#!/usr/bin/env python3

import sys
from pathlib import Path

home = Path.home().resolve().absolute()
dotdir = Path(__file__).parent.resolve().absolute()

simple = [
    # 'gemrc',
    'gitconfig',
    'ideavimrc',
    'lein',
    # 'irbrc',
    # 'nethackrc',
    # 'spacemacs',
    'tmux.conf',
    'vimrc'
]

targeted = {
    'doom': '.doom.d',
    'fish': '.config/fish',
}


def deploy(source_name, target_name, dry_run=False):
    source = dotdir.joinpath(source_name)
    target = home.joinpath(target_name)
    
    if not source.exists():
        raise FileNotFoundError(f"Asked to link {source_name}, which doesn't exist in {dotdir}.")

    if target.exists():
        if target.samefile(source):
            print(f"{target}->{source} already linked.")
            return
        
        backup_path = target.parent.joinpath(f"{target.name}.bak")

        print(f"{target} moves to {backup_path}")
        if not dry_run:
            target.replace(backup_path)

    if not target.parent.exists():
        print(f"making parent directories of {target}")
        if not dry_run:
            target.parent.mkdir(parents=True)

    print(f"linking {target} to {source}")
    if not dry_run:
        target.symlink_to(source)


def main(dry_run=True):
    for source in simple:
        target = f".{source}" 
        deploy(source, target, dry_run=dry_run)
        
    for source, target in targeted.items():
        deploy(source, target, dry_run=dry_run)


if __name__ == '__main__':
    try:
        main(False)
    except FileNotFoundError as e:
        print(e)
        sys.exit(1)