#!/usr/bin/python3
"""
cptemplate - copy a template file from a specified template directory

Dependencies
============
* fd
* fzf
"""

# Module Imports
import argparse
import shutil
import subprocess

import file_scripts.fzf as fzf
import file_scripts.editor as editor
import file_scripts.search as search
import file_scripts.error as error

from pathlib import Path
from sys import platform


# ========== Constants ==========
# ----- Paths -----
DEFAULT_TEMPLATE_DIR = Path.home() / "Templates"

# ----- Error Messages -----
TEMPLATE_DIR_DOESNT_EXIST = "Warning: template dir does not exist, exiting."

# ----- Exit Codes -----
E_TEMP_DIR_NON_EXIST = 1

# ========== Functions==========
# ========== Main Script ==========
if __name__ == "__main__":
    if platform == "win32":
        sys.exit(error.E_INTERRUPT)

    parser = argparse.ArgumentParser()
    parser.add_argument(
        "-d",
        "--template-dir",
        dest="dir",
        type=str,
        help="choose a template directory (default: ~/Templates)",
    )
    parser.add_argument(
        "-f",
        "--force",
        dest="force_overwrite",
        action="store_true",
        help="overwrite dest if it exists",
    )
    parser.add_argument("dest", type=str)

    args = parser.parse_args()

    template_dir = DEFAULT_TEMPLATE_DIR if args.dir is None else Path(args.dir)

    # Check if default template directory is non-existent
    if not template_dir.exists():
        print(TEMPLATE_DIR_DOESNT_EXIST)
        exit(E_TEMP_DIR_NON_EXIST)

    files = search.find_files(directory=template_dir)

    try:
        selected_file = fzf.select_file_with_fzf(files)
    except KeyboardInterrupt:
        exit(error.E_INTERRUPT)
    except fzf.FZFError as f:
        print(f)
        exit(error.E_INTERRUPT)

    dest_file = Path(args.dest)

    try:
        dest_file.touch(mode=0o600, exist_ok=False)
    except FileExistsError as e:
        if args.force_overwrite:
            dest_file.touch(mode=0o600, exist_ok=True)
            dest_file.write_bytes(selected_file.read_bytes())
        else:
            print(e)
            exit(error.E_FILE_EXISTS)
    else:
        dest_file.write_bytes(selected_file.read_bytes())