"""
Vhex package searching user interface
"""
import sys

from core.logger import log
import core.pkg


__all__ = [
    'pkg_search_cli_parse'
]


__HELP__ = r"""
vxsdk-pkg-search
Package manager : search commands

SYNOPSIS:
    vxsdk pkg search [ OPTIONS ] [ targets[, ...] ]

DESCRIPTION:
    This part of the vxSDK will performs search queries in remote and local
    arena (see <OPTIONS> to change this default behaviour). Each "target" can
    be written specificaly like this:

        <NAME@version> (ex: vxKernel@1.2.3)

    This will allow the searching to try to match package with specific version
    information. This part is very powerfull because If the 'version' is
    detected to respect the correct semantic versioning, you can perform version
    operations in the version target:

        Caret requirements (^)
            ^1.2.3  :=  >=1.2.3, <2.0.0
            ^1.2    :=  >=1.2.0, <2.0.0
            ^1      :=  >=1.0.0, <2.0.0
            ^0.2.3  :=  >=0.2.3, <0.3.0
            ^0.2    :=  >=0.2.0, <0.3.0
            ^0.0.3  :=  >=0.0.3, <0.0.4
            ^0.0    :=  >=0.0.0, <0.1.0
            ^0      :=  >=0.0.0, <1.0.0

        Tilde requirements (~)
            ~1.2.3  := >=1.2.3, <1.3.0
            ~1.2    := >=1.2.0, <1.3.0
            ~1      := >=1.0.0, <2.0.0

        Wildcard requirements (*)
            *       := >=0.0.0
            1.*     := >=1.0.0, <2.0.0
            1.2.*   := >=1.2.0, <1.3.0

    Note that it's possible that a package can have two same version (one for
    branch name and another for a tag), by default, the tag is always selected,
    but here the display information will explicitly describe if the version is
    a tag and / or a branch.

OPTIONS:
    -a, --all           Display all package found
    -l, --local         Performs search in "local" and local
    -L, --local-only    Performs search only in "local"
    -r, --remote        Performs search only in "remote"
    -i, --info          Print extra information for each repositories
    -s, --short         Print short information for each repositories (default)
    -h, --help          Print this help and exit
""".strip()

#---
# Internals
#---

def _pkg_list_display(pkg_list, version, display_extra_info=False):
    for pkg in pkg_list:
        indent = '    '
        log.user(f"{pkg['full_name']}")

        # handle special version request
        version_available = pkg['versions']
        if version:
            version_available = []
            for ver in pkg['versions']:
                if ver.validate(version):
                    version_available.append(ver)

        if display_extra_info:
            log.user(
                f"- Description : {pkg['description']}\n"
                f"- Created at {pkg['created']}\n"
                f"- Updated at {pkg['updated']}\n"
                f"- Authors : {pkg['author']}\n"
                f"- URL : {pkg['url']}\n"
                "- Versions:"
            )

        if not version_available:
            log.user(f"{indent}No version available for '{version}'")
            return

        for ver in version_available:
            ind = '  '
            if len(ver.sources) == 1:
                ind = '(r-) ' if ver.sources[0] == 'remote' else '(-l) '
            if len(ver.sources) > 1:
                ind = '(rl) '
            content  = f"{indent}{ind}{pkg['name']}@{ver.name}".ljust(32)
            content += f"({ver.type})"
            log.user(content)
        log.user(" ")

#---
# Public
#---

def pkg_search_cli_parse(argv):
    """ Search command handling """
    if not argv:
        log.notice(__HELP__)
        sys.exit(84)
    if '-h' in argv or '--help' in argv:
        log.user(__HELP__)
        sys.exit(0)

    local = True
    remote = True
    display_extra_info = False
    for arg in argv:
        # handle search arena
        if arg in ['-l', '--local', '-r', '--remote']:
            local  = arg in ['-l', '--local']
            remote = arg in ['-r', '--remote']
            continue
        # handle display mode
        if arg in ['-i', '--info', '-s', '--short']:
            display_extra_info = arg in ['-i', '--info']
            continue

        # performs searching operation
        # @note
        # - handle search exception when all package a requested
        if arg in ['-a', '--all']:
            pkg_list = core.pkg.find(None, None, local, remote)
        else:
            pkg_list = core.pkg.find(
                arg.split('@')[0],
                None,
                local,
                remote
            )
        if not pkg_list:
            log.warn(f"{arg}: package not found, skipped")
            continue

        # display package information
        _pkg_list_display(
            pkg_list,
            None if len(arg.split('@')) != 2 else arg.split('@')[1],
            display_extra_info
        )

    return 0