/**
 * Memorix — Cross-Agent Memory Bridge Plugin for OpenCode
 *
 * Automatically captures session context and tool usage,
 * piping events to `memorix hook` for cross-agent memory persistence.
 *
 * Generated by: memorix installHooks('opencode', projectRoot)
 * Docs: https://github.com/AVIDS2/memorix
 */
export const MemorixPlugin = async ({ project, client, $, directory, worktree }) => {
  console.log('[memorix] plugin loaded, directory:', directory);

  /** Pipe event JSON to memorix hook via temp file (Windows .cmd stdin workaround) */
  async function runHook(payload) {
    const tmpDir = Bun.env.TEMP || Bun.env.TMP || '/tmp';
    const tmpPath = `${tmpDir}/memorix-hook-${Date.now()}.json`;
    try {
      const data = JSON.stringify(payload);
      await Bun.write(tmpPath, data);
      // cat | pipe works through .cmd wrappers; < redirect does NOT
      await $`cat ${tmpPath} | memorix hook`.quiet().nothrow();
      console.log('[memorix] hook fired:', payload.hook_event_name);
    } catch (err) {
      console.log('[memorix] hook error:', err?.message ?? err);
    } finally {
      try { const { unlinkSync } = await import('node:fs'); unlinkSync(tmpPath); } catch {}
    }
  }

  return {
    /** Catch-all event handler for session lifecycle + file events */
    event: async ({ event }) => {
      if (event.type === 'session.created') {
        await runHook({
          agent: 'opencode',
          hook_event_name: 'session.created',
          cwd: directory,
        });
      } else if (event.type === 'session.idle') {
        await runHook({
          agent: 'opencode',
          hook_event_name: 'session.idle',
          cwd: directory,
        });
      } else if (event.type === 'file.edited') {
        await runHook({
          agent: 'opencode',
          hook_event_name: 'file.edited',
          file_path: event.properties?.path ?? '',
          cwd: directory,
        });
      } else if (event.type === 'command.executed') {
        await runHook({
          agent: 'opencode',
          hook_event_name: 'command.executed',
          command: event.properties?.command ?? '',
          cwd: directory,
        });
      }
    },

    /** Record tool usage after execution (hook, not event) */
    'tool.execute.after': async (input, output) => {
      await runHook({
        agent: 'opencode',
        hook_event_name: 'tool.execute.after',
        tool_name: input.tool,
        tool_input: input.args,
        cwd: directory,
      });
    },

    /** Inject memorix context into compaction prompt */
    'experimental.session.compacting': async (input, output) => {
      output.context.push(
        '## Memorix Cross-Agent Memory\n' +
        'Before compacting, use memorix_store to save important discoveries, decisions, and gotchas.\n' +
        'After compacting, use memorix_session_start to reload session context, then memorix_search for specific topics.'
      );
    },
  };
};