# Copyright (C) 2018 and later: Unicode, Inc. and others.
# License & terms of use: http://www.unicode.org/copyright.html

from . import *
from .. import *
from .. import utils
from ..request_types import *

import os
import shutil
import subprocess

def run(build_dirs, requests, common_vars, **kwargs):
    for bd in build_dirs:
        os.makedirs(bd.format(**common_vars), exist_ok=True)
    for request in requests:
        status = run_helper(request, common_vars, **kwargs)
        if status != 0:
            print("!!! ERROR executing above command line: exit code %d" % status)
            return 1
    print("All data build commands executed")
    return 0

def run_helper(request, common_vars, is_windows, tool_dir, tool_cfg=None, **kwargs):
    if isinstance(request, PrintFileRequest):
        output_path = "{DIRNAME}/{FILENAME}".format(
            DIRNAME = utils.dir_for(request.output_file).format(**common_vars),
            FILENAME = request.output_file.filename,
        )
        print("Printing to file: %s" % output_path)
        with open(output_path, "w") as f:
            f.write(request.content)
        return 0
    if isinstance(request, CopyRequest):
        input_path = "{DIRNAME}/{FILENAME}".format(
            DIRNAME = utils.dir_for(request.input_file).format(**common_vars),
            FILENAME = request.input_file.filename,
        )
        output_path = "{DIRNAME}/{FILENAME}".format(
            DIRNAME = utils.dir_for(request.output_file).format(**common_vars),
            FILENAME = request.output_file.filename,
        )
        print("Copying file to: %s" % output_path)
        shutil.copyfile(input_path, output_path)
        return 0
    if isinstance(request, VariableRequest):
        # No-op
        return 0

    assert isinstance(request.tool, IcuTool)
    if is_windows:
        cmd_template = "{TOOL_DIR}/{TOOL}/{TOOL_CFG}/{TOOL}.exe {{ARGS}}".format(
            TOOL_DIR = tool_dir,
            TOOL_CFG = tool_cfg,
            TOOL = request.tool.name,
            **common_vars
        )
    else:
        cmd_template = "{TOOL_DIR}/{TOOL} {{ARGS}}".format(
            TOOL_DIR = tool_dir,
            TOOL = request.tool.name,
            **common_vars
        )

    if isinstance(request, RepeatedExecutionRequest):
        for loop_vars in utils.repeated_execution_request_looper(request):
            command_line = utils.format_repeated_request_command(
                request,
                cmd_template,
                loop_vars,
                common_vars
            )
            if is_windows:
                # Note: this / to \ substitution may be too aggressive?
                command_line = command_line.replace("/", "\\")
            print("Running: %s" % command_line)
            res = subprocess.run(command_line, shell=True)
            if res.returncode != 0:
                return res.returncode
        return 0
    if isinstance(request, SingleExecutionRequest):
        command_line = utils.format_single_request_command(
            request,
            cmd_template,
            common_vars
        )
        if is_windows:
            # Note: this / to \ substitution may be too aggressive?
            command_line = command_line.replace("/", "\\")
        print("Running: %s" % command_line)
        res = subprocess.run(command_line, shell=True)
        return res.returncode
    assert False