#!/usr/bin/env bash
# Validate plugin marketplace manifests for Claude Code and GitHub Copilot CLI.
# Wraps `claude plugin validate` (Claude-side) and runs manual checks (Copilot-side).
#
# Usage:
#   validate.sh <repo-root>
#   validate.sh <repo-root> --plugin plugins/my-plugin

set -euo pipefail

RESERVED_NAMES="claude-code-marketplace claude-code-plugins claude-plugins-official
  claude-plugins-community claude-community anthropic-marketplace anthropic-plugins
  agent-skills anthropic-agent-skills knowledge-work-plugins life-sciences
  claude-for-legal claude-for-financial-services financial-services-plugins"

RESERVED_PATTERNS="official-claude anthropic-tools claude-official"

ERRORS=0
WARNINGS=0

error() { echo "ERROR: $1"; ((ERRORS++)) || true; }
warn()  { echo "WARN:  $1"; ((WARNINGS++)) || true; }

is_kebab_case() { [[ "$1" =~ ^[a-z0-9]+(-[a-z0-9]+)*$ ]]; }

is_reserved() {
  local name="$1"
  for n in $RESERVED_NAMES; do [[ "$name" == "$n" ]] && return 0; done
  for p in $RESERVED_PATTERNS; do [[ "$name" == "$p"* ]] && return 0; done
  return 1
}

validate_name() {
  local name="$1" context="$2"
  [[ -z "$name" ]] && { error "$context: name is missing or empty"; return 0; }
  is_kebab_case "$name" || error "$context: name '$name' is not kebab-case"
  if is_reserved "$name"; then
    error "$context: name '$name' is reserved for official Anthropic use"
  fi
  return 0
}

valid_json() {
  local path="$1"
  if ! jq -e . "$path" >/dev/null 2>&1; then
    error "Invalid JSON in $path"
    return 1
  fi
  return 0
}

validate_marketplace_json() {
  local path="$1"
  [[ -f "$path" ]] || return 0
  valid_json "$path" || return 0

  local name
  name=$(jq -r '.name // empty' "$path")
  [[ -z "$name" ]] && error "$path: 'name' field is required" || validate_name "$name" "$path"

  local plugins_type
  plugins_type=$(jq -r 'if .plugins | type == "array" then "ok" else "bad" end' "$path")
  if [[ "$plugins_type" != "ok" ]]; then
    error "$path: 'plugins' must be an array"
    return 0
  fi

  # Check each plugin entry
  local seen_names=()
  while IFS= read -r pname; do
    # Duplicate check
    for seen in "${seen_names[@]+"${seen_names[@]}"}"; do
      if [[ "$seen" == "$pname" ]]; then error "$path: duplicate plugin name '$pname'"; fi
    done
    seen_names+=("$pname")
    validate_name "$pname" "$path plugin '$pname'"

    # Source path check
    local src
    src=$(jq -r --arg n "$pname" '.plugins[] | select(.name==$n) | .source // empty' "$path")
    if [[ -n "$src" && "$src" != ./* && "$src" != "github" && "$src" != "npm" && "$src" != "url" && "$src" != "git-subdir" ]]; then
      warn "$path plugin '$pname': relative source '$src' should start with './' for Claude Code compatibility"
    fi

    # Version duplication warning
    local has_ver
    has_ver=$(jq -r --arg n "$pname" '.plugins[] | select(.name==$n) | .version // empty' "$path")
    if [[ -n "$has_ver" ]]; then
      warn "$path plugin '$pname': version set in marketplace entry. If also set in plugin.json, plugin.json wins silently."
    fi

  done < <(jq -r '.plugins[].name // empty' "$path")
  return 0
}

validate_plugin_json() {
  local path="$1" marketplace_json="${2:-}"
  [[ -f "$path" ]] || return 0
  valid_json "$path" || return 0

  local name
  name=$(jq -r '.name // empty' "$path")
  if [[ -z "$name" ]]; then
    warn "$path: 'name' field missing (plugin dir name will be used)"
  else
    validate_name "$name" "$path"

    # Version duplication check
    if [[ -n "$marketplace_json" && -f "$marketplace_json" ]]; then
      local pver mver
      pver=$(jq -r '.version // empty' "$path")
      mver=$(jq -r --arg n "$name" '.plugins[]? | select(.name==$n) | .version // empty' "$marketplace_json")
      if [[ -n "$pver" && -n "$mver" ]]; then
        error "$path: version '$pver' set in both plugin.json and marketplace entry — plugin.json wins silently. Remove one."
      fi
    fi
  fi
  return 0
}

validate_skill_md() {
  local path="$1"
  local content
  content=$(cat "$path")
  if [[ "$content" != ---* ]]; then
    warn "$path: SKILL.md has no YAML frontmatter"
    return
  fi
  if ! echo "$content" | awk 'NR>1 && /^---/' | grep -q '^---'; then
    error "$path: SKILL.md frontmatter not closed"
    return
  fi
  if ! echo "$content" | awk '/^---/{n++; if(n==2) exit} n==1' | grep -q 'description:'; then
    warn "$path: SKILL.md frontmatter missing 'description' field"
  fi
}

validate_plugin_dir() {
  local pd="$1" marketplace_json="${2:-}"

  local claude_manifest="$pd/.claude-plugin/plugin.json"
  local root_manifest="$pd/plugin.json"

  if [[ ! -f "$claude_manifest" && ! -f "$root_manifest" ]]; then
    warn "$pd: no plugin.json found (will auto-discover components)"
  else
    validate_plugin_json "$claude_manifest" "$marketplace_json"
    validate_plugin_json "$root_manifest" "$marketplace_json"

    # Sync check
    if [[ -f "$claude_manifest" && -f "$root_manifest" ]]; then
      if ! diff <(jq -S . "$claude_manifest") <(jq -S . "$root_manifest") >/dev/null 2>&1; then
        warn "$pd: .claude-plugin/plugin.json and plugin.json differ — keep them in sync"
      fi
    fi
  fi

  # Components must not be inside .claude-plugin/
  for bad_dir in skills agents hooks commands; do
    if [[ -d "$pd/.claude-plugin/$bad_dir" ]]; then
      error "$pd/.claude-plugin/$bad_dir: only plugin.json belongs in .claude-plugin/; move $bad_dir/ to plugin root"
    fi
  done

  # Validate SKILL.md files
  while IFS= read -r -d '' skill_md; do
    validate_skill_md "$skill_md"
  done < <(find "$pd" -name "SKILL.md" -print0 2>/dev/null)

  # Cross-reference check
  while IFS= read -r -d '' f; do
    if grep -q '\.\.\/' "$f" 2>/dev/null; then
      local rel="${f#"$pd/"}"
      error "$rel: contains '../' reference — plugins cannot access files outside their directory after caching"
    fi
  done < <(find "$pd" \( -name "*.md" -o -name "*.json" \) -print0 2>/dev/null)
}

run_claude_validate() {
  local path="$1"
  if command -v claude >/dev/null 2>&1; then
    if ! claude plugin validate "$path" 2>&1; then
      error "claude plugin validate failed for $path"
    fi
  else
    warn "'claude' CLI not found — skipping claude plugin validate"
  fi
}

# ── parse args ────────────────────────────────────────────────────────────────

ROOT=""
PLUGIN_ONLY=""

while [[ $# -gt 0 ]]; do
  case "$1" in
    --plugin) PLUGIN_ONLY="$2"; shift 2 ;;
    -*) echo "Unknown option: $1" >&2; exit 1 ;;
    *) ROOT="$1"; shift ;;
  esac
done

if [[ -z "$ROOT" ]]; then
  echo "Usage: validate.sh <repo-root> [--plugin <path>]" >&2
  exit 1
fi

ROOT="$(cd "$ROOT" && pwd)"

# ── validate marketplace.json ─────────────────────────────────────────────────

MARKETPLACE_JSON=""
for mp in "$ROOT/.claude-plugin/marketplace.json" "$ROOT/.github/plugin/marketplace.json"; do
  if [[ -f "$mp" ]]; then
    MARKETPLACE_JSON="$mp"
    validate_marketplace_json "$mp"
    break
  fi
done

if [[ -z "$MARKETPLACE_JSON" ]]; then
  warn "No marketplace.json found. Expected at .claude-plugin/marketplace.json"
fi

# ── validate plugins ──────────────────────────────────────────────────────────

if [[ -n "$PLUGIN_ONLY" ]]; then
  validate_plugin_dir "$(cd "$PLUGIN_ONLY" && pwd)" "$MARKETPLACE_JSON"
  run_claude_validate "$(cd "$PLUGIN_ONLY" && pwd)"
else
  plugins_path="$ROOT/plugins"
  if [[ -d "$plugins_path" ]]; then
    while IFS= read -r -d '' pd; do
      validate_plugin_dir "$pd" "$MARKETPLACE_JSON"
      run_claude_validate "$pd"
    done < <(find "$plugins_path" -mindepth 1 -maxdepth 1 -type d ! -name '.*' -print0 | sort -z)
  else
    warn "No plugins/ directory found at $ROOT"
  fi
fi

# ── check source paths resolve ────────────────────────────────────────────────

if [[ -n "$MARKETPLACE_JSON" ]]; then
  while IFS= read -r src; do
    [[ "$src" != ./* ]] && continue
    src_path="$ROOT/${src#./}"
    if [[ ! -d "$src_path" ]]; then error "Marketplace source path '$src' does not exist at $src_path"; fi
  done < <(jq -r '.plugins[]?.source | strings' "$MARKETPLACE_JSON" 2>/dev/null)
fi

# ── report ────────────────────────────────────────────────────────────────────

echo ""
if [[ $ERRORS -eq 0 && $WARNINGS -eq 0 ]]; then
  echo "✓ All checks passed."
  exit 0
elif [[ $ERRORS -eq 0 ]]; then
  echo "Passed with $WARNINGS warning(s)."
  exit 0
else
  echo "Failed. Fix $ERRORS error(s) before proceeding."
  exit 1
fi