# Copyright (C) 2019, QuantStack
# Copyright (C) 2022 Anaconda, Inc
# Copyright (C) 2023 conda
# SPDX-License-Identifier: BSD-3-Clause
"""
Implementation of the 'conda repoquery' subcommand.

Based on 'mamba repoquery' for v1.x.
"""

import argparse
import json
import sys
from itertools import chain

from conda.base.context import context
from conda.cli import conda_argparse
from conda.core.prefix_data import PrefixData
from conda.exceptions import CondaError
from conda.models.channel import Channel
from conda.models.match_spec import MatchSpec
from conda.reporters import get_spinner
from libmambapy import Context as LibmambaContext

from .index import LibMambaIndexHelper


def configure_parser(parser: argparse.ArgumentParser):
    package_cmds = argparse.ArgumentParser(add_help=False)
    package_cmds.add_argument("specs", help="The target package(s).", nargs="+")
    package_grp = package_cmds.add_argument_group("Subcommand options")
    package_grp.add_argument(
        "-i",
        "--installed",
        action="store_true",
        default=True,
        help=argparse.SUPPRESS,
    )
    package_grp.add_argument(
        "-p",
        "--platform",
        default=context.subdir,
        help="Platform/subdir to search packages for. Defaults to current platform.",
    )
    package_grp.add_argument(
        "--no-installed", action="store_true", help="Do not search currently installed packages."
    )
    package_grp.add_argument(
        "--pretty", action="store_true", help="Prettier output with more details."
    )

    package_grp.add_argument(
        "-a",
        "--all-channels",
        action="store_true",
        help="Look at all channels (for depends / whoneeds).",
    )
    package_grp.add_argument(
        "--use-cache-only",
        action="store_true",
        help="Search in pkgs_dirs too",
    )

    view_cmds = argparse.ArgumentParser(add_help=False)
    view_grp = view_cmds.add_argument_group("Dependency options")
    view_grp.add_argument(
        "-t", "--tree", action="store_true", help="Show dependencies in a tree-like format."
    )
    view_grp.add_argument(
        "--recursive", action="store_true", help="Show dependencies recursively."
    )

    subparser = parser.add_subparsers(dest="subcmd")

    whoneeds = subparser.add_parser(
        "whoneeds",
        help="Show packages that depend on this package.",
        parents=[package_cmds, view_cmds],
    )

    depends = subparser.add_parser(
        "depends",
        help="Show dependencies of this package.",
        parents=[package_cmds, view_cmds],
    )

    search = subparser.add_parser(
        "search",
        help="Show all available package versions.",
        parents=[package_cmds],
    )

    for cmd in (whoneeds, search, depends):
        conda_argparse.add_parser_channels(cmd)
        conda_argparse.add_parser_networking(cmd)
        conda_argparse.add_parser_known(cmd)
        conda_argparse.add_parser_json(cmd)


def repoquery(args: argparse.Namespace) -> int:
    if not args.subcmd:
        print("repoquery needs a subcommand (search, depends or whoneeds), e.g.:", file=sys.stderr)
        print("    conda repoquery search python\n", file=sys.stderr)
        return 1

    cli_flags = [getattr(args, attr, False) for attr in ("tree", "recursive", "pretty")]
    if sum([context.json, *cli_flags]) > 1:
        print("Use only one of --json, --tree, --recursive and --pretty.", file=sys.stderr)
        return 1

    if hasattr(args, "channel"):
        channels = args.channel
    else:
        channels = None
    if args.all_channels or channels is None:
        if channels:
            print("WARNING: Using all channels instead of configured channels\n", file=sys.stderr)
        channels = context.channels

    use_installed = args.installed
    if args.no_installed:
        use_installed = False

    # if we're asking for depends and channels are given, disregard
    # installed packages to prevent weird mixing
    if args.subcmd in ("depends", "whoneeds") and use_installed and channels:
        use_installed = False

    if args.subcmd == "search" and not args.installed:
        only_installed = False
    elif args.all_channels or (channels and len(channels)):
        only_installed = False
    else:
        only_installed = True

    if only_installed and args.no_installed:
        print("No channels selected. Use -a to search all channels.", file=sys.stderr)
        return 1

    if use_installed:
        prefix_data = PrefixData(context.target_prefix)
        prefix_data.load()
        installed_records = prefix_data.iter_records()
    else:
        installed_records = ()

    if args.use_cache_only:
        with get_spinner("Collecting package metadata from pkgs_dirs"):
            index = LibMambaIndexHelper(
                installed_records=(),
                channels=(),
                subdirs=(args.platform, "noarch"),
                repodata_fn=context.repodata_fns[-1],
                pkgs_dirs=context.pkgs_dirs,
            )
    else:
        channels_from_specs = []
        for spec in args.specs:
            ms = MatchSpec(spec)
            channel = ms.get_exact_value("channel")
            if channel:
                channels_from_specs.append(channel)
        with get_spinner("Collecting package metadata"):
            index = LibMambaIndexHelper(
                installed_records=installed_records,
                channels=[
                    Channel(c) for c in chain(channels or (), dict.fromkeys(channels_from_specs))
                ],
                subdirs=(args.platform, "noarch"),
                repodata_fn=context.repodata_fns[-1],
            )

    if args.subcmd == "search":
        result = index.search(args.specs, return_type="raw")
        if context.json:
            print(json.dumps(result.groupby("name").to_dict(), indent=2))
        elif getattr(args, "pretty", None):
            print(result.pretty(show_all_builds=True))
        else:
            print(result.groupby("name").table())
    elif args.subcmd == "depends":
        if len(args.specs) > 1:
            raise CondaError("Only one query supported for 'depends'.")
        result = index.depends(
            args.specs[0],
            tree=getattr(args, "tree", False) or getattr(args, "recursive", False),
            return_type="raw",
        )
        if context.json:
            print(json.dumps(result.to_dict(), indent=2))
        elif getattr(args, "tree", None) or getattr(args, "pretty", None):
            # TODO: Report upstream
            raise CondaError("--tree currently not available for this subcommand.")
            print(result.tree(LibmambaContext.instance().graphics_params))
        else:
            print(result.sort("name").table())
    elif args.subcmd == "whoneeds":
        if len(args.specs) > 1:
            raise CondaError("Only one query supported for 'whoneeds'.")
        result = index.whoneeds(
            args.specs[0],
            tree=getattr(args, "tree", False) or getattr(args, "recursive", False),
            return_type="raw",
        )
        if context.json:
            print(json.dumps(result.to_dict(), indent=2))
        elif getattr(args, "tree", None) or getattr(args, "pretty", None):
            # TODO: Report upstream
            raise CondaError("--tree currently not available for this subcommand.")
            print(result.tree(LibmambaContext.instance().graphics_params))
        else:
            print(result.sort("name").table())
    else:
        raise CondaError(f"Unrecognized subcommand: {args.subcmd}")

    return 0