import hashlib
import os
import time

from pr.editor import RPEditor

from ..tools.patch import display_content_diff
from ..ui.diff_display import get_diff_stats
from ..ui.edit_feedback import track_edit, tracker

_id = 0


def get_uid():
    global _id
    _id += 3
    return _id


def read_file(filepath, db_conn=None):
    try:
        path = os.path.expanduser(filepath)
        with open(path) as f:
            content = f.read()
        if db_conn:
            from pr.tools.database import db_set

            db_set("read:" + path, "true", db_conn)
        return {"status": "success", "content": content}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def write_file(filepath, content, db_conn=None, show_diff=True):
    try:
        path = os.path.expanduser(filepath)
        old_content = ""
        is_new_file = not os.path.exists(path)

        if not is_new_file and db_conn:
            from pr.tools.database import db_get

            read_status = db_get("read:" + path, db_conn)
            if read_status.get("status") != "success" or read_status.get("value") != "true":
                return {
                    "status": "error",
                    "error": "File must be read before writing. Please read the file first.",
                }

        if not is_new_file:
            with open(path) as f:
                old_content = f.read()

        operation = track_edit("WRITE", filepath, content=content, old_content=old_content)
        tracker.mark_in_progress(operation)

        if show_diff and not is_new_file:
            diff_result = display_content_diff(old_content, content, filepath)
            if diff_result["status"] == "success":
                print(diff_result["visual_diff"])

        editor = RPEditor(path)
        editor.set_text(content)
        editor.save_file()

        if os.path.exists(path) and db_conn:
            try:
                cursor = db_conn.cursor()
                file_hash = hashlib.md5(old_content.encode()).hexdigest()

                cursor.execute(
                    "SELECT MAX(version) FROM file_versions WHERE filepath = ?",
                    (filepath,),
                )
                result = cursor.fetchone()
                version = (result[0] + 1) if result[0] else 1

                cursor.execute(
                    """INSERT INTO file_versions (filepath, content, hash, timestamp, version)
                                  VALUES (?, ?, ?, ?, ?)""",
                    (filepath, old_content, file_hash, time.time(), version),
                )
                db_conn.commit()
            except Exception:
                pass

        tracker.mark_completed(operation)

        message = f"File written to {path}"
        if show_diff and not is_new_file:
            stats = get_diff_stats(old_content, content)
            message += f" ({stats['insertions']}+ {stats['deletions']}-)"

        return {"status": "success", "message": message}
    except Exception as e:
        if "operation" in locals():
            tracker.mark_failed(operation)
        return {"status": "error", "error": str(e)}


def list_directory(path=".", recursive=False):
    try:
        path = os.path.expanduser(path)
        items = []
        if recursive:
            for root, dirs, files in os.walk(path):
                for name in files:
                    item_path = os.path.join(root, name)
                    items.append(
                        {
                            "path": item_path,
                            "type": "file",
                            "size": os.path.getsize(item_path),
                        }
                    )
                for name in dirs:
                    items.append({"path": os.path.join(root, name), "type": "directory"})
        else:
            for item in os.listdir(path):
                item_path = os.path.join(path, item)
                items.append(
                    {
                        "name": item,
                        "type": "directory" if os.path.isdir(item_path) else "file",
                        "size": (os.path.getsize(item_path) if os.path.isfile(item_path) else None),
                    }
                )
        return {"status": "success", "items": items}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def mkdir(path):
    try:
        os.makedirs(os.path.expanduser(path), exist_ok=True)
        return {"status": "success", "message": f"Directory created at {path}"}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def chdir(path):
    try:
        os.chdir(os.path.expanduser(path))
        return {"status": "success", "new_path": os.getcwd()}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def getpwd():
    try:
        return {"status": "success", "path": os.getcwd()}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def index_source_directory(path):
    extensions = [
        ".py",
        ".js",
        ".ts",
        ".java",
        ".cpp",
        ".c",
        ".h",
        ".hpp",
        ".html",
        ".css",
        ".json",
        ".xml",
        ".md",
        ".sh",
        ".rb",
        ".go",
    ]
    source_files = []
    try:
        for root, _, files in os.walk(os.path.expanduser(path)):
            for file in files:
                if any(file.endswith(ext) for ext in extensions):
                    filepath = os.path.join(root, file)
                    try:
                        with open(filepath, encoding="utf-8") as f:
                            content = f.read()
                        source_files.append({"path": filepath, "content": content})
                    except Exception:
                        continue
        return {"status": "success", "indexed_files": source_files}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def search_replace(filepath, old_string, new_string, db_conn=None):
    try:
        path = os.path.expanduser(filepath)
        if not os.path.exists(path):
            return {"status": "error", "error": "File does not exist"}
        if db_conn:
            from pr.tools.database import db_get

            read_status = db_get("read:" + path, db_conn)
            if read_status.get("status") != "success" or read_status.get("value") != "true":
                return {
                    "status": "error",
                    "error": "File must be read before writing. Please read the file first.",
                }
        with open(path) as f:
            content = f.read()
        content = content.replace(old_string, new_string)
        with open(path, "w") as f:
            f.write(content)
        return {
            "status": "success",
            "message": f"Replaced '{old_string}' with '{new_string}' in {path}",
        }
    except Exception as e:
        return {"status": "error", "error": str(e)}


_editors = {}


def get_editor(filepath):
    if filepath not in _editors:
        _editors[filepath] = RPEditor(filepath)
    return _editors[filepath]


def close_editor(filepath):
    try:
        path = os.path.expanduser(filepath)
        editor = get_editor(path)
        editor.close()
        return {"status": "success", "message": f"Editor closed for {path}"}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def open_editor(filepath):
    try:
        path = os.path.expanduser(filepath)
        editor = RPEditor(path)
        editor.start()
        return {"status": "success", "message": f"Editor opened for {path}"}
    except Exception as e:
        return {"status": "error", "error": str(e)}


def editor_insert_text(filepath, text, line=None, col=None, show_diff=True, db_conn=None):
    try:
        path = os.path.expanduser(filepath)
        if db_conn:
            from pr.tools.database import db_get

            read_status = db_get("read:" + path, db_conn)
            if read_status.get("status") != "success" or read_status.get("value") != "true":
                return {
                    "status": "error",
                    "error": "File must be read before writing. Please read the file first.",
                }

        old_content = ""
        if os.path.exists(path):
            with open(path) as f:
                old_content = f.read()

        position = (line if line is not None else 0) * 1000 + (col if col is not None else 0)
        operation = track_edit("INSERT", filepath, start_pos=position, content=text)
        tracker.mark_in_progress(operation)

        editor = get_editor(path)
        if line is not None and col is not None:
            editor.move_cursor_to(line, col)
        editor.insert_text(text)
        editor.save_file()

        if show_diff and old_content:
            with open(path) as f:
                new_content = f.read()
            diff_result = display_content_diff(old_content, new_content, filepath)
            if diff_result["status"] == "success":
                print(diff_result["visual_diff"])

        tracker.mark_completed(operation)
        return {"status": "success", "message": f"Inserted text in {path}"}
    except Exception as e:
        if "operation" in locals():
            tracker.mark_failed(operation)
        return {"status": "error", "error": str(e)}


def editor_replace_text(
    filepath,
    start_line,
    start_col,
    end_line,
    end_col,
    new_text,
    show_diff=True,
    db_conn=None,
):
    try:
        path = os.path.expanduser(filepath)
        if db_conn:
            from pr.tools.database import db_get

            read_status = db_get("read:" + path, db_conn)
            if read_status.get("status") != "success" or read_status.get("value") != "true":
                return {
                    "status": "error",
                    "error": "File must be read before writing. Please read the file first.",
                }

        old_content = ""
        if os.path.exists(path):
            with open(path) as f:
                old_content = f.read()

        start_pos = start_line * 1000 + start_col
        end_pos = end_line * 1000 + end_col
        operation = track_edit(
            "REPLACE",
            filepath,
            start_pos=start_pos,
            end_pos=end_pos,
            content=new_text,
            old_content=old_content,
        )
        tracker.mark_in_progress(operation)

        editor = get_editor(path)
        editor.replace_text(start_line, start_col, end_line, end_col, new_text)
        editor.save_file()

        if show_diff and old_content:
            with open(path) as f:
                new_content = f.read()
            diff_result = display_content_diff(old_content, new_content, filepath)
            if diff_result["status"] == "success":
                print(diff_result["visual_diff"])

        tracker.mark_completed(operation)
        return {"status": "success", "message": f"Replaced text in {path}"}
    except Exception as e:
        if "operation" in locals():
            tracker.mark_failed(operation)
        return {"status": "error", "error": str(e)}


def display_edit_summary():
    from ..ui.edit_feedback import display_edit_summary

    return display_edit_summary()


def display_edit_timeline(show_content=False):
    from ..ui.edit_feedback import display_edit_timeline

    return display_edit_timeline(show_content)


def clear_edit_tracker():
    from ..ui.edit_feedback import clear_tracker

    clear_tracker()
    return {"status": "success", "message": "Edit tracker cleared"}