# Released under the MIT License. See LICENSE for details.
#
"""Functionality for wrangling tool config files.

This lets us auto-populate values such as python-paths or versions
into tool config files automatically instead of having to update
everything everywhere manually. It also provides a centralized location
for some tool defaults across all my projects.
"""

from __future__ import annotations

from typing import TYPE_CHECKING

from efro.terminal import Clr

if TYPE_CHECKING:
    from pathlib import Path


def install_tool_config(projroot: Path, src: Path, dst: Path) -> None:
    """Install a config."""
    print(f'Creating tool config: {Clr.BLD}{dst}{Clr.RST}')

    with src.open(encoding='utf-8') as infile:
        cfg = infile.read()

    # Some substitutions, etc.
    cfg = _filter_tool_config(projroot, cfg)

    # Add an auto-generated notice.
    comment = None
    if dst.name in ['.dir-locals.el']:
        comment = ';;'
    elif dst.name in [
        '.mypy.ini',
        '.pycheckers',
        '.pylintrc',
        '.style.yapf',
        '.clang-format',
        '.editorconfig',
    ]:
        comment = '#'
    if comment is not None:
        cfg = (
            f'{comment} THIS FILE WAS AUTOGENERATED; DO NOT EDIT.\n'
            f'{comment} Source: {src}.\n\n' + cfg
        )

    with dst.open('w', encoding='utf-8') as outfile:
        outfile.write(cfg)


def _filter_tool_config(projroot: Path, cfg: str) -> str:
    # pylint: disable=too-many-locals
    import textwrap

    from efrotools import getprojectconfig, PYVER

    # Stick project-root wherever they want.
    cfg = cfg.replace('__EFRO_PROJECT_ROOT__', str(projroot))

    # Project Python version; '3.11', etc.
    name = '__EFRO_PY_VER__'
    if name in cfg:
        cfg = cfg.replace(name, PYVER)

    # Project Python version as a binary name; 'python3.11', etc.
    name = '__EFRO_PY_BIN__'
    if name in cfg:
        cfg = cfg.replace(name, f'python{PYVER}')

    # Colon-separated list of project Python paths.
    name = '__EFRO_PYTHON_PATHS__'
    if name in cfg:
        pypaths = getprojectconfig(projroot).get('python_paths')
        if pypaths is None:
            raise RuntimeError('python_paths not set in project config')
        assert not any(' ' in p for p in pypaths)
        cfg = cfg.replace(name, ':'.join(f'{projroot}/{p}' for p in pypaths))

    # Quoted relative space-separated list of project Python paths.
    name = '__EFRO_PYTHON_PATHS_Q_REL_STR__'
    if name in cfg:
        pypaths = getprojectconfig(projroot).get('python_paths')
        if pypaths is None:
            raise RuntimeError('python_paths not set in project config')
        assert not any(' ' in p for p in pypaths)
        cfg = cfg.replace(name, ' '.join(f'"{p}"' for p in pypaths))

    # Short project name.
    short_names = {
        'ballistica-internal': 'ba-i',
        'ballistica': 'ba',
        'ballistica-master-server': 'bmas',
        'ballistica-master-server-legacy': 'bmasl',
        'ballistica-server-node': 'basn',
    }
    shortname = short_names.get(projroot.name, projroot.name)
    cfg = cfg.replace('__EFRO_PROJECT_SHORTNAME__', shortname)

    mypy_standard_settings = textwrap.dedent(
        """
    # We don't want all of our plain scripts complaining
    # about __main__ being redefined.
    scripts_are_modules = True

    # Try to be as strict as we can about using types everywhere.
    no_implicit_optional = True
    warn_unused_ignores = True
    warn_no_return = True
    warn_return_any = True
    warn_redundant_casts = True
    warn_unreachable = True
    warn_unused_configs = True
    disallow_incomplete_defs = True
    disallow_untyped_defs = True
    disallow_untyped_decorators = True
    disallow_untyped_calls = True
    disallow_any_unimported = True
    disallow_subclassing_any = True
    strict_equality = True
    local_partial_types = True
    no_implicit_reexport = True

    enable_error_code = redundant-expr, truthy-bool, \
truthy-function, unused-awaitable
    """
    ).strip()

    cfg = cfg.replace('__EFRO_MYPY_STANDARD_SETTINGS__', mypy_standard_settings)

    name = '__PYTHON_BLACK_EXTRA_ARGS__'
    if name in cfg:
        from efrotools.code import black_base_args

        bargs = black_base_args()
        assert bargs[2] == 'black'
        cfg = cfg.replace(
            name, '(' + ' '.join(f'"{b}"' for b in bargs[3:]) + ')'
        )

    # Gen a pylint init hook that sets up our Python paths.
    pylint_init_tag = '__EFRO_PYLINT_INIT__'
    if pylint_init_tag in cfg:
        pypaths = getprojectconfig(projroot).get('python_paths')
        if pypaths is None:
            raise RuntimeError('python_paths not set in project config')
        cstr = 'init-hook=import sys;'
        # Stuff our paths in at the beginning in the order they appear
        # in our projectconfig.
        for i, path in enumerate(pypaths):
            cstr += f" sys.path.insert({i}, '{projroot}/{path}');"
        cfg = cfg.replace(pylint_init_tag, cstr)
    return cfg