import { describe, it, expect } from 'vitest';
import { readFileSync } from 'node:fs';
import { join } from 'node:path';
import {
  OPENCODE_SERVER_PLUGIN_SOURCE,
  OPENCODE_TUI_PLUGIN_SOURCE,
  OPENCODE_SERVER_PLUGIN_FILENAME,
  OPENCODE_TUI_PLUGIN_FILENAME,
} from '../../src/config/opencode-extension.js';

/**
 * `mcpctl config opencode` installs the *embedded* copy of the plugins, not the
 * files in src/opencode-ext/. Editing the sources without re-running the
 * generator therefore ships stale code to users while the repo looks correct —
 * and the embedded copy is the one thing no typecheck covers. Same guarantee
 * the completions check gives.
 */
const repoRoot = join(import.meta.dirname, '..', '..', '..', '..');
const extDir = join(repoRoot, 'src', 'opencode-ext');

describe('embedded opencode plugins', () => {
  it('match the sources in src/opencode-ext (re-run scripts/generate-opencode-extension.ts)', () => {
    expect(OPENCODE_SERVER_PLUGIN_SOURCE, 'server plugin is stale — regenerate the embed')
      .toBe(readFileSync(join(extDir, 'mcpctl-opencode.ts'), 'utf-8'));
    expect(OPENCODE_TUI_PLUGIN_SOURCE, 'TUI plugin is stale — regenerate the embed')
      .toBe(readFileSync(join(extDir, 'mcpctl-opencode-tui.tsx'), 'utf-8'));
  });

  it('install under names opencode can actually load', () => {
    // The server plugin is auto-discovered from plugin/*.ts; the TUI plugin is
    // referenced by path from tui.json and must stay .tsx for its JSX to be
    // transpiled.
    expect(OPENCODE_SERVER_PLUGIN_FILENAME).toBe('mcpctl.ts');
    expect(OPENCODE_TUI_PLUGIN_FILENAME).toBe('mcpctl-tui.tsx');
  });

  it('are self-contained — the installed files have no mcpctl imports to resolve', () => {
    for (const src of [OPENCODE_SERVER_PLUGIN_SOURCE, OPENCODE_TUI_PLUGIN_SOURCE]) {
      expect(src).not.toMatch(/from '@mcpctl\//);
      expect(src).not.toMatch(/from '\.\.\//);
    }
  });

  it('keep the JSX pragma the TUI plugin needs to render its indicator', () => {
    expect(OPENCODE_TUI_PLUGIN_SOURCE.startsWith('/** @jsxImportSource @opentui/solid */')).toBe(true);
  });

  it('agree on the MCP server name, so a switch re-points one mount instead of stacking two', () => {
    for (const src of [OPENCODE_SERVER_PLUGIN_SOURCE, OPENCODE_TUI_PLUGIN_SOURCE]) {
      expect(src).toContain("const SERVER_NAME = 'mcpctl'");
    }
  });

  it('agree on the state file both read', () => {
    for (const src of [OPENCODE_SERVER_PLUGIN_SOURCE, OPENCODE_TUI_PLUGIN_SOURCE]) {
      expect(src).toContain("join(homedir(), '.mcpctl', 'opencode-state.json')");
    }
  });

  it('spawn the CLI without a shell, so a project name is never interpolated into a command string', () => {
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("execFile('mcpctl', args");
    expect(OPENCODE_TUI_PLUGIN_SOURCE).not.toMatch(/\bexecSync\s*\(/);
    expect(OPENCODE_TUI_PLUGIN_SOURCE).not.toMatch(/\bexec\(`/);
  });

  it('sync skills into opencode’s own tree, never Claude’s', () => {
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("'--agent', 'opencode'");
  });

  it('bind the switcher to a chord as well as a slash command', () => {
    // Switching is the repeated action; typing /mcpctl every time is friction.
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("slashName: 'mcpctl'");
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("key: '<leader>m'");
  });

  it('tear the outgoing mount down before re-pointing it', () => {
    // An abandoned client keeps its mcp-session-id — and a gated project's
    // unlocked state — alive on mcplocal.
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain('mcp.disconnect({ name: SERVER_NAME })');
  });

  it('clip rather than wrap the footer label on the narrow home prompt', () => {
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain('wrapMode="none"');
  });

  it('switch without rewriting the plugin file opencode has already loaded', () => {
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("'--skip-plugin'");
    expect(OPENCODE_TUI_PLUGIN_SOURCE).toContain("'--skip-marker'");
  });
});