#!/usr/bin/env bash
# Regenerate internal/brand/icons_gen.go from Simple Icons.
#
# Simple Icons (https://simpleicons.org) is CC0 1.0: the icon paths are public
# domain. The marks themselves remain the trademarks of their owners and are
# used here only to identify the technology being described.
#
# This script runs at development time on a machine with network access. The
# generated Go file IS committed, so `make build` never needs the network, never
# needs Node and never needs node_modules. Re-run it only when the icon set
# changes:
#
#   tools/gen_brand_icons.sh
#
# Every icon is normalised to a 24x24 viewBox and inlined as path data, so the
# page carries no image request and the mark takes the chip's text colour.
set -euo pipefail

root="$(cd "$(dirname "$0")/.." && pwd)"
out="$root/internal/brand/icons_gen.go"
cdn="${SIMPLE_ICONS_CDN:-https://cdn.simpleicons.org}"

# slug:name as published by Simple Icons. Keep this list to marks the content
# actually uses; an unused icon is dead weight in the binary.
slugs=(
  javascript php python homeassistant raspberrypi nixos
  qdrant prefect n8n mqtt langgraph langchain
  ffmpeg zigbee threedotjs react proxmox mysql postgresql
  caddy tailscale neovim htmx go docker borgbackup
  sqlite spotify rabbitmq openrouter obsidian niri gitea ghostty
  googlegemini deepseek cplusplus typescript zsh minimax espressif
  grafana wireguard nginx hashicorp vault linux zig huggingface ollama
)

tmp="$(mktemp -d)"
trap 'rm -rf "$tmp"' EXIT

{
  echo "// Code generated by tools/gen_brand_icons.sh; DO NOT EDIT."
  echo "//"
  echo "// Path data from Simple Icons (CC0 1.0), retrieved from $cdn."
  echo "// Every mark is a 24x24 viewBox drawn in currentColor."
  echo
  echo "package brand"
  echo
  echo "// marks maps a Simple Icons slug to its path data."
  echo "var marks = map[string][]string{"
} > "$out"

for slug in "${slugs[@]}"; do
  if ! curl -fsS -m 20 -o "$tmp/$slug.svg" "$cdn/$slug"; then
    echo "gen_brand_icons: could not fetch $slug" >&2
    exit 1
  fi
  # One or more <path d="..."> elements; monochrome, so the path data is all we keep.
  mapfile -t paths < <(grep -o 'd="[^"]*"' "$tmp/$slug.svg" | sed 's/^d="//; s/"$//')
  if [ "${#paths[@]}" -eq 0 ]; then
    echo "gen_brand_icons: $slug has no path data" >&2
    exit 1
  fi
  printf '\t"%s": {\n' "$slug" >> "$out"
  for p in "${paths[@]}"; do
    printf '\t\t`%s`,\n' "$p" >> "$out"
  done
  printf '\t},\n' >> "$out"
done

echo "}" >> "$out"

gofmt -w "$out" 2>/dev/null || true
echo "gen_brand_icons: wrote $out (${#slugs[@]} marks)"