import { describe, expect, it } from 'vitest';
import { isBound, pickSystemUse, toPublicView, validateBinding } from '../internal/domain/model-binding.ts';
import type { ModelBinding } from '../internal/domain/model-binding.ts';
import { callFingerprint, replayKey, stableStringify } from '../internal/domain/replay-key.ts';
import type { TaskId } from '@contracts';

const binding = (over: Partial<ModelBinding> = {}): ModelBinding => ({
  id: 'i1',
  name: 'quote-extractor',
  provider: 'openai-compatible',
  baseUrl: 'https://api.example.com/v1',
  model: 'gpt-4o-mini',
  apiKeyCipher: 'v1.aa.bb.cc',
  systemUse: false,
  enabled: true,
  ...over,
});

describe('validateBinding —— 四元齐备才算绑定', () => {
  it('四元齐备通过', () => {
    expect(validateBinding(binding())).toEqual([]);
    expect(isBound(binding())).toBe(true);
  });

  it('缺 API-Key 即未绑定', () => {
    const v = validateBinding(binding({ apiKeyCipher: undefined }));
    expect(v.map((x) => x.field)).toEqual(['apiKey']);
    expect(isBound(binding({ apiKeyCipher: undefined }))).toBe(false);
  });

  it('URL 必须是 http(s)', () => {
    expect(validateBinding(binding({ baseUrl: 'ftp://x' })).map((x) => x.field)).toEqual(['baseUrl']);
    expect(validateBinding(binding({ baseUrl: '' })).map((x) => x.field)).toEqual(['baseUrl']);
  });

  it('模型名不得为空', () => {
    expect(validateBinding(binding({ model: '  ' })).map((x) => x.field)).toEqual(['model']);
  });

  it('自定义模型名有字符集约束', () => {
    expect(validateBinding(binding({ name: '模型 一' })).map((x) => x.field)).toEqual(['name']);
  });
});

describe('toPublicView —— 结构上不可能泄漏密钥', () => {
  it('只回是否已绑定', () => {
    const view = toPublicView(binding());
    expect(view).toEqual({
      id: 'i1',
      name: 'quote-extractor',
      provider: 'openai-compatible',
      baseUrl: 'https://api.example.com/v1',
      model: 'gpt-4o-mini',
      apiKeyBound: true,
      systemUse: false,
      enabled: true,
    });
    expect(JSON.stringify(view)).not.toContain('v1.aa.bb.cc');
  });

  it('未绑定时 apiKeyBound = false', () => {
    expect(toPublicView(binding({ apiKeyCipher: '' })).apiKeyBound).toBe(false);
  });
});

describe('pickSystemUse', () => {
  it('取启用且标记系统用途的实例', () => {
    const picked = pickSystemUse([
      binding({ id: 'a', name: 'a', systemUse: false }),
      binding({ id: 'b', name: 'b', systemUse: true, enabled: false }),
      binding({ id: 'c', name: 'c', systemUse: true }),
    ]);
    expect(picked?.id).toBe('c');
  });

  it('没有即 undefined', () => {
    expect(pickSystemUse([])).toBeUndefined();
  });
});

describe('replayKey —— 按任务 × 步序号', () => {
  it('有任务与步序号时用定位键', () => {
    expect(replayKey({ model: 'm', prompt: 'p', taskId: 't1' as TaskId, stepNo: 3 })).toBe('task:t1#3');
  });

  it('缺定位时退到内容指纹,且同输入同键', () => {
    const a = replayKey({ model: 'm', prompt: 'p', temperature: 0 });
    const b = replayKey({ model: 'm', prompt: 'p', temperature: 0 });
    expect(a).toBe(b);
    expect(a.startsWith('fp:')).toBe(true);
  });

  it('不同 prompt 得不同键', () => {
    expect(replayKey({ model: 'm', prompt: 'p1' })).not.toBe(replayKey({ model: 'm', prompt: 'p2' }));
  });

  it('指纹不含凭证字段', () => {
    expect(callFingerprint({ model: 'm', prompt: 'p' })).not.toMatch(/key|token|authorization/i);
  });
});

describe('stableStringify —— 键排序,指纹不随属性顺序漂移', () => {
  it('对象键排序', () => {
    expect(stableStringify({ b: 1, a: 2 })).toBe(stableStringify({ a: 2, b: 1 }));
  });
  it('嵌套与数组', () => {
    expect(stableStringify({ a: [1, { d: 4, c: 3 }] })).toBe('{"a":[1,{"c":3,"d":4}]}');
  });
  it('null 与标量', () => {
    expect(stableStringify(null)).toBe('null');
    expect(stableStringify(3)).toBe('3');
  });
});

describe('系统用途:没人勾也要有着落(2026-07-30)', () => {
  const mk = (over: Partial<Parameters<typeof pickSystemUse>[0][number]>) => ({
    id: 'x',
    name: 'n',
    provider: 'deepseek' as const,
    baseUrl: 'https://api.deepseek.com',
    model: 'm',
    apiKeyCipher: 'cipher',
    systemUse: false,
    enabled: true,
    ...over,
  });

  it('勾了的优先', () => {
    const flagged = mk({ id: 'flagged', systemUse: true });
    expect(pickSystemUse([mk({ id: 'first' }), flagged])?.id).toBe('flagged');
  });

  it('一个没勾 → 取第一条能用的(启用且已绑密钥)', () => {
    const picked = pickSystemUse([mk({ id: 'nokey', apiKeyCipher: undefined }), mk({ id: 'off', enabled: false }), mk({ id: 'ok' })]);
    expect(picked?.id, '未绑密钥与已停用的都不算数').toBe('ok');
  });

  it('一条能用的都没有 → 如实返回 undefined,不硬凑一条', () => {
    expect(pickSystemUse([mk({ apiKeyCipher: undefined })])).toBeUndefined();
  });
});