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

# Install the 12 dev_agent_team opencode agents into a local opencode config.
#
# Usage:   ./scripts/install.sh
# Override target dir with: OPENCODE_AGENTS_DIR=/some/dir ./scripts/install.sh

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
TARGET="${OPENCODE_AGENTS_DIR:-$HOME/.config/opencode/agents}"
EXPECTED_COUNT=12

echo "==> dev_agent_team installer"
echo "==> Source:      $ROOT/agents"
echo "==> Destination: $TARGET"

mkdir -p "$TARGET"

STAMP="$(date +%Y%m%d_%H%M%S)"
BACKUP_DIR="$TARGET/.backup/$STAMP"

# Back up any pre-existing same-named files before touching them.
backed_up=0
for src_path in "$ROOT"/agents/*.md; do
  name="$(basename "$src_path")"
  if [[ -e "$TARGET/$name" ]]; then
    mkdir -p "$BACKUP_DIR"
    cp -p "$TARGET/$name" "$BACKUP_DIR/$name"
    echo "    backed up: $name -> .backup/$STAMP/$name"
    backed_up=$((backed_up + 1))
  fi
done

# Copy the agents.
copied=0
for src_path in "$ROOT"/agents/*.md; do
  name="$(basename "$src_path")"
  cp -p "$src_path" "$TARGET/$name"
  echo "    copied: $name"
  copied=$((copied + 1))
done

# Fail loudly if the expected set was not installed.
if (( copied != EXPECTED_COUNT )); then
  echo "ERROR: expected $EXPECTED_COUNT agent files, but installed $copied. Aborting." >&2
  exit 1
fi
echo "==> Installed $copied/$EXPECTED_COUNT agents."

if (( backed_up > 0 )); then
  echo "==> Previous versions of $backed_up file(s) saved under: $BACKUP_DIR"
fi

# Post-install reminder (non-fatal if opencode is absent).
if command -v opencode >/dev/null 2>&1; then
  echo "==> Reminder: restart opencode, then run: opencode agent list"
else
  echo "==> Note: 'opencode' not found on PATH; skipped restart/verify reminder."
fi

echo "==> Done."