#!/usr/bin/env bash
# =============================================================================
# lib/scaffold.sh
# Directory structure creation and template rendering engine.
# =============================================================================

# Canonical directory layout lives in one place (lib/structure.sh).
source "$(dirname "${BASH_SOURCE[0]}")/structure.sh"

render_template() {
  local template_file="$1"
  local output_file="$2"

  [[ ! -f "$template_file" ]] && { error "Template not found: ${template_file}"; return 1; }

  local content
  content=$(<"$template_file")

  # HARDENING: collapse any “spaced” placeholders from a formatter
  #   { { KEY } }  ->  {{KEY}}   (KEY = UPPERCASE/underscore)
  # Defense in depth: if Prettier or a copy-paste breaks the syntax again,
  # the scaffold fixes itself. sed is a core utility (like tr/date already used here).
  content=$(sed -E 's/\{[[:space:]]*\{[[:space:]]*([A-Z_]+)[[:space:]]*\}[[:space:]]*\}/{{\1}}/g' <<<"$content")

  # Defaults (:-) so master-repo templates render even when GENOME_* are unset
  # (scaffold_master runs before any genome; set -u would otherwise abort here).
  local genome_name_upper
  genome_name_upper=$(tr '[:lower:]' '[:upper:]' <<< "${GENOME_NAME:-}")

  # Placeholder replacement
  content="${content//\{\{GENOME_NAME\}\}/${GENOME_NAME:-}}"
  content="${content//\{\{GENOME_NAME_UPPER\}\}/${genome_name_upper}}"
  content="${content//\{\{GENOME_DESC\}\}/${GENOME_DESC:-}}"
  content="${content//\{\{FORGEJO_URL\}\}/${FORGEJO_URL:-}}"
  content="${content//\{\{FORGEJO_USER\}\}/${FORGEJO_USER:-}}"
  content="${content//\{\{VAULTWARDEN_URL\}\}/${VAULTWARDEN_URL:-}}"
  content="${content//\{\{MASTER_REPO\}\}/${MASTER_REPO:-}}"
  # linked project reference (optional) — empty registry field renders as 'none'
  content="${content//\{\{LINKED_PROJECT\}\}/${GENOME_LINKED:-none}}"
  content="${content//\{\{DATE\}\}/$(date +%Y-%m-%d)}"

  mkdir -p "$(dirname "$output_file")"
  printf '%s\n' "$content" > "$output_file"
}

scaffold_genome() {
  local base="$1"

  info "Building directory structure in ${base}..."
  for dir in "${GENOME_DIRS[@]}"; do
    mkdir -p "${base}/${dir}"
    touch "${base}/${dir}/.gitkeep"
  done

  # Core templates
  render_template "${TEMPLATES_DIR}/gitattributes"    "${base}/.gitattributes"
  render_template "${TEMPLATES_DIR}/gitignore"        "${base}/.gitignore"
  render_template "${TEMPLATES_DIR}/agents-genome.md" "${base}/AGENTS.md"
  render_template "${TEMPLATES_DIR}/wiki-index.md"    "${base}/wiki/index.md"
  render_template "${TEMPLATES_DIR}/wiki-log.md"      "${base}/wiki/log.md"

  success "Scaffold completed for genome: ${GENOME_NAME}"
}

install_precommit_hook() {
  local repo_path="$1"
  local hooks_dir
  hooks_dir="$(git -C "$repo_path" rev-parse --git-path hooks)"
  local hook_path="${hooks_dir}/pre-commit"

  mkdir -p "$hooks_dir"
  cp "${TEMPLATES_DIR}/pre-commit.sh" "$hook_path"
  chmod +x "$hook_path"
  success "Pre-commit security hook installed at: $hook_path"
}

scaffold_master() {
  local base="$1"
  render_template "${TEMPLATES_DIR}/agents-master.md" "${base}/AGENTS.md"
  render_template "${TEMPLATES_DIR}/readme-master.md"  "${base}/README.md"
  success "Master repository scaffold completed."
}