package main

import (
	"bytes"
	"context"

	"git.dev.alexdunmow.com/block/core/blocks"
)

// MissionStatBlockMeta defines metadata for the mission-stat block.
var MissionStatBlockMeta = blocks.BlockMeta{
	Key:         "mission_stat",
	Title:       "Mission Stat",
	Description: "Headline metric in mono numerals with a signal-orange delta arrow.",
	Source:      "scifi-clean",
	Category:    blocks.CategoryContent,
}

// MissionStatData drives the templ render.
type MissionStatData struct {
	Metric string
	Value  string
	Unit   string
	Delta  string
	Trend  string // "up", "down", "flat"
}

// MissionStatBlock renders the mission-stat block.
// Content shape: {"metric": "...", "value": "...", "unit": "...", "delta": "...", "trend": "up|down|flat"}
func MissionStatBlock(ctx context.Context, content map[string]any) string {
	data := MissionStatData{
		Metric: getString(content, "metric"),
		Value:  getString(content, "value"),
		Unit:   getString(content, "unit"),
		Delta:  getString(content, "delta"),
		Trend:  normalizeTrend(getString(content, "trend")),
	}

	var buf bytes.Buffer
	_ = missionStatComponent(data).Render(ctx, &buf)
	return buf.String()
}

// trendGlyph returns the arrow character for a given trend.
func trendGlyph(trend string) string {
	switch trend {
	case "up":
		return "↑" // ↑
	case "down":
		return "↓" // ↓
	default:
		return "→" // →
	}
}