import re

from ...components.tree import TREE_STRINGS
from ...components.fields import Field


class StringConcat:
    def __init__(self):
        pass

    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "Prepend": Field.string(),
                "Append": Field.string(),
                "Delimiter": Field.string(default=", ")
            }
        }

    RETURN_TYPES = ("STRING",)
    RETURN_NAMES = ("TEXT",)
    FUNCTION = "concatenate"
    CATEGORY = TREE_STRINGS

    def concatenate(self, Prepend, Append, Delimiter):
        out = f"{Prepend}{Delimiter}{Append}"
        return (out,)


class StringReplace:
    def __init__(self):
        pass

    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "Text": Field.string(),
                "Pattern": Field.string(),
                "Replace_With": Field.string(),
                "Mode": Field.combo(["Strict", "RegEx"]),
            }
        }

    RETURN_TYPES = ("STRING",)
    RETURN_NAMES = ("TEXT",)
    FUNCTION = "replace"
    CATEGORY = TREE_STRINGS

    def replace(self, Text: str, Pattern: str, Replace_With: str, Mode: str):
        out = Text
        Pattern = Pattern.encode().decode("unicode_escape")
        match Mode:
            case "Strict":
                out = Text.replace(Pattern, Replace_With)
            case "RegEx":
                out = re.sub(Pattern, Replace_With, out, flags=re.MULTILINE)
        return (out,)


class SearchInText:
    def __init__(self):
        pass

    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "Text": Field.string(),
                "Pattern": Field.string(),
                "ConsiderRegister": Field.boolean(default=False),
                "Mode": Field.combo(["Strict", "RegEx"]),
            }
        }

    RETURN_TYPES = ("BOOLEAN", "INT",)
    RETURN_NAMES = ("BOOLEAN", "OCCURRENCES",)
    FUNCTION = "search_in_text"
    CATEGORY = TREE_STRINGS

    def search_in_text(self, Text: str, Pattern: str, ConsiderRegister: bool, Mode: str) -> tuple:
        out = None
        occs = 0
        Pattern = Pattern.encode().decode("unicode_escape")
        if not ConsiderRegister:
            Text = Text.lower()
            Pattern = Pattern.lower()
        match Mode:
            case "Strict":
                while Pattern in Text:
                    out = True
                    occs += 1
                    Text = Text.replace(Pattern, "", 1)
            case "RegEx":
                occs = len(re.findall(Pattern, Text))
                out = bool(occs)
        return (out, occs)