package rest

import (
	"fmt"
	"net/http"
	"sync"

	eth "custodial/pkg/eth"
	store "custodial/pkg/store"
	trc "custodial/pkg/tron"

	gin "github.com/gin-gonic/gin"
)

type CreateAccountRequest struct {
	AccountID string `json:"account_id"`
	Label     string `json:"label"`
	Index     int    `json:"index"`
}

type CreateAccountResponse struct {
	AccountID   string `json:"account_id"`
	Label       string `json:"label"`
	Index       int    `json:"index"`
	TronAddress string `json:"tron_address"`
	EthAddress  string `json:"eth_address"`
}

var amu sync.Mutex

//	@BasePath	/api/v1
//
// CreateAccount godoc
//
//	@Summary	Create a new user account
//	@Schemes
//	@Description	Create a new user account identified by account_id and index (incremental number)
//	@Tags			Account
//	@Accept			json
//	@Produce		json
//	@Security		ApiKeyAuth
//	@Param			message	body		CreateAccountRequest	true	"Account Info"
//	@Success		200		{object}	CreateAccountResponse
//	@Failure		400		{object}	ErrorResponse
//	@Router			/account/create [post]
func CreateAccountV1(c *gin.Context) {
	amu.Lock()
	defer amu.Unlock()

	var req CreateAccountRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	fmt.Println("CreateAccountV1", req.AccountID)
	if req.AccountID == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "account_id is required"})
		return
	}

	if req.Index < 2 || req.Index >= store.MAX_ACCOUNT_INDEX {
		c.JSON(http.StatusBadRequest, gin.H{
			"error": fmt.Sprintf("index is invalid: min index must is 2, max index is %s", store.MAX_ACCOUNT_INDEX-1),
		})
		return
	}

	exEth, _ := store.GetAccount(req.AccountID, store.Ethereum)
	exTrc, _ := store.GetAccount(req.AccountID, store.Tron)
	fmt.Println("exEth", exEth)
	fmt.Println("exTrc", exTrc)
	if exEth != nil && exTrc != nil {
		if exEth.GetAddress() != "" || exTrc.GetAddress() != "" {
			c.JSON(http.StatusBadRequest, gin.H{"error": "account with this id already exists"})
			return
		}
	}

	nextHdIndex := int(req.Index)
	ethAccount, err := eth.DeriveAccount(nextHdIndex)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	tronAccount, err := trc.DeriveAccount(nextHdIndex)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	dbEthAccount := store.EthereumAccount{
		AccountID: req.AccountID,
		Label:     req.Label,
		Address:   ethAccount.Address().String(),
		HDIndex:   nextHdIndex,
	}
	err = store.CreateAccount(&dbEthAccount)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	dbTronAccount := store.TronAccount{
		AccountID: req.AccountID,
		Label:     req.Label,
		Address:   tronAccount.Address(),
		HDIndex:   nextHdIndex,
	}
	err = store.CreateAccount(&dbTronAccount)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"account_id":   req.AccountID,
		"label":        req.Label,
		"index":        nextHdIndex,
		"tron_address": tronAccount.Address(),
		"eth_address":  ethAccount.Address().String(),
	})
}