# --- FILE: gitsync_tool/gui/dialogs.py ---

import tkinter as tk
from tkinter import ttk, messagebox, simpledialog, filedialog
import os
import re  # Per validazione nomi branch/tag
from typing import Optional, Tuple

# --- Tooltip (non necessario qui, i dialoghi sono semplici) ---

# --- Costanti (non necessarie qui) ---


class CreateTagDialog(simpledialog.Dialog):
    """
    Dialog to get tag name and message from the user for creating
    an annotated Git tag.
    """

    def __init__(
        self, parent, title: str = "Create New Tag", suggested_tag_name: str = ""
    ):
        """
        Initialize the dialog.

        Args:
            parent: The parent window.
            title (str): The title for the dialog window.
            suggested_tag_name (str): A pre-filled suggestion for the tag name.
        """
        self.tag_name_var = tk.StringVar()
        self.tag_message_var = tk.StringVar()
        # self.result will store the tuple (tag_name, tag_message) on success
        self.result: Optional[Tuple[str, str]] = None
        self.suggested_tag_name: str = suggested_tag_name
        # Call Dialog's __init__ AFTER setting up variables needed by body()
        super().__init__(parent, title=title)

    # Override
    def body(self, master: tk.Frame) -> Optional[tk.Widget]:
        """Creates the dialog body with entry fields."""
        # Use a ttk.Frame for better padding and layout control
        frame = ttk.Frame(master, padding="10")
        frame.pack(fill="x", expand=True)
        frame.columnconfigure(1, weight=1)  # Make the entry column expandable

        # Tag Name Row
        ttk.Label(frame, text="Tag Name:").grid(
            row=0, column=0, padx=5, pady=5, sticky="w"
        )
        self.name_entry = ttk.Entry(frame, textvariable=self.tag_name_var, width=40)
        self.name_entry.grid(row=0, column=1, padx=5, pady=5, sticky="ew")
        # Pre-fill suggested name if provided
        if self.suggested_tag_name:
            self.tag_name_var.set(self.suggested_tag_name)

        # Tag Message Row
        ttk.Label(frame, text="Tag Message:").grid(
            row=1, column=0, padx=5, pady=5, sticky="w"
        )
        self.message_entry = ttk.Entry(
            frame, textvariable=self.tag_message_var, width=40
        )
        self.message_entry.grid(row=1, column=1, padx=5, pady=5, sticky="ew")

        # Return the widget that should have initial focus
        return self.name_entry

    # Override
    def validate(self) -> bool:
        """Validates the input before closing the dialog."""
        name = self.tag_name_var.get().strip()
        msg = self.tag_message_var.get().strip()

        if not name:
            messagebox.showwarning(
                "Input Error", "Tag name cannot be empty.", parent=self
            )
            self.name_entry.focus_set()  # Focus back to name entry
            return False  # Validation failed

        # Basic Git tag name validation (adjust regex if needed)
        # Avoids common invalid characters and patterns like '..', '.git', ending ., /
        # Ref: https://git-scm.com/docs/git-check-ref-format
        pattern = r"^(?!\.|/|.*@\{|.*\\)(?!.*\.lock$)(?!.*\.\.$)[^ \t\n\r\f\v~^:?*\[]+(?<!\.)$"
        if not re.match(pattern, name):
            messagebox.showwarning(
                "Input Error",
                f"Invalid tag name format: '{name}'.\n"
                f"Tags cannot contain spaces, control chars, or standard invalid path chars (~^:?*[]\\), "
                f"and cannot start/end with '.' or '/', or contain '..', '.lock', '@{{'.",
                parent=self,
            )
            self.name_entry.focus_set()
            return False

        if not msg:
            messagebox.showwarning(
                "Input Error",
                "Tag message cannot be empty (for annotated tag).",
                parent=self,
            )
            self.message_entry.focus_set()  # Focus back to message entry
            return False  # Validation failed

        return True  # Validation successful

    # Override
    def apply(self) -> None:
        """Processes the validated data and stores it in self.result."""
        # Store the cleaned data as a tuple
        self.result = (
            self.tag_name_var.get().strip(),
            self.tag_message_var.get().strip(),
        )


class CreateBranchDialog(simpledialog.Dialog):
    """Dialog to get a new branch name from the user."""

    def __init__(self, parent, title: str = "Create New Branch"):
        """Initialize the dialog."""
        self.branch_name_var = tk.StringVar()
        self.result: Optional[str] = None
        super().__init__(parent, title=title)

    # Override
    def body(self, master: tk.Frame) -> Optional[tk.Widget]:
        """Creates the dialog body."""
        frame = ttk.Frame(master, padding="10")
        frame.pack(fill="x", expand=True)
        frame.columnconfigure(1, weight=1)

        ttk.Label(frame, text="New Branch Name:").grid(
            row=0, column=0, padx=5, pady=10, sticky="w"
        )
        self.name_entry = ttk.Entry(frame, textvariable=self.branch_name_var, width=40)
        self.name_entry.grid(row=0, column=1, padx=5, pady=10, sticky="ew")
        return self.name_entry  # Initial focus

    # Override
    def validate(self) -> bool:
        """Validates the branch name input."""
        name = self.branch_name_var.get().strip()
        if not name:
            messagebox.showwarning(
                "Input Error", "Branch name cannot be empty.", parent=self
            )
            self.name_entry.focus_set()
            return False

        # Git branch name validation (similar to tags but allows '/')
        # Ref: https://git-scm.com/docs/git-check-ref-format
        # Cannot start/end with '/', contain '..', spaces, control chars, ~^:?*[\ ]
        # Cannot be exactly 'HEAD'.
        pattern = r"^(?!\.|/)(?!.*@\{|.*\\)(?!.*\.lock$)(?!.*\.\.)(?!.*/$)[^ \t\n\r\f\v~^:?*\[\\]+$"
        if name.lower() == "head" or not re.match(pattern, name):
            messagebox.showwarning(
                "Input Error",
                f"Invalid branch name: '{name}'.\n"
                f"Check for spaces, invalid characters (~^:?*[]\\), consecutive dots, "
                f"starting/ending slashes or dots, '.lock' suffix, or using 'HEAD'.",
                parent=self,
            )
            self.name_entry.focus_set()
            return False
        return True

    # Override
    def apply(self) -> None:
        """Stores the validated branch name."""
        self.result = self.branch_name_var.get().strip()


class CloneFromRemoteDialog(simpledialog.Dialog):
    """Dialog to get Remote URL and Local Parent Directory for cloning."""

    def __init__(self, parent, title: str = "Clone Remote Repository"):
        """Initialize the dialog."""
        self.remote_url_var = tk.StringVar()
        self.local_parent_dir_var = tk.StringVar()
        self.profile_name_var = tk.StringVar()  # Optional profile name
        # self.result will store (url, parent_dir, profile_name_input)
        self.result: Optional[Tuple[str, str, str]] = None

        # Set suggested initial directory for the local folder
        # Default to user's home directory
        self.local_parent_dir_var.set(os.path.expanduser("~"))
        super().__init__(parent, title=title)

    # Override
    def body(self, master: tk.Frame) -> Optional[tk.Widget]:
        """Creates the dialog body."""
        main_frame = ttk.Frame(master, padding="10")
        main_frame.pack(fill="both", expand=True)
        main_frame.columnconfigure(1, weight=1)  # Entry column expands

        row_idx: int = 0

        # Remote URL Row
        ttk.Label(main_frame, text="Remote Repository URL:").grid(
            row=row_idx, column=0, padx=5, pady=5, sticky="w"
        )
        self.url_entry = ttk.Entry(
            main_frame, textvariable=self.remote_url_var, width=60
        )
        self.url_entry.grid(
            row=row_idx, column=1, columnspan=2, padx=5, pady=5, sticky="ew"
        )
        # Consider adding Tooltip here if Tooltip class is imported
        row_idx += 1

        # Local Parent Directory Row
        ttk.Label(main_frame, text="Clone into Directory:").grid(
            row=row_idx, column=0, padx=5, pady=5, sticky="w"
        )
        self.dir_entry = ttk.Entry(
            main_frame, textvariable=self.local_parent_dir_var, width=60
        )
        self.dir_entry.grid(row=row_idx, column=1, padx=5, pady=5, sticky="ew")
        self.browse_button = ttk.Button(
            main_frame, text="Browse...", width=9, command=self._browse_local_dir
        )
        self.browse_button.grid(row=row_idx, column=2, padx=(0, 5), pady=5, sticky="w")
        row_idx += 1

        # Explanatory Label Row
        ttk.Label(
            main_frame,
            text="(A new sub-folder named after the repository will be created inside this directory)",
            font=("Segoe UI", 8),  # Smaller font
            foreground="grey",
        ).grid(row=row_idx, column=1, columnspan=2, padx=5, pady=(0, 5), sticky="w")
        row_idx += 1

        # New Profile Name Row (Optional)
        ttk.Label(main_frame, text="New Profile Name (Optional):").grid(
            row=row_idx, column=0, padx=5, pady=5, sticky="w"
        )
        self.profile_entry = ttk.Entry(
            main_frame, textvariable=self.profile_name_var, width=60
        )
        self.profile_entry.grid(
            row=row_idx, column=1, columnspan=2, padx=5, pady=5, sticky="ew"
        )
        # Consider adding Tooltip here
        row_idx += 1

        return self.url_entry  # Initial focus

    def _browse_local_dir(self) -> None:
        """Callback for the local directory browse button."""
        current_path: str = self.local_parent_dir_var.get()
        initial_dir: str = (
            current_path if os.path.isdir(current_path) else os.path.expanduser("~")
        )
        directory: Optional[str] = filedialog.askdirectory(
            initialdir=initial_dir,
            title="Select Parent Directory for Clone",
            parent=self,  # Modal to this dialog
        )
        if directory:
            self.local_parent_dir_var.set(directory)

    # Override
    def validate(self) -> bool:
        """Validates the input fields before closing."""
        url: str = self.remote_url_var.get().strip()
        parent_dir: str = self.local_parent_dir_var.get().strip()
        profile_name: str = self.profile_name_var.get().strip()

        if not url:
            messagebox.showwarning(
                "Input Error", "Remote Repository URL cannot be empty.", parent=self
            )
            self.url_entry.focus_set()
            return False

        # Basic URL check (not exhaustive)
        if not (
            url.startswith("http://")
            or url.startswith("https://")
            or url.startswith("ssh://")
            or ("@" in url and ":" in url)  # Heuristic for git@server:path
        ):
            if not messagebox.askokcancel(
                "URL Format Warning",
                f"The URL '{url}' does not look like a standard HTTPS, HTTP, or SSH URL.\n\nProceed anyway?",
                icon=messagebox.WARNING,  # Use constant
                parent=self,
            ):
                self.url_entry.focus_set()
                return False

        if not parent_dir:
            messagebox.showwarning(
                "Input Error", "Parent Local Directory cannot be empty.", parent=self
            )
            self.dir_entry.focus_set()
            return False

        if not os.path.isdir(parent_dir):
            messagebox.showwarning(
                "Input Error",
                f"The selected parent directory does not exist:\n{parent_dir}",
                parent=self,
            )
            self.dir_entry.focus_set()
            return False

        # Optional profile name validation could be added here if needed
        # e.g., check for invalid characters for profile names

        return True  # Validation successful

    # Override
    def apply(self) -> None:
        """Stores the validated result."""
        # Return a tuple with the cleaned values
        self.result = (
            self.remote_url_var.get().strip(),
            self.local_parent_dir_var.get().strip(),
            self.profile_name_var.get().strip(),  # Return empty string if not provided
        )


# --- END OF FILE gitsync_tool/gui/dialogs.py ---