import { describe, expect, it } from 'bun:test'
import {
  DEFAULT_INTERVAL,
  addFileSubscription,
  addSubscription,
  listSubscriptions,
  providerNames,
  removeSubscription,
  subscriptionReferences,
  updateSubscription,
} from './providers.ts'
import { applySetup, chainProviderName } from './inbound-groups.ts'
import type { OutboundSetup } from './inbound-groups.ts'
import type { ConfigObject } from '../vendor/config-editor/index.ts'

const URL = 'http://127.0.0.1:3001/token/download/V2House'

/** 一份带一个订阅的配置，形状仿照目标机器上那份。 */
function base(): ConfigObject {
  return {
    'proxy-providers': {
      subs: {
        type: 'http',
        url: URL,
        path: './providers/subs.yaml',
        interval: 86400,
        'health-check': { enable: true, url: 'https://www.gstatic.com/generate_204', interval: 300 },
      },
    },
    'proxy-groups': [{ name: 'PROXY', type: 'select', proxies: ['DIRECT'], use: ['subs'] }],
  }
}

const chainedSetup: OutboundSetup = {
  proxy: { sources: ['subs'], filter: null },
  chain: { sources: ['subs'], filter: null },
}

describe('读出订阅列表', () => {
  it('读出地址、间隔和健康检查', () => {
    expect(listSubscriptions(base())).toEqual([
      {
        name: 'subs',
        type: 'http',
        path: './providers/subs.yaml',
        url: URL,
        interval: 86400,
        healthCheck: { url: 'https://www.gstatic.com/generate_204', interval: 300 },
      },
    ])
  })

  it('健康检查没写或没开都算未开启', () => {
    const data = base()
    const subs = (data['proxy-providers'] as ConfigObject).subs as ConfigObject
    delete subs['health-check']
    expect(listSubscriptions(data)[0]?.healthCheck).toBeNull()
    subs['health-check'] = { enable: false, url: 'https://example.com', interval: 60 }
    expect(listSubscriptions(data)[0]?.healthCheck).toBeNull()
  })

  it('不含 Patchbay 生成的订阅副本', () => {
    const data = applySetup(
      { ...base(), listeners: [{ name: 'test1', type: 'mixed', port: 7778 }] },
      'test1',
      chainedSetup,
    )
    expect(listSubscriptions(data).map((s) => s.name)).toEqual(['subs'])
    // 副本还在，只是不列出来
    expect(providerNames(data)).toContain(chainProviderName('test1', 'subs'))
  })

  it('没有 proxy-providers 段时是空列表', () => {
    expect(listSubscriptions({ mode: 'rule' })).toEqual([])
  })
})

describe('新增订阅', () => {
  it('自动生成缓存路径和默认间隔', () => {
    const next = addSubscription({}, 'subs2', URL)
    expect(next['proxy-providers']).toEqual({
      subs2: {
        type: 'http',
        url: URL,
        path: './providers/subs2.yaml',
        interval: DEFAULT_INTERVAL,
      },
    })
  })

  it('不动已有的订阅', () => {
    const data = base()
    const next = addSubscription(data, 'subs2', URL)
    expect((next['proxy-providers'] as ConfigObject).subs).toEqual(
      (data['proxy-providers'] as ConfigObject).subs,
    )
  })

  it('关掉自动更新时不写 interval 键', () => {
    const next = addSubscription({}, 'subs2', URL, null)
    const entry = (next['proxy-providers'] as ConfigObject).subs2 as ConfigObject
    expect('interval' in entry).toBe(false)
  })

  it('从文件导入的订阅是 file 类型，没有地址和间隔', () => {
    const next = addFileSubscription({}, 'subs2')
    expect(next['proxy-providers']).toEqual({
      subs2: { type: 'file', path: './providers/subs2.yaml' },
    })
  })
})

describe('编辑订阅', () => {
  it('只改地址和间隔，其余字段原样保留', () => {
    const next = updateSubscription(base(), 'subs', 'http://example.com/new', 3600)
    const entry = (next['proxy-providers'] as ConfigObject).subs as ConfigObject
    expect(entry.url).toBe('http://example.com/new')
    expect(entry.interval).toBe(3600)
    expect(entry.path).toBe('./providers/subs.yaml')
    expect(entry['health-check']).toEqual({
      enable: true,
      url: 'https://www.gstatic.com/generate_204',
      interval: 300,
    })
  })

  it('订阅不存在时不做改动', () => {
    const data = base()
    expect(updateSubscription(data, 'ghost', URL, 1)).toBe(data)
  })

  it('关掉自动更新时把已有的 interval 键去掉', () => {
    const next = updateSubscription(base(), 'subs', URL, null)
    const entry = (next['proxy-providers'] as ConfigObject).subs as ConfigObject
    expect('interval' in entry).toBe(false)
  })
})

describe('删除订阅', () => {
  it('从映射里去掉', () => {
    const data = addSubscription(base(), 'subs2', URL)
    const next = removeSubscription(data, 'subs2')
    expect(providerNames(next)).toEqual(['subs'])
  })

  it('删到最后一个时整个键去掉，不留空映射', () => {
    const next = removeSubscription(base(), 'subs')
    expect('proxy-providers' in next).toBe(false)
  })

  it('订阅不存在时不做改动', () => {
    const data = base()
    expect(removeSubscription(data, 'ghost')).toBe(data)
  })
})

describe('删除前的引用检查', () => {
  it('找出 use 它的策略组', () => {
    expect(subscriptionReferences(base(), 'subs')).toEqual(['PROXY'])
  })

  it('没人在用时是空列表', () => {
    const data = base()
    ;(data['proxy-groups'] as ConfigObject[])[0] = { name: 'PROXY', type: 'select', proxies: ['DIRECT'] }
    expect(subscriptionReferences(data, 'subs')).toEqual([])
  })

  it('链式代理的专属组 use 的是副本，也算引用原订阅', () => {
    const data = applySetup(
      { ...base(), listeners: [{ name: 'test1', type: 'mixed', port: 7778 }] },
      'test1',
      chainedSetup,
    )
    const refs = subscriptionReferences(data, 'subs')
    // 入口组直接 use 原订阅，三个专属组 use 副本，两边都要认出来
    expect(refs).toContain('patchbay:test1 链式')
    expect(refs).toContain('patchbay:test1')
  })

  it('订阅不存在时是空列表', () => {
    expect(subscriptionReferences(base(), 'ghost')).toEqual([])
  })
})