package handler

import (
	"errors"
	"net/http"

	"github.com/gin-gonic/gin"

	"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) registerMembershipPlans(authed *gin.RouterGroup) {
	authed.GET("/membership-plans", middleware.RequireAdminPermission(h.Svc, admin.PermMembershipPlansRead), h.ListMembershipPlans)
	authed.GET("/membership-plans/:code", middleware.RequireAdminPermission(h.Svc, admin.PermMembershipPlansRead), h.GetMembershipPlan)
	authed.PUT("/membership-plans/:code", middleware.RequireAdminPermission(h.Svc, admin.PermMembershipPlansWrite), h.PutMembershipPlan)
}

func (h *AdminHandler) ListMembershipPlans(c *gin.Context) {
	items, err := h.Svc.ListMembershipPlans(c.Request.Context())
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50000, err.Error())
		return
	}
	response.OK(c, gin.H{"items": items})
}

func (h *AdminHandler) GetMembershipPlan(c *gin.Context) {
	plan, err := h.Svc.GetMembershipPlan(c.Request.Context(), c.Param("code"))
	if errors.Is(err, admin.ErrPlanNotFound) {
		response.Fail(c, http.StatusNotFound, 40400, "plan not found")
		return
	}
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50000, err.Error())
		return
	}
	response.OK(c, plan)
}

func (h *AdminHandler) PutMembershipPlan(c *gin.Context) {
	adminID, ok := middleware.AdminIDFromContext(c)
	if !ok {
		response.Fail(c, http.StatusUnauthorized, 40102, "admin session invalid")
		return
	}
	var body struct {
		Title        string `json:"title"`
		DurationDays int    `json:"duration_days"`
		AmountCents  int    `json:"amount_cents"`
		Active       *bool  `json:"active"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.Fail(c, http.StatusBadRequest, 40000, "invalid body")
		return
	}
	active := true
	if body.Active != nil {
		active = *body.Active
	}
	plan, err := h.Svc.UpdateMembershipPlan(
		c.Request.Context(), adminID, c.Param("code"), body.Title, body.DurationDays, body.AmountCents, active,
	)
	if errors.Is(err, admin.ErrPlanNotFound) {
		response.Fail(c, http.StatusNotFound, 40400, "plan not found")
		return
	}
	if errors.Is(err, admin.ErrInvalidPlanU) {
		response.Fail(c, http.StatusBadRequest, 40000, err.Error())
		return
	}
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50000, err.Error())
		return
	}
	response.OK(c, plan)
}