from __future__ import annotations

from typing import Any, Dict, Sequence
import json

from . import register
import models
import pipeline as ctx
from helper import hydrus as hydrus_wrapper
from ._shared import Cmdlet, CmdletArg, normalize_hash
from helper.logger import log

CMDLET = Cmdlet(
    name="get-note",
    summary="List notes on a Hydrus file.",
    usage="get-note [-hash <sha256>]",
    args=[
        CmdletArg("-hash", description="Override the Hydrus file hash (SHA256) to target instead of the selected result."),
    ],
    details=[
        "- Prints notes by service and note name.",
    ],
)


@register(["get-note", "get-notes", "get_note"])  # aliases
def get_notes(result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
    # Helper to get field from both dict and object
    def get_field(obj: Any, field: str, default: Any = None) -> Any:
        if isinstance(obj, dict):
            return obj.get(field, default)
        else:
            return getattr(obj, field, default)
    
    # Help
    try:
        if any(str(a).lower() in {"-?", "/?", "--help", "-h", "help", "--cmdlet"} for a in args):
            log(json.dumps(CMDLET, ensure_ascii=False, indent=2))
            return 0
    except Exception:
        pass
    
    from ._shared import parse_cmdlet_args
    parsed = parse_cmdlet_args(args, CMDLET)
    override_hash = parsed.get("hash")
    
    hash_hex = normalize_hash(override_hash) if override_hash else normalize_hash(get_field(result, "hash_hex", None))
    if not hash_hex:
        log("Selected result does not include a Hydrus hash")
        return 1
    try:
        client = hydrus_wrapper.get_client(config)
    except Exception as exc:
        log(f"Hydrus client unavailable: {exc}")
        return 1
    
    if client is None:
        log("Hydrus client unavailable")
        return 1
    try:
        payload = client.fetch_file_metadata(hashes=[hash_hex], include_service_keys_to_tags=False, include_notes=True)
    except Exception as exc:
        log(f"Hydrus metadata fetch failed: {exc}")
        return 1
    items = payload.get("metadata") if isinstance(payload, dict) else None
    meta = items[0] if (isinstance(items, list) and items and isinstance(items[0], dict)) else None
    notes = {}
    if isinstance(meta, dict):
        # Hydrus returns service_keys_to_tags; for notes we expect 'service_names_to_notes' in modern API
        notes = meta.get('notes') or meta.get('service_names_to_notes') or {}
    if notes:
        ctx.emit("Notes:")
        # Print flattened: service -> (name: text)
        if isinstance(notes, dict) and any(isinstance(v, dict) for v in notes.values()):
            for svc, mapping in notes.items():
                ctx.emit(f"- {svc}:")
                if isinstance(mapping, dict):
                    for k, v in mapping.items():
                        ctx.emit(f"  • {k}: {str(v).strip()}")
        elif isinstance(notes, dict):
            for k, v in notes.items():
                ctx.emit(f"- {k}: {str(v).strip()}")
    else:
        ctx.emit("No notes found.")
    return 0