#!/usr/bin/env bash
set -euo pipefail

OPENCODE_DIR="${HOME}/.config/opencode"
CI_DIR="$(cd "$(dirname "$0")/.." && pwd)/opencode"

UNINSTALL=false
FORCE=false

for arg in "$@"; do
  case "$arg" in
    --uninstall) UNINSTALL=true ;;
    --force) FORCE=true ;;
    --help|-h)
      echo "Usage: $(basename "$0") [--uninstall] [--force]"
      echo ""
      echo "Install CI opencode integration files to ~/.config/opencode/"
      echo ""
      echo "  --uninstall  Remove CI integration files"
      echo "  --force      Overwrite existing files without prompting"
      echo "  --help       Show this help"
      exit 0
      ;;
  esac
done

if [ "$UNINSTALL" = true ]; then
  echo "Uninstalling CI opencode integration..."
  
  rm -f "${OPENCODE_DIR}/agents/ci-"*.md 2>/dev/null || true
  rm -f "${OPENCODE_DIR}/command/ci-"*.md 2>/dev/null || true
  rm -rf "${OPENCODE_DIR}/ci/" 2>/dev/null || true
  
  echo "CI integration files removed."
  echo "Note: opencode.json permissions entry preserved (edit manually if needed)."
  exit 0
fi

if [ ! -d "$CI_DIR" ]; then
  echo "Error: opencode/ directory not found at ${CI_DIR}"
  echo "Ensure you're running from the CI repository root."
  exit 1
fi

echo "Installing CI opencode integration..."
echo "  Source: ${CI_DIR}"
echo "  Target: ${OPENCODE_DIR}"
echo ""

mkdir -p "${OPENCODE_DIR}/agents"
mkdir -p "${OPENCODE_DIR}/command"
mkdir -p "${OPENCODE_DIR}/ci/contexts"
mkdir -p "${OPENCODE_DIR}/ci/references"
mkdir -p "${OPENCODE_DIR}/ci/workflows"

COPIED=0
SKIPPED=0

copy_file() {
  local src="$1"
  local dest="$2"
  
  if [ -f "$dest" ] && [ "$FORCE" = false ]; then
    if cmp -s "$src" "$dest" 2>/dev/null; then
      SKIPPED=$((SKIPPED + 1))
      return
    fi
    echo "  Conflict: $(basename "$src") already exists. Use --force to overwrite."
    SKIPPED=$((SKIPPED + 1))
    return
  fi
  
  cp "$src" "$dest"
  COPIED=$((COPIED + 1))
}

echo "Installing agents..."
for f in "${CI_DIR}/agents/ci-"*.md; do
  [ -f "$f" ] && copy_file "$f" "${OPENCODE_DIR}/agents/$(basename "$f")"
done

echo "Installing commands..."
for f in "${CI_DIR}/command/ci-"*.md; do
  [ -f "$f" ] && copy_file "$f" "${OPENCODE_DIR}/command/$(basename "$f")"
done

echo "Installing contexts..."
for f in "${CI_DIR}/ci/contexts/"*.md; do
  [ -f "$f" ] && copy_file "$f" "${OPENCODE_DIR}/ci/contexts/$(basename "$f")"
done

echo "Installing references..."
for f in "${CI_DIR}/ci/references/"*.md; do
  [ -f "$f" ] && copy_file "$f" "${OPENCODE_DIR}/ci/references/$(basename "$f")"
done

echo "Installing workflows..."
for f in "${CI_DIR}/ci/workflows/"*.md; do
  [ -f "$f" ] && copy_file "$f" "${OPENCODE_DIR}/ci/workflows/$(basename "$f")"
done

echo "Installing VERSION..."
[ -f "${CI_DIR}/ci/VERSION" ] && copy_file "${CI_DIR}/ci/VERSION" "${OPENCODE_DIR}/ci/VERSION"

echo ""
echo "Merging opencode.json permissions..."
OPENCODE_JSON="${OPENCODE_DIR}/opencode.json"
CI_JSON="${CI_DIR}/opencode.json"

if [ -f "$CI_JSON" ]; then
  if [ ! -f "$OPENCODE_JSON" ]; then
    cp "$CI_JSON" "$OPENCODE_JSON"
    echo "  Created opencode.json"
  else
    if command -v node &>/dev/null; then
      node -e "
        const fs = require('fs');
        const existing = JSON.parse(fs.readFileSync('${OPENCODE_JSON}', 'utf8'));
        const ci = JSON.parse(fs.readFileSync('${CI_JSON}', 'utf8'));
        const merged = { ...existing };
        merged.permission = merged.permission || {};
        merged.permission.read = merged.permission.read || {};
        merged.permission.external_directory = merged.permission.external_directory || {};
        for (const [k, v] of Object.entries(ci.permission?.read || {})) {
          if (!merged.permission.read[k]) merged.permission.read[k] = v;
        }
        for (const [k, v] of Object.entries(ci.permission?.external_directory || {})) {
          if (!merged.permission.external_directory[k]) merged.permission.external_directory[k] = v;
        }
        fs.writeFileSync('${OPENCODE_JSON}', JSON.stringify(merged, null, 2));
        console.log('  Merged permissions (preserved existing entries)');
      "
    else
      echo "  Warning: node not found. Manually merge opencode.json permissions."
      echo "  Add to opencode.json:"
      echo '    "~/.config/opencode/ci/*": "allow" (in permission.read and permission.external_directory)'
    fi
  fi
fi

echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo " CI ► INSTALL COMPLETE"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo " Copied: ${COPIED} files"
echo " Skipped: ${SKIPPED} files"
echo ""
echo " Commands available: ci-init, ci-run, ci-quick, ci-status,"
echo "   ci-audit, ci-verify, ci-debug, ci-review, ci-ship,"
echo "   ci-rollback, ci-clarify"
echo ""
echo " Run --uninstall to remove."
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"