chai = require 'chai'
should = chai.should()

describe 'Conditions', ->
  Conditions = require '../src/conditions'
  U2 = require 'uglify-js'
  testCond = (condition, request, should_match) ->
    o_request = request
    should_match = !!should_match
    if typeof request == 'string'
      request = Conditions.requestFromUrl(request)

    matchResult = Conditions.match(condition, request)
    condExpr = Conditions.compile(condition, request)
    testFunc = new U2.AST_Function(
      argnames: [
        new U2.AST_SymbolFunarg name: 'url'
        new U2.AST_SymbolFunarg name: 'host'
        new U2.AST_SymbolFunarg name: 'scheme'
      ]
      body: [
        new U2.AST_Return value: condExpr
      ]
    )
    testFunc = eval '(' + testFunc.print_to_string() + ')'
    compileResult = testFunc(request.url, request.host, request.scheme)

    friendlyError = (compiled) ->
      # Try to give friendly assert messages instead of something like
      # "expect true to be false".
      printCond = JSON.stringify(condition)
      printCompiled = if compiled then 'COMPILED ' else ''
      printMatch = if should_match then 'to match' else 'not to match'
      msg = ("expect #{printCompiled}condition #{printCond} " +
             "#{printMatch} request #{o_request}")
      chai.assert(false, msg)

    if matchResult != should_match
      friendlyError()

    if compileResult != should_match
      friendlyError('compiled')

    return matchResult

  describe 'TrueCondition', ->
    it 'should always return true', ->
      testCond({conditionType: 'TrueCondition'}, {}, 'match')
  describe 'FalseCondition', ->
    it 'should always return false', ->
      testCond({conditionType: 'FalseCondition'}, {}, not 'match')
  describe 'UrlRegexCondition', ->
    cond =
      conditionType: 'UrlRegexCondition'
      pattern: 'example\\.com'
    it 'should match requests based on regex pattern', ->
      testCond(cond, 'http://www.example.com/', 'match')
    it 'should not match requests not matching the pattern', ->
      testCond(cond, 'http://www.example.net/', not 'match')
    it 'should support regex meta chars', ->
      con =
        conditionType: 'UrlRegexCondition'
        pattern: 'exam.*\\.com'
      testCond(con, 'http://www.example.com/', 'match')
    it 'should fallback to not match if pattern is invalid', ->
      con =
        conditionType: 'UrlRegexCondition'
        pattern: ')Invalid('
      testCond(con, 'http://www.example.com/', not 'match')
  describe 'UrlWildcardCondition', ->
    cond =
      conditionType: 'UrlWildcardCondition'
      pattern: '*example.com*'
    it 'should match requests based on wildcard pattern', ->
      testCond(cond, 'http://www.example.com/', 'match')
    it 'should not match requests not matching the pattern', ->
      testCond(cond, 'http://www.example.net/', not 'match')
    it 'should support wildcard question marks', ->
      cond =
        conditionType: 'UrlWildcardCondition'
        pattern: '*exam???.com*'
      testCond(cond, 'http://www.example.com/', 'match')
    it 'should not support regex meta chars', ->
      cond =
        conditionType: 'UrlWildcardCondition'
        pattern: '.*example.com.*'
      testCond(cond, 'http://example.com/', not 'match')
    it 'should support multiple patterns in one condition', ->
      cond =
        conditionType: 'UrlWildcardCondition'
        pattern: '*.example.com/*|*.example.net/*'
      testCond(cond, 'http://a.example.com/abc', 'match')
      testCond(cond, 'http://b.example.net/def', 'match')
      testCond(cond, 'http://c.example.org/ghi', not 'match')
  describe 'HostRegexCondition', ->
    cond =
      conditionType: 'HostRegexCondition'
      pattern: '.*\\.example\\.com'
    it 'should match requests based on regex pattern', ->
      testCond(cond, 'http://www.example.com/', 'match')
    it 'should not match requests not matching the pattern', ->
      testCond(cond, 'http://example.com/', not 'match')
    it 'should not match URL parts other than the host', ->
      testCond(cond, 'http://example.net/www.example.com')
        .should.be.false

  describe 'HostWildcardCondition', ->
    cond =
      conditionType: 'HostWildcardCondition'
      pattern: '*.example.com'
    it 'should match requests based on wildcard pattern', ->
      testCond(cond, 'http://www.example.com/', 'match')
    it 'should also match hostname without the optional level', ->
      # https://github.com/FelisCatus/SwitchyOmega/wiki/Host-wildcard-condition
      testCond(cond, 'http://example.com/', 'match')
    it 'should allow override of the magical behavior', ->
      con =
        conditionType: 'HostWildcardCondition'
        pattern: '**.example.com'
      testCond(con, 'http://www.example.com/', 'match')
      testCond(con, 'http://example.com/', not 'match')
    it 'should not match URL parts other than the host', ->
      testCond(cond, 'http://example.net/www.example.com')
        .should.be.false
    it 'should support multiple patterns in one condition', ->
      cond =
        conditionType: 'HostWildcardCondition'
        pattern: '*.example.com|*.example.net'
      testCond(cond, 'http://a.example.com/abc', 'match')
      testCond(cond, 'http://example.net/def', 'match')
      testCond(cond, 'http://c.example.org/ghi', not 'match')

  describe 'BypassCondition', ->
    # See https://developer.chrome.com/extensions/proxy#bypass_list
    it 'should correctly support patterns containing hosts', ->
      cond =
        conditionType: 'BypassCondition'
        pattern: '.example.com'
      testCond(cond, 'http://www.example.com/', 'match')
      testCond(cond, 'http://example.com/', not 'match')
      cond.pattern = '*.example.com'
      testCond(cond, 'http://www.example.com/', 'match')
      testCond(cond, 'http://example.com/', not 'match')
      cond.pattern = 'example.com'
      testCond(cond, 'http://example.com/', 'match')
      testCond(cond, 'http://www.example.com/', not 'match')
      cond.pattern = '*example.com'
      testCond(cond, 'http://example.com/', 'match')
      testCond(cond, 'http://www.example.com/', 'match')
      testCond(cond, 'http://anotherexample.com/', 'match')
    it 'should match the scheme specified in the pattern', ->
      cond =
        conditionType: 'BypassCondition'
        pattern: 'http://example.com'
      testCond(cond, 'http://example.com/', 'match')
      testCond(cond, 'https://example.com/', not 'match')
    it 'should match the port specified in the pattern', ->
      cond =
        conditionType: 'BypassCondition'
        pattern: 'http://example.com:8080'
      testCond(cond, 'http://example.com:8080/', 'match')
      testCond(cond, 'http://example.com:888/', not 'match')
    it 'should correctly support patterns using IPv4 literals', ->
      cond =
        conditionType: 'BypassCondition'
        pattern: 'http://127.0.0.1:8080'
      testCond(cond, 'http://127.0.0.1:8080/', 'match')
      testCond(cond, 'http://127.0.0.2:8080/', not 'match')
    # TODO(felis): Not yet supported. See the code for BypassCondition.
    it 'should correctly support IPv6 canonicalization', ->
      cond =
        conditionType: 'BypassCondition'
        pattern: 'http://[0:0::1]:8080'
      result = Conditions.analyze(cond)
      console.log(result.analyzed)
      testCond(cond, 'http://[::1]:8080/', 'match')
      testCond(cond, 'http://[1::1]:8080/', not 'match')

  describe 'KeywordCondition', ->
    cond =
      conditionType: 'KeywordCondition'
      pattern: 'example.com'
    it 'should match requests based on substring', ->
      testCond(cond, 'http://www.example.com/', 'match')
      testCond(cond, 'http://www.example.net/', not 'match')
    it 'should not match HTTPS requests', ->
      testCond(cond, 'https://example.com/', not 'match')
      testCond(cond, 'https://example.net/', not 'match')