import os

DNC_MD_CONTENT = """# dnc

This project uses dnc (dockernecontainer). When `.dnc` is present,
run ALL commands inside the container by prefixing them with `dnc -`:

  dnc - nvim
  dnc - npm install
  dnc - python manage.py migrate

## Config

User config lives in `~/.config/dnc/` (mounted at `/run/host/config/`).
Images can read `/run/host/config/dnc.toml` for colors, keybinds, etc.

## Git / SSH

SSH agent socket is forwarded automatically. SSH keys from `~/.ssh/`
and gitconfig from `~/.gitconfig` are available inside the container.
git push/pull works without additional setup.
"""

OPENCODE_INSTRUCTIONS = """## dnc

Refer to DNC.md for container usage instructions.
"""

CURSOR_RULES = """description: dnc container
globs: *
---
Refer to DNC.md for container usage instructions.
"""


def create_dnc_md(project_dir: str):
    path = os.path.join(project_dir, "DNC.md")
    if os.path.exists(path):
        print("DNC.md already exists (use --force to overwrite)")
        return
    with open(path, "w") as f:
        f.write(DNC_MD_CONTENT)
    print("Created DNC.md")


def create_opencode(project_dir: str):
    opencode_dir = os.path.join(project_dir, ".opencode")
    os.makedirs(opencode_dir, exist_ok=True)
    path = os.path.join(opencode_dir, "instructions.md")
    if os.path.exists(path):
        print(".opencode/instructions.md already exists (use --force to overwrite)")
        return
    with open(path, "w") as f:
        f.write(OPENCODE_INSTRUCTIONS)
    print("Created .opencode/instructions.md")


def create_cursor(project_dir: str):
    cursor_dir = os.path.join(project_dir, ".cursor", "rules")
    os.makedirs(cursor_dir, exist_ok=True)
    path = os.path.join(cursor_dir, "dnc.mdc")
    if os.path.exists(path):
        print(".cursor/rules/dnc.mdc already exists (use --force to overwrite)")
        return
    with open(path, "w") as f:
        f.write(CURSOR_RULES)
    print("Created .cursor/rules/dnc.mdc")