import { financeApi } from "@/auth/http";
import type { LocalizedName } from "@/shared/types";

export type CostCenter = {
  id: string;
  code: string;
  name: LocalizedName;
  parentId: string | null;
  unitId: string | null;
  unitName: LocalizedName | null;
  managerEmployeeId: string | null;
  managerName: string | null;
  isGroup: boolean;
  isActive: boolean;
};

export type CostCenterNode = {
  id: string;
  code: string;
  name: LocalizedName;
  parentId: string | null;
  isGroup: boolean;
  isActive: boolean;
  children: CostCenterNode[];
};

export type Budget = {
  id: string;
  fiscalYearId: string;
  name: string;
  status: "DRAFT" | "APPROVED" | "CLOSED";
  description: string | null;
  approvedBy: string | null;
  approvedAt: string | null;
};

export type BudgetLine = {
  id: string;
  accountId: string;
  accountCode: string;
  accountName: LocalizedName;
  costCenterId: string | null;
  costCenterCode: string | null;
  costCenterName: LocalizedName | null;
  fiscalPeriodId: string;
  periodNumber: number;
  periodName: LocalizedName;
  amount: number | string;
  note: string | null;
};

export type BudgetDetail = Budget & { lines: BudgetLine[] };

export type VarianceRow = {
  accountId: string;
  accountCode: string;
  accountName: LocalizedName;
  accountType: string;
  costCenterId: string | null;
  costCenterCode: string | null;
  costCenterName: LocalizedName | null;
  budget: number;
  actual: number;
  committed: number;
  variance: number;
  remaining: number;
  percentUsed: number | null;
  isOverBudget: boolean;
  isUnbudgeted: boolean;
};

export const BUDGET_STATUS_COLOR: Record<string, string> = {
  DRAFT: "gray",
  APPROVED: "green",
  CLOSED: "blue",
};

export const fetchCostCenters = async (): Promise<CostCenter[]> => {
  const { data } = await financeApi.get("/budgeting/cost-centers");
  return data;
};

export const fetchCostCenterTree = async (
  search?: string,
): Promise<CostCenterNode[]> => {
  const { data } = await financeApi.get("/budgeting/cost-centers/tree", {
    params: search ? { search } : undefined,
  });
  return data;
};

export const fetchUnlinkedUnits = async (): Promise<
  { id: string; name: LocalizedName }[]
> => {
  const { data } = await financeApi.get("/budgeting/cost-centers/unlinked-units");
  return data;
};

export const createCostCenter = async (payload: {
  code: string;
  name: { en: string; am: string };
  parentId?: string;
  unitId?: string;
  isGroup?: boolean;
}): Promise<CostCenter> => {
  const { data } = await financeApi.post("/budgeting/cost-centers", payload);
  return data;
};

export const deleteCostCenter = async (id: string): Promise<void> => {
  await financeApi.delete(`/budgeting/cost-centers/${id}`);
};

export const fetchBudgets = async (): Promise<Budget[]> => {
  const { data } = await financeApi.get("/budgeting/budgets");
  return data;
};

export const fetchBudget = async (id: string): Promise<BudgetDetail> => {
  const { data } = await financeApi.get(`/budgeting/budgets/${id}`);
  return data;
};

export const createBudget = async (payload: {
  fiscalYearId: string;
  name: string;
  description?: string;
}): Promise<Budget> => {
  const { data } = await financeApi.post("/budgeting/budgets", payload);
  return data;
};

export const spreadBudget = async (
  id: string,
  entries: {
    accountId: string;
    costCenterId?: string;
    annualAmount: number;
    note?: string;
  }[],
): Promise<BudgetDetail> => {
  const { data } = await financeApi.post(`/budgeting/budgets/${id}/spread`, {
    entries,
  });
  return data;
};

export const approveBudget = async (id: string): Promise<BudgetDetail> => {
  const { data } = await financeApi.post(`/budgeting/budgets/${id}/approve`);
  return data;
};

export const fetchVariance = async (
  id: string,
  fiscalPeriodId?: string,
): Promise<VarianceRow[]> => {
  const { data } = await financeApi.get(`/budgeting/budgets/${id}/variance`, {
    params: fiscalPeriodId ? { fiscalPeriodId } : undefined,
  });
  return data;
};