import unittest
import pathlib
import io
import datetime
import numpy as np

import icartt

try:
    from _utils import compareFiles  # we're executing from the directory of this script
except ImportError:
    from ._utils import compareFiles  # we're executing from another directory

# working directory, example files
wd = pathlib.Path(__file__).parent


class Simple1001TestCase(unittest.TestCase):
    def setUp(self):
        self.fn = wd / "example_data" / "expect_ok" / "NOx_RHBrown_20040830_R0.ict"
        self.nHeader = 41

    def tearDown(self):
        pass

    def testOpen(self):
        ict = icartt.Dataset(self.fn, loadData=False)
        self.assertEqual(type(ict), icartt.Dataset)

    def testFormat(self):
        ict = icartt.Dataset(self.fn, loadData=False)
        self.assertEqual(ict.format, icartt.Formats.FFI1001)

    def testN(self):
        ict = icartt.Dataset(self.fn, loadData=False)
        self.assertEqual(ict.nHeader, self.nHeader)
        self.assertEqual(len(ict.dependentVariables), 9)
        self.assertEqual(len(ict.normalComments), 18)
        self.assertEqual(len(ict.specialComments), 0)

    def testIvar(self):
        ict = icartt.Dataset(self.fn, loadData=False)
        self.assertEqual(ict.independentVariable.shortname, "Start_UTC")
        self.assertEqual(ict.independentVariable.units, "seconds")
        self.assertEqual(
            ict.independentVariable.standardname, "number_of_seconds_from_0000_UTC"
        )
        self.assertEqual(ict.independentVariable.longname, None)
        self.assertEqual(ict.independentVariable.scale, 1.0)
        self.assertEqual(ict.independentVariable.miss, -99999.0)

    def testDvar(self):
        ict = icartt.Dataset(self.fn, loadData=False)

        self.assertEqual(
            [DVAR.shortname for DVAR in ict.dependentVariables.values()],
            [
                "Stop_UTC",
                "Mid_UTC",
                "DLat",
                "DLon",
                "Elev",
                "NO_ppbv",
                "NO_1sig",
                "NO2_ppbv",
                "NO2_1sig",
            ],
        )

        self.assertEqual(
            [DVAR.units for DVAR in ict.dependentVariables.values()],
            [
                "seconds",
                "seconds",
                "deg_N",
                "deg_E",
                "meters",
                "ppbv",
                "ppbv",
                "ppbv",
                "ppbv",
            ],
        )

        self.assertEqual(
            [DVAR.standardname for DVAR in ict.dependentVariables.values()],
            [None, None, None, None, None, None, None, None, None],
        )

        self.assertEqual(
            [DVAR.longname for DVAR in ict.dependentVariables.values()],
            [None, None, None, None, None, None, None, None, None],
        )

        self.assertEqual(
            [DVAR.scale for DVAR in ict.dependentVariables.values()],
            ["1", "1", "1", "1", "1", "1", "1", "1", "1"],
        )

        self.assertEqual(
            [DVAR.miss for DVAR in ict.dependentVariables.values()],
            [
                "-9999",
                "-9999",
                "-9999",
                "-9999",
                "-9999",
                "-9999",
                "-9999",
                "-9999",
                "-9999",
            ],
        )

    def testNCOM(self):
        ict = icartt.Dataset(self.fn, loadData=False)

        self.assertEqual(
            ict.normalComments.keywords["PI_CONTACT_INFO"].data,
            [
                "325 Broadway, Boulder, CO 80305; 303-497-3226; email:eric.j.williams@noaa.gov"
            ],
        )
        self.assertEqual(
            ict.normalComments.keywords["PLATFORM"].data,
            ["NOAA research vessel Ronald H. Brown"],
        )
        self.assertEqual(
            ict.normalComments.keywords["LOCATION"].data,
            ["Latitude, longitude and elevation data are included in the data records"],
        )
        self.assertEqual(ict.normalComments.keywords["ASSOCIATED_DATA"].data, ["N/A"])
        self.assertEqual(
            ict.normalComments.keywords["INSTRUMENT_INFO"].data,
            ["NO: chemiluminescence; NO2: narrow-band photolysis/chemiluminescence"],
        )
        self.assertEqual(
            ict.normalComments.keywords["DATA_INFO"].data,
            [
                "All data with the exception of the location data are in ppbv. All oneminute averages contain at least 35 seconds of data, otherwise missing."
            ],
        )
        self.assertEqual(
            ict.normalComments.keywords["UNCERTAINTY"].data,
            ["included in the data records as variables with a _1sig suffix"],
        )
        self.assertEqual(ict.normalComments.keywords["ULOD_FLAG"].data, ["-7777"])
        self.assertEqual(ict.normalComments.keywords["ULOD_VALUE"].data, ["N/A"])
        self.assertEqual(ict.normalComments.keywords["LLOD_FLAG"].data, ["-8888"])
        self.assertEqual(
            ict.normalComments.keywords["LLOD_VALUE"].data,
            ["N/A, N/A, N/A, N/A, N/A, 0.005, N/A, 0.025, N/A"],
        )
        self.assertEqual(ict.normalComments.keywords["DM_CONTACT_INFO"].data, ["N/A"])
        self.assertEqual(
            ict.normalComments.keywords["PROJECT_INFO"].data,
            [
                "ICARTT study; 1 July-15 August 2004; Gulf of Maine and North Atlantic Ocean"
            ],
        )
        self.assertEqual(
            ict.normalComments.keywords["STIPULATIONS_ON_USE"].data,
            ["Use of these data requires PRIOR OK from the PI"],
        )
        self.assertEqual(ict.normalComments.keywords["OTHER_COMMENTS"].data, ["N/A"])
        # TODO test revision information

    def testReadData(self):
        ict = icartt.Dataset(self.fn, loadData=True)
        self.assertEqual(type(ict), icartt.Dataset)

    def testWriteHeader(self):
        ict = icartt.Dataset(self.fn, loadData=False)

        strIn = open(self.fn)
        strOut = io.StringIO()

        ict.writeHeader(f=strOut)

        self.assertTrue(compareFiles(self.fn, strIn, strOut, nlines=self.nHeader))

    def testWriteData(self):
        ict = icartt.Dataset(self.fn, loadData=True)

        strIn = open(self.fn)
        strOut = io.StringIO()

        ict.write(f=strOut)

        self.assertTrue(compareFiles(self.fn, strIn, strOut, skiplines=self.nHeader))

    def testWrite(self):
        ict = icartt.Dataset(self.fn, loadData=True)

        strIn = open(self.fn)
        strOut = io.StringIO()

        ict.write(f=strOut)

        self.assertTrue(compareFiles(self.fn, strIn, strOut))


class Create1001TestCase(unittest.TestCase):
    def testCreateDs(self):
        now = datetime.datetime.today()

        ict = icartt.Dataset(format=icartt.Formats.FFI1001)

        ict.PIName = "Knote, Christoph"
        ict.PIAffiliation = "Faculty of Medicine, University Augsburg, Germany"
        ict.dataSourceDescription = "Example data"
        ict.missionName = "MBEES"
        ict.dateOfCollection = now.timetuple()[:3]
        ict.dateOfRevision = now.timetuple()[:3]

        ict.dataIntervalCode = [0]

        ict.independentVariable = icartt.Variable(
            "Time_Start",
            "seconds_from_0_hours_on_valid_date",
            "Time_Start",
            "Time_Start",
            vartype=icartt.VariableType.IndependentVariable,
            scale=1.0,
            miss=-9999999,
        )

        ict.dependentVariables["Time_Stop"] = icartt.Variable(
            "Time_Stop",
            "seconds_from_0_hours_on_valid_date",
            "Time_Stop",
            "Time_Stop",
            scale=1.0,
            miss=-9999999,
        )

        ict.dependentVariables["Payload"] = icartt.Variable(
            "Payload", "some_units", "Payload", "Payload", scale=1.0, miss=-9999999
        )

        ict.specialComments.append("Some comments on this dataset:")
        ict.specialComments.append("They are just examples!")
        ict.specialComments.append("Adapt as needed.")

        # we can just use len of the list to check number of comments
        self.assertEqual(len(ict.specialComments), 3)

        # let's define some normal comments... 21 lines
        ncom = {
            "PI_CONTACT_INFO": "PI1 pi-email@mail.com\nPI2 more-email@what.com",
            "PLATFORM": "a platform",
            "LOCATION": "somewhere",
            "ASSOCIATED_DATA": "met sensor data",
            "INSTRUMENT_INFO": "super cool instrument",
            "DATA_INFO": f"icartt Python package version: {icartt.__version__}",
            "UNCERTAINTY": "not much",
            "ULOD_FLAG": "-7777",
            "ULOD_VALUE": "N/A",
            "LLOD_FLAG": "-8888",
            "LLOD_VALUE": "N/A",
            "DM_CONTACT_INFO": "datamanager@mail.edu",
            "PROJECT_INFO": "the campaign",
            "STIPULATIONS_ON_USE": "no",
            "OTHER_COMMENTS": "a lot more info\non multiple lines",
            "REVISION": (
                "R1\n"
                "R1: revised time synchronization.\n"
                "R0: initial, preliminary version."
            ),
        }
        for k, v in ncom.items():
            ict.normalComments.keywords[k].append(v)

        # we can check if nlines method of normalComments class works
        self.assertEqual(ict.normalComments.nlines, 21)

        ict.normalComments.freeform.append("free comment line 1")
        ict.normalComments.freeform.append("free comment line 2")
        self.assertEqual(ict.normalComments.nlines, 23)

        ict.endDefineMode()

        # we have not added data yet, so data must be None
        self.assertIsNone(ict.data[:])
        # and times must be NaT
        self.assertTrue(np.isnat(ict.times))

        # single line data adding
        # it is the users job to ensure data consistency!
        # Time_Start, Time_Stop, Payload
        oneLineData = np.array([(12.3, 12.5, 23789423.2e5)])
        ict.data.add(oneLineData)

        # this also works for bulk data dumps
        multiLineData = np.array(
            [
                (12.6, 13.0, 2348925e5),
                (13.4, 14.0, 23425634e5),
                (14.1, 14.7, 23422344e5),
            ]
        )
        ict.data.add(multiLineData)

        # you can also be explicit, and define names and datatypes
        structuredData = np.array(
            [(14.5, 14.6, 24824525e5), (14.6, 14.7, 41225634e5)],
            dtype=[
                ("Time_Start", ict.data.default_dtype),
                ("Time_Stop", ict.data.default_dtype),
                ("Payload", ict.data.default_dtype),
            ],
        )
        ict.data.add(structuredData)

        # elements of the time array must be equal to our input
        t0 = np.datetime64(datetime.datetime(*now.timetuple()[:3]), "ns")
        for have, want in zip(ict.times, (12.3, 12.6, 13.4, 14.1, 14.5, 14.6)):
            self.assertEqual(int(have - t0), int(want * 10**9))

        strOut = io.StringIO()

        ict.write(f=strOut)

        return True


if __name__ == "__main__":  # pragma: no cover
    unittest.main()