package interfaces

import (
	"net/http"

	"mengstack/internal/kernel/response"
	"mengstack/internal/modules/settings/application"
	"mengstack/internal/modules/settings/domain"

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

type Handler struct {
	svc *application.Service
}

func NewHandler(svc *application.Service) *Handler {
	return &Handler{svc: svc}
}

// GetGlobalSetting godoc
// @Summary      获取全局配置
// @Description  根据 key 获取全局（非租户）配置项
// @Tags         Settings
// @Produce      json
// @Param        key  path      string  true  "配置键名"
// @Success      200  {object}  response.Response{data=domain.SettingDTO}
// @Failure      400  {object}  response.Response
// @Failure      404  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/global/{key} [get]
func (h *Handler) GetGlobalSetting(c *gin.Context) {
	key := c.Param("key")
	setting, err := h.svc.GetGlobalSetting(c.Request.Context(), key)
	if err != nil {
		response.HandleError(c, err)
		return
	}
	if setting == nil {
		response.Fail(c, response.NewBadRequest("setting not found"))
		return
	}
	response.Success(c, setting)
}

// UpdateGlobalSetting godoc
// @Summary      更新全局配置
// @Description  创建或更新全局配置项
// @Tags         Settings
// @Accept       json
// @Produce      json
// @Param        key      path      string                      true  "配置键名"
// @Param        request  body      domain.UpdateSettingRequest  true  "配置值"
// @Success      200      {object}  response.Response
// @Failure      400      {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/global/{key} [put]
func (h *Handler) UpdateGlobalSetting(c *gin.Context) {
	key := c.Param("key")
	var req domain.UpdateSettingRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request: "+err.Error()))
		return
	}
	userID := c.GetUint("user_id")
	if err := h.svc.UpdateGlobalSetting(c.Request.Context(), key, &req, userID); err != nil {
		response.HandleError(c, err)
		return
	}
	response.Success(c, nil)
}

// ListGlobalSettings godoc
// @Summary      列出全局配置
// @Description  获取所有全局配置项
// @Tags         Settings
// @Produce      json
// @Success      200  {object}  response.Response{data=[]domain.SettingDTO}
// @Failure      500  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings [get]
func (h *Handler) ListGlobalSettings(c *gin.Context) {
	settings, err := h.svc.ListGlobalSettings(c.Request.Context())
	if err != nil {
		response.HandleError(c, err)
		return
	}
	response.Success(c, settings)
}

// GetTenantSetting godoc
// @Summary      获取租户配置
// @Description  根据 key 获取当前租户的配置项
// @Tags         Settings
// @Produce      json
// @Param        key  path      string  true  "配置键名"
// @Success      200  {object}  response.Response{data=domain.SettingDTO}
// @Failure      400  {object}  response.Response
// @Failure      404  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/tenant/{key} [get]
func (h *Handler) GetTenantSetting(c *gin.Context) {
	key := c.Param("key")
	tenantID := c.GetString("tenant_id")
	setting, err := h.svc.GetTenantSetting(c.Request.Context(), tenantID, key)
	if err != nil {
		response.HandleError(c, err)
		return
	}
	if setting == nil {
		response.Fail(c, response.NewBadRequest("setting not found"))
		return
	}
	response.Success(c, setting)
}

// UpdateTenantSetting godoc
// @Summary      更新租户配置
// @Description  创建或更新当前租户的配置项
// @Tags         Settings
// @Accept       json
// @Produce      json
// @Param        key      path      string                      true  "配置键名"
// @Param        request  body      domain.UpdateSettingRequest  true  "配置值"
// @Success      200      {object}  response.Response
// @Failure      400      {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/tenant/{key} [put]
func (h *Handler) UpdateTenantSetting(c *gin.Context) {
	key := c.Param("key")
	tenantID := c.GetString("tenant_id")
	var req domain.UpdateSettingRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, response.NewBadRequest("invalid request: "+err.Error()))
		return
	}
	userID := c.GetUint("user_id")
	if err := h.svc.UpdateTenantSetting(c.Request.Context(), tenantID, key, &req, userID); err != nil {
		response.HandleError(c, err)
		return
	}
	response.Success(c, nil)
}

// ListTenantSettings godoc
// @Summary      列出租户配置
// @Description  获取当前租户的所有配置项
// @Tags         Settings
// @Produce      json
// @Success      200  {object}  response.Response{data=[]domain.SettingDTO}
// @Failure      500  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/tenant [get]
func (h *Handler) ListTenantSettings(c *gin.Context) {
	tenantID := c.GetString("tenant_id")
	settings, err := h.svc.ListTenantSettings(c.Request.Context(), tenantID)
	if err != nil {
		response.HandleError(c, err)
		return
	}
	response.Success(c, settings)
}

// DeleteTenantSetting godoc
// @Summary      删除租户配置
// @Description  删除当前租户的指定配置项
// @Tags         Settings
// @Param        key  path      string  true  "配置键名"
// @Success      200  {object}  response.Response
// @Failure      400  {object}  response.Response
// @Failure      404  {object}  response.Response
// @Security     Bearer
// @Security     TenantID
// @Router       /api/v1/settings/tenant/{key} [delete]
func (h *Handler) DeleteTenantSetting(c *gin.Context) {
	key := c.Param("key")
	tenantID := c.GetString("tenant_id")
	if err := h.svc.DeleteTenantSetting(c.Request.Context(), tenantID, key); err != nil {
		response.HandleError(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "deleted"})
}