package handler

import (
	"errors"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"

	"github.com/yuxingu/digital-psychology/apps/api/internal/middleware"
	"github.com/yuxingu/digital-psychology/apps/api/internal/service/admin"
	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
)

func (h *AdminHandler) registerFunnelDefinitions(authed *gin.RouterGroup) {
	g := authed.Group("/analytics")
	g.GET("/funnel-definitions", middleware.RequireAdminPermission(h.Svc, admin.PermGrowthRead), h.ListFunnelDefinitions)
	g.GET("/funnel-definitions/:id", middleware.RequireAdminPermission(h.Svc, admin.PermGrowthRead), h.GetFunnelDefinition)
	g.POST("/funnel-definitions", middleware.RequireAdminPermission(h.Svc, admin.PermGrowthWrite), h.CreateFunnelDefinition)
	g.PUT("/funnel-definitions/:id", middleware.RequireAdminPermission(h.Svc, admin.PermGrowthWrite), h.UpdateFunnelDefinition)
}

func (h *AdminHandler) ListFunnelDefinitions(c *gin.Context) {
	items, err := h.Svc.ListFunnelDefinitions(c.Request.Context())
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50050, "list funnel-definition failed")
		return
	}
	response.OK(c, gin.H{"items": items})
}

func (h *AdminHandler) GetFunnelDefinition(c *gin.Context) {
	id, err := uuid.Parse(c.Param("id"))
	if err != nil {
		response.Fail(c, http.StatusBadRequest, 40002, "invalid id")
		return
	}
	row, err := h.Svc.GetFunnelDefinition(c.Request.Context(), id)
	if errors.Is(err, admin.ErrFunnelDefinitionNotFound) {
		response.Fail(c, http.StatusNotFound, 40420, "funnel-definition not found")
		return
	}
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50051, "get funnel-definition failed")
		return
	}
	response.OK(c, row)
}

func (h *AdminHandler) CreateFunnelDefinition(c *gin.Context) {
	adminID, ok := middleware.AdminIDFromContext(c)
	if !ok {
		response.Fail(c, http.StatusUnauthorized, 40101, "admin auth required")
		return
	}
	var body admin.FunnelDefinitionWriteBody
	if err := c.ShouldBindJSON(&body); err != nil {
		response.Fail(c, http.StatusBadRequest, 40054, "invalid body")
		return
	}
	row, err := h.Svc.CreateFunnelDefinition(c.Request.Context(), adminID, body)
	if errors.Is(err, admin.ErrInvalidFunnelDefinition) {
		response.Fail(c, http.StatusBadRequest, 40055, "invalid funnel definition")
		return
	}
	if errors.Is(err, admin.ErrFunnelDefinitionConflict) {
		response.Fail(c, http.StatusConflict, 40912, "funnel definition code conflict")
		return
	}
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50052, "create funnel definition failed")
		return
	}
	response.OK(c, row)
}

func (h *AdminHandler) UpdateFunnelDefinition(c *gin.Context) {
	adminID, ok := middleware.AdminIDFromContext(c)
	if !ok {
		response.Fail(c, http.StatusUnauthorized, 40101, "admin auth required")
		return
	}
	id, err := uuid.Parse(c.Param("id"))
	if err != nil {
		response.Fail(c, http.StatusBadRequest, 40002, "invalid id")
		return
	}
	var body admin.FunnelDefinitionWriteBody
	if err := c.ShouldBindJSON(&body); err != nil {
		response.Fail(c, http.StatusBadRequest, 40054, "invalid body")
		return
	}
	row, err := h.Svc.UpdateFunnelDefinition(c.Request.Context(), adminID, id, body)
	if errors.Is(err, admin.ErrFunnelDefinitionNotFound) {
		response.Fail(c, http.StatusNotFound, 40420, "funnel-definition not found")
		return
	}
	if errors.Is(err, admin.ErrInvalidFunnelDefinition) {
		response.Fail(c, http.StatusBadRequest, 40055, "invalid funnel definition")
		return
	}
	if errors.Is(err, admin.ErrFunnelDefinitionConflict) {
		response.Fail(c, http.StatusConflict, 40912, "funnel definition code conflict")
		return
	}
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50053, "update funnel definition failed")
		return
	}
	response.OK(c, row)
}