import { apiRequestData } from "./http";

export type FeatureFlagKey =
  | "ai_assist"
  | "erp_sync"
  | "invoice_verification"
  | "leave_holiday_calendar"
  | "budget_precheck_v1"
  | "payment_batch_v1"
  | "portal_home_v1"
  | "global_search_v1"
  | "announcements_v1"
  | "workflow_definition_admin_v1"
  | "cutover_console_v1"
  | "presence_board_v1"
  | "attendance_v1"
  | "attendance_unified_v1"
  | "weekly_report_v1"
  | "employee_lifecycle_v1"
  | "hr_wecom_directory_sync_v1"
  | "wecom_hr_master_sync_v1"
  | "todo_board_v1"
  | "wecom_entry_v1"
  | "project_domain_v1"
  | "project_linking_v1"
  | "project_communication_log_v1"
  | "project_closure_checklist_v1"
  | "confidential_doc_refs_v1"
  | "public_security_hardening_v1";

export type FeatureFlagOverrideMode = "inherit" | "force_on" | "force_off";
export type FeatureFlagRolloutType = "global" | "department_allowlist";
export type FeatureFlagSection = "main" | "admin" | "backup";

export type FeatureFlagItem = {
  id: string | null;
  flagKey: FeatureFlagKey;
  overrideMode: FeatureFlagOverrideMode;
  rolloutType: FeatureFlagRolloutType;
  departmentIds: string[];
  note: string;
  version: number;
  createdAt: string | null;
  createdBy: string | null;
  updatedAt: string | null;
  updatedBy: string | null;
  envEnabled: boolean;
  effectiveEnabled: boolean;
  effectiveReason: string;
  matchedDepartmentId: string | null;
  requiresDepartment: boolean;
};

export type FeatureFlagSnapshot = {
  overrideMode: FeatureFlagOverrideMode;
  rolloutType: FeatureFlagRolloutType;
  departmentIds: string[];
  note: string;
  version: number;
};

export type FeatureFlagChangelogItem = {
  id: string;
  actorId: string;
  actorName: string;
  createdAt: string | null;
  from: FeatureFlagSnapshot | null;
  to: FeatureFlagSnapshot | null;
};

export type FeatureFlagImpactNavigationItem = {
  label: string;
  path: string;
  section: FeatureFlagSection;
};

export type FeatureFlagImpactBackendModule = {
  label: string;
  routes: string[];
};

export type FeatureFlagListResponse = {
  items: FeatureFlagItem[];
};

export type FeatureFlagChangelogResponse = {
  page: number;
  pageSize: number;
  total: number;
  items: FeatureFlagChangelogItem[];
};

export type FeatureFlagImpactResponse = {
  flagKey: FeatureFlagKey;
  navigationItems: FeatureFlagImpactNavigationItem[];
  backendModules: FeatureFlagImpactBackendModule[];
};

export type FeatureFlagUpdatePayload = {
  overrideMode: FeatureFlagOverrideMode;
  rolloutType: FeatureFlagRolloutType;
  departmentIds: string[];
  note: string;
  expectedVersion: number;
};

export type FeatureFlagBatchUpdatePayload = {
  items: Array<{
    flagKey: FeatureFlagKey;
    overrideMode: FeatureFlagOverrideMode;
    expectedVersion: number;
  }>;
  note: string;
};

export async function fetchFeatureFlags() {
  return apiRequestData<FeatureFlagListResponse>("/api/system/feature-flags");
}

export async function fetchFeatureFlagChangelog(
  flagKey: FeatureFlagKey,
  params?: { page?: number; pageSize?: number },
) {
  const searchParams = new URLSearchParams();
  if (params?.page) {
    searchParams.set("page", String(params.page));
  }
  if (params?.pageSize) {
    searchParams.set("pageSize", String(params.pageSize));
  }
  const suffix = searchParams.toString() ? `?${searchParams.toString()}` : "";
  return apiRequestData<FeatureFlagChangelogResponse>(
    `/api/system/feature-flags/${flagKey}/changelog${suffix}`,
  );
}

export async function fetchFeatureFlagImpact(flagKey: FeatureFlagKey) {
  return apiRequestData<FeatureFlagImpactResponse>(`/api/system/feature-flags/${flagKey}/impact`);
}

export async function updateFeatureFlag(flagKey: FeatureFlagKey, payload: FeatureFlagUpdatePayload) {
  return apiRequestData<{ item: FeatureFlagItem }>(`/api/system/feature-flags/${flagKey}`, {
    method: "PUT",
    body: JSON.stringify(payload),
  });
}

export async function batchUpdateFeatureFlags(payload: FeatureFlagBatchUpdatePayload) {
  return apiRequestData<{ count: number }>("/api/system/feature-flags/batch", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}