# 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 base64
import os
import re
from imp import load_source
from multiprocessing import cpu_count
from os.path import basename, dirname, isdir, isfile, join
from urllib import quote

import click
import semantic_version

from platformio import __version__, app, exception, util
from platformio.managers.core import get_core_package_dir
from platformio.managers.package import BasePkgManager, PackageManager


class PlatformManager(BasePkgManager):

    FILE_CACHE_VALID = None  # disable platform caching

    def __init__(self, package_dir=None, repositories=None):
        if not repositories:
            repositories = [
                "https://dl.bintray.com/platformio/dl-platforms/manifest.json",
                "{0}://dl.platformio.org/platforms/manifest.json".format(
                    "https" if app.get_setting("enable_ssl") else "http")
            ]
        BasePkgManager.__init__(self, package_dir
                                or join(util.get_home_dir(), "platforms"),
                                repositories)

    @property
    def manifest_names(self):
        return ["platform.json"]

    def get_manifest_path(self, pkg_dir):
        if not isdir(pkg_dir):
            return None
        for name in self.manifest_names:
            manifest_path = join(pkg_dir, name)
            if isfile(manifest_path):
                return manifest_path
        return None

    def install(self,
                name,
                requirements=None,
                with_packages=None,
                without_packages=None,
                skip_default_package=False,
                after_update=False,
                silent=False,
                force=False,
                **_):  # pylint: disable=too-many-arguments, arguments-differ
        platform_dir = BasePkgManager.install(
            self, name, requirements, silent=silent, force=force)
        p = PlatformFactory.newPlatform(platform_dir)

        # don't cleanup packages or install them after update
        # we check packages for updates in def update()
        if after_update:
            return True

        p.install_packages(
            with_packages,
            without_packages,
            skip_default_package,
            silent=silent,
            force=force)
        return self.cleanup_packages(p.packages.keys())

    def uninstall(self, package, requirements=None, after_update=False):
        if isdir(package):
            pkg_dir = package
        else:
            name, requirements, url = self.parse_pkg_uri(package, requirements)
            pkg_dir = self.get_package_dir(name, requirements, url)

        if not pkg_dir:
            raise exception.UnknownPlatform(package)

        p = PlatformFactory.newPlatform(pkg_dir)
        BasePkgManager.uninstall(self, pkg_dir, requirements)

        # don't cleanup packages or install them after update
        # we check packages for updates in def update()
        if after_update:
            return True

        return self.cleanup_packages(p.packages.keys())

    def update(  # pylint: disable=arguments-differ
            self,
            package,
            requirements=None,
            only_check=False,
            only_packages=False):
        if isdir(package):
            pkg_dir = package
        else:
            name, requirements, url = self.parse_pkg_uri(package, requirements)
            pkg_dir = self.get_package_dir(name, requirements, url)

        if not pkg_dir:
            raise exception.UnknownPlatform(package)

        p = PlatformFactory.newPlatform(pkg_dir)
        pkgs_before = p.get_installed_packages().keys()

        missed_pkgs = set()
        if not only_packages:
            BasePkgManager.update(self, pkg_dir, requirements, only_check)
            p = PlatformFactory.newPlatform(pkg_dir)
            missed_pkgs = set(pkgs_before) & set(p.packages.keys())
            missed_pkgs -= set(p.get_installed_packages().keys())

        p.update_packages(only_check)
        self.cleanup_packages(p.packages.keys())

        if missed_pkgs:
            p.install_packages(
                with_packages=list(missed_pkgs), skip_default_package=True)

        return True

    def cleanup_packages(self, names):
        self.cache_reset()
        deppkgs = {}
        for manifest in PlatformManager().get_installed():
            p = PlatformFactory.newPlatform(manifest['__pkg_dir'])
            for pkgname, pkgmanifest in p.get_installed_packages().items():
                if pkgname not in deppkgs:
                    deppkgs[pkgname] = set()
                deppkgs[pkgname].add(pkgmanifest['version'])

        pm = PackageManager(join(util.get_home_dir(), "packages"))
        for manifest in pm.get_installed():
            if manifest['name'] not in names:
                continue
            if (manifest['name'] not in deppkgs
                    or manifest['version'] not in deppkgs[manifest['name']]):
                pm.uninstall(manifest['__pkg_dir'], after_update=True)

        self.cache_reset()
        return True

    def get_installed_boards(self):
        boards = []
        for manifest in self.get_installed():
            p = PlatformFactory.newPlatform(manifest['__pkg_dir'])
            for config in p.get_boards().values():
                board = config.get_brief_data()
                if board not in boards:
                    boards.append(board)
        return boards

    @staticmethod
    @util.memoized
    def get_registered_boards():
        return util.get_api_result("/boards", cache_valid="7d")

    def get_all_boards(self):
        boards = self.get_installed_boards()
        know_boards = ["%s:%s" % (b['platform'], b['id']) for b in boards]
        try:
            for board in self.get_registered_boards():
                key = "%s:%s" % (board['platform'], board['id'])
                if key not in know_boards:
                    boards.append(board)
        except (exception.APIRequestError, exception.InternetIsOffline):
            pass
        return sorted(boards, key=lambda b: b['name'])

    def board_config(self, id_, platform=None):
        for manifest in self.get_installed_boards():
            if manifest['id'] == id_ and (not platform
                                          or manifest['platform'] == platform):
                return manifest
        for manifest in self.get_registered_boards():
            if manifest['id'] == id_ and (not platform
                                          or manifest['platform'] == platform):
                return manifest
        raise exception.UnknownBoard(id_)


class PlatformFactory(object):

    @staticmethod
    def get_clsname(name):
        name = re.sub(r"[^\da-z\_]+", "", name, flags=re.I)
        return "%s%sPlatform" % (name.upper()[0], name.lower()[1:])

    @staticmethod
    def load_module(name, path):
        module = None
        try:
            module = load_source("platformio.managers.platform.%s" % name,
                                 path)
        except ImportError:
            raise exception.UnknownPlatform(name)
        return module

    @classmethod
    def newPlatform(cls, name, requirements=None):
        pm = PlatformManager()
        platform_dir = None
        if isdir(name):
            platform_dir = name
            name = pm.load_manifest(platform_dir)['name']
        elif name.endswith("platform.json") and isfile(name):
            platform_dir = dirname(name)
            name = util.load_json(name)['name']
        else:
            name, requirements, url = pm.parse_pkg_uri(name, requirements)
            platform_dir = pm.get_package_dir(name, requirements, url)
            if platform_dir:
                name = pm.load_manifest(platform_dir)['name']

        if not platform_dir:
            raise exception.UnknownPlatform(name if not requirements else
                                            "%s@%s" % (name, requirements))

        platform_cls = None
        if isfile(join(platform_dir, "platform.py")):
            platform_cls = getattr(
                cls.load_module(name, join(platform_dir, "platform.py")),
                cls.get_clsname(name))
        else:
            platform_cls = type(
                str(cls.get_clsname(name)), (PlatformBase, ), {})

        _instance = platform_cls(join(platform_dir, "platform.json"))
        assert isinstance(_instance, PlatformBase)
        return _instance


class PlatformPackagesMixin(object):

    def install_packages(  # pylint: disable=too-many-arguments
            self,
            with_packages=None,
            without_packages=None,
            skip_default_package=False,
            silent=False,
            force=False):
        with_packages = set(self.find_pkg_names(with_packages or []))
        without_packages = set(self.find_pkg_names(without_packages or []))

        upkgs = with_packages | without_packages
        ppkgs = set(self.packages.keys())
        if not upkgs.issubset(ppkgs):
            raise exception.UnknownPackage(", ".join(upkgs - ppkgs))

        for name, opts in self.packages.items():
            version = opts.get("version", "")
            if name in without_packages:
                continue
            elif (name in with_packages or
                  not (skip_default_package or opts.get("optional", False))):
                if ":" in version:
                    self.pm.install(
                        "%s=%s" % (name, version), silent=silent, force=force)
                else:
                    self.pm.install(name, version, silent=silent, force=force)

        return True

    def find_pkg_names(self, candidates):
        result = []
        for candidate in candidates:
            found = False

            # lookup by package types
            for _name, _opts in self.packages.items():
                if _opts.get("type") == candidate:
                    result.append(_name)
                    found = True

            if (self.frameworks and candidate.startswith("framework-")
                    and candidate[10:] in self.frameworks):
                result.append(self.frameworks[candidate[10:]]['package'])
                found = True

            if not found:
                result.append(candidate)

        return result

    def update_packages(self, only_check=False):
        for name, manifest in self.get_installed_packages().items():
            requirements = self.packages[name].get("version", "")
            if ":" in requirements:
                _, requirements, __ = self.pm.parse_pkg_uri(requirements)
            self.pm.update(manifest['__pkg_dir'], requirements, only_check)

    def get_installed_packages(self):
        items = {}
        for name in self.packages:
            pkg_dir = self.get_package_dir(name)
            if pkg_dir:
                items[name] = self.pm.load_manifest(pkg_dir)
        return items

    def are_outdated_packages(self):
        for name, manifest in self.get_installed_packages().items():
            requirements = self.packages[name].get("version", "")
            if ":" in requirements:
                _, requirements, __ = self.pm.parse_pkg_uri(requirements)
            if self.pm.outdated(manifest['__pkg_dir'], requirements):
                return True
        return False

    def get_package_dir(self, name):
        version = self.packages[name].get("version", "")
        if ":" in version:
            return self.pm.get_package_dir(*self.pm.parse_pkg_uri(
                "%s=%s" % (name, version)))
        return self.pm.get_package_dir(name, version)

    def get_package_version(self, name):
        pkg_dir = self.get_package_dir(name)
        if not pkg_dir:
            return None
        return self.pm.load_manifest(pkg_dir).get("version")


class PlatformRunMixin(object):

    LINE_ERROR_RE = re.compile(r"(^|\s+)error:?\s+", re.I)

    def run(self, variables, targets, silent, verbose):
        assert isinstance(variables, dict)
        assert isinstance(targets, list)

        self.configure_default_packages(variables, targets)
        self.install_packages(silent=True)

        self.silent = silent
        self.verbose = verbose or app.get_setting("force_verbose")

        if "clean" in targets:
            targets = ["-c", "."]

        variables['platform_manifest'] = self.manifest_path

        if "build_script" not in variables:
            variables['build_script'] = self.get_build_script()
        if not isfile(variables['build_script']):
            raise exception.BuildScriptNotFound(variables['build_script'])

        result = self._run_scons(variables, targets)
        assert "returncode" in result

        return result

    def _run_scons(self, variables, targets):
        cmd = [
            util.get_pythonexe_path(),
            join(get_core_package_dir("tool-scons"), "script", "scons"), "-Q",
            "-j %d" % self.get_job_nums(), "--warn=no-no-parallel-support",
            "-f",
            join(util.get_source_dir(), "builder", "main.py")
        ]
        cmd.append("PIOVERBOSE=%d" % (1 if self.verbose else 0))
        cmd += targets

        # encode and append variables
        for key, value in variables.items():
            cmd.append("%s=%s" % (key.upper(), base64.b64encode(value)))

        util.copy_pythonpath_to_osenv()
        result = util.exec_command(
            cmd,
            stdout=util.AsyncPipe(self.on_run_out),
            stderr=util.AsyncPipe(self.on_run_err))
        return result

    def on_run_out(self, line):
        if "`buildprog' is up to date." in line:
            return
        self._echo_line(line, level=1)

    def on_run_err(self, line):
        is_error = self.LINE_ERROR_RE.search(line) is not None
        self._echo_line(line, level=3 if is_error else 2)

        a_pos = line.find("fatal error:")
        b_pos = line.rfind(": No such file or directory")
        if a_pos == -1 or b_pos == -1:
            return
        self._echo_missed_dependency(line[a_pos + 12:b_pos].strip())

    def _echo_line(self, line, level):
        if line.startswith("scons: "):
            line = line[7:]
        assert 1 <= level <= 3
        if self.silent and (level < 2 or not line):
            return
        fg = (None, "yellow", "red")[level - 1]
        if level == 1 and "is up to date" in line:
            fg = "green"
        click.secho(line, fg=fg, err=level > 1)

    @staticmethod
    def _echo_missed_dependency(filename):
        if "/" in filename or not filename.endswith((".h", ".hpp")):
            return
        banner = """
{dots}
* Looking for {filename_styled} dependency? Check our library registry!
*
* CLI  > platformio lib search "header:{filename}"
* Web  > {link}
*
{dots}
""".format(filename=filename,
           filename_styled=click.style(filename, fg="cyan"),
           link=click.style(
               "https://platformio.org/lib/search?query=header:%s" % quote(
                   filename, safe=""),
               fg="blue"),
           dots="*" * (56 + len(filename)))
        click.echo(banner, err=True)

    @staticmethod
    def get_job_nums():
        try:
            return cpu_count()
        except NotImplementedError:
            return 1


class PlatformBase(  # pylint: disable=too-many-public-methods
        PlatformPackagesMixin, PlatformRunMixin):

    PIO_VERSION = semantic_version.Version(util.pepver_to_semver(__version__))
    _BOARDS_CACHE = {}

    def __init__(self, manifest_path):
        self._BOARDS_CACHE = {}
        self.manifest_path = manifest_path
        self._manifest = util.load_json(manifest_path)

        self.pm = PackageManager(
            join(util.get_home_dir(), "packages"),
            self._manifest.get("packageRepositories"))

        self.silent = False
        self.verbose = False

        if self.engines and "platformio" in self.engines:
            if self.PIO_VERSION not in semantic_version.Spec(
                    self.engines['platformio']):
                raise exception.IncompatiblePlatform(self.name,
                                                     str(self.PIO_VERSION))

    @property
    def name(self):
        return self._manifest['name']

    @property
    def title(self):
        return self._manifest['title']

    @property
    def description(self):
        return self._manifest['description']

    @property
    def version(self):
        return self._manifest['version']

    @property
    def homepage(self):
        return self._manifest.get("homepage")

    @property
    def vendor_url(self):
        return self._manifest.get("url")

    @property
    def repository_url(self):
        return self._manifest.get("repository", {}).get("url")

    @property
    def license(self):
        return self._manifest.get("license")

    @property
    def frameworks(self):
        return self._manifest.get("frameworks")

    @property
    def engines(self):
        return self._manifest.get("engines")

    @property
    def manifest(self):
        return self._manifest

    @property
    def packages(self):
        if "packages" not in self._manifest:
            self._manifest['packages'] = {}
        return self._manifest['packages']

    def get_dir(self):
        return dirname(self.manifest_path)

    def get_build_script(self):
        main_script = join(self.get_dir(), "builder", "main.py")
        if isfile(main_script):
            return main_script
        raise NotImplementedError()

    def is_embedded(self):
        for opts in self.packages.values():
            if opts.get("type") == "uploader":
                return True
        return False

    def get_boards(self, id_=None):

        def _append_board(board_id, manifest_path):
            config = PlatformBoardConfig(manifest_path)
            if "platform" in config and config.get("platform") != self.name:
                return
            elif "platforms" in config \
                    and self.name not in config.get("platforms"):
                return
            config.manifest['platform'] = self.name
            self._BOARDS_CACHE[board_id] = config

        bdirs = [
            util.get_projectboards_dir(),
            join(util.get_home_dir(), "boards"),
            join(self.get_dir(), "boards"),
        ]

        if id_ is None:
            for boards_dir in bdirs:
                if not isdir(boards_dir):
                    continue
                for item in sorted(os.listdir(boards_dir)):
                    _id = item[:-5]
                    if not item.endswith(".json") or _id in self._BOARDS_CACHE:
                        continue
                    _append_board(_id, join(boards_dir, item))
        else:
            if id_ not in self._BOARDS_CACHE:
                for boards_dir in bdirs:
                    if not isdir(boards_dir):
                        continue
                    manifest_path = join(boards_dir, "%s.json" % id_)
                    if isfile(manifest_path):
                        _append_board(id_, manifest_path)
                        break
            if id_ not in self._BOARDS_CACHE:
                raise exception.UnknownBoard(id_)
        return self._BOARDS_CACHE[id_] if id_ else self._BOARDS_CACHE

    def board_config(self, id_):
        return self.get_boards(id_)

    def get_package_type(self, name):
        return self.packages[name].get("type")

    def configure_default_packages(self, variables, targets):
        # enable used frameworks
        frameworks = variables.get("pioframework", [])
        if not isinstance(frameworks, list):
            frameworks = frameworks.split(", ")
        for framework in frameworks:
            if not self.frameworks:
                continue
            framework = framework.lower().strip()
            if not framework or framework not in self.frameworks:
                continue
            _pkg_name = self.frameworks[framework].get("package")
            if _pkg_name:
                self.packages[_pkg_name]['optional'] = False

        # enable upload tools for upload targets
        if any(["upload" in t for t in targets] + ["program" in targets]):
            for _name, _opts in self.packages.iteritems():
                if _opts.get("type") == "uploader":
                    self.packages[_name]['optional'] = False
                elif "nobuild" in targets:
                    # skip all packages, allow only upload tools
                    self.packages[_name]['optional'] = True

    def get_lib_storages(self):
        storages = []
        for opts in (self.frameworks or {}).values():
            if "package" not in opts:
                continue
            pkg_dir = self.get_package_dir(opts['package'])
            if not pkg_dir or not isdir(join(pkg_dir, "libraries")):
                continue
            libs_dir = join(pkg_dir, "libraries")
            storages.append({"name": opts['package'], "path": libs_dir})
            libcores_dir = join(libs_dir, "__cores__")
            if not isdir(libcores_dir):
                continue
            for item in os.listdir(libcores_dir):
                libcore_dir = join(libcores_dir, item)
                if not isdir(libcore_dir):
                    continue
                storages.append({
                    "name":
                    "%s-core-%s" % (opts['package'], item),
                    "path":
                    libcore_dir
                })

        return storages


class PlatformBoardConfig(object):

    def __init__(self, manifest_path):
        self._id = basename(manifest_path)[:-5]
        assert isfile(manifest_path)
        self.manifest_path = manifest_path
        try:
            self._manifest = util.load_json(manifest_path)
        except ValueError:
            raise exception.InvalidBoardManifest(manifest_path)
        if not set(["name", "url", "vendor"]) <= set(self._manifest.keys()):
            raise exception.PlatformioException(
                "Please specify name, url and vendor fields for " +
                manifest_path)

    def get(self, path, default=None):
        try:
            value = self._manifest
            for k in path.split("."):
                value = value[k]
            return value
        except KeyError:
            if default is not None:
                return default
            else:
                raise KeyError("Invalid board option '%s'" % path)

    def __contains__(self, key):
        try:
            self.get(key)
            return True
        except KeyError:
            return False

    @property
    def id(self):
        return self._id

    @property
    def id_(self):
        return self.id

    @property
    def manifest(self):
        return self._manifest

    def get_brief_data(self):
        return {
            "id":
            self.id,
            "name":
            self._manifest['name'],
            "platform":
            self._manifest.get("platform"),
            "mcu":
            self._manifest.get("build", {}).get("mcu", "").upper(),
            "fcpu":
            int("".join([
                c for c in str(
                    self._manifest.get("build", {}).get("f_cpu", "0L"))
                if c.isdigit()
            ])),
            "ram":
            self._manifest.get("upload", {}).get("maximum_ram_size", 0),
            "rom":
            self._manifest.get("upload", {}).get("maximum_size", 0),
            "connectivity":
            self._manifest.get("connectivity"),
            "frameworks":
            self._manifest.get("frameworks"),
            "debug":
            self.get_debug_data(),
            "vendor":
            self._manifest['vendor'],
            "url":
            self._manifest['url']
        }

    def get_debug_data(self):
        if not self._manifest.get("debug", {}).get("tools"):
            return None
        tools = {}
        for name, options in self._manifest['debug']['tools'].items():
            tools[name] = {}
            for key, value in options.items():
                if key in ("default", "onboard"):
                    tools[name][key] = value
        return {"tools": tools}

    def get_debug_tool_name(self, custom=None):
        debug_tools = self._manifest.get("debug", {}).get("tools")
        tool_name = custom
        if tool_name == "custom":
            return tool_name
        if not debug_tools:
            raise exception.DebugSupportError(self._manifest['name'])
        if tool_name:
            if tool_name in debug_tools:
                return tool_name
            raise exception.DebugInvalidOptions(
                "Unknown debug tool `%s`. Please use one of `%s` or `custom`" %
                (tool_name, ", ".join(sorted(debug_tools.keys()))))

        # automatically select best tool
        data = {"default": [], "onboard": [], "external": []}
        for key, value in debug_tools.items():
            if value.get("default"):
                data['default'].append(key)
            elif value.get("onboard"):
                data['onboard'].append(key)
            data['external'].append(key)

        for key, value in data.items():
            if not value:
                continue
            return sorted(value)[0]

        assert any(item for item in data)