import { getCampuses } from '@/api/management/organization'
import { unwrapApiResponse } from '@/utils/api-response'
import { mockFlags } from '@/utils/mock-flags'
import { request } from '@/utils/request'
import type { ApiResponse } from '@/types/common'

import type {
  BackendSigningMethod,
  BackendSigningTaskStatus,
  HomeRankingPeriod,
  SigningMethod,
  WorkbenchCampus,
  WorkbenchDocumentRanking,
  WorkbenchOverviewQuery,
  WorkbenchOverviewRequestDto,
  WorkbenchOverviewResponse,
  WorkbenchOverviewResponseDto,
  WorkbenchTodoStatus,
  WorkbenchTodoTask,
  WorkbenchTrendPoint,
} from './types'

const useMockData = mockFlags.workbenchHome

interface MockCampusOverview {
  summary: WorkbenchOverviewResponse['summary']
  /** 趋势的日均人次基数（按「院区 + 日期」播种出每天的具体值，见 createTrend） */
  trendBase: number
  todos: WorkbenchTodoTask[]
  ranking: Array<Omit<WorkbenchDocumentRanking, 'signedCount'> & { baseCount: number }>
}

const mockCampusOverviews: Record<WorkbenchCampus, MockCampusOverview> = {
  本部院区: {
    summary: {
      todaySigned: 36,
      todaySignedChange: 2,
      pendingPatientSigning: 18,
      todayOverdue: 2,
      availableTemplates: 128,
      coveredDepartments: 9,
    },
    trendBase: 32,
    todos: [
      {
        id: 'T0818003',
        patientId: 'P202610005',
        patientName: '陈志强',
        documentName: '住院须知及告知书',
        department: '消化内科',
        status: 'pending',
        method: 'pad',
        updatedAt: '2026-08-27 11:20',
      },
      {
        id: 'T0818002',
        patientId: 'P202610002',
        patientName: '李淑芬',
        documentName: 'MRI 磁共振检查知情同意书',
        department: '放射科',
        status: 'pending',
        method: 'sms',
        updatedAt: '2026-08-27 10:05',
      },
      {
        id: 'T0815001',
        patientId: 'P202610001',
        patientName: '王建国',
        documentName: '心包穿刺知情同意书',
        department: '心内科',
        status: 'overdue',
        method: 'sms',
        updatedAt: '2026-08-27 09:40',
      },
      {
        // Pad 移动端：待办里要四种方式都有样本，徽标配色才看得出区别
        id: 'T0818004',
        patientId: 'P202610003',
        patientName: '赵某某',
        documentName: '住院须知及告知书',
        department: '消化内科',
        status: 'pending',
        method: 'ipad',
        updatedAt: '2026-08-27 09:05',
      },
      {
        id: 'T0818005',
        patientId: 'P202610007',
        patientName: '孙浩然',
        documentName: '内镜检查知情同意书',
        department: '普外科',
        status: 'pending',
        method: 'wx',
        updatedAt: '2026-08-27 08:50',
      },
    ],
    ranking: [
      { id: 'doc-001', documentName: '住院患者知情同意书', department: '全院通用', baseCount: 58 },
      { id: 'doc-002', documentName: '入院须知及告知书', department: '全院通用', baseCount: 51 },
      {
        id: 'doc-003',
        documentName: 'MRI 磁共振检查知情同意书',
        department: '放射科',
        baseCount: 43,
      },
      { id: 'doc-004', documentName: '手术知情同意书', department: '普外科', baseCount: 39 },
      { id: 'doc-005', documentName: '麻醉知情同意书', department: '麻醉科', baseCount: 35 },
      { id: 'doc-006', documentName: '患者授权委托书', department: '医务处', baseCount: 31 },
      { id: 'doc-007', documentName: '输血治疗知情同意书', department: '血液科', baseCount: 27 },
      { id: 'doc-008', documentName: '内镜检查知情同意书', department: '消化内科', baseCount: 24 },
      { id: 'doc-009', documentName: '介入治疗知情同意书', department: '心内科', baseCount: 21 },
      { id: 'doc-010', documentName: '特殊检查风险告知书', department: '影像科', baseCount: 18 },
    ],
  },
  东院区: {
    summary: {
      todaySigned: 22,
      todaySignedChange: 1,
      pendingPatientSigning: 11,
      todayOverdue: 1,
      availableTemplates: 76,
      coveredDepartments: 6,
    },
    trendBase: 20,
    todos: [
      {
        id: 'T0818001',
        patientId: 'P202610004',
        patientName: '赵美英',
        documentName: '体检报告发放及知情同意书',
        department: '健康管理中心',
        status: 'pending',
        method: 'pad',
        updatedAt: '2026-08-27 09:12',
      },
      {
        id: 'T0818011',
        patientId: 'P202610011',
        patientName: '周雅琴',
        documentName: '检查前注意事项告知书',
        department: '体检中心',
        status: 'overdue',
        method: 'sms',
        updatedAt: '2026-08-27 08:30',
      },
      {
        id: 'T0818012',
        patientId: 'P202610003',
        patientName: '赵某某',
        documentName: '住院须知及告知书',
        department: '消化内科',
        status: 'pending',
        method: 'ipad',
        updatedAt: '2026-08-27 09:05',
      },
      {
        id: 'T0818013',
        patientId: 'P202610007',
        patientName: '孙浩然',
        documentName: '内镜检查知情同意书',
        department: '普外科',
        status: 'pending',
        method: 'wx',
        updatedAt: '2026-08-27 08:50',
      },
    ],
    ranking: [
      {
        id: 'doc-011',
        documentName: '体检报告发放及知情同意书',
        department: '健康管理中心',
        baseCount: 46,
      },
      { id: 'doc-012', documentName: '检前告知书', department: '健康管理中心', baseCount: 39 },
      {
        id: 'doc-013',
        documentName: '超声检查知情同意书',
        department: '超声医学科',
        baseCount: 32,
      },
      {
        id: 'doc-014',
        documentName: '胃肠镜检查知情同意书',
        department: '消化内科',
        baseCount: 28,
      },
      { id: 'doc-015', documentName: '采血及检验告知书', department: '检验科', baseCount: 25 },
      { id: 'doc-016', documentName: '影像检查告知书', department: '影像科', baseCount: 21 },
      { id: 'doc-017', documentName: '健康体检知情同意书', department: '体检中心', baseCount: 19 },
      { id: 'doc-018', documentName: '隐私保护告知书', department: '健康管理中心', baseCount: 16 },
      { id: 'doc-019', documentName: '麻醉检查知情同意书', department: '麻醉科', baseCount: 14 },
      { id: 'doc-020', documentName: '报告领取授权书', department: '健康管理中心', baseCount: 12 },
    ],
  },
  西院区: {
    summary: {
      todaySigned: 17,
      todaySignedChange: 2,
      pendingPatientSigning: 9,
      todayOverdue: 2,
      availableTemplates: 54,
      coveredDepartments: 5,
    },
    trendBase: 15,
    todos: [
      {
        id: 'T0818021',
        patientId: 'P202610021',
        patientName: '孙浩然',
        documentName: '心脏介入手术知情同意书',
        department: '心内科',
        status: 'pending',
        method: 'pad',
        updatedAt: '2026-08-27 10:15',
      },
      {
        id: 'T0818022',
        patientId: 'P202610022',
        patientName: '刘晓琴',
        documentName: '骨科手术知情同意书',
        department: '骨科',
        status: 'pending',
        method: 'sms',
        updatedAt: '2026-08-27 09:52',
      },
      {
        id: 'T0818023',
        patientId: 'P202610023',
        patientName: '何文博',
        documentName: '术前麻醉访视告知书',
        department: '麻醉科',
        status: 'overdue',
        method: 'pad',
        updatedAt: '2026-08-27 08:05',
      },
      {
        id: 'T0818024',
        patientId: 'P202610003',
        patientName: '赵某某',
        documentName: '住院须知及告知书',
        department: '消化内科',
        status: 'pending',
        method: 'ipad',
        updatedAt: '2026-08-27 09:05',
      },
      {
        id: 'T0818025',
        patientId: 'P202610007',
        patientName: '孙浩然',
        documentName: '内镜检查知情同意书',
        department: '普外科',
        status: 'pending',
        method: 'wx',
        updatedAt: '2026-08-27 08:50',
      },
    ],
    ranking: [
      {
        id: 'doc-021',
        documentName: '心脏介入手术知情同意书',
        department: '心内科',
        baseCount: 37,
      },
      { id: 'doc-022', documentName: '骨科手术知情同意书', department: '骨科', baseCount: 33 },
      { id: 'doc-023', documentName: '术前麻醉访视告知书', department: '麻醉科', baseCount: 28 },
      { id: 'doc-024', documentName: '住院患者知情同意书', department: '全院通用', baseCount: 25 },
      { id: 'doc-025', documentName: '输血治疗知情同意书', department: '血液科', baseCount: 22 },
      { id: 'doc-026', documentName: '介入治疗知情同意书', department: '心内科', baseCount: 20 },
      { id: 'doc-027', documentName: '术后康复告知书', department: '骨科', baseCount: 18 },
      { id: 'doc-028', documentName: '特殊检查风险告知书', department: '影像科', baseCount: 16 },
      { id: 'doc-029', documentName: '患者授权委托书', department: '医务处', baseCount: 14 },
      { id: 'doc-030', documentName: '手术部位标识确认书', department: '手术部', baseCount: 12 },
    ],
  },
}

function getPeriodFactor(period: HomeRankingPeriod) {
  return period === 7 ? 1 : period === 14 ? 2 : 3.5
}

/** 「院区 + 日期」→ 固定种子：同一天同一院区的数值不随刷新、切换时段或翻页而变 */
function hashSeed(text: string) {
  let hash = 2166136261

  for (let index = 0; index < text.length; index += 1) {
    hash ^= text.charCodeAt(index)
    hash = Math.imul(hash, 16777619)
  }

  return hash >>> 0
}

/** mulberry32：小、快、同种子可复现（与 api/workbench/report-analytics.ts 同一套做法） */
function createRandom(seed: number) {
  let state = seed >>> 0

  return () => {
    state = (state + 0x6d2b79f5) >>> 0
    let t = state
    t = Math.imul(t ^ (t >>> 15), t | 1)
    t ^= t + Math.imul(t ^ (t >>> 7), t | 61)

    return ((t ^ (t >>> 14)) >>> 0) / 4294967296
  }
}

/**
 * 演示趋势：近 period 天（含今天）的已签署人次。
 *
 * 为什么不用写死的日期数组：写死 8/21–8/27 之后，演示日一过「近 7 天」窗口就全是过期日期
 * （仓库的演示数据铁律：**日期相对** + **确定性**，不要 Math.random）。
 * 末点取今日已签署，与指标卡同源 —— 原型里趋势最后一点就是今天已签署的任务数。
 */
function createTrend(
  campus: WorkbenchCampus,
  summary: WorkbenchOverviewResponse['summary'],
  period: HomeRankingPeriod,
): WorkbenchTrendPoint[] {
  const points: WorkbenchTrendPoint[] = []
  const base = (mockCampusOverviews[campus] ?? mockCampusOverviews['本部院区']).trendBase

  for (let offset = period - 1; offset >= 0; offset -= 1) {
    const day = new Date()
    day.setDate(day.getDate() - offset)
    const label = `${day.getMonth() + 1}/${day.getDate()}`
    const value =
      offset === 0
        ? summary.todaySigned
        : Math.max(base + Math.round(createRandom(hashSeed(`${campus}-${label}`))() * 12 - 5), 0)

    points.push({ label, value })
  }

  return points
}

function createRanking(
  rows: MockCampusOverview['ranking'],
  period: HomeRankingPeriod,
): WorkbenchDocumentRanking[] {
  const factor = getPeriodFactor(period)

  return rows
    .map((row, index) => ({
      id: row.id,
      documentName: row.documentName,
      department: row.department,
      signedCount: Math.round(row.baseCount * factor + (index % 3)),
    }))
    .sort((left, right) => right.signedCount - left.signedCount)
}

/**
 * 首页「我的待办」最多几条。
 *
 * 原型 `renderDash()` 是 `tasks.slice(0, 5)`（最多 5 条）。
 * 仓库收成 **3 条**（2026-09-30 定）：趋势卡与待办卡同行，待办越多行高越高，
 * 图是按宽度定高的、贴底后会在标题与图之间留大片空白 —— 3 条时两张卡高度基本齐平。
 * 该上限同时作为 `todoLimit` 传给后端，避免取回一批再丢掉。
 */
const TODO_LIMIT = 3
const RANKING_LIMIT = 10
let campusIds: Map<string, string> | null = null
let campusIdsRequest: Promise<Map<string, string>> | null = null

function mapTodoStatus(status: BackendSigningTaskStatus): WorkbenchTodoStatus {
  switch (status) {
    case 'CREATED':
      return 'created'
    case 'WAITING_SIGN':
      return 'pending'
    case 'GENERATING':
      return 'generating'
    case 'EXPIRED':
      return 'overdue'
    case 'SIGNED':
      return 'signed'
    case 'VOIDED':
      return 'voided'
    case 'FAILED':
    default:
      return 'failed'
  }
}

const METHOD_BY_BACKEND: Record<BackendSigningMethod, SigningMethod> = {
  PAD: 'pad',
  SMS: 'sms',
  IPAD: 'ipad',
  WX: 'wx',
}

function mapSigningMethod(method: BackendSigningMethod): SigningMethod {
  // 后端理论上只回这四个；未知取值按手写板兜底，避免整行渲染不出来
  return METHOD_BY_BACKEND[method] ?? 'pad'
}

function mapWorkbenchOverview(dto: WorkbenchOverviewResponseDto): WorkbenchOverviewResponse {
  const summary = dto.summary

  return {
    summary: {
      todaySigned: summary?.todaySigned ?? 0,
      todaySignedChange: summary?.todaySignedChange ?? 0,
      pendingPatientSigning: summary?.pendingPatientSigning ?? 0,
      todayOverdue: summary?.todayOverdue ?? 0,
      availableTemplates: summary?.availableTemplates ?? 0,
      coveredDepartments: summary?.coveredDepartments ?? 0,
    },
    trend: (dto.trend ?? []).map<WorkbenchTrendPoint>((point) => ({
      label: point.label || point.date,
      value: point.signedCount,
    })),
    todos: (dto.todos ?? []).map<WorkbenchTodoTask>((task) => ({
      id: task.taskId,
      patientId: task.patientId,
      patientName: task.patientName,
      documentName: task.documentName,
      department: task.departmentName,
      status: mapTodoStatus(task.status),
      method: mapSigningMethod(task.signMethod),
      updatedAt: task.updatedAt,
    })),
    documentRanking: (dto.documentRanking ?? []).map<WorkbenchDocumentRanking>((item) => ({
      id: item.templateId,
      documentName: item.documentName,
      department: item.departmentName,
      signedCount: item.signedCount,
    })),
  }
}

function getCampusIds() {
  if (campusIds) {
    return Promise.resolve(campusIds)
  }

  if (!campusIdsRequest) {
    campusIdsRequest = getCampuses()
      .then((campuses) => {
        campusIds = new Map(campuses.map((campus) => [campus.name, campus.id]))
        return campusIds
      })
      .finally(() => {
        campusIdsRequest = null
      })
  }

  return campusIdsRequest
}

async function resolveCampusId(campusName: WorkbenchCampus) {
  const campusId = (await getCampusIds()).get(campusName)

  if (!campusId) {
    throw new Error('未找到院区：' + campusName)
  }

  return campusId
}

export async function getWorkbenchOverview(
  query: WorkbenchOverviewQuery,
): Promise<WorkbenchOverviewResponse> {
  if (useMockData) {
    const overview = mockCampusOverviews[query.campus] ?? mockCampusOverviews['本部院区']
    const summary = { ...overview.summary }

    return {
      summary,
      trend: createTrend(query.campus, summary, query.rankingPeriod),
      todos: overview.todos.slice(0, TODO_LIMIT).map((task) => ({ ...task })),
      documentRanking: createRanking(overview.ranking, query.rankingPeriod),
    }
  }

  const campusId = query.campusId || (await resolveCampusId(query.campus))
  const params: WorkbenchOverviewRequestDto = {
    campusId,
    period: query.rankingPeriod,
    todoLimit: TODO_LIMIT,
    rankingLimit: RANKING_LIMIT,
  }
  const response = await request.get<ApiResponse<WorkbenchOverviewResponseDto>>(
    '/v1/workbench/overview',
    { params },
  )

  return mapWorkbenchOverview(unwrapApiResponse(response))
}