from graphql.core.language.location import SourceLocation
from graphql.core.validation.rules import NoUndefinedVariables
from .utils import expect_fails_rule, expect_passes_rule


def undefined_var(var_name, l1, c1, op_name, l2, c2):
    return {
        'message': NoUndefinedVariables.undefined_var_message(var_name, op_name),
        'locations': [
            SourceLocation(l1, c1),
            SourceLocation(l2, c2),
        ]
    }


def test_all_varriables_defined():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String, $b: String, $c: String) {
            field(a: $a, b: $b, c: $c)
        }
    ''')


def test_all_variables_deeply_defined():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String, $b: String, $c: String) {
            field(a: $a) {
                field(b: $b) {
                    field(c: $c)
                }
            }
        }
    ''')


def test_all_variables_deeply_in_inline_fragments_defined():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String, $b: String, $c: String) {
            ... on Type {
                field(a: $a) {
                    field(b: $b) {
                        ... on Type {
                            field(c: $c)
                        }
                    }
                }
            }
        }
    ''')


def test_all_variables_in_fragments_deeply_defined():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String, $b: String, $c: String) {
            ...FragA
        }
        fragment FragA on Type {
            field(a: $a) {
                ...FragB
            }
        }
        fragment FragB on Type {
            field(b: $b) {
                ...FragC
            }
        }
        fragment FragC on Type {
            field(c: $c)
        }
    ''')


def test_variable_within_single_fragment_defined_in_multiple_operations():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String) {
            ...FragA
        }
        query Bar($a: String) {
            ...FragA
        }
        fragment FragA on Type {
            field(a: $a)
        }
    ''')


def test_variable_within_fragments_defined_in_operations():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String) {
            ...FragA
        }
        query Bar($b: String) {
            ...FragB
        }
        fragment FragA on Type {
            field(a: $a)
        }
        fragment FragB on Type {
            field(b: $b)
        }
    ''')


def test_variable_within_recursive_fragment_defined():
    expect_passes_rule(NoUndefinedVariables, '''
        query Foo($a: String) {
            ...FragA
        }
        fragment FragA on Type {
            field(a: $a) {
                ...FragA
            }
        }
    ''')


def test_variable_not_defined():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($a: String, $b: String, $c: String) {
        field(a: $a, b: $b, c: $c, d: $d)
      }
    ''', [
        undefined_var('d', 3, 39, 'Foo', 2, 7)
    ])


def variable_not_defined_by_unnamed_query():
    expect_fails_rule(NoUndefinedVariables, '''
      {
        field(a: $a)
      }
    ''', [
        undefined_var('a', 3, 18, '', 2, 7)
    ])


def test_multiple_variables_not_defined():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($b: String) {
        field(a: $a, b: $b, c: $c)
      }
    ''', [
        undefined_var('a', 3, 18, 'Foo', 2, 7),
        undefined_var('c', 3, 32, 'Foo', 2, 7)
    ])


def test_variable_in_fragment_not_defined_by_unnamed_query():
    expect_fails_rule(NoUndefinedVariables, '''
      {
        ...FragA
      }
      fragment FragA on Type {
        field(a: $a)
      }
    ''', [
        undefined_var('a', 6, 18, '', 2, 7)
    ])


def test_variable_in_fragment_not_defined_by_operation():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($a: String, $b: String) {
        ...FragA
      }
      fragment FragA on Type {
        field(a: $a) {
          ...FragB
        }
      }
      fragment FragB on Type {
        field(b: $b) {
          ...FragC
        }
      }
      fragment FragC on Type {
        field(c: $c)
      }
    ''', [
        undefined_var('c', 16, 18, 'Foo', 2, 7)
    ])


def test_multiple_variables_in_fragments_not_defined():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($b: String) {
        ...FragA
      }
      fragment FragA on Type {
        field(a: $a) {
          ...FragB
        }
      }
      fragment FragB on Type {
        field(b: $b) {
          ...FragC
        }
      }
      fragment FragC on Type {
        field(c: $c)
      }
    ''', [
        undefined_var('a', 6, 18, 'Foo', 2, 7),
        undefined_var('c', 16, 18, 'Foo', 2, 7)
    ])


def test_single_variable_in_fragment_not_defined_by_multiple_operations():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($a: String) {
        ...FragAB
      }
      query Bar($a: String) {
        ...FragAB
      }
      fragment FragAB on Type {
        field(a: $a, b: $b)
      }
    ''', [
        undefined_var('b', 9, 25, 'Foo', 2, 7),
        undefined_var('b', 9, 25, 'Bar', 5, 7)
    ])


def test_variables_in_fragment_not_defined_by_multiple_operations():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($b: String) {
        ...FragAB
      }
      query Bar($a: String) {
        ...FragAB
      }
      fragment FragAB on Type {
        field(a: $a, b: $b)
      }
    ''', [
        undefined_var('a', 9, 18, 'Foo', 2, 7),
        undefined_var('b', 9, 25, 'Bar', 5, 7)
    ])


def test_variable_in_fragment_used_by_other_operation():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($b: String) {
        ...FragA
      }
      query Bar($a: String) {
        ...FragB
      }
      fragment FragA on Type {
        field(a: $a)
      }
      fragment FragB on Type {
        field(b: $b)
      }
    ''', [
        undefined_var('a', 9, 18, 'Foo', 2, 7),
        undefined_var('b', 12, 18, 'Bar', 5, 7)
    ])


def test_multiple_undefined_variables_produce_multiple_errors():
    expect_fails_rule(NoUndefinedVariables, '''
      query Foo($b: String) {
        ...FragAB
      }
      query Bar($a: String) {
        ...FragAB
      }
      fragment FragAB on Type {
        field1(a: $a, b: $b)
        ...FragC
        field3(a: $a, b: $b)
      }
      fragment FragC on Type {
        field2(c: $c)
      }
    ''', [
        undefined_var('a', 9, 19, 'Foo', 2, 7),
        undefined_var('a', 11, 19, 'Foo', 2, 7),
        undefined_var('c', 14, 19, 'Foo', 2, 7),
        undefined_var('b', 9, 26, 'Bar', 5, 7),
        undefined_var('b', 11, 26, 'Bar', 5, 7),
        undefined_var('c', 14, 19, 'Bar', 5, 7),
    ])
