"""
rpc.methods.phase2 - Phase 2 AICF+ENA RPC Methods
==================================================

GPU provider registration, compute receipts, payout claims, and training receipts.
"""

from __future__ import annotations

from typing import Any, Dict, List, Optional

from rpc.errors import RpcError
from rpc.methods import method

__all__ = []  # Methods are auto-registered via @method decorator


# ============================================================================
# Provider Registration & Management
# ============================================================================

@method(
    name="aicf.registerProvider",
    desc="Register as an AICF provider (GPU contributor)",
    aliases=("aicf_registerProvider",)
)
async def register_provider(
    address: str,
    capabilities: Dict[str, Any],
    payout_address: Optional[str] = None,
    bond_amount: Optional[int] = None,
) -> Dict[str, Any]:
    """
    Register as an AICF GPU provider.
    
    Args:
        address: Provider address (bech32m format)
        capabilities: Provider capabilities object:
            - model_family: str (e.g., "nvidia-h100")
            - max_context: int (max tokens)
            - throughput: int (tokens/sec)
            - memory_gb: int (VRAM in GB)
            - price_per_1k_input: int (optional, nano-ANM)
            - price_per_1k_output: int (optional, nano-ANM)
        payout_address: Optional payout address (defaults to provider address)
        bond_amount: Optional anti-spam bond (nano-ANM)
    
    Returns:
        {
            "provider_id": str,
            "status": str,
            "registered_at": int (timestamp),
            "bond_required": int (if applicable)
        }
    
    Raises:
        RpcError: If registration fails (insufficient bond, not allowlisted, etc.)
    """
    # Phase 2: Provider registration (PHASE2_IMPLEMENTATION_SUMMARY.md)
    # 
    # Implementation path:
    # 1. Validate capabilities (model_family, max_context, etc.)
    # 2. Check bond requirement (if permissionless mode)
    # 3. Check allowlist (if allowlist mode)
    # 4. Create provider record in registry
    # 5. Emit registration event
    # 6. Return provider_id and status
    # 
    # Example:
    # from aicf.registry import ProviderRegistry
    # registry = ProviderRegistry(ctx.state_db)
    # provider_id = registry.register(
    #     address=address,
    #     capabilities=capabilities,
    #     bond=bond,
    #     allowlist=ctx.params.get("aicf_provider_allowlist")
    # )
    # return {"provider_id": provider_id, "status": "registered", ...}
    
    raise RpcError(
        code=-32601,
        message="aicf.registerProvider not yet implemented (Phase 2 - provider onboarding)"
    )


@method(
    name="aicf.getProvider",
    desc="Get provider information by ID",
    aliases=("aicf_getProvider",)
)
async def get_provider(provider_id: str) -> Dict[str, Any]:
    """
    Get detailed provider information.
    
    Args:
        provider_id: Provider identifier
    
    Returns:
        {
            "id": str,
            "status": str,
            "capabilities": { model_family, max_context, ... },
            "reputation": {
                "successful_jobs": int,
                "failed_jobs": int,
                "success_rate": float,
                "avg_latency_ms": float,
                "overall_score": float
            },
            "stake": int,
            "bond": int,
            "payout_address": str,
            "created_at": int,
            "last_heartbeat": int
        }
    """
    # Phase 2: Provider information retrieval (PHASE2_IMPLEMENTATION_SUMMARY.md)
    # 
    # Implementation path:
    # 1. Load provider record from registry
    # 2. Calculate reputation metrics from job history
    # 3. Return provider details
    # 
    # Example:
    # from aicf.registry import ProviderRegistry
    # registry = ProviderRegistry(ctx.state_db)
    # provider = registry.get(provider_id)
    # if not provider:
    #     raise RpcError(code=-32602, message=f"Provider {provider_id} not found")
    # return provider.to_dict()
    
    raise RpcError(
        code=-32601,
        message="aicf.getProvider not yet implemented (Phase 2 - provider registry)"
    )


@method(
    name="aicf.listProviders",
    desc="List all registered AICF providers",
    aliases=("aicf_listProviders",)
)
async def list_providers(
    offset: int = 0,
    limit: int = 100,
    status_filter: Optional[str] = None,
) -> Dict[str, Any]:
    """
    List registered providers with pagination.
    
    Args:
        offset: Pagination offset
        limit: Max results (default 100, max 1000)
        status_filter: Optional filter ("active", "jailed", etc.)
    
    Returns:
        {
            "providers": [{ id, status, capabilities, reputation, ... }],
            "total": int,
            "offset": int,
            "limit": int
        }
    """
    # Phase 2: List providers (provider registry integration pending)
    raise RpcError(code=-32601, message="aicf.listProviders not yet implemented")


# ============================================================================
# Compute Receipts (ENA Useful Work)
# ============================================================================

@method(
    name="ena.getQuote",
    desc="Get fee quote and provider selection hints for ENA call",
    aliases=("ena_getQuote",)
)
async def get_quote(
    tokens_in: int,
    tokens_out: int,
    model_id: Optional[str] = None,
) -> Dict[str, Any]:
    """
    Get fee quote for an ENA inference call.
    
    Args:
        tokens_in: Estimated input tokens
        tokens_out: Estimated output tokens
        model_id: Optional model ID (defaults to current ENA model)
    
    Returns:
        {
            "fee_estimate": int (nano-ANM),
            "aicf_cut": int,
            "provider_cut": int,
            "recommended_providers": [
                {
                    "provider_id": str,
                    "price_per_1k_input": int,
                    "price_per_1k_output": int,
                    "availability_score": float,
                    "latency_estimate_ms": float
                }
            ]
        }
    """
    # Phase 2: Provider quote logic (ENA fee market integration pending)
    # 1. Calculate base fee from params (ena_call_fee_base_nano)
    # 2. Apply per-token pricing
    # 3. Split into AICF/provider cuts
    # 4. Query available providers and rank by price/latency/reputation
    
    raise RpcError(code=-32601, message="ena.getQuote not yet implemented")


@method(
    name="ena.submitReceipt",
    desc="Anchor compute receipt hash on-chain",
    aliases=("ena_submitReceipt",)
)
async def submit_receipt(receipt_cbor: str) -> Dict[str, Any]:
    """
    Submit a compute receipt for anchoring.
    
    Args:
        receipt_cbor: Hex-encoded CBOR serialized ComputeReceipt
    
    Returns:
        {
            "receipt_hash": str (hex),
            "tx_hash": str (hex),
            "anchored_at_height": int,
            "status": "pending" | "confirmed"
        }
    
    Raises:
        RpcError: If receipt is invalid or submission fails
    """
    # Phase 2: Receipt submission (ENA proof verification integration pending)
    # 1. Decode CBOR receipt
    # 2. Validate receipt fields
    # 3. Verify signatures
    # 4. Compute receipt hash
    # 5. Create ENA_SUBMIT_RECEIPT transaction
    # 6. Submit to mempool
    # 7. Return tx hash and receipt hash
    
    raise RpcError(code=-32601, message="ena.submitReceipt not yet implemented")


@method(
    name="ena.getReceipt",
    desc="Get compute receipt by hash",
    aliases=("ena_getReceipt",)
)
async def get_receipt(receipt_hash: str) -> Dict[str, Any]:
    """
    Get compute receipt details by hash.
    
    Args:
        receipt_hash: 32-byte receipt hash (hex)
    
    Returns:
        {
            "receipt_hash": str,
            "job_id": str,
            "requester_address": str,
            "provider_id": str,
            "model_id": str,
            "tokens_in": int,
            "tokens_out": int,
            "fee_paid": int,
            "aicf_cut": int,
            "provider_cut": int,
            "timestamp": int,
            "expiry": int,
            "anchored_at_height": int,
            "is_matured": bool,
            "da_commitment": str (optional)
        }
    """
    # Phase 2: Receipt retrieval (ENA receipt storage integration pending)
    raise RpcError(code=-32601, message="ena.getReceipt not yet implemented")


# ============================================================================
# Payout & Reward Claims
# ============================================================================

@method(
    name="aicf.getProviderRewards",
    desc="Get accrued rewards for a provider",
    aliases=("aicf_getProviderRewards",)
)
async def get_provider_rewards(provider_id: str) -> Dict[str, Any]:
    """
    Get provider's accrued and claimable rewards.
    
    Args:
        provider_id: Provider identifier
    
    Returns:
        {
            "provider_id": str,
            "total_accrued": int (nano-ANM),
            "total_claimed": int,
            "claimable": int,
            "epochs": [
                {
                    "epoch": int,
                    "accrued": int,
                    "claimed": int,
                    "is_finalized": bool,
                    "receipt_count": int,
                    "tokens_processed": int
                }
            ]
        }
    """
    # Phase 2: Provider rewards query (AICF accounting integration pending)
    # 1. Query provider accrual records
    # 2. Sum across finalized epochs
    # 3. Return breakdown by epoch
    
    raise RpcError(code=-32601, message="aicf.getProviderRewards not yet implemented")


@method(
    name="aicf.claimProviderRewards",
    desc="Claim accrued provider rewards",
    aliases=("aicf_claimProviderRewards",)
)
async def claim_provider_rewards(
    provider_id: str,
    to_address: str,
    amount: int,
    epochs: Optional[List[int]] = None,
) -> Dict[str, Any]:
    """
    Claim provider rewards (read-only, returns tx data).
    
    Args:
        provider_id: Provider identifier
        to_address: Destination address for rewards
        amount: Amount to claim (nano-ANM)
        epochs: Optional list of specific epochs to claim from
    
    Returns:
        {
            "tx_data": str (hex-encoded unsigned tx),
            "claimable_amount": int,
            "claim_count": int,
            "epochs_claimed": [int]
        }
    
    Raises:
        RpcError: If amount exceeds claimable, not finalized, etc.
    """
    # Phase 2: Provider rewards claim (AICF claim transaction integration pending)
    # 1. Validate provider exists
    # 2. Validate epochs are finalized
    # 3. Validate amount <= claimable
    # 4. Build AICF_CLAIM_PROVIDER_REWARDS transaction
    # 5. Return unsigned tx for signing
    
    raise RpcError(code=-32601, message="aicf.claimProviderRewards not yet implemented")


@method(
    name="aicf.getEpochStatus",
    desc="Get current epoch and payout status",
    aliases=("aicf_getEpochStatus",)
)
async def get_epoch_status() -> Dict[str, Any]:
    """
    Get current epoch and payout accounting status.
    
    Returns:
        {
            "current_epoch": int,
            "current_height": int,
            "epoch_start_height": int,
            "epoch_end_height": int,
            "blocks_until_finalization": int,
            "pool_balance": int (nano-ANM),
            "epoch_inflow": int,
            "epoch_distributed": int,
            "reserve_held": int,
            "maturity_depth": int,
            "epoch_length": int
        }
    """
    # Phase 2: Epoch status query (AICF epoch tracking integration pending)
    # 1. Get current chain height
    # 2. Compute current epoch
    # 3. Get pool balance
    # 4. Get epoch accounting data
    # 5. Return comprehensive status
    
    raise RpcError(code=-32601, message="aicf.getEpochStatus not yet implemented")


@method(
    name="aicf.getMaturityDepth",
    desc="Get maturity depth configuration",
    aliases=("aicf_getMaturityDepth",)
)
async def get_maturity_depth() -> Dict[str, Any]:
    """
    Get maturity depth and finalization config.
    
    Returns:
        {
            "maturity_depth_blocks": int,
            "epoch_length_blocks": int,
            "reserve_ratio_bps": int,
            "payout_mode": "pull" | "push",
            "min_claim_amount": int,
            "max_claims_per_epoch": int
        }
    """
    # Phase 2: Maturity config (AICF params integration pending)
    raise RpcError(code=-32601, message="aicf.getMaturityDepth not yet implemented")


# ============================================================================
# Training Receipts (Mining → AI Training Link)
# ============================================================================

@method(
    name="aicf.submitTrainingReceipt",
    desc="Submit training contribution receipt for miner credit",
    aliases=("aicf_submitTrainingReceipt",)
)
async def submit_training_receipt(receipt_cbor: str) -> Dict[str, Any]:
    """
    Submit a training receipt for miner AICF credit.
    
    Args:
        receipt_cbor: Hex-encoded CBOR serialized TrainingReceipt
    
    Returns:
        {
            "receipt_hash": str,
            "training_credit": int,
            "miner_address": str,
            "provider_id": str,
            "anchored_at_height": int
        }
    """
    # Phase 2: Training receipt submission (ENA training proof verification pending)
    # 1. Decode CBOR receipt
    # 2. Validate training receipt fields
    # 3. Verify provider signature
    # 4. Compute receipt hash
    # 5. Anchor in block (via attachedProofs or separate tx)
    # 6. Credit miner with training_credit amount
    
    raise RpcError(code=-32601, message="aicf.submitTrainingReceipt not yet implemented")


@method(
    name="aicf.getTrainingReceipt",
    desc="Get training receipt by hash",
    aliases=("aicf_getTrainingReceipt",)
)
async def get_training_receipt(receipt_hash: str) -> Dict[str, Any]:
    """
    Get training receipt details.
    
    Args:
        receipt_hash: 32-byte receipt hash (hex)
    
    Returns:
        {
            "receipt_hash": str,
            "task_id": str,
            "job_type": str,
            "miner_address": str,
            "provider_id": str,
            "gpu_hours": float,
            "cost_paid": int,
            "training_credit": int,
            "epochs_completed": int,
            "samples_processed": int,
            "is_verified": bool
        }
    """
    # Phase 2: Training receipt retrieval (ENA training storage integration pending)
    raise RpcError(code=-32601, message="aicf.getTrainingReceipt not yet implemented")
