"""
mbed SDK
Copyright (c) 2011-2013 ARM Limited

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 re
import tempfile

from types import ListType
from shutil import rmtree
from os.path import join, exists, basename

from workspace_tools.utils import mkdir, run_cmd, run_cmd_ext
from workspace_tools.paths import MBED_TARGETS_PATH, MBED_LIBRARIES, MBED_API, MBED_HAL, MBED_COMMON
from workspace_tools.targets import TARGET_NAMES, TARGET_MAP
from workspace_tools.libraries import Library
from workspace_tools.toolchains import TOOLCHAIN_CLASSES


def build_project(src_path, build_path, target, toolchain_name,
        libraries_paths=None, options=None, linker_script=None,
        clean=False, notify=None, verbose=False, name=None, macros=None, inc_dirs=None, jobs=1, silent=False):
    """ This function builds project. Project can be for example one test / UT
    """
    # Toolchain instance
    toolchain = TOOLCHAIN_CLASSES[toolchain_name](target, options, notify, macros, silent)
    toolchain.VERBOSE = verbose
    toolchain.jobs = jobs
    toolchain.build_all = clean
    src_paths = [src_path] if type(src_path) != ListType else src_path

    # We need to remove all paths which are repeated to avoid
    # multiple compilations and linking with the same objects
    src_paths = [src_paths[0]] + list(set(src_paths[1:]))

    PROJECT_BASENAME = basename(src_paths[0])

    if name is None:
        # We will use default project name based on project folder name
        name = PROJECT_BASENAME
        toolchain.info("Building project %s (%s, %s)" % (PROJECT_BASENAME.upper(), target.name, toolchain_name))
    else:
        # User used custom global project name to have the same name for the
        toolchain.info("Building project %s to %s (%s, %s)" % (PROJECT_BASENAME.upper(), name, target.name, toolchain_name))

    # Scan src_path and libraries_paths for resources
    resources = toolchain.scan_resources(src_paths[0])
    for path in src_paths[1:]:
        resources.add(toolchain.scan_resources(path))
    if libraries_paths is not None:
        src_paths.extend(libraries_paths)
        for path in libraries_paths:
            resources.add(toolchain.scan_resources(path))

    if linker_script is not None:
        resources.linker_script = linker_script

    # Build Directory
    if clean:
        if exists(build_path):
            rmtree(build_path)
    mkdir(build_path)

    # We need to add if necessary additional include directories
    if inc_dirs:
        if type(inc_dirs) == ListType:
            resources.inc_dirs.extend(inc_dirs)
        else:
            resources.inc_dirs.append(inc_dirs)

    # Compile Sources
    for path in src_paths:
        src = toolchain.scan_resources(path)
        objects = toolchain.compile_sources(src, build_path, resources.inc_dirs)
        resources.objects.extend(objects)

    # Link Program
    return toolchain.link_program(resources, build_path, name)


def build_library(src_paths, build_path, target, toolchain_name,
         dependencies_paths=None, options=None, name=None, clean=False,
         notify=None, verbose=False, macros=None, inc_dirs=None, inc_dirs_ext=None, jobs=1, silent=False):
    """ src_path: the path of the source directory
    build_path: the path of the build directory
    target: ['LPC1768', 'LPC11U24', 'LPC2368']
    toolchain: ['ARM', 'uARM', 'GCC_ARM', 'GCC_CS', 'GCC_CR']
    library_paths: List of paths to additional libraries
    clean: Rebuild everything if True
    notify: Notify function for logs
    verbose: Write the actual tools command lines if True
    inc_dirs: additional include directories which should be included in build
    inc_dirs_ext: additional include directories which should be copied to library directory
    """
    if type(src_paths) != ListType:
        src_paths = [src_paths]

    for src_path in src_paths:
        if not exists(src_path):
            raise Exception("The library source folder does not exist: %s", src_path)

    # Toolchain instance
    toolchain = TOOLCHAIN_CLASSES[toolchain_name](target, options, macros=macros, notify=notify, silent=silent)
    toolchain.VERBOSE = verbose
    toolchain.jobs = jobs
    toolchain.build_all = clean

    # The first path will give the name to the library
    name = basename(src_paths[0])
    toolchain.info("Building library %s (%s, %s)" % (name.upper(), target.name, toolchain_name))

    # Scan Resources
    resources = []
    for src_path in src_paths:
        resources.append(toolchain.scan_resources(src_path))

    # Add extra include directories / files which are required by library
    # This files usually are not in the same directory as source files so
    # previous scan will not include them
    if inc_dirs_ext is not None:
        for inc_ext in inc_dirs_ext:
            resources.append(toolchain.scan_resources(inc_ext))

    # Dependencies Include Paths
    dependencies_include_dir = []
    if dependencies_paths is not None:
        for path in dependencies_paths:
            lib_resources = toolchain.scan_resources(path)
            dependencies_include_dir.extend(lib_resources.inc_dirs)

    if inc_dirs:
        dependencies_include_dir.extend(inc_dirs)

    # Create the desired build directory structure
    bin_path = join(build_path, toolchain.obj_path)
    mkdir(bin_path)
    tmp_path = join(build_path, '.temp', toolchain.obj_path)
    mkdir(tmp_path)

    # Copy Headers
    for resource in resources:
        toolchain.copy_files(resource.headers, build_path, rel_path=resource.base_path)
    dependencies_include_dir.extend(toolchain.scan_resources(build_path).inc_dirs)

    # Compile Sources
    objects = []
    for resource in resources:
        objects.extend(toolchain.compile_sources(resource, tmp_path, dependencies_include_dir))

    toolchain.build_library(objects, bin_path, name)


def build_lib(lib_id, target, toolchain, options=None, verbose=False, clean=False, macros=None, notify=None, jobs=1, silent=False):
    """ Wrapper for build_library function.
        Function builds library in proper directory using all dependencies and macros defined by user.
    """
    lib = Library(lib_id)
    if lib.is_supported(target, toolchain):
        # We need to combine macros from parameter list with macros from library definition
        MACROS = lib.macros if lib.macros else []
        if macros:
            MACROS.extend(macros)

        build_library(lib.source_dir, lib.build_dir, target, toolchain, lib.dependencies, options,
                      verbose=verbose,
                      silent=silent,
                      clean=clean,
                      macros=MACROS,
                      notify=notify,
                      inc_dirs=lib.inc_dirs,
                      inc_dirs_ext=lib.inc_dirs_ext,
                      jobs=jobs)
    else:
        print 'Library "%s" is not yet supported on target %s with toolchain %s' % (lib_id, target.name, toolchain)


# We do have unique legacy conventions about how we build and package the mbed library
def build_mbed_libs(target, toolchain_name, options=None, verbose=False, clean=False, macros=None, notify=None, jobs=1, silent=False):
    """ Function returns True is library was built and false if building was skipped """
    # Check toolchain support
    if toolchain_name not in target.supported_toolchains:
        supported_toolchains_text = ", ".join(target.supported_toolchains)
        print '%s target is not yet supported by toolchain %s' % (target.name, toolchain_name)
        print '%s target supports %s toolchain%s' % (target.name, supported_toolchains_text, 's' if len(target.supported_toolchains) > 1 else '')
        return False

    # Toolchain
    toolchain = TOOLCHAIN_CLASSES[toolchain_name](target, options, macros=macros, notify=notify, silent=silent)
    toolchain.VERBOSE = verbose
    toolchain.jobs = jobs
    toolchain.build_all = clean

    # Source and Build Paths
    BUILD_TARGET = join(MBED_LIBRARIES, "TARGET_" + target.name)
    BUILD_TOOLCHAIN = join(BUILD_TARGET, "TOOLCHAIN_" + toolchain.name)
    mkdir(BUILD_TOOLCHAIN)

    TMP_PATH = join(MBED_LIBRARIES, '.temp', toolchain.obj_path)
    mkdir(TMP_PATH)

    # CMSIS
    toolchain.info("Building library %s (%s, %s)"% ('CMSIS', target.name, toolchain_name))
    cmsis_src = join(MBED_TARGETS_PATH, "cmsis")
    resources = toolchain.scan_resources(cmsis_src)

    toolchain.copy_files(resources.headers, BUILD_TARGET)
    toolchain.copy_files(resources.linker_script, BUILD_TOOLCHAIN)
    toolchain.copy_files(resources.bin_files, BUILD_TOOLCHAIN)

    objects = toolchain.compile_sources(resources, TMP_PATH)
    toolchain.copy_files(objects, BUILD_TOOLCHAIN)

    # mbed
    toolchain.info("Building library %s (%s, %s)" % ('MBED', target.name, toolchain_name))

    # Common Headers
    toolchain.copy_files(toolchain.scan_resources(MBED_API).headers, MBED_LIBRARIES)
    toolchain.copy_files(toolchain.scan_resources(MBED_HAL).headers, MBED_LIBRARIES)

    # Target specific sources
    HAL_SRC = join(MBED_TARGETS_PATH, "hal")
    hal_implementation = toolchain.scan_resources(HAL_SRC)
    toolchain.copy_files(hal_implementation.headers + hal_implementation.hex_files, BUILD_TARGET, HAL_SRC)
    incdirs = toolchain.scan_resources(BUILD_TARGET).inc_dirs
    objects = toolchain.compile_sources(hal_implementation, TMP_PATH, [MBED_LIBRARIES] + incdirs)

    # Common Sources
    mbed_resources = toolchain.scan_resources(MBED_COMMON)
    objects += toolchain.compile_sources(mbed_resources, TMP_PATH, [MBED_LIBRARIES] + incdirs)

    # A number of compiled files need to be copied as objects as opposed to
    # being part of the mbed library, for reasons that have to do with the way
    # the linker search for symbols in archives. These are:
    #   - retarget.o: to make sure that the C standard lib symbols get overridden
    #   - board.o: mbed_die is weak
    #   - mbed_overrides.o: this contains platform overrides of various weak SDK functions
    separate_names, separate_objects = ['retarget.o', 'board.o', 'mbed_overrides.o'], []
    for o in objects:
        for name in separate_names:
            if o.endswith(name):
                separate_objects.append(o)
    for o in separate_objects:
        objects.remove(o)
    toolchain.build_library(objects, BUILD_TOOLCHAIN, "mbed")
    for o in separate_objects:
        toolchain.copy_files(o, BUILD_TOOLCHAIN)
    return True


def get_unique_supported_toolchains():
    """ Get list of all unique toolchains supported by targets """
    unique_supported_toolchains = []
    for target in TARGET_NAMES:
        for toolchain in TARGET_MAP[target].supported_toolchains:
            if toolchain not in unique_supported_toolchains:
                unique_supported_toolchains.append(toolchain)
    return unique_supported_toolchains


def mcu_toolchain_matrix(verbose_html=False, platform_filter=None):
    """  Shows target map using prettytable """
    unique_supported_toolchains = get_unique_supported_toolchains()
    from prettytable import PrettyTable # Only use it in this function so building works without extra modules

    # All tests status table print
    columns = ["Platform"] + unique_supported_toolchains
    pt = PrettyTable(["Platform"] + unique_supported_toolchains)
    # Align table
    for col in columns:
        pt.align[col] = "c"
    pt.align["Platform"] = "l"

    perm_counter = 0
    target_counter = 0
    for target in sorted(TARGET_NAMES):
        if platform_filter is not None:
            # FIlter out platforms using regex
            if re.search(platform_filter, target) is None:
                continue
        target_counter += 1

        row = [target]  # First column is platform name
        default_toolchain = TARGET_MAP[target].default_toolchain
        for unique_toolchain in unique_supported_toolchains:
            text = "-"
            if default_toolchain == unique_toolchain:
                text = "Default"
                perm_counter += 1
            elif unique_toolchain in TARGET_MAP[target].supported_toolchains:
                text = "Supported"
                perm_counter += 1
            row.append(text)
        pt.add_row(row)

    result = pt.get_html_string() if verbose_html else pt.get_string()
    result += "\n"
    result += "*Default - default on-line compiler\n"
    result += "*Supported - supported off-line compiler\n"
    result += "\n"
    result += "Total platforms: %d\n"% (target_counter)
    result += "Total permutations: %d"% (perm_counter)
    return result


def get_target_supported_toolchains(target):
    """ Returns target supported toolchains list """
    return TARGET_MAP[target].supported_toolchains if target in TARGET_MAP else None


def static_analysis_scan(target, toolchain_name, CPPCHECK_CMD, CPPCHECK_MSG_FORMAT, options=None, verbose=False, clean=False, macros=None, notify=None, jobs=1):
    # Toolchain
    toolchain = TOOLCHAIN_CLASSES[toolchain_name](target, options, macros=macros, notify=notify)
    toolchain.VERBOSE = verbose
    toolchain.jobs = jobs
    toolchain.build_all = clean

    # Source and Build Paths
    BUILD_TARGET = join(MBED_LIBRARIES, "TARGET_" + target.name)
    BUILD_TOOLCHAIN = join(BUILD_TARGET, "TOOLCHAIN_" + toolchain.name)
    mkdir(BUILD_TOOLCHAIN)

    TMP_PATH = join(MBED_LIBRARIES, '.temp', toolchain.obj_path)
    mkdir(TMP_PATH)

    # CMSIS
    toolchain.info("Static analysis for %s (%s, %s)" % ('CMSIS', target.name, toolchain_name))
    cmsis_src = join(MBED_TARGETS_PATH, "cmsis")
    resources = toolchain.scan_resources(cmsis_src)

    # Copy files before analysis
    toolchain.copy_files(resources.headers, BUILD_TARGET)
    toolchain.copy_files(resources.linker_script, BUILD_TOOLCHAIN)

    # Gather include paths, c, cpp sources and macros to transfer to cppcheck command line
    includes = ["-I%s"% i for i in resources.inc_dirs]
    includes.append("-I%s"% str(BUILD_TARGET))
    c_sources = " ".join(resources.c_sources)
    cpp_sources = " ".join(resources.cpp_sources)
    macros = ["-D%s"% s for s in toolchain.get_symbols() + toolchain.macros]

    includes = map(str.strip, includes)
    macros = map(str.strip, macros)

    check_cmd = CPPCHECK_CMD
    check_cmd += CPPCHECK_MSG_FORMAT
    check_cmd += includes
    check_cmd += macros

    # We need to pass some params via file to avoid "command line too long in some OSs"
    tmp_file = tempfile.NamedTemporaryFile(delete=False)
    tmp_file.writelines(line + '\n' for line in c_sources.split())
    tmp_file.writelines(line + '\n' for line in cpp_sources.split())
    tmp_file.close()
    check_cmd += ["--file-list=%s"% tmp_file.name]

    _stdout, _stderr, _rc = run_cmd(check_cmd)
    if verbose:
        print _stdout
    print _stderr

    # =========================================================================

    # MBED
    toolchain.info("Static analysis for %s (%s, %s)" % ('MBED', target.name, toolchain_name))

    # Common Headers
    toolchain.copy_files(toolchain.scan_resources(MBED_API).headers, MBED_LIBRARIES)
    toolchain.copy_files(toolchain.scan_resources(MBED_HAL).headers, MBED_LIBRARIES)

    # Target specific sources
    HAL_SRC = join(MBED_TARGETS_PATH, "hal")
    hal_implementation = toolchain.scan_resources(HAL_SRC)

    # Copy files before analysis
    toolchain.copy_files(hal_implementation.headers + hal_implementation.hex_files, BUILD_TARGET, HAL_SRC)
    incdirs = toolchain.scan_resources(BUILD_TARGET)

    target_includes = ["-I%s" % i for i in incdirs.inc_dirs]
    target_includes.append("-I%s"% str(BUILD_TARGET))
    target_includes.append("-I%s"% str(HAL_SRC))
    target_c_sources = " ".join(incdirs.c_sources)
    target_cpp_sources = " ".join(incdirs.cpp_sources)
    target_macros = ["-D%s"% s for s in toolchain.get_symbols() + toolchain.macros]

    # Common Sources
    mbed_resources = toolchain.scan_resources(MBED_COMMON)

    # Gather include paths, c, cpp sources and macros to transfer to cppcheck command line
    mbed_includes = ["-I%s" % i for i in mbed_resources.inc_dirs]
    mbed_includes.append("-I%s"% str(BUILD_TARGET))
    mbed_includes.append("-I%s"% str(MBED_COMMON))
    mbed_includes.append("-I%s"% str(MBED_API))
    mbed_includes.append("-I%s"% str(MBED_HAL))
    mbed_c_sources = " ".join(mbed_resources.c_sources)
    mbed_cpp_sources = " ".join(mbed_resources.cpp_sources)

    target_includes = map(str.strip, target_includes)
    mbed_includes = map(str.strip, mbed_includes)
    target_macros = map(str.strip, target_macros)

    check_cmd = CPPCHECK_CMD
    check_cmd += CPPCHECK_MSG_FORMAT
    check_cmd += target_includes
    check_cmd += mbed_includes
    check_cmd += target_macros

    # We need to pass some parames via file to avoid "command line too long in some OSs"
    tmp_file = tempfile.NamedTemporaryFile(delete=False)
    tmp_file.writelines(line + '\n' for line in target_c_sources.split())
    tmp_file.writelines(line + '\n' for line in target_cpp_sources.split())
    tmp_file.writelines(line + '\n' for line in mbed_c_sources.split())
    tmp_file.writelines(line + '\n' for line in mbed_cpp_sources.split())
    tmp_file.close()
    check_cmd += ["--file-list=%s"% tmp_file.name]

    _stdout, _stderr, _rc = run_cmd_ext(check_cmd)
    if verbose:
        print _stdout
    print _stderr


def static_analysis_scan_lib(lib_id, target, toolchain, cppcheck_cmd, cppcheck_msg_format,
                             options=None, verbose=False, clean=False, macros=None, notify=None, jobs=1):
    lib = Library(lib_id)
    if lib.is_supported(target, toolchain):
        static_analysis_scan_library(lib.source_dir, lib.build_dir, target, toolchain, cppcheck_cmd, cppcheck_msg_format,
                      lib.dependencies, options,
                      verbose=verbose, clean=clean, macros=macros, notify=notify, jobs=jobs)
    else:
        print 'Library "%s" is not yet supported on target %s with toolchain %s'% (lib_id, target.name, toolchain)


def static_analysis_scan_library(src_paths, build_path, target, toolchain_name, cppcheck_cmd, cppcheck_msg_format,
         dependencies_paths=None, options=None, name=None, clean=False,
         notify=None, verbose=False, macros=None, jobs=1):
    """ Function scans library (or just some set of sources/headers) for staticly detectable defects """
    if type(src_paths) != ListType:
        src_paths = [src_paths]

    for src_path in src_paths:
        if not exists(src_path):
            raise Exception("The library source folder does not exist: %s", src_path)

    # Toolchain instance
    toolchain = TOOLCHAIN_CLASSES[toolchain_name](target, options, macros=macros, notify=notify)
    toolchain.VERBOSE = verbose
    toolchain.jobs = jobs

    # The first path will give the name to the library
    name = basename(src_paths[0])
    toolchain.info("Static analysis for library %s (%s, %s)" % (name.upper(), target.name, toolchain_name))

    # Scan Resources
    resources = []
    for src_path in src_paths:
        resources.append(toolchain.scan_resources(src_path))

    # Dependencies Include Paths
    dependencies_include_dir = []
    if dependencies_paths is not None:
        for path in dependencies_paths:
            lib_resources = toolchain.scan_resources(path)
            dependencies_include_dir.extend(lib_resources.inc_dirs)

    # Create the desired build directory structure
    bin_path = join(build_path, toolchain.obj_path)
    mkdir(bin_path)
    tmp_path = join(build_path, '.temp', toolchain.obj_path)
    mkdir(tmp_path)

    # Gather include paths, c, cpp sources and macros to transfer to cppcheck command line
    includes = ["-I%s" % i for i in dependencies_include_dir + src_paths]
    c_sources = " "
    cpp_sources = " "
    macros = ['-D%s' % s for s in toolchain.get_symbols() + toolchain.macros]

    # Copy Headers
    for resource in resources:
        toolchain.copy_files(resource.headers, build_path, rel_path=resource.base_path)
        includes += ["-I%s" % i for i in resource.inc_dirs]
        c_sources += " ".join(resource.c_sources) + " "
        cpp_sources += " ".join(resource.cpp_sources) + " "

    dependencies_include_dir.extend(toolchain.scan_resources(build_path).inc_dirs)

    includes = map(str.strip, includes)
    macros = map(str.strip, macros)

    check_cmd = cppcheck_cmd
    check_cmd += cppcheck_msg_format
    check_cmd += includes
    check_cmd += macros

    # We need to pass some parameters via file to avoid "command line too long in some OSs"
    # Temporary file is created to store e.g. cppcheck list of files for command line
    tmp_file = tempfile.NamedTemporaryFile(delete=False)
    tmp_file.writelines(line + '\n' for line in c_sources.split())
    tmp_file.writelines(line + '\n' for line in cpp_sources.split())
    tmp_file.close()
    check_cmd += ["--file-list=%s"% tmp_file.name]

    # This will allow us to grab result from both stdio and stderr outputs (so we can show them)
    # We assume static code analysis tool is outputting defects on STDERR
    _stdout, _stderr, _rc = run_cmd_ext(check_cmd)
    if verbose:
        print _stdout
    print _stderr


def print_build_results(result_list, build_name):
    """ Generate result string for build results """
    result = ""
    if result_list:
        result += build_name + "\n"
        result += "\n".join(["  * %s" % f for f in result_list])
        result += "\n"
    return result
