from .tags import Tag, TagList
from .utils.project import get_project_info


class Pipeline:
    """
    Pipeline that merges negative prompts into weighted positive prompts.
    """

    def __init__(self):
        self._displayName, self._version = get_project_info()

    def run(self, positive: str, negative: str):
        print(f"[{self._displayName} v{self._version}]")
        result = TagList(positive)

        # Combine the negatives.
        for tag in TagList(negative):
            pieces = [(text, -abs(weight)) for text, weight in tag.pieces]
            result.append(Tag(True, tag.name, pieces))

        # Log the output.
        print(f"→ {result}")
        return result

    # Shared default instance.
    DEFAULT: "Pipeline"


Pipeline.DEFAULT = Pipeline()