import type { BlockView } from '../blockView'
import { describe, expect, it } from 'vitest'
import { toBlockViews } from '../blockView'
import { blockMarks } from '../diff/viewDiff'
import { rustImplRule } from '../rules/rustImpl'
import { readFixture, viewLines, WASM_DIR, withBlocks } from '../testSupport'
import { rustZhTranslator } from '../translators/rustZh'
import { createRustAdapter } from './rust'

const adapter = createRustAdapter(WASM_DIR)
const sample = readFixture('rustLang.rs')

function views(source: string): Promise<BlockView[]> {
  return withBlocks(adapter, 'rust', source, blocks =>
    toBlockViews(blocks, { source, language: adapter, markers: [] }, rustZhTranslator, {
      rules: [rustImplRule],
      report: () => {},
    }))
}

function card(list: BlockView[], kind: string): BlockView {
  const found = list.find(block => block.kind === kind)
  if (!found)
    throw new Error(`没有 ${kind}`)
  return found
}

describe('rust 语言卡片', () => {
  it('use、结构体、枚举、实现、函数、特质', async () => {
    expect(viewLines(await views(sample))).toEqual([
      'import 1',
      '  来源: serde',
      '  导入项: 1 个',
      '    Serialize | —',
      'import 2',
      '  来源: std::sync',
      '  导入项: 1 个',
      '    Arc | —',
      'import 3',
      '  来源: foo',
      '  导入项: 2 个',
      '    Bar | Baz',
      '    Qux | —',
      'class 5',
      '  名称: AgentRow',
      '  说明: 桌面端列表里的一行代理。',
      '  可见性: 公开',
      '  字段: 2 个',
      '    id | Uuid | 公开',
      '    name | String | 本模块',
      'class 12',
      '  名称: CrateOnly',
      '  可见性: 本 crate',
      '  字段: 1 个',
      '    up | u8 | 父模块',
      'enum 16',
      '  名称: AgentState',
      '  说明: 这个代理现在处在哪一步。',
      '  变体: 3 个',
      '    Idle | —',
      '    Running | { pid: u32 }',
      '    Failed | String',
      'rust.impl 23',
      '  名称: AgentRow 的方法',
      '  方法: 1 个',
      '    rename | &mut self, name: String | ()',
      '  function 24',
      '    名称: rename',
      '    可见性: 本模块',
      '    参数: 2 个',
      '      self | &mut self',
      '      name | String',
      '    返回: ()',
      'function 27',
      '  名称: start_server',
      '  说明: 在本机拉起接口服务。',
      '  异步: 是',
      '  可见性: 公开',
      '  输入参数: 1 个',
      '    addr | SocketAddr',
      '  返回: Result<(), StartError>',
      '  分情况: 2 支',
      '    Ok(listener) | 记下监听地址',
      '    Err(err) | 返回 StartError',
      'trait 41',
      '  名称: Store',
      '  说明: 按 id 读写代理。',
      '  方法: 2 个',
      '    get | &self, id: Uuid | Result<AgentRow, StoreError>',
      '    save | &mut self, row: AgentRow | Result<(), StoreError>',
    ])
  })

  it('实现的方法放进方法表那一行', async () => {
    const impl = card(await views(sample), 'rust.impl')
    const [method] = impl.children
    expect(method?.slot).toEqual({ row: 1, item: 0 })
  })

  it('给结构体加一个字段，多出来的那一行标成新增', async () => {
    const before = 'pub struct AgentRow {\n    name: String,\n}\n'
    const after = 'pub struct AgentRow {\n    name: String,\n    id: Uuid,\n}\n'
    const [oldCard] = await views(before)
    const [newCard] = await views(after)
    const marks = oldCard && newCard ? blockMarks(oldCard, newCard) : undefined
    const field = newCard && 'properties' in newCard ? newCard.properties.findIndex(row => row.label === '字段') : -1
    expect(field).toBeGreaterThanOrEqual(0)
    expect(marks?.rows?.changed[field]).toEqual({
      items: { changed: { 1: { added: true } }, removed: [] },
    })
  })

  it('带身体的模块拆成子块，常量和外部函数是卡片', async () => {
    const source = [
      '/// 平台相关。',
      'pub mod platform {',
      '    /// 读入。',
      '    use std::io::Read;',
      '    /// 上限。',
      '    pub const LIMIT: u32 = 8;',
      '    static NAME: &str = "a";',
      '    pub fn open() -> u32 { LIMIT }',
      '    extern "C" {',
      '        /// 外部。',
      '        pub fn bar(x: i32) -> i32;',
      '    }',
      '    let local = 1;',
      '    println!("hi");',
      '}',
      'mod other;',
      '',
      'impl Agent {',
      '    pub const N: u8 = 2;',
      '}',
      '',
    ].join('\n')
    const list = await views(source)
    const mod = list.find(block => block.kind === 'module')
    expect(mod?.kind).toBe('module')
    expect(list.some(block => block.kind === 'statement' && block.code.includes('const LIMIT'))).toBe(false)
    expect(list.filter(block => block.kind === 'statement').map(block => block.code)).toEqual(['mod other;'])
    expect(mod?.children.map(block => block.kind)).toEqual(['import', 'const', 'variable', 'function', 'function', 'statement', 'statement'])
    expect(viewLines(mod ? [mod] : [])).toEqual([
      'module 1',
      '  名称: platform',
      '  说明: 平台相关。',
      '  可见性: 公开',
      '  import 3',
      '    来源: std::io',
      '    导入项: 1 个',
      '      Read | —',
      '  const 5',
      '    名称: LIMIT',
      '    说明: 上限。',
      '    访问级别: 公共',
      '    类型: u32',
      '    值: 8',
      '  variable 7',
      '    名称: NAME',
      '    类型: &str',
      '    初始值: "a"',
      '  function 8',
      '    名称: open',
      '    可见性: 公开',
      '    返回: u32',
      '  function 10',
      '    名称: bar',
      '    说明: 外部。',
      '    可见性: 公开',
      '    输入参数: 1 个',
      '      x | i32',
      '    返回: i32',
      '  statement 13: 令 local = 1;',
      '  statement 14: println!("hi")',
    ])
    const impl = list.find(block => block.kind === 'rust.impl')
    const inner = impl?.children.find(block => block.kind === 'const')
    expect(inner?.kind).toBe('const')
    expect(viewLines(inner ? [inner] : []).join('\n')).toContain('名称: N')
    expect(viewLines(inner ? [inner] : []).join('\n')).toMatch(/类型: u8|值: 2/)
  })
})