"""
AutoDev - Dependency Tracker
Tracks and records all external dependencies.
"""

import os
from . import config


class DependencyTracker:
    def __init__(self, workdir: str):
        self.path = os.path.join(workdir, config.DEPENDENCY_FILE)
        self.deps: set[str] = set()
        self._load()

    def _load(self):
        if os.path.exists(self.path):
            with open(self.path, "r") as f:
                for line in f:
                    line = line.strip()
                    if line and not line.startswith("#"):
                        self.deps.add(line)

    def _save(self):
        with open(self.path, "w") as f:
            f.write("# AutoDev - Project Dependencies\n")
            f.write("# Auto-generated, do not edit manually\n\n")
            for d in sorted(self.deps):
                f.write(d + "\n")

    def add(self, dep: str):
        if dep not in self.deps:
            self.deps.add(dep)
            self._save()

    def add_many(self, deps: list[str]):
        changed = False
        for d in deps:
            if d not in self.deps:
                self.deps.add(d)
                changed = True
        if changed:
            self._save()

    def get_all(self) -> list[str]:
        return sorted(self.deps)