# Copyright (C) 2014 Google Inc. All rights reserved.
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"""DevTools JSDoc validator presubmit script

See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
for more details about the presubmit API built into gcl.
"""

import sys

compile_note = "Be sure to run your patch by the compile_frontend.py script prior to committing!"

def _CompileDevtoolsFrontend(input_api, output_api):
    local_paths = [f.LocalPath() for f in input_api.AffectedFiles()]

    # FIXME: The compilation does not actually run if injected script-related files
    # have changed, as they reside in core/inspector, which is not affected
    # by this presubmit.
    # Once this is fixed, injected_script_externs.js
    # should be added to the list of triggers.
    devtools_front_end = input_api.os_path.join("devtools", "front_end")
    if (any(devtools_front_end in path for path in local_paths) or
        any("protocol.json" in path for path in local_paths) or
        any("compile_frontend.py" in path for path in local_paths) or
        any("InjectedScriptSource.js" in path for path in local_paths)):
        lint_path = input_api.os_path.join(input_api.PresubmitLocalPath(),
            "scripts", "compile_frontend.py")
        out, _ = input_api.subprocess.Popen(
            [input_api.python_executable, lint_path],
            stdout=input_api.subprocess.PIPE,
            stderr=input_api.subprocess.STDOUT).communicate()
        if "ERROR" in out or "WARNING" in out:
            return [output_api.PresubmitError(out)]
        if "NOTE" in out:
            return [output_api.PresubmitPromptWarning(out + compile_note)]
    return []


def _CheckConvertSVGToPNGHashes(input_api, output_api):
    if not input_api.platform.startswith('linux'):
        return []

    original_sys_path = sys.path
    try:
        sys.path = sys.path + [input_api.os_path.join(input_api.PresubmitLocalPath(), 'scripts')]
        import devtools_file_hashes
    finally:
        sys.path = original_sys_path

    absolute_local_paths = [af.AbsoluteLocalPath() for af in input_api.AffectedFiles(include_deletes=False)]
    images_src_path = input_api.os_path.join("devtools", "front_end", "Images", "src")
    image_source_file_paths = [path for path in absolute_local_paths if images_src_path in path and path.endswith(".svg")]
    image_sources_path = input_api.os_path.join(input_api.PresubmitLocalPath(), "front_end", "Images", "src")
    hashes_file_name = "svg2png.hashes"
    hashes_file_path = input_api.os_path.join(image_sources_path, hashes_file_name)
    invalid_hash_file_paths = devtools_file_hashes.files_with_invalid_hashes(hashes_file_path, image_source_file_paths)
    if len(invalid_hash_file_paths) == 0:
        return []
    invalid_hash_file_names = [input_api.os_path.basename(file_path) for file_path in invalid_hash_file_paths]
    file_paths_str = ", ".join(invalid_hash_file_names)
    error_message = "The following SVG files should be converted to PNG using convert_svg_images_png.py script before uploading: \n  - %s" % file_paths_str
    return [output_api.PresubmitError(error_message)]


def _CheckOptimizePNGHashes(input_api, output_api):
    if not input_api.platform.startswith('linux'):
        return []

    original_sys_path = sys.path
    try:
        sys.path = sys.path + [input_api.os_path.join(input_api.PresubmitLocalPath(), 'scripts')]
        import devtools_file_hashes
    finally:
        sys.path = original_sys_path

    absolute_local_paths = [af.AbsoluteLocalPath() for af in input_api.AffectedFiles(include_deletes=False)]
    images_src_path = input_api.os_path.join("devtools", "front_end", "Images", "src")
    image_source_file_paths = [path for path in absolute_local_paths if images_src_path in path and path.endswith(".svg")]
    image_sources_path = input_api.os_path.join(input_api.PresubmitLocalPath(), "front_end", "Images", "src")
    hashes_file_name = "optimize_png.hashes"
    hashes_file_path = input_api.os_path.join(image_sources_path, hashes_file_name)
    invalid_hash_file_paths = devtools_file_hashes.files_with_invalid_hashes(hashes_file_path, image_source_file_paths)
    if len(invalid_hash_file_paths) == 0:
        return []
    invalid_hash_file_names = [input_api.os_path.basename(file_path) for file_path in invalid_hash_file_paths]
    file_paths_str = ", ".join(invalid_hash_file_names)
    error_message = "The following PNG files should be optimized using optimize_png_images.py script before uploading: \n  - %s" % file_paths_str
    return [output_api.PresubmitError(error_message)]


def _CheckCSSViolations(input_api, output_api):
    results = []
    for f in input_api.AffectedFiles(include_deletes=False):
        if not f.LocalPath().endswith(".css"):
            continue
        for line_number, line in f.ChangedContents():
            if "/deep/" in line:
                results.append(output_api.PresubmitError(("%s:%d uses /deep/ selector") % (f.LocalPath(), line_number)))
            if "::shadow" in line:
                results.append(output_api.PresubmitError(("%s:%d uses ::shadow selector") % (f.LocalPath(), line_number)))
    return results


def CheckChangeOnUpload(input_api, output_api):
    results = []
    results.extend(_CompileDevtoolsFrontend(input_api, output_api))
    results.extend(_CheckConvertSVGToPNGHashes(input_api, output_api))
    results.extend(_CheckOptimizePNGHashes(input_api, output_api))
    results.extend(_CheckCSSViolations(input_api, output_api))
    return results


def CheckChangeOnCommit(input_api, output_api):
    return []