import 'mocha'
import { assert } from 'chai'
import { getParseTreeFromString } from './helpers';

describe("Parsability tests", function() {
  describe("Parsable RDF strings", function() {
    describe("range", function() {
      var passing_runs = [
        { rdf: "$range$0$0$", desc: "epoch to epoch" },
        { rdf: "$range$0$now$", desc: "epoch to now" },
        { rdf: "$range$now$now$", desc: "now to now" },
        { rdf: "$range$0-1s$0+1s$", desc: "second offsets" },
        { rdf: "$range$0-1m$0+1m$", desc: "minute offsets" },
        { rdf: "$range$0-1h$0+1h$", desc: "hour offsets" },
        { rdf: "$range$0-1d$0+1d$", desc: "day offsets" },
        { rdf: "$range$0-1w$0+1w$", desc: "week offsets" },
        { rdf: "$range$0-1M$0+1M$", desc: "month offsets" },
        { rdf: "$range$0-1Q$0+1Q$", desc: "quarter offsets" },
        { rdf: "$range$0-1Y$0+1Y$", desc: "year offsets" },
        { rdf: "$range$0-1s+1m$0+1s-1m$", desc: "composite static offsets" },
        { rdf: "$range$0-1s+1M$0+1s-1M$", desc: "composite static/relative offsets" },
        { rdf: "$range$1020$174398127390$", desc: "long numbers" },
      ]

      for(let run of passing_runs) {
        it(`${run.rdf.replace(/\n/g,"\\n")}: ${run.desc} should parse a valid directive`, function(){
          getParseTreeFromString(run.rdf)
        })
      }
    })

    describe("trail", function() {
      var passing_runs = [
        { rdf: "$trail$0$0$", desc: "epoch by none" },
        { rdf: "$trail$0$now$", desc: "epoch by now" }, // weird case where timestamps can also be used as deltas
        { rdf: "$trail$now$now$", desc: "now to now" }, // weird case where timestamps can also be used as deltas
        { rdf: "$trail$0-1s$0+1s$", desc: "second offsets" },
        { rdf: "$trail$0-1m$0+1m$", desc: "minute offsets" },
        { rdf: "$trail$0-1h$0+1h$", desc: "hour offsets" },
        { rdf: "$trail$0-1d$0+1d$", desc: "day offsets" },
        { rdf: "$trail$0-1w$0+1w$", desc: "week offsets" },
        { rdf: "$trail$0-1M$0+1M$", desc: "month offsets" },
        { rdf: "$trail$0-1Q$0+1Q$", desc: "quarter offsets" },
        { rdf: "$trail$0-1Y$0+1Y$", desc: "year offsets" },
        { rdf: "$trail$0$1s$", desc: "static period in seconds" },
        { rdf: "$trail$0$1m$", desc: "static period in minutes" },
        { rdf: "$trail$0$1h$", desc: "static period in hours" },
        { rdf: "$trail$0$1d$", desc: "static period in days" },
        { rdf: "$trail$0$1w$", desc: "static period in weeks" },
        { rdf: "$trail$0$1M$", desc: "fully relative period in months" },
        { rdf: "$trail$0$1Q$", desc: "fully relative period in quarters" },
        { rdf: "$trail$0$1Y$", desc: "fully relative period in years" },
        { rdf: "$trail$0-1s+1m$0+1s-1m$", desc: "composite static offsets" },
        { rdf: "$trail$0-1s+1M$0+1s-1M$", desc: "composite static/relative offsets" },
        { rdf: "$trail$1020$174398127390$", desc: "long numbers" },
      ]

      for(let run of passing_runs) {
        it(`${run.rdf.replace(/\n/g,"\\n")}: ${run.desc} should parse a valid directive`, function(){
          getParseTreeFromString(run.rdf)
        })
      }
    })

  })

  describe("Invalid RDF strings", function(){
    var failing_runs = [
      { rdf: "$range$0$0", desc: "missing seperator" },
      { rdf: "$range$0$01s", desc: "no operator in static comparison" },
      { rdf: "$range$0$01Q", desc: "no operator in relative comparison" },
    ]

    for (let run of failing_runs) {
      it(`${run.rdf.replace(/\n/g,"\\n")}: should fail to parse a valid directive - ${run.desc}`, function(){
        assert.throws(() => { getParseTreeFromString(run.rdf) }, Error)
      })
    }
  })
})