from pathlib import Path

from personal_agent.tools.base import Tool, ToolError, ToolResult


class FileSystemListTool(Tool):
    @property
    def name(self) -> str:
        return "filesystem_list"

    @property
    def description(self) -> str:
        return "List files and directories inside the agent's sandbox."

    @property
    def schema(self) -> dict[str, object]:
        return {
            "type": "object",
            "properties": {
                "path": {
                    "type": "string",
                    "description": (
                        "Relative path inside the filesystem sandbox. "
                        "Use '.' for the sandbox root."
                    ),
                },
            },
            "required": ["path"],
        }

    def execute(self, arguments: dict[str, object]) -> ToolResult:
        path = arguments.get("path")

        if not isinstance(path, str):
            raise ToolError("path must be a string")

        sandbox = Path.home() / "Projects" / "personal-agent" / "data"
        target = (sandbox / path).resolve()

        if not target.is_relative_to(sandbox.resolve()):
            raise ToolError("path is outside the filesystem sandbox")

        if not target.exists():
            raise ToolError(f"path does not exist: {path}")

        if not target.is_dir():
            raise ToolError(f"path is not a directory: {path}")

        entries = []

        for entry in sorted(target.iterdir()):
            kind = "directory" if entry.is_dir() else "file"
            entries.append(f"{kind}: {entry.name}")

        if not entries:
            return ToolResult(content="Directory is empty.")

        return ToolResult(content="\n".join(entries))


class FileSystemReadTool(Tool):
    MAX_FILE_SIZE = 1024 * 1024  # 1 MiB

    @property
    def name(self) -> str:
        return "filesystem_read"

    @property
    def description(self) -> str:
        return "Read the contents of a file inside the agent's sandbox."

    @property
    def schema(self) -> dict[str, object]:
        return {
            "type": "object",
            "properties": {
                "path": {
                    "type": "string",
                    "description": ("Relative path inside the filesystem sandbox."),
                },
            },
            "required": ["path"],
        }

    def execute(self, arguments: dict[str, object]) -> ToolResult:
        path = arguments.get("path")

        if not isinstance(path, str):
            raise ToolError("path must be a string")

        sandbox = Path.home() / "Projects" / "personal-agent" / "data"
        sandbox = sandbox.resolve()
        target = (sandbox / path).resolve()

        if not target.is_relative_to(sandbox):
            raise ToolError("path is outside the filesystem sandbox")

        if not target.exists():
            raise ToolError(f"path does not exist: {path}")

        if not target.is_file():
            raise ToolError(f"path is not a file: {path}")

        if target.stat().st_size > self.MAX_FILE_SIZE:
            raise ToolError("file is too large to read")

        try:
            content = target.read_text(encoding="utf-8")
        except ToolError as error:
            raise ToolError("file is not valid UTF-8 text") from error

        return ToolResult(content=content)