"""
Test basic std::array functionality.
"""

from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class TestCase(TestBase):
    @add_test_categories(["libc++"])
    @skipIf(compiler=no_match("clang"))
    def test(self):
        self.build()

        lldbutil.run_to_source_breakpoint(
            self, "// Set break point at this line.", lldb.SBFileSpec("main.cpp")
        )

        self.runCmd("settings set target.import-std-module true")

        size_type = "size_type"
        value_type = "value_type"
        iterator = "iterator"
        riterator = "reverse_iterator"

        # Test inspecting an array of integers.
        array_type = "std::array<int, 3>"
        self.expect_expr(
            "a",
            result_type=array_type,
            result_children=[
                ValueCheck(
                    name="__elems_",
                    children=[
                        ValueCheck(value="3"),
                        ValueCheck(value="1"),
                        ValueCheck(value="2"),
                    ],
                )
            ],
        )
        self.expect_expr("a.size()", result_type=size_type, result_value="3")
        self.expect_expr("a.front()", result_type=value_type, result_value="3")
        self.expect_expr("a[1]", result_type=value_type, result_value="1")
        self.expect_expr("a.back()", result_type=value_type, result_value="2")

        # Both are just pointers to the underlying elements.
        self.expect_expr("a.begin()", result_type=iterator)
        self.expect_expr("a.rbegin()", result_type=riterator)

        self.expect_expr("*a.begin()", result_type=value_type, result_value="3")
        self.expect_expr("*a.rbegin()", result_type="int", result_value="2")

        self.expect_expr("a.at(0)", result_type=value_type, result_value="3")

        # Same again with an array that has an element type from debug info.
        array_type = "std::array<DbgInfo, 1>"

        dbg_info_elem_children = [ValueCheck(value="4")]
        dbg_info_elem = [ValueCheck(children=dbg_info_elem_children)]

        self.expect_expr(
            "b",
            result_type=array_type,
            result_children=[ValueCheck(name="__elems_", children=dbg_info_elem)],
        )
        self.expect_expr("b.size()", result_type=size_type, result_value="1")
        self.expect_expr(
            "b.front()", result_type=value_type, result_children=dbg_info_elem_children
        )
        self.expect_expr(
            "b[0]", result_type=value_type, result_children=dbg_info_elem_children
        )
        self.expect_expr(
            "b.back()", result_type=value_type, result_children=dbg_info_elem_children
        )

        # Both are just pointers to the underlying elements.
        self.expect_expr("b.begin()", result_type=iterator)
        self.expect_expr("b.rbegin()", result_type=riterator)

        self.expect_expr(
            "*b.begin()", result_type=value_type, result_children=dbg_info_elem_children
        )
        self.expect_expr(
            "*b.rbegin()", result_type="DbgInfo", result_children=dbg_info_elem_children
        )

        self.expect_expr(
            "b.at(0)", result_type=value_type, result_children=dbg_info_elem_children
        )