/**
 * 결재 시스템 API 클라이언트
 * 엔드포인트: /api/approval/*
 */

import apiClient from "@/lib/api/client";

// ============================================================
// 공통 타입 정의
// ============================================================

export interface ApiResponse<T = any> {
  success: boolean;
  data?: T;
  message?: string;
  error?: string;
  total?: number;
  page?: number;
  limit?: number;
}

export interface ApprovalDefinition {
  definition_id: number;
  definition_name: string;
  definition_name_eng?: string;
  description?: string;
  default_template_id?: number;
  max_steps: number;
  allow_self_approval: boolean;
  allow_cancel: boolean;
  is_active: string;
  company_code: string;
  created_by?: string;
  created_at: string;
  updated_by?: string;
  updated_at: string;
}

export interface ApprovalLineTemplate {
  template_id: number;
  template_name: string;
  description?: string;
  definition_id?: number;
  definition_name?: string;
  is_active: string;
  company_code: string;
  created_by?: string;
  created_at: string;
  updated_by?: string;
  updated_at: string;
  steps?: ApprovalLineTemplateStep[];
}

export interface ApprovalLineTemplateStep {
  step_id: number;
  template_id: number;
  step_order: number;
  step_type?: "approval" | "consensus" | "notification";
  approver_type: "user" | "position" | "dept";
  approver_user_id?: string;
  approver_position?: string;
  approver_dept_code?: string;
  approver_label?: string;
  company_code: string;
}

export interface ApprovalProxySetting {
  id: number;
  original_user_id: string;
  original_user_name?: string;
  original_dept_name?: string;
  proxy_user_id: string;
  proxy_user_name?: string;
  proxy_dept_name?: string;
  start_date: string;
  end_date: string;
  reason?: string;
  is_active: string;
  company_code: string;
  created_at: string;
  updated_at: string;
}

export interface ApprovalRequest {
  request_id: number;
  title: string;
  description?: string;
  definition_id?: number;
  definition_name?: string;
  target_table: string;
  target_record_id: string;
  target_record_data?: Record<string, any>;
  status: "requested" | "in_progress" | "approved" | "rejected" | "cancelled";
  current_step: number;
  total_steps: number;
  requester_id: string;
  requester_name?: string;
  requester_dept?: string;
  completed_at?: string;
  final_approver_id?: string;
  final_comment?: string;
  screen_id?: number;
  button_component_id?: string;
  company_code: string;
  created_at: string;
  updated_at: string;
  lines?: ApprovalLine[];
}

export interface ApprovalLine {
  line_id: number;
  request_id: number;
  step_order: number;
  approver_id: string;
  approver_name?: string;
  approver_position?: string;
  approver_dept?: string;
  approver_label?: string;
  status: "waiting" | "pending" | "approved" | "rejected" | "skipped";
  comment?: string;
  processed_at?: string;
  company_code: string;
  created_at: string;
  // 요청 정보 (my-pending 조회 시 포함)
  title?: string;
  target_table?: string;
  target_record_id?: string;
  requester_name?: string;
  requester_dept?: string;
  request_created_at?: string;
}

export interface CreateApprovalRequestInput {
  title: string;
  description?: string;
  definition_id?: number;
  target_table: string;
  target_record_id?: string;
  target_record_data?: Record<string, any>;
  screen_id?: number;
  button_component_id?: string;
  approval_mode?: "sequential" | "parallel";
  approval_type?: "self" | "escalation" | "consensus" | "post";
  approvers: {
    approver_id: string;
    approver_name?: string;
    approver_position?: string;
    approver_dept?: string;
    approver_label?: string;
    step_type?: "approval" | "consensus" | "notification";
    step_order?: number;
  }[];
}

// ============================================================
// 결재 유형 (Definitions) API
// ============================================================

export async function getApprovalDefinitions(params?: {
  is_active?: string;
  search?: string;
}): Promise<ApiResponse<ApprovalDefinition[]>> {
  try {
    const response = await apiClient.get("/approval/definitions", { params });
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function getApprovalDefinition(id: number): Promise<ApiResponse<ApprovalDefinition>> {
  try {
    const response = await apiClient.get(`/approval/definitions/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function createApprovalDefinition(data: {
  definition_name: string;
  definition_name_eng?: string;
  description?: string;
  default_template_id?: number;
  max_steps?: number;
  allow_self_approval?: boolean;
  allow_cancel?: boolean;
  is_active?: string;
}): Promise<ApiResponse<ApprovalDefinition>> {
  try {
    const response = await apiClient.post("/approval/definitions", data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function updateApprovalDefinition(
  id: number,
  data: Partial<ApprovalDefinition>
): Promise<ApiResponse<ApprovalDefinition>> {
  try {
    const response = await apiClient.put(`/approval/definitions/${id}`, data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function deleteApprovalDefinition(id: number): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.delete(`/approval/definitions/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 결재선 템플릿 (Templates) API
// ============================================================

export async function getApprovalTemplates(params?: {
  definition_id?: number;
  is_active?: string;
}): Promise<ApiResponse<ApprovalLineTemplate[]>> {
  try {
    const response = await apiClient.get("/approval/templates", { params });
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function getApprovalTemplate(id: number): Promise<ApiResponse<ApprovalLineTemplate>> {
  try {
    const response = await apiClient.get(`/approval/templates/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function createApprovalTemplate(data: {
  template_name: string;
  description?: string;
  definition_id?: number;
  is_active?: string;
  steps?: Omit<ApprovalLineTemplateStep, "step_id" | "template_id" | "company_code">[];
}): Promise<ApiResponse<ApprovalLineTemplate>> {
  try {
    const response = await apiClient.post("/approval/templates", data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function updateApprovalTemplate(
  id: number,
  data: {
    template_name?: string;
    description?: string;
    definition_id?: number;
    is_active?: string;
    steps?: Omit<ApprovalLineTemplateStep, "step_id" | "template_id" | "company_code">[];
  }
): Promise<ApiResponse<ApprovalLineTemplate>> {
  try {
    const response = await apiClient.put(`/approval/templates/${id}`, data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function deleteApprovalTemplate(id: number): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.delete(`/approval/templates/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 결재 요청 (Requests) API
// ============================================================

export async function getApprovalRequests(params?: {
  status?: string;
  target_table?: string;
  target_record_id?: string;
  requester_id?: string;
  my_approvals?: boolean;
  page?: number;
  limit?: number;
}): Promise<ApiResponse<ApprovalRequest[]>> {
  try {
    const response = await apiClient.get("/approval/requests", { params });
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function getApprovalRequest(id: number): Promise<ApiResponse<ApprovalRequest>> {
  try {
    const response = await apiClient.get(`/approval/requests/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function createApprovalRequest(
  data: CreateApprovalRequestInput
): Promise<ApiResponse<ApprovalRequest>> {
  try {
    const response = await apiClient.post("/approval/requests", data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function cancelApprovalRequest(id: number): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.post(`/approval/requests/${id}/cancel`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 결재 라인 처리 (Lines) API
// ============================================================

export async function getMyPendingApprovals(): Promise<ApiResponse<ApprovalLine[]>> {
  try {
    const response = await apiClient.get("/approval/my-pending");
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function processApprovalLine(
  lineId: number,
  data: { action: "approved" | "rejected"; comment?: string }
): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.post(`/approval/lines/${lineId}/process`, data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 대결 위임 설정 (Proxy Settings) API
// ============================================================

export async function getProxySettings(): Promise<ApiResponse<ApprovalProxySetting[]>> {
  try {
    const response = await apiClient.get("/approval/proxy-settings");
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function createProxySetting(data: {
  original_user_id: string;
  proxy_user_id: string;
  start_date: string;
  end_date: string;
  reason?: string;
}): Promise<ApiResponse<ApprovalProxySetting>> {
  try {
    const response = await apiClient.post("/approval/proxy-settings", data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function updateProxySetting(
  id: number,
  data: {
    proxy_user_id?: string;
    start_date?: string;
    end_date?: string;
    reason?: string;
    is_active?: string;
  }
): Promise<ApiResponse<ApprovalProxySetting>> {
  try {
    const response = await apiClient.put(`/approval/proxy-settings/${id}`, data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function deleteProxySetting(id: number): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.delete(`/approval/proxy-settings/${id}`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function checkActiveProxy(
  userId: string
): Promise<ApiResponse<{ proxy_user_id: string; proxy_user_name?: string } | null>> {
  try {
    const response = await apiClient.get(
      `/approval/proxy-settings/check/${encodeURIComponent(userId)}`
    );
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 후결 승인 API
// ============================================================

export async function postApproveRequest(requestId: number): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.post(`/approval/requests/${requestId}/post-approve`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

// ============================================================
// 결재선 템플릿 단계 (Template Steps) API
// ============================================================

export async function getTemplateSteps(
  templateId: number
): Promise<ApiResponse<ApprovalLineTemplateStep[]>> {
  try {
    const response = await apiClient.get(`/approval/templates/${templateId}/steps`);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function createTemplateStep(
  templateId: number,
  data: Omit<ApprovalLineTemplateStep, "step_id" | "template_id" | "company_code">
): Promise<ApiResponse<ApprovalLineTemplateStep>> {
  try {
    const response = await apiClient.post(`/approval/templates/${templateId}/steps`, data);
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function updateTemplateStep(
  templateId: number,
  stepId: number,
  data: Partial<Omit<ApprovalLineTemplateStep, "step_id" | "template_id" | "company_code">>
): Promise<ApiResponse<ApprovalLineTemplateStep>> {
  try {
    const response = await apiClient.put(
      `/approval/templates/${templateId}/steps/${stepId}`,
      data
    );
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}

export async function deleteTemplateStep(
  templateId: number,
  stepId: number
): Promise<ApiResponse<void>> {
  try {
    const response = await apiClient.delete(
      `/approval/templates/${templateId}/steps/${stepId}`
    );
    return response.data;
  } catch (error: any) {
    return { success: false, error: error.message };
  }
}