package handler

import (
	"encoding/json"
	"net/http"

	"bugulma/backend/internal/domain"
	"bugulma/backend/internal/service"

	"github.com/gin-gonic/gin"
	"gorm.io/datatypes"
)

type ResourceFlowHandler struct {
	resourceService *service.ResourceFlowService
}

func NewResourceFlowHandler(resourceService *service.ResourceFlowService) *ResourceFlowHandler {
	return &ResourceFlowHandler{resourceService: resourceService}
}

type CreateResourceFlowRequest struct {
	OrganizationID string                   `json:"organization_id" binding:"required"`
	SiteID         string                   `json:"site_id" binding:"required"`
	Direction      domain.ResourceDirection `json:"direction" binding:"required"`
	Type           domain.ResourceType      `json:"type" binding:"required"`
	Quality        domain.Quality           `json:"quality"`
	Quantity       domain.Quantity          `json:"quantity"`
	TimeProfile    domain.TimeProfile       `json:"time_profile"`
	EconomicData   domain.EconomicData      `json:"economic_data"`
	Constraints    domain.Constraints       `json:"constraints"`
	ServiceDetails domain.ServiceDetails    `json:"service_details"`
	PrecisionLevel domain.PrecisionLevel    `json:"precision_level"`
	SourceType     domain.SourceType        `json:"source_type"`
}

func (h *ResourceFlowHandler) Create(c *gin.Context) {
	var req CreateResourceFlowRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	flowReq := service.CreateResourceFlowRequest{
		OrganizationID: req.OrganizationID,
		SiteID:         req.SiteID,
		Direction:      req.Direction,
		Type:           req.Type,
		Quality:        req.Quality,
		Quantity:       req.Quantity,
		TimeProfile:    req.TimeProfile,
		EconomicData:   req.EconomicData,
		Constraints:    req.Constraints,
		ServiceDetails: req.ServiceDetails,
		PrecisionLevel: req.PrecisionLevel,
		SourceType:     req.SourceType,
	}

	created, err := h.resourceService.Create(c.Request.Context(), flowReq)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, created)
}

func (h *ResourceFlowHandler) Update(c *gin.Context) {
	id := c.Param("id")

	var req CreateResourceFlowRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	rf, err := h.resourceService.GetByID(c.Request.Context(), id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Resource flow not found"})
		return
	}

	// Update fields
	rf.OrganizationID = req.OrganizationID
	rf.SiteID = req.SiteID
	rf.Direction = req.Direction
	rf.Type = req.Type

	// Marshal JSONB fields
	qualityJSON, _ := json.Marshal(req.Quality)
	quantityJSON, _ := json.Marshal(req.Quantity)
	timeProfileJSON, _ := json.Marshal(req.TimeProfile)
	economicDataJSON, _ := json.Marshal(req.EconomicData)
	constraintsJSON, _ := json.Marshal(req.Constraints)
	serviceDetailsJSON, _ := json.Marshal(req.ServiceDetails)

	rf.Quality = datatypes.JSON(qualityJSON)
	rf.Quantity = datatypes.JSON(quantityJSON)
	rf.TimeProfile = datatypes.JSON(timeProfileJSON)
	rf.EconomicData = datatypes.JSON(economicDataJSON)
	rf.Constraints = datatypes.JSON(constraintsJSON)
	rf.ServiceDetails = datatypes.JSON(serviceDetailsJSON)
	rf.PrecisionLevel = req.PrecisionLevel
	rf.SourceType = req.SourceType

	if err := h.resourceService.Update(c.Request.Context(), rf); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, rf)
}

func (h *ResourceFlowHandler) GetByID(c *gin.Context) {
	id := c.Param("id")

	// If no ID is provided, treat as list request
	if id == "" {
		h.List(c)
		return
	}

	rf, err := h.resourceService.GetByID(c.Request.Context(), id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Resource flow not found"})
		return
	}

	c.JSON(http.StatusOK, rf)
}

// List retrieves all resource flows
func (h *ResourceFlowHandler) List(c *gin.Context) {
	flows, err := h.resourceService.List(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list resource flows"})
		return
	}

	c.JSON(http.StatusOK, flows)
}

func (h *ResourceFlowHandler) GetBySite(c *gin.Context) {
	siteID := c.Param("siteId")

	flows, err := h.resourceService.GetBySiteID(c.Request.Context(), siteID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, flows)
}

func (h *ResourceFlowHandler) GetByOrganization(c *gin.Context) {
	organizationID := c.Param("organizationId")

	flows, err := h.resourceService.GetByOrganizationID(c.Request.Context(), organizationID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, flows)
}

func (h *ResourceFlowHandler) Delete(c *gin.Context) {
	id := c.Param("id")

	if err := h.resourceService.Delete(c.Request.Context(), id); err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Resource flow not found"})
		return
	}

	c.JSON(http.StatusNoContent, nil)
}