package blockchain

import (
	"net/http"

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

// Handler handles HTTP requests for blockchain operations
type Handler struct {
	service *BlockchainService
}

// NewHandler creates a new blockchain handler
func NewHandler(service *BlockchainService) *Handler {
	return &Handler{
		service: service,
	}
}

// RegisterRoutes registers the blockchain routes
func (h *Handler) RegisterRoutes(router *gin.Engine) {
	blockchain := router.Group("/blockchain")
	{
		blockchain.POST("/submit-hash", h.HandleSubmitHash)
		blockchain.POST("/propose-insight", h.HandleProposeInsight)
		blockchain.POST("/vote", h.HandleVote)
	}
}

// SubmitHashRequest represents a request to submit a hash
type SubmitHashRequest struct {
	Hash string `json:"hash" binding:"required"`
}

// ProposeInsightRequest represents a request to propose an insight
type ProposeInsightRequest struct {
	Insight string `json:"insight" binding:"required"`
}

// VoteRequest represents a request to vote on an insight
type VoteRequest struct {
	InsightID string `json:"insightId" binding:"required"`
	Vote      bool   `json:"vote"`
}

// Response represents a generic response
type Response struct {
	Success bool   `json:"success"`
	Message string `json:"message"`
	Data    any    `json:"data,omitempty"`
}

// HandleSubmitHash handles requests to submit a hash
func (h *Handler) HandleSubmitHash(c *gin.Context) {
	var req SubmitHashRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, Response{
			Success: false,
			Message: "Invalid request format",
		})
		return
	}

	txHash, err := h.service.SubmitPerspective(req.Hash)
	if err != nil {
		c.JSON(http.StatusInternalServerError, Response{
			Success: false,
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, Response{
		Success: true,
		Message: "Hash submitted successfully",
		Data: map[string]string{
			"transactionHash": txHash,
		},
	})
}

// HandleProposeInsight handles requests to propose an insight
func (h *Handler) HandleProposeInsight(c *gin.Context) {
	var req ProposeInsightRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, Response{
			Success: false,
			Message: "Invalid request format",
		})
		return
	}

	txHash, err := h.service.ProposeInsight(req.Insight)
	if err != nil {
		c.JSON(http.StatusInternalServerError, Response{
			Success: false,
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, Response{
		Success: true,
		Message: "Insight proposed successfully",
		Data: map[string]string{
			"transactionHash": txHash,
		},
	})
}

// HandleVote handles requests to vote on an insight
func (h *Handler) HandleVote(c *gin.Context) {
	var req VoteRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, Response{
			Success: false,
			Message: "Invalid request format",
		})
		return
	}

	txHash, err := h.service.VoteOnInsight(req.InsightID, req.Vote)
	if err != nil {
		c.JSON(http.StatusInternalServerError, Response{
			Success: false,
			Message: err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, Response{
		Success: true,
		Message: "Vote submitted successfully",
		Data: map[string]string{
			"transactionHash": txHash,
		},
	})
}