package rest

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

	"github.com/gorilla/mux"
	"github.com/ocdp/cluster-service/internal/adapter/input/http/dto"
	"github.com/ocdp/cluster-service/internal/domain/entity"
	"github.com/ocdp/cluster-service/internal/domain/service"
)

// ChartReferenceHandler Chart Reference Handler
type ChartReferenceHandler struct {
	chartRefService *service.ChartReferenceService
}

// NewChartReferenceHandler 创建 Chart Reference Handler
func NewChartReferenceHandler(chartRefService *service.ChartReferenceService) *ChartReferenceHandler {
	return &ChartReferenceHandler{
		chartRefService: chartRefService,
	}
}

// CreateChartReference 创建 Chart 引用
// @Summary 创建 Chart 引用
// @Description 新增 Chart 引用配置
// @Tags Chart References
// @Accept json
// @Produce json
// @Security BearerAuth
// @Param request body dto.CreateChartReferenceRequest true "Chart 引用信息"
// @Success 201 {object} dto.ChartReferenceResponse
// @Failure 400 {object} dto.ErrorResponse
// @Router /chart-references [post]
func (h *ChartReferenceHandler) CreateChartReference(w http.ResponseWriter, r *http.Request) {
	var req dto.CreateChartReferenceRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		respondError(w, http.StatusBadRequest, "Invalid request body", err.Error())
		return
	}

	// 获取用户信息
	workspaceID := r.Header.Get("X-Workspace-ID")

	chartRef, err := h.chartRefService.Create(
		r.Context(),
		workspaceID,
		req.RegistryID,
		req.Repository,
		req.ChartName,
		req.Description,
	)
	if err != nil {
		respondError(w, http.StatusBadRequest, "Failed to create chart reference", err.Error())
		return
	}

	response := toChartReferenceResponse(chartRef)
	respondJSON(w, http.StatusCreated, response)
}

// GetChartReference 获取 Chart 引用详情
// @Summary 获取 Chart 引用
// @Tags Chart References
// @Produce json
// @Security BearerAuth
// @Param chart_reference_id path string true "Chart Reference ID"
// @Success 200 {object} dto.ChartReferenceResponse
// @Failure 404 {object} dto.ErrorResponse
// @Router /chart-references/{chart_reference_id} [get]
func (h *ChartReferenceHandler) GetChartReference(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	chartRefID := vars["chart_reference_id"]

	chartRef, err := h.chartRefService.GetByID(r.Context(), chartRefID)
	if err != nil {
		respondError(w, http.StatusNotFound, "Chart reference not found", err.Error())
		return
	}

	response := toChartReferenceResponse(chartRef)
	respondJSON(w, http.StatusOK, response)
}

// GetAllChartReferences 获取所有 Chart 引用
// @Summary 列出所有 Chart 引用
// @Tags Chart References
// @Produce json
// @Security BearerAuth
// @Success 200 {array} dto.ChartReferenceResponse
// @Failure 500 {object} dto.ErrorResponse
// @Router /chart-references [get]
func (h *ChartReferenceHandler) GetAllChartReferences(w http.ResponseWriter, r *http.Request) {
	workspaceID := r.Header.Get("X-Workspace-ID")
	role := r.Header.Get("X-User-Role")

	var chartRefs []*dto.ChartReferenceResponse

	// Admin 可以看到所有，其他用户只看自己 workspace
	if role == "admin" {
		allChartRefs, err := h.chartRefService.List(r.Context())
		if err != nil {
			respondError(w, http.StatusInternalServerError, "Failed to list chart references", err.Error())
			return
		}
		for _, cr := range allChartRefs {
			chartRefs = append(chartRefs, toChartReferenceResponse(cr))
		}
	} else if workspaceID != "" {
		workspaceChartRefs, err := h.chartRefService.GetByWorkspace(r.Context(), workspaceID)
		if err != nil {
			respondError(w, http.StatusInternalServerError, "Failed to list chart references", err.Error())
			return
		}
		for _, cr := range workspaceChartRefs {
			chartRefs = append(chartRefs, toChartReferenceResponse(cr))
		}
	}

	respondJSON(w, http.StatusOK, chartRefs)
}

// UpdateChartReference 更新 Chart 引用
// @Summary 更新 Chart 引用
// @Tags Chart References
// @Accept json
// @Produce json
// @Security BearerAuth
// @Param chart_reference_id path string true "Chart Reference ID"
// @Param request body dto.UpdateChartReferenceRequest true "更新内容"
// @Success 200 {object} dto.ChartReferenceResponse
// @Failure 404 {object} dto.ErrorResponse
// @Router /chart-references/{chart_reference_id} [put]
func (h *ChartReferenceHandler) UpdateChartReference(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	chartRefID := vars["chart_reference_id"]

	var req dto.UpdateChartReferenceRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		respondError(w, http.StatusBadRequest, "Invalid request body", err.Error())
		return
	}

	isEnabled := true
	if req.IsEnabled != nil {
		isEnabled = *req.IsEnabled
	}

	chartRef, err := h.chartRefService.Update(
		r.Context(),
		chartRefID,
		req.RegistryID,
		req.Repository,
		req.ChartName,
		req.Description,
		isEnabled,
	)
	if err != nil {
		respondError(w, http.StatusBadRequest, "Failed to update chart reference", err.Error())
		return
	}

	response := toChartReferenceResponse(chartRef)
	respondJSON(w, http.StatusOK, response)
}

// DeleteChartReference 删除 Chart 引用
// @Summary 删除 Chart 引用
// @Tags Chart References
// @Produce json
// @Security BearerAuth
// @Param chart_reference_id path string true "Chart Reference ID"
// @Success 204 {string} string "No Content"
// @Failure 404 {object} dto.ErrorResponse
// @Router /chart-references/{chart_reference_id} [delete]
func (h *ChartReferenceHandler) DeleteChartReference(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	chartRefID := vars["chart_reference_id"]

	if err := h.chartRefService.Delete(r.Context(), chartRefID); err != nil {
		respondError(w, http.StatusNotFound, "Failed to delete chart reference", err.Error())
		return
	}

	w.WriteHeader(http.StatusNoContent)
}

// GetChartReferencesByRegistry 获取 Registry 的所有 Chart 引用
// @Summary 获取 Registry 的 Chart 引用
// @Tags Chart References
// @Produce json
// @Security BearerAuth
// @Param registry_id path string true "Registry ID"
// @Success 200 {array} dto.ChartReferenceResponse
// @Failure 500 {object} dto.ErrorResponse
// @Router /registries/{registry_id}/chart-references [get]
func (h *ChartReferenceHandler) GetChartReferencesByRegistry(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	registryID := vars["registry_id"]

	chartRefs, err := h.chartRefService.GetByRegistry(r.Context(), registryID)
	if err != nil {
		respondError(w, http.StatusInternalServerError, "Failed to list chart references", err.Error())
		return
	}

	responses := make([]*dto.ChartReferenceResponse, 0, len(chartRefs))
	for _, cr := range chartRefs {
		responses = append(responses, toChartReferenceResponse(cr))
	}

	respondJSON(w, http.StatusOK, responses)
}

// toChartReferenceResponse 转换为响应 DTO
func toChartReferenceResponse(chartRef *entity.ChartReference) *dto.ChartReferenceResponse {
	return &dto.ChartReferenceResponse{
		ID:          chartRef.ID,
		WorkspaceID: chartRef.WorkspaceID,
		RegistryID:  chartRef.RegistryID,
		Repository:  chartRef.Repository,
		ChartName:   chartRef.ChartName,
		Description: chartRef.Description,
		IsEnabled:   chartRef.IsEnabled,
		CreatedAt:   chartRef.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
		UpdatedAt:   chartRef.UpdatedAt.Format("2006-01-02T15:04:05Z07:00"),
	}
}