"""Admin CLI commands - admin export/import/clean."""
from __future__ import annotations

from pathlib import Path
from typing import TYPE_CHECKING, Any

import click

from ..utils.output import write_result_output

if TYPE_CHECKING:
    pass


@click.group()
def admin() -> None:
    """Administration commands."""
    pass


@admin.command()
@click.option("--kind", type=click.Choice(["state", "memory", "cache", "quality"]), required=True)
@click.option("--backend", type=click.Choice(["sqlite", "postgresql"]), default="sqlite")
@click.option("--path", help="SQLite database path")
@click.option("--dsn", help="PostgreSQL DSN")
@click.option("--output", "-o", type=click.Path(path_type=Path), help="Write JSON output")
def export(kind: str, backend: str, path: str | None, dsn: str | None, output: Path | None) -> None:
    """Export data from persistent storage."""
    if backend == "sqlite" and not path:
        click.echo(click.style("Error: --path is required for SQLite backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    if backend == "postgresql" and not dsn:
        click.echo(click.style("Error: --dsn is required for PostgreSQL backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    click.echo(f"Exporting {kind} data from {backend}...")
    
    result: dict[str, Any] = {
        "kind": kind,
        "backend": backend,
        "path": path,
        "dsn": dsn,
        "data": [],
    }
    
    if kind == "state":
        result["data"] = _export_state(backend, path, dsn)
    elif kind == "memory":
        result["data"] = _export_memory(backend, path, dsn)
    elif kind == "cache":
        result["data"] = _export_cache(backend, path, dsn)
    elif kind == "quality":
        result["data"] = _export_quality(backend, path, dsn)
    
    click.echo(f"✓ Exported {len(result['data'])} records")
    write_result_output(output, result)


@admin.command()
@click.option("--kind", type=click.Choice(["state", "memory", "cache", "quality"]), required=True)
@click.option("--backend", type=click.Choice(["sqlite", "postgresql"]), default="sqlite")
@click.option("--path", help="SQLite database path")
@click.option("--dsn", help="PostgreSQL DSN")
@click.option("--input", "-i", "input_file", type=click.Path(exists=True, path_type=Path), required=True, help="Input JSON file")
def import_data(kind: str, backend: str, path: str | None, dsn: str | None, input_file: Path) -> None:
    """Import data into persistent storage."""
    import json
    
    if backend == "sqlite" and not path:
        click.echo(click.style("Error: --path is required for SQLite backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    if backend == "postgresql" and not dsn:
        click.echo(click.style("Error: --dsn is required for PostgreSQL backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    with open(input_file) as f:
        data = json.load(f)
    
    click.echo(f"Importing {kind} data into {backend}...")
    
    imported = 0
    if kind == "state":
        imported = _import_state(backend, path, dsn, data)
    elif kind == "memory":
        imported = _import_memory(backend, path, dsn, data)
    elif kind == "cache":
        imported = _import_cache(backend, path, dsn, data)
    elif kind == "quality":
        imported = _import_quality(backend, path, dsn, data)
    
    click.echo(f"✓ Imported {imported} records")


@admin.command()
@click.option("--kind", type=click.Choice(["state", "memory", "cache", "quality"]), required=True)
@click.option("--backend", type=click.Choice(["sqlite", "postgresql"]), default="sqlite")
@click.option("--path", help="SQLite database path")
@click.option("--dsn", help="PostgreSQL DSN")
@click.option("--force", is_flag=True, help="Skip confirmation")
def clean(kind: str, backend: str, path: str | None, dsn: str | None, force: bool) -> None:
    """Clean data from persistent storage."""
    if backend == "sqlite" and not path:
        click.echo(click.style("Error: --path is required for SQLite backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    if backend == "postgresql" and not dsn:
        click.echo(click.style("Error: --dsn is required for PostgreSQL backend", fg="red", err=True), err=True)
        raise SystemExit(1)
    
    if not force:
        click.echo(click.style(f"⚠️  This will delete all {kind} data from {backend}", fg="yellow", bold=True))
        if not click.confirm("Are you sure?"):
            click.echo("Aborted")
            raise SystemExit(0)
    
    click.echo(f"Cleaning {kind} data from {backend}...")
    
    deleted = 0
    if kind == "state":
        deleted = _clean_state(backend, path, dsn)
    elif kind == "memory":
        deleted = _clean_memory(backend, path, dsn)
    elif kind == "cache":
        deleted = _clean_cache(backend, path, dsn)
    elif kind == "quality":
        deleted = _clean_quality(backend, path, dsn)
    
    click.echo(f"✓ Deleted {deleted} records")


def _export_state(backend: str, path: str | None, dsn: str | None) -> list[dict]:
    """Export state data."""
    # Placeholder - implement based on actual storage structure
    return []


def _export_memory(backend: str, path: str | None, dsn: str | None) -> list[dict]:
    """Export memory data."""
    return []


def _export_cache(backend: str, path: str | None, dsn: str | None) -> list[dict]:
    """Export cache data."""
    return []


def _export_quality(backend: str, path: str | None, dsn: str | None) -> list[dict]:
    """Export quality data."""
    return []


def _import_state(backend: str, path: str | None, dsn: str | None, data: dict) -> int:
    """Import state data."""
    return 0


def _import_memory(backend: str, path: str | None, dsn: str | None, data: dict) -> int:
    """Import memory data."""
    return 0


def _import_cache(backend: str, path: str | None, dsn: str | None, data: dict) -> int:
    """Import cache data."""
    return 0


def _import_quality(backend: str, path: str | None, dsn: str | None, data: dict) -> int:
    """Import quality data."""
    return 0


def _clean_state(backend: str, path: str | None, dsn: str | None) -> int:
    """Clean state data."""
    return 0


def _clean_memory(backend: str, path: str | None, dsn: str | None) -> int:
    """Clean memory data."""
    return 0


def _clean_cache(backend: str, path: str | None, dsn: str | None) -> int:
    """Clean cache data."""
    return 0


def _clean_quality(backend: str, path: str | None, dsn: str | None) -> int:
    """Clean quality data."""
    return 0


__all__ = ["admin", "export", "import_data", "clean"]
