const BASE = import.meta.env.DEV ? '/snp-api/api/batch' : '/snp-api/api/batch';

async function fetchJson<T>(url: string): Promise<T> {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`API Error: ${res.status} ${res.statusText}`);
  return res.json();
}

async function postJson<T>(url: string, body?: unknown): Promise<T> {
  const res = await fetch(url, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: body ? JSON.stringify(body) : undefined,
  });
  if (!res.ok) throw new Error(`API Error: ${res.status} ${res.statusText}`);
  return res.json();
}

// ── Dashboard ────────────────────────────────────────────────

export interface DashboardStats {
  totalSchedules: number;
  activeSchedules: number;
  inactiveSchedules: number;
  totalJobs: number;
}

export interface RunningJob {
  jobName: string;
  executionId: number;
  status: string;
  startTime: string;
}

export interface RecentExecution {
  executionId: number;
  jobName: string;
  status: string;
  startTime: string;
  endTime: string | null;
}

export interface RecentFailure {
  executionId: number;
  jobName: string;
  status: string;
  startTime: string;
  endTime: string | null;
  exitMessage: string | null;
}

export interface FailureStats {
  last24h: number;
  last7d: number;
}

export interface DashboardResponse {
  stats: DashboardStats;
  runningJobs: RunningJob[];
  recentExecutions: RecentExecution[];
  recentFailures: RecentFailure[];
  staleExecutionCount: number;
  failureStats: FailureStats;
}

// ── Job Execution ────────────────────────────────────────────

export interface JobExecutionDto {
  executionId: number;
  jobName: string;
  status: string;
  startTime: string;
  endTime: string | null;
  exitCode: string | null;
  exitMessage: string | null;
  failedRecordCount: number | null;
}

export interface ApiCallInfo {
  apiUrl: string;
  method: string;
  parameters: Record<string, unknown> | null;
  totalCalls: number;
  completedCalls: number;
  lastCallTime: string;
}

export interface StepExecutionDto {
  stepExecutionId: number;
  stepName: string;
  status: string;
  startTime: string;
  endTime: string | null;
  readCount: number;
  writeCount: number;
  commitCount: number;
  rollbackCount: number;
  readSkipCount: number;
  processSkipCount: number;
  writeSkipCount: number;
  filterCount: number;
  exitCode: string;
  exitMessage: string | null;
  duration: number | null;
  apiCallInfo: ApiCallInfo | null;
  apiLogSummary: StepApiLogSummary | null;
  failedRecords?: FailedRecordDto[] | null;
}

export interface ApiLogEntryDto {
  logId: number;
  requestUri: string;
  httpMethod: string;
  statusCode: number | null;
  responseTimeMs: number | null;
  responseCount: number | null;
  errorMessage: string | null;
  createdAt: string;
}

export interface StepApiLogSummary {
  totalCalls: number;
  successCount: number;
  errorCount: number;
  avgResponseMs: number;
  maxResponseMs: number;
  minResponseMs: number;
  totalResponseMs: number;
  totalRecordCount: number;
}

export interface ApiLogPageResponse {
  content: ApiLogEntryDto[];
  page: number;
  size: number;
  totalElements: number;
  totalPages: number;
}

export type ApiLogStatus = 'ALL' | 'SUCCESS' | 'ERROR';

export interface FailedRecordDto {
  id: number;
  jobName: string;
  recordKey: string;
  errorMessage: string | null;
  retryCount: number;
  status: string;
  createdAt: string;
}

export interface JobExecutionDetailDto {
  executionId: number;
  jobName: string;
  status: string;
  startTime: string;
  endTime: string | null;
  exitCode: string;
  exitMessage: string | null;
  jobParameters: Record<string, string>;
  jobInstanceId: number;
  duration: number | null;
  readCount: number;
  writeCount: number;
  skipCount: number;
  filterCount: number;
  stepExecutions: StepExecutionDto[];
}

// ── Schedule ─────────────────────────────────────────────────

export interface ScheduleResponse {
  id: number;
  jobName: string;
  cronExpression: string;
  description: string | null;
  active: boolean;
  nextFireTime: string | null;
  previousFireTime: string | null;
  triggerState: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface ScheduleRequest {
  jobName: string;
  cronExpression: string;
  description?: string;
  active?: boolean;
}

// ── Timeline ─────────────────────────────────────────────────

export interface PeriodInfo {
  key: string;
  label: string;
}

export interface ExecutionInfo {
  executionId: number | null;
  status: string;
  startTime: string | null;
  endTime: string | null;
}

export interface ScheduleTimeline {
  jobName: string;
  executions: Record<string, ExecutionInfo | null>;
}

export interface TimelineResponse {
  periodLabel: string;
  periods: PeriodInfo[];
  schedules: ScheduleTimeline[];
}

// ── F4: Execution Search ─────────────────────────────────────

export interface ExecutionSearchResponse {
  executions: JobExecutionDto[];
  totalCount: number;
  page: number;
  size: number;
  totalPages: number;
}

// ── F7: Job Detail ───────────────────────────────────────────

export interface LastExecution {
  executionId: number;
  status: string;
  startTime: string;
  endTime: string | null;
}

export interface JobDetailDto {
  jobName: string;
  displayName: string | null;
  lastExecution: LastExecution | null;
  scheduleCron: string | null;
}

// ── F8: Statistics ───────────────────────────────────────────

export interface DailyStat {
  date: string;
  successCount: number;
  failedCount: number;
  otherCount: number;
  avgDurationMs: number;
}

export interface ExecutionStatisticsDto {
  dailyStats: DailyStat[];
  totalExecutions: number;
  totalSuccess: number;
  totalFailed: number;
  avgDurationMs: number;
}

// ── Recollection History ─────────────────────────────────────

export interface RecollectionHistoryDto {
  historyId: number;
  apiKey: string;
  apiKeyName: string | null;
  jobName: string;
  jobExecutionId: number | null;
  rangeFromDate: string;
  rangeToDate: string;
  executionStatus: string;
  executionStartTime: string | null;
  executionEndTime: string | null;
  durationMs: number | null;
  readCount: number | null;
  writeCount: number | null;
  skipCount: number | null;
  apiCallCount: number | null;
  executor: string | null;
  recollectionReason: string | null;
  failureReason: string | null;
  hasOverlap: boolean | null;
  createdAt: string;
}

export interface RecollectionSearchResponse {
  content: RecollectionHistoryDto[];
  totalElements: number;
  number: number;
  size: number;
  totalPages: number;
  failedRecordCounts: Record<number, number>;
}

export interface RecollectionStatsResponse {
  totalCount: number;
  completedCount: number;
  failedCount: number;
  runningCount: number;
  overlapCount: number;
  recentHistories: RecollectionHistoryDto[];
}

export interface ApiStatsDto {
  callCount: number;
  totalMs: number;
  avgMs: number;
  maxMs: number;
  minMs: number;
}

export interface RecollectionDetailResponse {
  history: RecollectionHistoryDto;
  overlappingHistories: RecollectionHistoryDto[];
  apiStats: ApiStatsDto | null;
  collectionPeriod: CollectionPeriodDto | null;
  stepExecutions: StepExecutionDto[];
}

export interface CollectionPeriodDto {
  apiKey: string;
  apiKeyName: string | null;
  jobName: string | null;
  orderSeq: number | null;
  rangeFromDate: string | null;
  rangeToDate: string | null;
}

// ── Last Collection Status ───────────────────────────────────

export interface LastCollectionStatusDto {
  apiKey: string;
  apiDesc: string | null;
  lastSuccessDate: string | null;
  updatedAt: string | null;
  elapsedMinutes: number;
}

// ── Job Display Name ──────────────────────────────────────────

export interface JobDisplayName {
  id: number;
  jobName: string;
  displayName: string;
  apiKey: string | null;
}

// ── API Functions ────────────────────────────────────────────

export const batchApi = {
  getDashboard: () =>
    fetchJson<DashboardResponse>(`${BASE}/dashboard`),

  getJobs: () =>
    fetchJson<string[]>(`${BASE}/jobs`),

  getJobsDetail: () =>
    fetchJson<JobDetailDto[]>(`${BASE}/jobs/detail`),

  executeJob: (jobName: string, params?: Record<string, string>) => {
    const qs = params ? '?' + new URLSearchParams(params).toString() : '';
    return postJson<{ success: boolean; message: string; executionId?: number }>(
      `${BASE}/jobs/${jobName}/execute${qs}`);
  },

  retryFailedRecords: (jobName: string, recordKeys: string[], stepExecutionId: number) => {
    const qs = new URLSearchParams({
      retryRecordKeys: recordKeys.join(','),
      sourceStepExecutionId: String(stepExecutionId),
      executionMode: 'RECOLLECT',
      executor: 'MANUAL_RETRY',
      reason: `실패 건 수동 재수집 (${recordKeys.length}건)`,
    });
    return postJson<{ success: boolean; message: string; executionId?: number }>(
      `${BASE}/jobs/${jobName}/execute?${qs.toString()}`);
  },

  getJobExecutions: (jobName: string) =>
    fetchJson<JobExecutionDto[]>(`${BASE}/jobs/${jobName}/executions`),

  getRecentExecutions: (limit = 50) =>
    fetchJson<JobExecutionDto[]>(`${BASE}/executions/recent?limit=${limit}`),

  getExecutionDetail: (id: number) =>
    fetchJson<JobExecutionDetailDto>(`${BASE}/executions/${id}/detail`),

  stopExecution: (id: number) =>
    postJson<{ success: boolean; message: string }>(`${BASE}/executions/${id}/stop`),

  // F1: Abandon
  getStaleExecutions: (thresholdMinutes = 60) =>
    fetchJson<JobExecutionDto[]>(`${BASE}/executions/stale?thresholdMinutes=${thresholdMinutes}`),

  abandonExecution: (id: number) =>
    postJson<{ success: boolean; message: string }>(`${BASE}/executions/${id}/abandon`),

  abandonAllStale: (thresholdMinutes = 60) =>
    postJson<{ success: boolean; message: string; abandonedCount?: number }>(
      `${BASE}/executions/stale/abandon-all?thresholdMinutes=${thresholdMinutes}`),

  // F4: Search
  searchExecutions: (params: {
    jobNames?: string[];
    status?: string;
    startDate?: string;
    endDate?: string;
    page?: number;
    size?: number;
  }) => {
    const qs = new URLSearchParams();
    if (params.jobNames && params.jobNames.length > 0) qs.set('jobNames', params.jobNames.join(','));
    if (params.status) qs.set('status', params.status);
    if (params.startDate) qs.set('startDate', params.startDate);
    if (params.endDate) qs.set('endDate', params.endDate);
    qs.set('page', String(params.page ?? 0));
    qs.set('size', String(params.size ?? 50));
    return fetchJson<ExecutionSearchResponse>(`${BASE}/executions/search?${qs.toString()}`);
  },

  // F8: Statistics
  getStatistics: (days = 30) =>
    fetchJson<ExecutionStatisticsDto>(`${BASE}/statistics?days=${days}`),

  getJobStatistics: (jobName: string, days = 30) =>
    fetchJson<ExecutionStatisticsDto>(`${BASE}/statistics/${jobName}?days=${days}`),

  // Schedule
  getSchedules: () =>
    fetchJson<{ schedules: ScheduleResponse[]; count: number }>(`${BASE}/schedules`),

  getSchedule: (jobName: string) =>
    fetchJson<ScheduleResponse>(`${BASE}/schedules/${jobName}`),

  createSchedule: (data: ScheduleRequest) =>
    postJson<{ success: boolean; message: string; data?: ScheduleResponse }>(`${BASE}/schedules`, data),

  updateSchedule: (jobName: string, data: { cronExpression: string; description?: string }) =>
    postJson<{ success: boolean; message: string; data?: ScheduleResponse }>(
      `${BASE}/schedules/${jobName}/update`, data),

  deleteSchedule: (jobName: string) =>
    postJson<{ success: boolean; message: string }>(`${BASE}/schedules/${jobName}/delete`),

  toggleSchedule: (jobName: string, active: boolean) =>
    postJson<{ success: boolean; message: string; data?: ScheduleResponse }>(
      `${BASE}/schedules/${jobName}/toggle`, { active }),

  // Timeline
  getTimeline: (view: string, date: string) =>
    fetchJson<TimelineResponse>(`${BASE}/timeline?view=${view}&date=${date}`),

  getPeriodExecutions: (jobName: string, view: string, periodKey: string) =>
    fetchJson<JobExecutionDto[]>(
      `${BASE}/timeline/period-executions?jobName=${jobName}&view=${view}&periodKey=${periodKey}`),

  // Recollection
  searchRecollections: (params: {
    apiKey?: string;
    jobName?: string;
    status?: string;
    fromDate?: string;
    toDate?: string;
    page?: number;
    size?: number;
  }) => {
    const qs = new URLSearchParams();
    if (params.apiKey) qs.set('apiKey', params.apiKey);
    if (params.jobName) qs.set('jobName', params.jobName);
    if (params.status) qs.set('status', params.status);
    if (params.fromDate) qs.set('fromDate', params.fromDate);
    if (params.toDate) qs.set('toDate', params.toDate);
    qs.set('page', String(params.page ?? 0));
    qs.set('size', String(params.size ?? 20));
    return fetchJson<RecollectionSearchResponse>(`${BASE}/recollection-histories?${qs.toString()}`);
  },

  getStepApiLogs: (stepExecutionId: number, params?: {
    page?: number; size?: number; status?: ApiLogStatus;
  }) => {
    const qs = new URLSearchParams();
    qs.set('page', String(params?.page ?? 0));
    qs.set('size', String(params?.size ?? 50));
    if (params?.status && params.status !== 'ALL') qs.set('status', params.status);
    return fetchJson<ApiLogPageResponse>(
      `${BASE}/steps/${stepExecutionId}/api-logs?${qs.toString()}`);
  },

  getRecollectionDetail: (historyId: number) =>
    fetchJson<RecollectionDetailResponse>(`${BASE}/recollection-histories/${historyId}`),

  getRecollectionStats: () =>
    fetchJson<RecollectionStatsResponse>(`${BASE}/recollection-histories/stats`),

  getCollectionPeriods: () =>
    fetchJson<CollectionPeriodDto[]>(`${BASE}/collection-periods`),

  resetCollectionPeriod: (apiKey: string) =>
    postJson<{ success: boolean; message: string }>(`${BASE}/collection-periods/${apiKey}/reset`),

  updateCollectionPeriod: (apiKey: string, body: { rangeFromDate: string; rangeToDate: string }) =>
    postJson<{ success: boolean; message: string }>(`${BASE}/collection-periods/${apiKey}/update`, body),

  // Last Collection Status
  getLastCollectionStatuses: () =>
    fetchJson<LastCollectionStatusDto[]>(`${BASE}/last-collections`),

  // Display Names
  getDisplayNames: () =>
    fetchJson<JobDisplayName[]>(`${BASE}/display-names`),

  resolveFailedRecords: (ids: number[]) =>
    postJson<{ success: boolean; message: string; resolvedCount?: number }>(
      `${BASE}/failed-records/resolve`, { ids }),

  resetRetryCount: (ids: number[]) =>
    postJson<{ success: boolean; message: string; resetCount?: number }>(
      `${BASE}/failed-records/reset-retry`, { ids }),

  exportRecollectionHistories: (params: {
    apiKey?: string;
    jobName?: string;
    status?: string;
    fromDate?: string;
    toDate?: string;
  }) => {
    const qs = new URLSearchParams();
    if (params.apiKey) qs.set('apiKey', params.apiKey);
    if (params.jobName) qs.set('jobName', params.jobName);
    if (params.status) qs.set('status', params.status);
    if (params.fromDate) qs.set('fromDate', params.fromDate);
    if (params.toDate) qs.set('toDate', params.toDate);
    window.open(`${BASE}/recollection-histories/export?${qs.toString()}`);
  },
};