import os.path, re, sys
from twisted.python import usage
from allmydata.scripts.common import BaseOptions, get_aliases

NODEURL_RE=re.compile("http://([^:]*)(:([1-9][0-9]*))?")

class VDriveOptions(BaseOptions, usage.Options):
    optParameters = [
        ["node-directory", "d", "~/.tahoe",
         "Look here to find out which Tahoe node should be used for all "
         "operations. The directory should either contain a full Tahoe node, "
         "or a file named node.url which points to some other Tahoe node. "
         "It should also contain a file named root_dir.cap which contains "
         "the root dirnode URI that should be used."
         ],
        ["node-url", "u", None,
         "URL of the tahoe node to use, a URL like \"http://127.0.0.1:8123\". "
         "This overrides the URL found in the --node-directory ."],
        ["dir-cap", None, None,
         "Which dirnode URI should be used as the 'tahoe' alias."]
        ]

    def postOptions(self):
        # compute a node-url from the existing options, put in self['node-url']
        if self['node-directory']:
            if sys.platform == 'win32' and self['node-directory'] == '~/.tahoe':
                from allmydata.windows import registry
                self['node-directory'] = registry.get_base_dir_path()
            else:
                self['node-directory'] = os.path.expanduser(self['node-directory'])
        if self['node-url']:
            if (not isinstance(self['node-url'], basestring)
                or not NODEURL_RE.match(self['node-url'])):
                msg = ("--node-url is required to be a string and look like "
                       "\"http://HOSTNAMEORADDR:PORT\", not: %r" %
                       (self['node-url'],))
                raise usage.UsageError(msg)
        else:
            node_url_file = os.path.join(self['node-directory'], "node.url")
            self['node-url'] = open(node_url_file, "r").read().strip()

        aliases = get_aliases(self['node-directory'])
        if self['dir-cap']:
            aliases["tahoe"] = self['dir-cap']
        self.aliases = aliases # maps alias name to dircap


class MakeDirectoryOptions(VDriveOptions):
    def parseArgs(self, where=""):
        self.where = where
    longdesc = """Create a new directory, either unlinked or as a subdirectory."""

class AddAliasOptions(VDriveOptions):
    def parseArgs(self, alias, cap):
        self.alias = alias
        self.cap = cap

class ListAliasOptions(VDriveOptions):
    pass

class ListOptions(VDriveOptions):
    optFlags = [
        ("long", "l", "Use long format: show file sizes, and timestamps"),
        ("uri", "u", "Show file/directory URIs"),
        ("readonly-uri", None, "Show readonly file/directory URIs"),
        ("classify", "F", "Append '/' to directory names, and '*' to mutable"),
        ("json", None, "Show the raw JSON output"),
        ]
    def parseArgs(self, where=""):
        self.where = where

    longdesc = """List the contents of some portion of the virtual drive."""

class GetOptions(VDriveOptions):
    def parseArgs(self, arg1, arg2=None):
        # tahoe get FOO |less            # write to stdout
        # tahoe get tahoe:FOO |less      # same
        # tahoe get FOO bar              # write to local file
        # tahoe get tahoe:FOO bar        # same

        self.from_file = arg1
        self.to_file = arg2
        if self.to_file == "-":
            self.to_file = None

    def getSynopsis(self):
        return "%s get VDRIVE_FILE LOCAL_FILE" % (os.path.basename(sys.argv[0]),)

    longdesc = """Retrieve a file from the virtual drive and write it to the
    local filesystem. If LOCAL_FILE is omitted or '-', the contents of the file
    will be written to stdout."""

class PutOptions(VDriveOptions):
    optFlags = [
        ("mutable", "m", "Create a mutable file instead of an immutable one."),
        ]

    def parseArgs(self, arg1=None, arg2=None):
        # cat FILE > tahoe put           # create unlinked file from stdin
        # cat FILE > tahoe put FOO       # create tahoe:FOO from stdin
        # cat FILE > tahoe put tahoe:FOO # same
        # tahoe put bar FOO              # copy local 'bar' to tahoe:FOO
        # tahoe put bar tahoe:FOO        # same

        if arg1 is not None and arg2 is not None:
            self.from_file = arg1
            self.to_file = arg2
        elif arg1 is not None and arg2 is None:
            self.from_file = None
            self.to_file = arg1
        else:
            self.from_file = arg1
            self.to_file = arg2
        if self.from_file == "-":
            self.from_file = None

    def getSynopsis(self):
        return "%s put LOCAL_FILE VDRIVE_FILE" % (os.path.basename(sys.argv[0]),)

    longdesc = """Put a file into the virtual drive (copying the file's
    contents from the local filesystem). LOCAL_FILE is required to be a
    local file (it can't be stdin)."""

class CpOptions(VDriveOptions):
    optFlags = [
        ("recursive", "r", "Copy source directory recursively."),
        ("verbose", "v", "Be noisy about what is happening."),
        ]
    def parseArgs(self, *args):
        if len(args) < 2:
            raise usage.UsageError("cp requires at least two arguments")
        self.sources = args[:-1]
        self.destination = args[-1]

class RmOptions(VDriveOptions):
    def parseArgs(self, where):
        self.where = where

    def getSynopsis(self):
        return "%s rm VE_FILE" % (os.path.basename(sys.argv[0]),)

class MvOptions(VDriveOptions):
    def parseArgs(self, frompath, topath):
        self.from_file = frompath
        self.to_file = topath

    def getSynopsis(self):
        return "%s mv FROM TO" % (os.path.basename(sys.argv[0]),)

class LnOptions(VDriveOptions):
    def parseArgs(self, frompath, topath):
        self.from_file = frompath
        self.to_file = topath

    def getSynopsis(self):
        return "%s ln FROM TO" % (os.path.basename(sys.argv[0]),)

class WebopenOptions(VDriveOptions):
    def parseArgs(self, vdrive_pathname=""):
        self['vdrive_pathname'] = vdrive_pathname

    longdesc = """Opens a webbrowser to the contents of some portion of the virtual drive."""

class ReplOptions(usage.Options):
    pass

subCommands = [
    ["mkdir", None, MakeDirectoryOptions, "Create a new directory"],
    ["add-alias", None, AddAliasOptions, "Add a new alias cap"],
    ["list-aliases", None, ListAliasOptions, "List all alias caps"],
    ["ls", None, ListOptions, "List a directory"],
    ["get", None, GetOptions, "Retrieve a file from the virtual drive."],
    ["put", None, PutOptions, "Upload a file into the virtual drive."],
    ["cp", None, CpOptions, "Copy one or more files."],
    ["rm", None, RmOptions, "Unlink a file or directory in the virtual drive."],
    ["mv", None, MvOptions, "Move a file within the virtual drive."],
    ["ln", None, LnOptions, "Make an additional link to an existing file."],
    ["webopen", None, WebopenOptions, "Open a webbrowser to the root_dir"],
    ["repl", None, ReplOptions, "Open a python interpreter"],
    ]

def mkdir(config, stdout, stderr):
    from allmydata.scripts import tahoe_mkdir
    rc = tahoe_mkdir.mkdir(config['node-url'],
                           config.aliases,
                           config.where,
                           stdout, stderr)
    return rc

def add_alias(config, stdout, stderr):
    from allmydata.scripts import tahoe_add_alias
    rc = tahoe_add_alias.add_alias(config['node-directory'],
                                   config.alias,
                                   config.cap,
                                   stdout, stderr)
    return rc

def list_aliases(config, stdout, stderr):
    from allmydata.scripts import tahoe_add_alias
    rc = tahoe_add_alias.list_aliases(config['node-directory'],
                                      stdout, stderr)
    return rc

def list(config, stdout, stderr):
    from allmydata.scripts import tahoe_ls
    rc = tahoe_ls.list(config['node-url'],
                       config.aliases,
                       config.where,
                       config,
                       stdout, stderr)
    return rc

def get(config, stdout, stderr):
    from allmydata.scripts import tahoe_get
    rc = tahoe_get.get(config['node-url'],
                       config.aliases,
                       config.from_file,
                       config.to_file,
                       stdout, stderr)
    if rc == 0:
        if config.to_file is None:
            # be quiet, since the file being written to stdout should be
            # proof enough that it worked, unless the user is unlucky
            # enough to have picked an empty file
            pass
        else:
            print >>stderr, "%s retrieved and written to %s" % \
                  (config.from_file, config.to_file)
    return rc

def put(config, stdout, stderr, stdin=sys.stdin):
    from allmydata.scripts import tahoe_put
    if config['quiet']:
        verbosity = 0
    else:
        verbosity = 2
    rc = tahoe_put.put(config['node-url'],
                       config.aliases,
                       config.from_file,
                       config.to_file,
                       config['mutable'],
                       verbosity,
                       stdin, stdout, stderr)
    return rc

def cp(config, stdout, stderr):
    from allmydata.scripts import tahoe_cp
    if config['quiet']:
        verbosity = 0
    else:
        verbosity = 2
    rc = tahoe_cp.copy(config['node-url'],
                       config,
                       config.aliases,
                       config.sources,
                       config.destination,
                       verbosity,
                       stdout, stderr)
    return rc

def rm(config, stdout, stderr):
    from allmydata.scripts import tahoe_rm
    if config['quiet']:
        verbosity = 0
    else:
        verbosity = 2
    rc = tahoe_rm.rm(config['node-url'],
                     config.aliases,
                     config.where,
                     verbosity,
                     stdout, stderr)
    return rc

def mv(config, stdout, stderr):
    from allmydata.scripts import tahoe_mv
    rc = tahoe_mv.mv(config['node-url'],
                     config.aliases,
                     config.from_file,
                     config.to_file,
                     stdout, stderr,
                     mode="move")
    return rc

def ln(config, stdout, stderr):
    from allmydata.scripts import tahoe_mv
    rc = tahoe_mv.mv(config['node-url'],
                     config.aliases,
                     config.from_file,
                     config.to_file,
                     stdout, stderr,
                     mode="link")
    return rc

def webopen(config, stdout, stderr):
    import urllib, webbrowser
    nodeurl = config['node-url']
    if nodeurl[-1] != "/":
        nodeurl += "/"
    url = nodeurl + "uri/%s/" % urllib.quote(config['dir-cap'])
    if config['vdrive_pathname']:
        url += urllib.quote(config['vdrive_pathname'])
    webbrowser.open(url)
    return 0

def repl(config, stdout, stderr):
    import code
    return code.interact()

dispatch = {
    "mkdir": mkdir,
    "add-alias": add_alias,
    "list-aliases": list_aliases,
    "ls": list,
    "get": get,
    "put": put,
    "cp": cp,
    "rm": rm,
    "mv": mv,
    "ln": ln,
    "webopen": webopen,
    "repl": repl,
    }