusDetail {
				return []hint{{"h", "list"}, {"c", "copy"}, {"e", "edit"}, {"p", "promote"}, {"D", "demote"}, {"!", "pin"}, {"esc", "back"}}
			}
			return []hint{{"l", "detail"}, {"a", "add"}, {"d", "del"}, {"#", "filter"}, {"esc", "close"}, {"?", "help"}, {"q", "quit"}}
		}
		if m.mode == modeCards {
			return []hint{{"1", "stream"}, {"2", "cards"}, {"s", "sort"}, {"tab", "intent"}, {"a", "add"}, {"?", "help"}, {"q", "quit"}}
		}
		return []hint{{"1", "stream"}, {"2", "cards"}, {"a", "add"}, {"?", "search"}, {"m", "absorb"}, {"d", "del"}, {"#", "filter"}, {"?", "help"}, {"q", "quit"}}
	}
}