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# Licensed 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.
# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

import pytest

from mirage.commands.builtin.github.grep import grep
from mirage.commands.config import CommandOpts
from mirage.io.stream import materialize
from mirage.types import PathSpec
from mirage.utils.key_prefix import mount_key
from tests.fixtures.github_mock import MOCK_BLOBS


@pytest.fixture(autouse=True)
def _patch_read(monkeypatch):

    async def _read_bytes(config, owner, repo, sha):
        return MOCK_BLOBS[sha]

    monkeypatch.setattr("mirage.core.github.read.read_bytes", _read_bytes)


def _scope(path: str, resolved: bool = True) -> PathSpec:
    norm = "/" + path.lstrip("/")
    directory = norm.rsplit("/", 1)[0] + "/"
    return PathSpec(resource_path=(norm).strip("/"),
                    virtual=norm,
                    directory=directory,
                    resolved=resolved)


async def _run(accessor, index, paths, pattern, **kwargs):
    scopes = [_scope(p, resolved=("." in p.split("/")[-1])) for p in paths]
    stdout, io = await grep(accessor, scopes, [pattern],
                            CommandOpts(index=index, flags={**kwargs}))
    data = await materialize(stdout)
    return data.decode(errors="replace"), io


@pytest.mark.asyncio
async def test_single_file_grep(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/main.py"], "import")
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert len(lines) == 3
    assert "import os" in lines[0]
    assert "import sys" in lines[1]
    assert "import helper" in lines[2]


@pytest.mark.asyncio
async def test_grep_with_line_numbers(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/main.py"], "import", n=True)
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert lines[0].startswith("1:")
    assert lines[1].startswith("2:")


@pytest.mark.asyncio
async def test_grep_case_insensitive(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/main.py"], "IMPORT", i=True)
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert len(lines) >= 2


@pytest.mark.asyncio
async def test_grep_invert(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/utils.py"], "import", v=True)
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    for line in lines:
        assert "import" not in line


@pytest.mark.asyncio
async def test_grep_count(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/main.py"], "import", c=True)
    assert io.exit_code == 0
    assert text.strip() == "3"


@pytest.mark.asyncio
async def test_recursive_grep(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src"], "dataclass", r=True)
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert len(lines) >= 2
    paths_found = [line.split(":")[0] for line in lines]
    assert any("user.py" in p for p in paths_found)
    assert any("item.py" in p for p in paths_found)


@pytest.mark.asyncio
async def test_grep_no_match(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor, index, ["src/main.py"], "zzz_no_match_zzz")
    assert io.exit_code == 1


@pytest.mark.asyncio
async def test_grep_files_only(mock_github_api, github_env):
    accessor, index = github_env
    text, io = await _run(accessor,
                          index, ["src"],
                          "dataclass",
                          r=True,
                          args_l=True)
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert any("user.py" in ln for ln in lines)
    assert any("item.py" in ln for ln in lines)


@pytest.mark.asyncio
async def test_grep_stdin(github_env):
    accessor, index = github_env
    stdin_data = b"hello world\nfoo bar\nhello again\n"
    stdout, io = await grep(accessor, [], ['hello'],
                            CommandOpts(stdin=stdin_data, index=index))
    data = await materialize(stdout)
    text = data.decode(errors="replace")
    lines = text.strip().splitlines()
    assert len(lines) == 2
    assert "hello world" in lines[0]
    assert "hello again" in lines[1]


@pytest.mark.asyncio
async def test_grep_files_only_with_prefix(mock_github_api, github_env):
    accessor, index = github_env
    scopes = [
        PathSpec(resource_path=mount_key("/gh/src", "/gh"),
                 virtual="/gh/src",
                 directory="/gh/src/",
                 resolved=False)
    ]
    stdout, io = await grep(
        accessor, scopes, ['dataclass'],
        CommandOpts(index=index, flags={
            'r': True,
            'args_l': True
        }))
    data = await materialize(stdout)
    text = data.decode()
    assert io.exit_code == 0
    lines = text.strip().splitlines()
    assert any("user.py" in ln for ln in lines)
