package main

import (
	"bytes"
	"context"

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

// AsciiHeaderBlockMeta defines metadata for the TTY ascii header block.
var AsciiHeaderBlockMeta = blocks.BlockMeta{
	Key:         "ascii_header",
	Title:       "ASCII Header",
	Description: "Figlet-style TTY banner with a shell prompt line",
	Source:      "terminal",
	Category:    blocks.CategoryLayout,
}

// AsciiHeaderData is the parsed content for the ascii_header block.
type AsciiHeaderData struct {
	Title    string
	Prompt   string
	AsciiArt string
}

// AsciiHeaderBlock renders the TTY banner.
// Content shape: {title, prompt, asciiArt}.
func AsciiHeaderBlock(ctx context.Context, content map[string]any) string {
	data := AsciiHeaderData{
		Title:    getString(content, "title"),
		Prompt:   getString(content, "prompt"),
		AsciiArt: getString(content, "asciiArt"),
	}
	// Sensible empty-state defaults so unconfigured blocks still render
	// something terminal-flavoured rather than an empty surface.
	if data.Title == "" && data.AsciiArt == "" {
		data.Title = "~"
	}
	if data.Prompt == "" {
		data.Prompt = "$ "
	}

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