import type { CandidateMaterial, InterviewRecord } from '@/types/api';

export const candidateRoutes = {
  index: '/pages/candidate/index/index',
  interview: '/pages/candidate/interview/index',
  materials: '/pages/candidate/materials/index',
  progress: '/pages/candidate/progress/index',
  study: '/pages/candidate/study/index'
} as const;

export type CandidateStage = 'interview' | 'materials' | 'review' | 'complete';

export interface CandidateFlow {
  stage: CandidateStage;
  badge: string;
  title: string;
  desc: string;
  progress: number;
  progressText: string;
  notice: string;
  cta: string;
  route: string;
}

export interface CandidateStep {
  index: number;
  title: string;
  desc: string;
  status: 'complete' | 'current' | 'pending';
}

export const buildCandidateFlow = (
  records: InterviewRecord[],
  materials: CandidateMaterial[]
): CandidateFlow => {
  if (!records.length) {
    return {
      stage: 'interview',
      badge: '待面试',
      title: '完成结构化面试',
      desc: '按岗位题目完成回答，提交后生成正式面试记录。',
      progress: 0,
      progressText: '0/2',
      notice: '待完成结构化面试',
      cta: '开始面试',
      route: candidateRoutes.interview
    };
  }

  const materialStatus = materials[0]?.status || '';
  if (!materials.length || materialStatus === '已驳回') {
    const rejected = materialStatus === '已驳回';
    return {
      stage: 'materials',
      badge: rejected ? '资料被驳回' : '待补资料',
      title: rejected ? '重新提交资料' : '上传补充资料',
      desc: rejected ? '请按审核结果补充或替换资料。' : '上传简历、证书或相关图片，供 HR 审核。',
      progress: 50,
      progressText: '1/2',
      notice: rejected ? '资料被驳回，请重新上传' : '面试已完成，请上传补充资料',
      cta: rejected ? '重新上传' : '上传资料',
      route: candidateRoutes.materials
    };
  }

  if (materialStatus === '已通过') {
    return {
      stage: 'complete',
      badge: '资料已通过',
      title: '等待后续通知',
      desc: '面试和补充资料已完成，请留意 HR 后续通知。',
      progress: 100,
      progressText: '2/2',
      notice: '资料已通过，等待后续通知',
      cta: '查看进度',
      route: candidateRoutes.progress
    };
  }

  return {
    stage: 'review',
    badge: '审核中',
    title: '资料审核中',
    desc: '资料已提交，审核结果会同步到进度页。',
    progress: 75,
    progressText: '1/2',
    notice: '资料已提交，等待 HR 审核',
    cta: '查看进度',
    route: candidateRoutes.progress
  };
};

export const buildCandidateSteps = (flow: CandidateFlow): CandidateStep[] => {
  const interviewComplete = flow.stage !== 'interview';
  const materialsComplete = flow.stage === 'complete';
  const materialsCurrent = flow.stage === 'materials' || flow.stage === 'review';

  return [
    {
      index: 1,
      title: '完成面试',
      desc: '按岗位题目作答并生成面试记录',
      status: interviewComplete ? 'complete' : 'current'
    },
    {
      index: 2,
      title: '提交资料',
      desc: '上传简历、证书或相关图片',
      status: materialsComplete ? 'complete' : materialsCurrent ? 'current' : 'pending'
    },
    {
      index: 3,
      title: '等待通知',
      desc: 'HR 审核后同步展示最新状态',
      status: materialsComplete ? 'current' : 'pending'
    }
  ];
};

export const formatCandidateFileSize = (size: number) => {
  if (!size) return '0KB';
  if (size < 1024 * 1024) return `${Math.ceil(size / 1024)}KB`;
  return `${(size / 1024 / 1024).toFixed(1)}MB`;
};

export const materialStatusTone = (status: string) => {
  if (status === '已通过') return 'passed';
  if (status === '已驳回') return 'rejected';
  return 'pending';
};