#!/usr/bin/env python3

import sys
import subprocess
import yaml

PASS = 'pass'

def run(args):
    return(subprocess.run(
        args,
        stdin=sys.stdin,
        stdout=sys.stdout,
        stderr=sys.stderr).returncode)

def get_stdout(args):
    return(subprocess.run(
        args,
        stdout=subprocess.PIPE).stdout)

def extract_from_dict(d, k, last=None):
    if '.' in k:
        k1, k2 = k.split('.', 1)
        try:
            d1 = d[k1]
            return extract_from_dict(d1, k2, last=k1)
        except KeyError:
            print("\"{}\" was not found in the data".format(k))
            sys.exit(3)
    else:
        if not isinstance(d, dict):
            print("element \"{}\" is not a dictionary".format(last))
            sys.exit(3)
        try:
            return d[k]
        except KeyError:
            print("\"{}\" was not found in the data".format(k))
            sys.exit(3)


def cmd_get(*args):
    if len(args) == 1:
        print(get_stdout(['pass', 'show', args[0]]).split(b'\n')[0].decode())
        return 0

    if len(args) != 2:
        print("what do you want to get?")
        return 1

    # get the pass output
    out = get_stdout(['pass', 'show', args[0]])
    try:
        data = list(yaml.safe_load_all(out))[-1]
    except yaml.scanner.ScannerError as e:
        print("invalid YAML data: {}".format(str(e)))
        return 2
    except IndexError:
        print("invalid YAML data: no YAML document found")
        return 2

    if not isinstance(data, dict):
        print("invalid YAML data, not a dict")
        return 2

    keydata = extract_from_dict(data, args[1])
    if isinstance(keydata, list) or isinstance(keydata, dict):
        print(yaml.safe_dump(keydata, default_flow_style=False).strip())
    else:
        print(keydata)

cmds = ['get']
git_push_commands = ['insert', 'edit', 'generate', 'rm', 'mv', 'cp']

def run_pass(argv):
    return run([PASS] + argv[1:])

def just_call_pass(argv):
    sys.exit(run_pass(argv))

if len(sys.argv) == 1:
    just_call_pass(sys.argv)
elif sys.argv[1] not in cmds:
    if sys.argv[1] not in git_push_commands:
        just_call_pass(sys.argv)
    else:
        e = run_pass(sys.argv)
        if e == 0:
            print("Pushing to remote repository...")
            run([PASS, 'git', 'push'])
            print("Done")
        sys.exit(e)
else:
    sys.exit(globals()['cmd_' + sys.argv[1]](*sys.argv[2:]))