package handler

import (
	"bugulma/backend/internal/service"
	"net/http"

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

// SharedAssetHandler handles HTTP requests for shared assets
type SharedAssetHandler struct {
	service *service.SharedAssetService
}

// NewSharedAssetHandler creates a new shared asset handler
func NewSharedAssetHandler(service *service.SharedAssetService) *SharedAssetHandler {
	return &SharedAssetHandler{service: service}
}

// CreateRequest represents the request to create a shared asset
type CreateSharedAssetRequest struct {
	OwnerBusinessID     string  `json:"owner_business_id" binding:"required"`
	SiteID              string  `json:"site_id" binding:"required"`
	Type                string  `json:"type" binding:"required"`
	Description         string  `json:"description"`
	Capacity            float64 `json:"capacity"`
	CapacityUnit        string  `json:"capacity_unit"`
	UtilizationRate     float64 `json:"utilization_rate"`
	AvailabilityPeriod  string  `json:"availability_period"`
	OperationalStatus   string  `json:"operational_status"`
	CostSharingModel    string  `json:"cost_sharing_model"`
	MaintenanceSchedule string  `json:"maintenance_schedule"`
}

// Create creates a new shared asset
// @Summary Create a shared asset
// @Tags shared-assets
// @Accept json
// @Produce json
// @Param asset body CreateSharedAssetRequest true "Shared Asset"
// @Success 201 {object} domain.SharedAsset
// @Router /api/shared-assets [post]
func (h *SharedAssetHandler) Create(c *gin.Context) {
	var req CreateSharedAssetRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	asset, err := h.service.Create(c.Request.Context(), service.CreateSharedAssetRequest{
		OwnerBusinessID:     req.OwnerBusinessID,
		SiteID:              req.SiteID,
		Type:                service.AssetTypeFromString(req.Type),
		Description:         req.Description,
		Capacity:            req.Capacity,
		CapacityUnit:        req.CapacityUnit,
		UtilizationRate:     req.UtilizationRate,
		AvailabilityPeriod:  req.AvailabilityPeriod,
		OperationalStatus:   service.OperationalStatusFromString(req.OperationalStatus),
		CostSharingModel:    req.CostSharingModel,
		MaintenanceSchedule: req.MaintenanceSchedule,
	})

	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, asset)
}

// GetByID retrieves a shared asset by ID
// @Summary Get shared asset by ID
// @Tags shared-assets
// @Produce json
// @Param id path string true "Asset ID"
// @Success 200 {object} domain.SharedAsset
// @Router /api/shared-assets/{id} [get]
func (h *SharedAssetHandler) GetByID(c *gin.Context) {
	id := c.Param("id")
	asset, err := h.service.GetByID(c.Request.Context(), id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Shared asset not found"})
		return
	}
	c.JSON(http.StatusOK, asset)
}

// GetBySite retrieves shared assets at a specific site
// @Summary Get shared assets by site
// @Tags shared-assets
// @Produce json
// @Param siteId path string true "Site ID"
// @Success 200 {array} domain.SharedAsset
// @Router /api/shared-assets/site/{siteId} [get]
func (h *SharedAssetHandler) GetBySite(c *gin.Context) {
	siteID := c.Param("siteId")
	assets, err := h.service.GetBySiteID(c.Request.Context(), siteID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, assets)
}

// GetByOwner retrieves shared assets owned by a specific organization
// @Summary Get shared assets by owner
// @Tags shared-assets
// @Produce json
// @Param organizationId path string true "Organization ID"
// @Success 200 {array} domain.SharedAsset
// @Router /api/shared-assets/owner/{organizationId} [get]
func (h *SharedAssetHandler) GetByOwner(c *gin.Context) {
	ownerID := c.Param("organizationId")
	assets, err := h.service.GetByOwnerBusinessID(c.Request.Context(), ownerID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, assets)
}

// GetAvailable retrieves shared assets with available capacity
// @Summary Get available shared assets
// @Tags shared-assets
// @Produce json
// @Success 200 {array} domain.SharedAsset
// @Router /api/shared-assets/available [get]
func (h *SharedAssetHandler) GetAvailable(c *gin.Context) {
	assets, err := h.service.GetAvailableAssets(c.Request.Context())
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, assets)
}

// Update updates a shared asset
// @Summary Update a shared asset
// @Tags shared-assets
// @Accept json
// @Produce json
// @Param id path string true "Asset ID"
// @Param asset body CreateSharedAssetRequest true "Shared Asset"
// @Success 200 {object} domain.SharedAsset
// @Router /api/shared-assets/{id} [put]
func (h *SharedAssetHandler) Update(c *gin.Context) {
	id := c.Param("id")

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

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

	// Update fields
	asset.OwnerBusinessID = req.OwnerBusinessID
	asset.SiteID = req.SiteID
	asset.Type = service.AssetTypeFromString(req.Type)
	asset.Description = req.Description
	asset.Capacity = req.Capacity
	asset.CapacityUnit = req.CapacityUnit
	asset.UtilizationRate = req.UtilizationRate
	asset.AvailabilityPeriod = req.AvailabilityPeriod
	asset.OperationalStatus = service.OperationalStatusFromString(req.OperationalStatus)
	asset.CostSharingModel = req.CostSharingModel
	asset.MaintenanceSchedule = req.MaintenanceSchedule

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

	c.JSON(http.StatusOK, asset)
}

// Delete deletes a shared asset
// @Summary Delete a shared asset
// @Tags shared-assets
// @Param id path string true "Asset ID"
// @Success 204
// @Router /api/shared-assets/{id} [delete]
func (h *SharedAssetHandler) Delete(c *gin.Context) {
	id := c.Param("id")
	if err := h.service.Delete(c.Request.Context(), id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.Status(http.StatusNoContent)
}