package tron

import (
  "strings"
  "time"
)

// Client is the subset of tronpy's Tron client used by kisstron.
type Client struct {
  provider *HTTPProvider
  network  string
  feeLimit int64
}

// NewClient builds a client for the given network and node endpoint. A zero or
// empty endpoint selects the network default.
func NewClient(network, endpoint string, feeLimit int64, apiKey string) *Client {
  return &Client{
    provider: NewHTTPProvider(endpoint, 20*time.Second, apiKey),
    network:  network,
    feeLimit: feeLimit,
  }
}

// Provider exposes the underlying HTTP provider (used for diagnostics).
func (c *Client) Provider() *HTTPProvider { return c.provider }

func (c *Client) GetAccount(addr string) (map[string]any, error) {
  b58, err := ToBase58CheckAddress(addr)
  if err != nil {
    return nil, err
  }
  ret, err := c.provider.makeRequest("wallet/getaccount", map[string]any{"address": b58, "visible": true})
  if err != nil {
    return nil, err
  }
  if len(ret) == 0 {
    return nil, ErrAddressNotFound
  }
  return ret, nil
}

func (c *Client) GetAccountResource(addr string) (map[string]any, error) {
  b58, err := ToBase58CheckAddress(addr)
  if err != nil {
    return nil, err
  }
  ret, err := c.provider.makeRequest("wallet/getaccountresource", map[string]any{"address": b58, "visible": true})
  if err != nil {
    return nil, err
  }
  if len(ret) == 0 {
    return nil, ErrAddressNotFound
  }
  return ret, nil
}

func (c *Client) getLatestSolidBlockID() (string, error) {
  info, err := c.provider.makeRequest("wallet/getnodeinfo", nil)
  if err != nil {
    return "", err
  }
  block, _ := info["solidityBlock"].(string)
  if block == "" {
    return "", ErrAPI
  }
  return block[strings.LastIndex(block, ",ID:")+4:], nil
}

func (c *Client) broadcast(tx *Transaction) (map[string]any, error) {
  payload, err := c.provider.makeRequest("wallet/broadcasttransaction", tx)
  if err != nil {
    return nil, err
  }
  if err := handleAPIError(payload); err != nil {
    return nil, err
  }
  if _, ok := payload["txid"]; !ok {
    payload["txid"] = tx.TxID
  }
  return payload, nil
}

func (c *Client) getTransactionInfo(txid string) (map[string]any, error) {
  if len(txid) != 64 {
    return nil, ErrBadHash
  }
  ret, err := c.provider.makeRequest("wallet/gettransactioninfobyid", map[string]any{"value": txid, "visible": true})
  if err != nil {
    return nil, err
  }
  if err := handleAPIError(ret); err != nil {
    return nil, err
  }
  if len(ret) == 0 {
    return nil, ErrTransactionNotFound
  }
  return ret, nil
}

func (c *Client) GetContract(addr string) (*Contract, error) {
  b58, err := ToBase58CheckAddress(addr)
  if err != nil {
    return nil, err
  }
  info, err := c.provider.makeRequest("wallet/getcontract", map[string]any{"value": b58, "visible": true})
  if err != nil {
    return nil, err
  }
  if err := handleAPIError(info); err != nil {
    return nil, wrapErr(ErrContractNotFound, err.Error())
  }
  return &Contract{Address: b58, client: c}, nil
}

// triggerConstantContract performs a read-only contract call and returns the
// first constant result (hex, without 0x).
func (c *Client) triggerConstantContract(owner, contractAddr, functionSelector, parameter string) (string, error) {
  ownerB58, err := ToBase58CheckAddress(owner)
  if err != nil {
    return "", err
  }
  contractB58, err := ToBase58CheckAddress(contractAddr)
  if err != nil {
    return "", err
  }
  ret, err := c.provider.makeRequest("wallet/triggerconstantcontract", map[string]any{
    "owner_address":     ownerB58,
    "contract_address":  contractB58,
    "function_selector": functionSelector,
    "parameter":         parameter,
    "visible":           true,
  })
  if err != nil {
    return "", err
  }
  if err := handleAPIError(ret); err != nil {
    return "", err
  }
  if res, ok := ret["result"].(map[string]any); ok {
    if _, bad := res["message"]; bad {
      return "", ErrTvm
    }
  }
  results, ok := ret["constant_result"].([]any)
  if !ok || len(results) == 0 {
    return "", ErrTvm
  }
  first, _ := results[0].(string)
  return first, nil
}