# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
import json

from age.models import Vertex
import unittest
import decimal
import age
import argparse

DSN = "host=localhost port=5432 dbname=postgres user=postgres password=agens"
TEST_HOST = "localhost"
TEST_PORT = 5432
TEST_DB = "postgres"
TEST_USER = "postgres"
TEST_PASSWORD = "agens"
TEST_GRAPH_NAME = "test_graph"

class TestAgeBasic(unittest.TestCase):
    ag = None
    def setUp(self):
        print("Connecting to Test Graph.....")
        self.ag = age.connect(graph=TEST_GRAPH_NAME, host=TEST_HOST, port=TEST_PORT, dbname=TEST_DB, user=TEST_USER, password=TEST_PASSWORD)


    def tearDown(self):
        # Clear test data
        print("Deleting Test Graph.....")
        age.deleteGraph(self.ag.connection, self.ag.graphName)
        self.ag.close()

    def testExec(self):

        print("\n---------------------------------------------------")
        print("Test 1: Checking single and multi column Returns.....")
        print("---------------------------------------------------\n")

        ag = self.ag
        # Create and Return single column
        cursor = ag.execCypher("CREATE (n:Person {name: %s, title: 'Developer'}) RETURN n", params=('Andy',))
        for row in cursor:
            print("Vertex: %s , Type: %s " % (Vertex, type(row[0])))


        # Create and Return multi columns
        cursor = ag.execCypher("CREATE (n:Person {name: %s, title: %s}) RETURN id(n), n.name", cols=['id','name'], params=('Jack','Manager'))
        row = cursor.fetchone()
        print("Id: %s , Name: %s" % (row[0], row[1]))
        self.assertEqual(int, type(row[0]))
        ag.commit()
        print("\nTest 1 Successful....")


    def testQuery(self):

        print("\n--------------------------------------------------")
        print("Test 2: Testing CREATE and query relationships....." )
        print("--------------------------------------------------\n")

        ag = self.ag
        ag.execCypher("CREATE (n:Person {name: %s}) ", params=('Jack',))
        ag.execCypher("CREATE (n:Person {name: %s}) ", params=('Andy',))
        ag.execCypher("CREATE (n:Person {name: %s}) ", params=('Smith',))
        ag.execCypher("MATCH (a:Person), (b:Person) WHERE a.name = 'Andy' AND b.name = 'Jack' CREATE (a)-[r:worksWith {weight: 3}]->(b)")
        ag.execCypher("""MATCH (a:Person), (b:Person)
                    WHERE  a.name = %s AND b.name = %s
                    CREATE p=((a)-[r:worksWith]->(b)) """, params=('Jack', 'Smith',))

        ag.commit()

        cursor = ag.execCypher("MATCH p=()-[:worksWith]-() RETURN p")
        for row in cursor:
            path = row[0]
            print("START:", path[0])
            print("EDGE:", path[1])
            print("END:", path[2])

        cursor = ag.execCypher("MATCH p=(a)-[b]-(c) WHERE b.weight>2 RETURN a,label(b), b.weight, c", cols=["a","bl","bw", "c"], params=(2,))
        for row in cursor:
            start = row[0]
            edgel = row[1]
            edgew = row[2]
            end = row[3]
            print("Relationship: %s %s %s. Edge weight: %s" % (start["name"] , edgel,end["name"], edgew))
            #Assert that the weight of the edge is greater than 2
            self.assertEqual(edgew > 2, True)
        print("\nTest 2 Successful...")


    def testChangeData(self):

        print("\n-------------------------------------------------------")
        print("Test 3: Testing changes in data using SET and REMOVE.....")
        print("-------------------------------------------------------\n")

        ag = self.ag
        # Create Vertices
        # Commit automatically
        ag.execCypher("CREATE (n:Person {name: 'Joe'})")

        cursor = ag.execCypher("CREATE (n:Person {name: %s, title: 'Developer'}) RETURN n", params=('Smith',))
        row = cursor.fetchone()
        print("CREATED: ", row[0])

        # You must commit explicitly
        ag.commit()

        cursor = ag.execCypher("MATCH (n:Person {name: %s}) SET n.title=%s RETURN n", params=('Smith','Manager',))
        row = cursor.fetchone()
        vertex = row[0]
        title1 = vertex["title"]
        print("SET title: ", title1)

        ag.commit()

        cursor = ag.execCypher("MATCH (p:Person {name: 'Smith'}) RETURN p.title")
        row = cursor.fetchone()
        title2 = row[0]

        self.assertEqual(title1, title2)

        cursor = ag.execCypher("MATCH (n:Person {name: %s}) SET n.bigNum=-6.45161e+46::numeric RETURN n", params=('Smith',))
        row = cursor.fetchone()
        vertex = row[0]
        for row in cursor:
            print("SET bigNum: ", vertex['bigNum'])

        bigNum1 = vertex["bigNum"]

        self.assertEqual(decimal.Decimal("-6.45161e+46"), bigNum1)
        ag.commit()


        cursor = ag.execCypher("MATCH (p:Person {name: 'Smith'}) RETURN p.bigNum")
        row = cursor.fetchone()
        bigNum2 = row[0]

        self.assertEqual(bigNum1, bigNum2)


        cursor = ag.execCypher("MATCH (n:Person {name: %s}) REMOVE n.title RETURN n", params=('Smith',))
        for row in cursor:
            print("REMOVE Prop title: ", row[0])
            #Assert that the title property is removed
            self.assertIsNone(row[0].properties.get('title'))
        print("\nTest 3 Successful....")

        # You must commit explicitly
        ag.commit()


    def testCypher(self):

        print("\n--------------------------")
        print("Test 4: Testing Cypher.....")
        print("--------------------------\n")

        ag = self.ag

        with ag.connection.cursor() as cursor:
            try :
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Joe',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Jack',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Andy',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Smith',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Tom',))

                # You must commit explicitly
                ag.commit()
            except Exception as ex:
                print(ex)
                ag.rollback()

        with ag.connection.cursor() as cursor:
            try :# Create Edges
                ag.cypher(cursor,"MATCH (a:Person), (b:Person) WHERE a.name = 'Joe' AND b.name = 'Smith' CREATE (a)-[r:worksWith {weight: 3}]->(b)")
                ag.cypher(cursor,"MATCH (a:Person), (b:Person) WHERE  a.name = 'Andy' AND b.name = 'Tom' CREATE (a)-[r:worksWith {weight: 1}]->(b)")
                ag.cypher(cursor,"MATCH (a:Person {name: 'Jack'}), (b:Person {name: 'Andy'}) CREATE (a)-[r:worksWith {weight: 5}]->(b)")

                # You must commit explicitly
                ag.commit()
            except Exception as ex:
                print(ex)
                ag.rollback()


        # With Params
        cursor = ag.execCypher("""MATCH (a:Person), (b:Person)
                WHERE  a.name = %s AND b.name = %s
                CREATE p=((a)-[r:worksWith]->(b)) RETURN p""",
                params=('Andy', 'Smith',))

        for row in cursor:
            print("CREATED EDGE: %s" % row[0])

        cursor = ag.execCypher("""MATCH (a:Person {name: 'Joe'}), (b:Person {name: 'Jack'})
                CREATE p=((a)-[r:worksWith {weight: 5}]->(b))
                RETURN p """)

        for row in cursor:
            print("CREATED EDGE WITH PROPERTIES: %s" % row[0])
            self.assertEqual(row[0][1].properties['weight'], 5)

        print("\nTest 4 Successful...")


    def testMultipleEdges(self):

        print("\n------------------------------------")
        print("Test 5: Testing Multiple Edges.....")
        print("------------------------------------\n")

        ag = self.ag
        with ag.connection.cursor() as cursor:
            try :
                ag.cypher(cursor, "CREATE (n:Country {name: %s}) ", params=('USA',))
                ag.cypher(cursor, "CREATE (n:Country {name: %s}) ", params=('France',))
                ag.cypher(cursor, "CREATE (n:Country {name: %s}) ", params=('Korea',))
                ag.cypher(cursor, "CREATE (n:Country {name: %s}) ", params=('Russia',))

                # You must commit explicitly after all executions.
                ag.connection.commit()
            except Exception as ex:
                ag.rollback()
                raise ex

        with ag.connection.cursor() as cursor:
            try :# Create Edges
                ag.cypher(cursor,"MATCH (a:Country), (b:Country) WHERE a.name = 'USA' AND b.name = 'France' CREATE (a)-[r:distance {unit:'miles', value: 4760}]->(b)")
                ag.cypher(cursor,"MATCH (a:Country), (b:Country) WHERE  a.name = 'France' AND b.name = 'Korea' CREATE (a)-[r:distance {unit: 'km', value: 9228}]->(b)")
                ag.cypher(cursor,"MATCH (a:Country {name: 'Korea'}), (b:Country {name: 'Russia'}) CREATE (a)-[r:distance {unit:'km', value: 3078}]->(b)")

                # You must commit explicitly
                ag.connection.commit()
            except Exception as ex:
                ag.rollback()
                raise ex


        cursor = ag.execCypher("""MATCH p=(:Country {name:"USA"})-[:distance]-(:Country)-[:distance]-(:Country)
                RETURN p""")

        count = 0
        output = []
        for row in cursor:
            path = row[0]
            for e in path:
                if e.gtype == age.TP_VERTEX:
                    output.append(e.label + " " + e["name"])
                elif e.gtype == age.TP_EDGE:
                    output.append("---- (distance " + str(e["value"]) + " " + e["unit"] + ") --->")
                else:
                    output.append("Unknown element. " + str(e))

                count += 1

        formatted_output = " ".join(output)
        print("PATH WITH MULTIPLE EDGES: %s" % formatted_output)
        self.assertEqual(5,count)

        print("\nTest 5 Successful...")


    def testCollect(self):

        print("\n--------------------------")
        print("Test 6: Testing COLLECT.....")
        print("--------------------------\n")

        ag = self.ag

        with ag.connection.cursor() as cursor:
            try :
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Joe',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Jack',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Andy',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Smith',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Tom',))

                # You must commit explicitly
                ag.commit()
            except Exception as ex:
                print(ex)
                ag.rollback()

        with ag.connection.cursor() as cursor:
            try :# Create Edges
                ag.cypher(cursor,"MATCH (a:Person), (b:Person) WHERE a.name = 'Joe' AND b.name = 'Smith' CREATE (a)-[r:worksWith {weight: 3}]->(b)")
                ag.cypher(cursor,"MATCH (a:Person), (b:Person) WHERE  a.name = 'Joe' AND b.name = 'Tom' CREATE (a)-[r:worksWith {weight: 1}]->(b)")
                ag.cypher(cursor,"MATCH (a:Person {name: 'Joe'}), (b:Person {name: 'Andy'}) CREATE (a)-[r:worksWith {weight: 5}]->(b)")

                # You must commit explicitly
                ag.commit()
            except Exception as ex:
                print(ex)
                ag.rollback()

        print(" -------- TESTING COLLECT #1 --------")
        with ag.connection.cursor() as cursor:
            ag.cypher(cursor, "MATCH (a)-[:worksWith]->(c) WITH a as V, COLLECT(c) as CV RETURN V.name, CV", cols=["V","CV"])
            for row in cursor:
                nm = row[0]
                collected = row[1]
                print(nm, "worksWith", [i["name"] for i in collected])
                self.assertEqual(3,len(collected))


        print(" -------- TESTING COLLECT #2 --------")
        for row in ag.execCypher("MATCH (a)-[:worksWith]->(c) WITH a as V, COLLECT(c) as CV RETURN V.name, CV", cols=["V1","CV"]):
            nm = row[0]
            collected = row[1]
            print(nm, "worksWith", [i["name"] for i in collected])
            self.assertEqual(3,len(collected))
        print("\nTest 6 Successful...")

    def testSerialization(self):

        print("\n---------------------------------------")
        print("Test 6: Testing Vertex Serialization.....")
        print("-----------------------------------------\n")

        ag = self.ag

        with ag.connection.cursor() as cursor:
            try:
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Joe',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Jack',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Andy',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Smith',))
                ag.cypher(cursor, "CREATE (n:Person {name: %s}) ", params=('Tom',))

                # You must commit explicitly
                ag.commit()
            except Exception as ex:
                print(ex)
                ag.rollback()

        print(" -------- TESTING Output #1 --------")
        cursor = ag.execCypher("MATCH (n) RETURN n")

        for row in cursor:
            vertex = row[0]
            try:
                # json.loads will fail if the json str is not properly formatted
                as_dict = json.loads(vertex.toJson())
                print("Vertex.toJson() returns a correct json string.")
                assert True
            except:
                assert False

        print(" -------- TESTING Output #2 --------")
        cursor = ag.execCypher("MATCH (n) RETURN n")

        for row in cursor:
            vertex = row[0]
            as_str = vertex.toString()
            # Checking if the trailing comma appears in .toString() output
            self.assertFalse(as_str.endswith(", }}::VERTEX"))
        print("Vertex.toString() 'properties' field is formatted properly.")


if __name__ == '__main__':
    parser = argparse.ArgumentParser()

    parser.add_argument('-host',
                        '--host',
                        help='Optional Host Name. Default Host is "127.0.0.1" ',
                        default="127.0.0.1")
    parser.add_argument('-port',
                        '--port',
                        help='Optional Port Number. Default port no is 5432',
                        default=5432)
    parser.add_argument('-db',
                        '--database',
                        help='Required Database Name',
                        required=True)
    parser.add_argument('-u',
                        '--user',
                        help='Required Username Name',
                        required=True)
    parser.add_argument('-pass',
                        '--password',
                        help='Required Password for authentication',
                        required=True)
    parser.add_argument('-gn',
                        '--graphName',
                        help='Optional Graph Name to be created. Default graphName is "test_graph"',
                        default="test_graph")

    args = parser.parse_args()
    suite = unittest.TestSuite()
    suite.addTest(TestAgeBasic('testExec'))
    suite.addTest(TestAgeBasic('testQuery'))
    suite.addTest(TestAgeBasic('testChangeData'))
    suite.addTest(TestAgeBasic('testCypher'))
    suite.addTest(TestAgeBasic('testMultipleEdges'))
    suite.addTest(TestAgeBasic('testCollect'))
    suite.addTest(TestAgeBasic('testSerialization'))
    TestAgeBasic.args = args
    unittest.TextTestRunner().run(suite)