# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
#
# 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.

import json
import os
from hashlib import sha1
from os import walk
from os.path import (
    basename,
    dirname,
    expanduser,
    isdir,
    isfile,
    join,
    realpath,
    splitdrive,
)

from click.testing import CliRunner

from platformio import __version__, exception
from platformio.compat import WINDOWS, hashlib_encode_data
from platformio.project.config import ProjectConfig


def get_project_dir():
    return os.getcwd()


def is_platformio_project(project_dir=None):
    if not project_dir:
        project_dir = get_project_dir()
    return isfile(join(project_dir, "platformio.ini"))


def find_project_dir_above(path):
    if isfile(path):
        path = dirname(path)
    if is_platformio_project(path):
        return path
    if isdir(dirname(path)):
        return find_project_dir_above(dirname(path))
    return None


def get_project_optional_dir(name, default=None):
    project_dir = get_project_dir()
    config = ProjectConfig.get_instance(join(project_dir, "platformio.ini"))
    optional_dir = config.get("platformio", name)

    if not optional_dir:
        return default

    if "$PROJECT_HASH" in optional_dir:
        optional_dir = optional_dir.replace(
            "$PROJECT_HASH",
            "%s-%s"
            % (
                basename(project_dir),
                sha1(hashlib_encode_data(project_dir)).hexdigest()[:10],
            ),
        )

    if optional_dir.startswith("~"):
        optional_dir = expanduser(optional_dir)

    return realpath(optional_dir)


def get_project_core_dir():
    default = join(expanduser("~"), ".platformio")
    core_dir = get_project_optional_dir(
        "core_dir", get_project_optional_dir("home_dir", default)
    )
    win_core_dir = None
    if WINDOWS and core_dir == default:
        win_core_dir = splitdrive(core_dir)[0] + "\\.platformio"
        if isdir(win_core_dir):
            core_dir = win_core_dir

    if not isdir(core_dir):
        try:
            os.makedirs(core_dir)
        except OSError as e:
            if win_core_dir:
                os.makedirs(win_core_dir)
                core_dir = win_core_dir
            else:
                raise e

    assert isdir(core_dir)
    return core_dir


def get_project_global_lib_dir():
    return get_project_optional_dir(
        "globallib_dir", join(get_project_core_dir(), "lib")
    )


def get_project_platforms_dir():
    return get_project_optional_dir(
        "platforms_dir", join(get_project_core_dir(), "platforms")
    )


def get_project_packages_dir():
    return get_project_optional_dir(
        "packages_dir", join(get_project_core_dir(), "packages")
    )


def get_project_cache_dir():
    return get_project_optional_dir("cache_dir", join(get_project_core_dir(), ".cache"))


def get_project_workspace_dir():
    return get_project_optional_dir("workspace_dir", join(get_project_dir(), ".pio"))


def get_project_build_dir(force=False):
    path = get_project_optional_dir(
        "build_dir", join(get_project_workspace_dir(), "build")
    )
    try:
        if not isdir(path):
            os.makedirs(path)
    except Exception as e:  # pylint: disable=broad-except
        if not force:
            raise Exception(e)
    return path


def get_project_libdeps_dir():
    return get_project_optional_dir(
        "libdeps_dir", join(get_project_workspace_dir(), "libdeps")
    )


def get_project_lib_dir():
    return get_project_optional_dir("lib_dir", join(get_project_dir(), "lib"))


def get_project_include_dir():
    return get_project_optional_dir("include_dir", join(get_project_dir(), "include"))


def get_project_src_dir():
    return get_project_optional_dir("src_dir", join(get_project_dir(), "src"))


def get_project_test_dir():
    return get_project_optional_dir("test_dir", join(get_project_dir(), "test"))


def get_project_boards_dir():
    return get_project_optional_dir("boards_dir", join(get_project_dir(), "boards"))


def get_project_data_dir():
    return get_project_optional_dir("data_dir", join(get_project_dir(), "data"))


def get_project_shared_dir():
    return get_project_optional_dir("shared_dir", join(get_project_dir(), "shared"))


def compute_project_checksum(config):
    # rebuild when PIO Core version changes
    checksum = sha1(hashlib_encode_data(__version__))

    # configuration file state
    checksum.update(hashlib_encode_data(config.to_json()))

    # project file structure
    check_suffixes = (".c", ".cc", ".cpp", ".h", ".hpp", ".s", ".S")
    for d in (get_project_include_dir(), get_project_src_dir(), get_project_lib_dir()):
        if not isdir(d):
            continue
        chunks = []
        for root, _, files in walk(d):
            for f in files:
                path = join(root, f)
                if path.endswith(check_suffixes):
                    chunks.append(path)
        if not chunks:
            continue
        chunks_to_str = ",".join(sorted(chunks))
        if WINDOWS:  # case insensitive OS
            chunks_to_str = chunks_to_str.lower()
        checksum.update(hashlib_encode_data(chunks_to_str))

    return checksum.hexdigest()


def load_project_ide_data(project_dir, env_or_envs):
    from platformio.commands.run import cli as cmd_run

    assert env_or_envs
    envs = env_or_envs
    if not isinstance(envs, list):
        envs = [envs]
    args = ["--project-dir", project_dir, "--target", "idedata"]
    for env in envs:
        args.extend(["-e", env])
    result = CliRunner().invoke(cmd_run, args)
    if result.exit_code != 0 and not isinstance(
        result.exception, exception.ReturnErrorCode
    ):
        raise result.exception
    if '"includes":' not in result.output:
        raise exception.PlatformioException(result.output)

    data = {}
    for line in result.output.split("\n"):
        line = line.strip()
        if line.startswith('{"') and line.endswith("}") and "env_name" in line:
            _data = json.loads(line)
            if "env_name" in _data:
                data[_data["env_name"]] = _data
    if not isinstance(env_or_envs, list) and env_or_envs in data:
        return data[env_or_envs]
    return data or None