import { apiRequestData } from "./http";
import type { EmployeeDepartmentSummary, EmployeeStatus } from "./employees";

export type PerformanceReviewCycleType = "monthly" | "quarterly" | "semi_annual" | "annual";
export type PerformanceReviewCycleStatus = "draft" | "active" | "completed";
export type PerformanceReviewDimensionType =
  | "work_quality"
  | "work_efficiency"
  | "teamwork"
  | "initiative"
  | "professional_skill";

export type PerformanceEmployeeSummary = {
  id: string;
  employeeNo: string;
  name: string;
  title: string;
  status: EmployeeStatus;
  avatarUrl: string | null;
  department: EmployeeDepartmentSummary | null;
};

export type PerformanceReviewCycle = {
  id: string;
  name: string;
  cycleType: PerformanceReviewCycleType;
  status: PerformanceReviewCycleStatus;
  startDate: string | null;
  endDate: string | null;
  activatedAt: string | null;
  completedAt: string | null;
  createdAt: string | null;
  createdBy: string | null;
  updatedAt: string | null;
  updatedBy: string | null;
};

export type PerformanceReviewDimension = {
  dimensionType: PerformanceReviewDimensionType;
  score: number;
};

export type PerformanceReview = {
  id: string;
  cycleId: string;
  employeeId: string;
  reviewerEmployeeId: string;
  overallScore: number;
  comment: string | null;
  reviewer: {
    id: string;
    employeeNo: string;
    name: string;
  } | null;
  dimensions: PerformanceReviewDimension[];
  createdAt: string | null;
  createdBy: string | null;
  updatedAt: string | null;
  updatedBy: string | null;
};

export type PerformanceCycleOverview = {
  cycle: PerformanceReviewCycle;
  items: Array<{
    employee: PerformanceEmployeeSummary;
    review: PerformanceReview | null;
  }>;
};

export type PerformanceEmployeeReviewTimeline = {
  employee: PerformanceEmployeeSummary;
  viewerRole: "self" | "manager" | "admin";
  items: Array<{
    cycle: PerformanceReviewCycle;
    review: PerformanceReview | null;
    canEdit: boolean;
  }>;
};

export type CreatePerformanceCyclePayload = {
  name: string;
  cycleType: PerformanceReviewCycleType;
  startDate: string;
  endDate: string;
};

export type PatchPerformanceCyclePayload = Partial<CreatePerformanceCyclePayload> & {
  status?: PerformanceReviewCycleStatus;
};

export type UpsertPerformanceReviewPayload = {
  overallScore: number;
  comment?: string | null;
  dimensions?: PerformanceReviewDimension[];
};

export async function fetchPerformanceCycles() {
  return apiRequestData<{ items: PerformanceReviewCycle[] }>("/api/performance/cycles");
}

export async function createPerformanceCycle(payload: CreatePerformanceCyclePayload) {
  return apiRequestData<PerformanceReviewCycle>("/api/performance/cycles", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}

export async function patchPerformanceCycle(cycleId: string, payload: PatchPerformanceCyclePayload) {
  return apiRequestData<PerformanceReviewCycle>(`/api/performance/cycles/${cycleId}`, {
    method: "PATCH",
    body: JSON.stringify(payload),
  });
}

export async function fetchPerformanceCycleOverview(cycleId: string) {
  return apiRequestData<PerformanceCycleOverview>(`/api/performance/cycles/${cycleId}/reviews`);
}

export async function fetchEmployeePerformanceTimeline(employeeId: string) {
  return apiRequestData<PerformanceEmployeeReviewTimeline>(`/api/performance/employees/${employeeId}/reviews`);
}

export async function upsertPerformanceReview(cycleId: string, employeeId: string, payload: UpsertPerformanceReviewPayload) {
  return apiRequestData<PerformanceReview>(`/api/performance/cycles/${cycleId}/reviews/${employeeId}`, {
    method: "PUT",
    body: JSON.stringify(payload),
  });
}