import { computed } from "vue";
import { useAuthStore } from "../store/auth";
import { useStudyStore } from "../store/study";
import { TEXT } from "../locales";
import { getProjectRole, isSystemAdmin } from "./roles";
import { isApiPermissionAllowed } from "./apiPermissionValue";

const PERMISSIONS: Record<string, string[]> = {
  "subject.create": ["ADMIN"],
  "subject.enroll": ["ADMIN"],
  "subject.complete": ["ADMIN"],
  "subject.drop": ["ADMIN"],
  "subject.delete": ["ADMIN"],
  "ae.create": ["ADMIN"],
  "ae.close": ["ADMIN"],
  "faq.edit": ["ADMIN"],
  "faq.update": ["ADMIN"],
  "faq.delete": ["ADMIN"],
  "faq.create": ["ADMIN"],
  "faq.reply": ["ADMIN"],
  "faq.reply.delete": ["ADMIN"],
  "faq.category.read": ["ADMIN"],
  "faq.category.create": ["ADMIN"],
  "faq.category.update": ["ADMIN"],
  "faq.category.delete": ["ADMIN"],
  "precautions.create": ["ADMIN"],
  "precautions.update": ["ADMIN"],
  "precautions.delete": ["ADMIN"],
  "startup.initiation.create": ["ADMIN"],
  "startup.initiation.update": ["ADMIN"],
  "startup.initiation.delete": ["ADMIN"],
  "startup.ethics.create": ["ADMIN"],
  "startup.ethics.update": ["ADMIN"],
  "startup.ethics.delete": ["ADMIN"],
  "startup.auth.create": ["ADMIN"],
  "startup.auth.update": ["ADMIN"],
  "startup.auth.delete": ["ADMIN"],
  "project.milestones.update": ["ADMIN"],
  "project.members.list": ["ADMIN"],
  "project.members.candidates": ["ADMIN"],
  "project.members.create": ["ADMIN"],
  "project.members.update": ["ADMIN"],
  "project.members.delete": ["ADMIN"],
  "site.manage": ["ADMIN"],
  "site.cra.bind": ["ADMIN"],
  "fees.contract.create": ["ADMIN"],
  "fees.contract.update": ["ADMIN"],
  "fees.contract.delete": ["ADMIN"],
  "documents.read": ["ADMIN"],
  "documents.create": ["ADMIN"],
  "documents.update": ["ADMIN"],
  "documents.delete": ["ADMIN"],
};

const REASONS: Record<string, string> = {
  "subject.enroll": TEXT.modules.permissions.subjectEnroll,
  "subject.complete": TEXT.modules.permissions.subjectComplete,
  "subject.drop": TEXT.modules.permissions.subjectDrop,
  "ae.close": TEXT.modules.permissions.aeClose,
  "faq.edit": TEXT.modules.permissions.faqEdit,
  "faq.update": TEXT.modules.permissions.faqEdit,
  "faq.delete": TEXT.modules.permissions.faqEdit,
  "faq.create": TEXT.modules.permissions.faqCreate,
  "faq.reply": TEXT.modules.permissions.faqReply,
  "faq.reply.delete": TEXT.modules.permissions.faqReply,
  "faq.category.read": TEXT.modules.permissions.default,
  "faq.category.create": TEXT.modules.permissions.faqEdit,
  "faq.category.update": TEXT.modules.permissions.faqEdit,
  "faq.category.delete": TEXT.modules.permissions.faqEdit,
  "precautions.create": TEXT.modules.permissions.default,
  "precautions.update": TEXT.modules.permissions.default,
  "precautions.delete": TEXT.modules.permissions.default,
  "startup.initiation.create": TEXT.modules.permissions.default,
  "startup.initiation.update": TEXT.modules.permissions.default,
  "startup.initiation.delete": TEXT.modules.permissions.default,
  "startup.ethics.create": TEXT.modules.permissions.default,
  "startup.ethics.update": TEXT.modules.permissions.default,
  "startup.ethics.delete": TEXT.modules.permissions.default,
  "startup.auth.create": TEXT.modules.permissions.default,
  "startup.auth.update": TEXT.modules.permissions.default,
  "startup.auth.delete": TEXT.modules.permissions.default,
  "project.milestones.update": TEXT.modules.permissions.default,
  "project.members.list": TEXT.modules.permissions.projectMembersManage,
  "project.members.candidates": TEXT.modules.permissions.projectMembersManage,
  "project.members.create": TEXT.modules.permissions.projectMembersManage,
  "project.members.update": TEXT.modules.permissions.projectMembersManage,
  "project.members.delete": TEXT.modules.permissions.projectMembersManage,
  "site.manage": TEXT.modules.permissions.siteManage,
  "site.cra.bind": TEXT.modules.permissions.siteCraBind,
  "fees.contract.create": TEXT.modules.permissions.feeContractsWrite,
  "fees.contract.update": TEXT.modules.permissions.feeContractsWrite,
  "fees.contract.delete": TEXT.modules.permissions.feeContractsWrite,
  "documents.read": TEXT.modules.permissions.default,
  "documents.create": TEXT.modules.permissions.default,
  "documents.update": TEXT.modules.permissions.default,
  "documents.delete": TEXT.modules.permissions.default,
};

export const usePermission = () => {
  const auth = useAuthStore();
  const study = useStudyStore();

  const systemAdmin = computed(() => isSystemAdmin(auth.user));
  const projectRole = computed(() => getProjectRole(study.currentStudy, study.currentStudyRole));
  const projectPermissions = computed(() => study.currentPermissions);

  const can = (action: string): boolean => {
    if (systemAdmin.value) return true;
    if (!projectRole.value) return false;
    const permissionMap: Record<string, string> = {
      "subject.create": "subjects:create",
      "subject.enroll": "subjects:update",
      "subject.complete": "subjects:update",
      "subject.drop": "subjects:update",
      "subject.delete": "subjects:delete",
      "ae.create": "subject_aes:create",
      "ae.close": "subject_aes:update",
      "project.overview.read": "project_overview:read",
      "faq.edit": "faq:update",
      "faq.update": "faq:update",
      "faq.delete": "faq:delete",
      "faq.create": "faq:create",
      "faq.reply": "faq_reply:create",
      "faq.reply.delete": "faq_reply:delete",
      "faq.category.read": "faq_category:read",
      "faq.category.create": "faq_category:create",
      "faq.category.update": "faq_category:update",
      "faq.category.delete": "faq_category:delete",
      "precautions.read": "precautions:read",
      "precautions.create": "precautions:create",
      "precautions.update": "precautions:update",
      "precautions.delete": "precautions:delete",
      "startup.initiation.create": "startup_initiation:create",
      "startup.initiation.update": "startup_initiation:update",
      "startup.initiation.delete": "startup_initiation:delete",
      "startup.ethics.create": "startup_ethics:create",
      "startup.ethics.update": "startup_ethics:update",
      "startup.ethics.delete": "startup_ethics:delete",
      "startup.auth.create": "startup_auth:create",
      "startup.auth.update": "startup_auth:update",
      "startup.auth.delete": "startup_auth:delete",
      "project.milestones.update": "project_milestones:update",
      "project.members.list": "project_members:read",
      "project.members.candidates": "project_members:read",
      "project.members.create": "project_members:create",
      "project.members.update": "project_members:update",
      "project.members.delete": "project_members:delete",
      "site.manage": "sites:update",
      "site.cra.bind": "sites:update",
      "fees.contract.create": "fees_contracts:create",
      "fees.contract.update": "fees_contracts:update",
      "fees.contract.delete": "fees_contracts:delete",
      "documents.read": "documents:read",
      "documents.create": "documents:create",
      "documents.update": "documents:update",
      "documents.delete": "documents:delete",
      "audit.export.read": "audit_logs:read",
    };
    const operationKey = permissionMap[action];
    if (!operationKey) return false;
    return isApiPermissionAllowed(projectPermissions.value?.[projectRole.value]?.[operationKey]);
  };

  const reason = (action: string): string => {
    if (systemAdmin.value) return "";
    return REASONS[action] || TEXT.modules.permissions.default;
  };

  return {
    can,
    reason,
  };
};