package main

import (
	"bytes"
	"context"
	"strconv"

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

// DonationCTABlockMeta defines metadata for the donation CTA block.
var DonationCTABlockMeta = blocks.BlockMeta{
	Key:         "donation_cta",
	Title:       "Donation CTA",
	Description: "Donation call-to-action with preset amount tiles and custom amount field",
	Source:      "earthen",
	Category:    blocks.CategoryContent,
}

// DonationCTABlock renders the donation call-to-action block.
// Content shape: {headline, body, amounts:[int], buttonLabel, processorUrl}
func DonationCTABlock(ctx context.Context, content map[string]any) string {
	amounts := getNumberSlice(content, "amounts")
	if len(amounts) == 0 {
		amounts = []float64{25, 50, 100}
	}

	tiles := make([]DonationTile, 0, len(amounts))
	for _, a := range amounts {
		tiles = append(tiles, DonationTile{
			Value: a,
			Label: "$" + strconv.FormatFloat(a, 'f', -1, 64),
		})
	}

	data := DonationCTAData{
		Headline:     getString(content, "headline"),
		Body:         getString(content, "body"),
		ButtonLabel:  getString(content, "buttonLabel"),
		ProcessorURL: getString(content, "processorUrl"),
		Tiles:        tiles,
		Empty:        len(content) == 0,
	}
	if data.ButtonLabel == "" {
		data.ButtonLabel = "Donate"
	}

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

// DonationCTAData contains data for the donation CTA component.
type DonationCTAData struct {
	Headline     string
	Body         string
	ButtonLabel  string
	ProcessorURL string
	Tiles        []DonationTile
	Empty        bool
}

// DonationTile is a single preset amount tile.
type DonationTile struct {
	Value float64
	Label string
}