#!/usr/bin/env bash
# 共用模块必须逐字节相同 —— 见 docs/PLUGIN-CONTRACT.md 第六节。
#
# 一侧改了另一侧没改，几个平台的行为就会悄悄分叉：同一封邮件在 opencode 那边
# 标了已读、在 DSH 那边没标，而两处代码看起来都"对"。
#
# 三方比对以 opencode 为基准逐个对比，而不是两两对比：后者在三方都不同时
# 会打出三条互相矛盾的差异，读的人无从判断谁是对的。
set -euo pipefail
BASE=plugins/opencode-mail-bridge
PEERS=(plugins/dsh-mail-bridge plugins/pi-mail-bridge)
fail=0

for peer in "${PEERS[@]}"; do
  for f in relay-dedup relay-policy relay-key permission-mode bounded inbox-format session-snapshot workspace model-scope catchup addressing discovery rename-proposal permission-grants adopt sse-client user-question; do
    if [[ ! -f "$peer/lib/$f.js" ]]; then
      echo "共用模块缺失：$peer/lib/$f.js" >&2
      fail=1
      continue
    fi
    if ! diff -q "$BASE/lib/$f.js" "$peer/lib/$f.js" >/dev/null 2>&1; then
      echo "共用模块已分叉：lib/$f.js（$BASE vs $peer）" >&2
      diff "$BASE/lib/$f.js" "$peer/lib/$f.js" | head -20 >&2
      fail=1
    fi
  done
  # 测试同样要同源：共用模块的行为约定写在测试里，
  # 只同步实现不同步测试，等于允许一侧偷偷放宽约定。
  for f in relay-policy relay-key permission-mode bounded inbox-format session-snapshot workspace model-scope catchup addressing discovery rename-proposal permission-grants adopt sse-client user-question; do
    if [[ ! -f "$peer/test/$f.test.mjs" ]]; then
      echo "共用测试缺失：$peer/test/$f.test.mjs" >&2
      fail=1
      continue
    fi
    if ! diff -q "$BASE/test/$f.test.mjs" "$peer/test/$f.test.mjs" >/dev/null 2>&1; then
      echo "共用测试已分叉：test/$f.test.mjs（$BASE vs $peer）" >&2
      fail=1
    fi
  done
done

[[ $fail -eq 0 ]] && echo "    共用模块三方同源（opencode / dsh / pi）" || exit 1