# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import os
import unittest
from io import StringIO

from mozunit import main

from mozbuild.makeutil import Makefile, Rule, read_dep_makefile, write_dep_makefile


class TestMakefile(unittest.TestCase):
    def test_rule(self):
        out = StringIO()
        rule = Rule()
        rule.dump(out)
        self.assertEqual(out.getvalue(), "")

        out = StringIO()
        rule.add_targets(["foo", "bar"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar:\n")

        out = StringIO()
        rule.add_targets(["baz"])
        rule.add_dependencies(["qux", "hoge", "piyo"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar baz: qux hoge piyo\n")

        out = StringIO()
        rule = Rule(["foo", "bar"])
        rule.add_dependencies(["baz"])
        rule.add_commands(["echo $@"])
        rule.add_commands(["$(BAZ) -o $@ $<", "$(TOUCH) $@"])
        rule.dump(out)
        self.assertEqual(
            out.getvalue(),
            "foo bar: baz\n"
            + "\techo $@\n"
            + "\t$(BAZ) -o $@ $<\n"
            + "\t$(TOUCH) $@\n",
        )

        out = StringIO()
        rule = Rule(["foo"])
        rule.add_dependencies(["bar", "foo", "baz"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo: bar baz\n")

        out = StringIO()
        rule.add_targets(["bar"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz\n")

        out = StringIO()
        rule.add_targets(["bar"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz\n")

        out = StringIO()
        rule.add_dependencies(["bar"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz\n")

        out = StringIO()
        rule.add_dependencies(["qux"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz qux\n")

        out = StringIO()
        rule.add_dependencies(["qux"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz qux\n")

        out = StringIO()
        rule.add_dependencies(["hoge", "hoge"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar: baz qux hoge\n")

        out = StringIO()
        rule.add_targets(["fuga", "fuga"])
        rule.dump(out)
        self.assertEqual(out.getvalue(), "foo bar fuga: baz qux hoge\n")

    def test_makefile(self):
        out = StringIO()
        mk = Makefile()
        rule = mk.create_rule(["foo"])
        rule.add_dependencies(["bar", "baz", "qux"])
        rule.add_commands(["echo foo"])
        rule = mk.create_rule().add_targets(["bar", "baz"])
        rule.add_dependencies(["hoge"])
        rule.add_commands(["echo $@"])
        mk.dump(out, removal_guard=False)
        self.assertEqual(
            out.getvalue(),
            "foo: bar baz qux\n" + "\techo foo\n" + "bar baz: hoge\n" + "\techo $@\n",
        )

        out = StringIO()
        mk.dump(out)
        self.assertEqual(
            out.getvalue(),
            "foo: bar baz qux\n"
            + "\techo foo\n"
            + "bar baz: hoge\n"
            + "\techo $@\n"
            + "hoge qux:\n",
        )

    def test_statement(self):
        out = StringIO()
        mk = Makefile()
        mk.create_rule(["foo"]).add_dependencies(["bar"]).add_commands(["echo foo"])
        mk.add_statement("BAR = bar")
        mk.create_rule(["$(BAR)"]).add_commands(["echo $@"])
        mk.dump(out, removal_guard=False)
        self.assertEqual(
            out.getvalue(),
            "foo: bar\n" + "\techo foo\n" + "BAR = bar\n" + "$(BAR):\n" + "\techo $@\n",
        )

    @unittest.skipIf(os.name != "nt", "Test only applicable on Windows.")
    def test_path_normalization(self):
        out = StringIO()
        mk = Makefile()
        rule = mk.create_rule(["c:\\foo"])
        rule.add_dependencies(["c:\\bar", "c:\\baz\\qux"])
        rule.add_commands(["echo c:\\foo"])
        mk.dump(out)
        self.assertEqual(
            out.getvalue(),
            "c:/foo: c:/bar c:/baz/qux\n" + "\techo c:\\foo\n" + "c:/bar c:/baz/qux:\n",
        )

    def test_read_dep_makefile(self):
        input = StringIO(
            os.path.abspath("foo")
            + ": bar\n"
            + "baz qux: \\ \n"
            + "hoge \\\n"
            + "piyo \\\n"
            + "fuga\n"
            + "fuga:\n"
        )
        result = list(read_dep_makefile(input))
        self.assertEqual(len(result), 2)
        self.assertEqual(
            list(result[0].targets()), [os.path.abspath("foo").replace(os.sep, "/")]
        )
        self.assertEqual(list(result[0].dependencies()), ["bar"])
        self.assertEqual(list(result[1].targets()), ["baz", "qux"])
        self.assertEqual(list(result[1].dependencies()), ["hoge", "piyo", "fuga"])

    def test_write_dep_makefile(self):
        out = StringIO()
        write_dep_makefile(out, "target", ["b", "c", "a"])
        self.assertEqual(out.getvalue(), "target: b c a\n" + "a b c:\n")


if __name__ == "__main__":
    main()