import PizZip from 'pizzip'
import Docxtemplater from 'docxtemplater'
import { saveAs } from 'file-saver'
import {
  formatNumberValue,
  formatThreeYearIncome,
  formatAgeDistribution,
  formatHistoricalEvidence,
  formatPlatformAccounts,
  formatPriceRange
} from '@/views/valuation/audit/utils'

export const generateReport = async (detailData) => {
  try {
    // Validate input
    if (!detailData || typeof detailData !== 'object') {
      throw new Error('无效的详情数据')
    }

    // Load the template
    const response = await fetch('/report_template.docx')
    if (!response.ok) {
      throw new Error('Failed to load report template')
    }
    const content = await response.arrayBuffer()

    const zip = new PizZip(content)
    const doc = new Docxtemplater(zip, {
      paragraphLoop: true,
      linebreaks: true,
      delimiters: { start: '${', end: '}' },
      // 当字段不存在时，保持原始的 ${字段名} 格式，不替换
      nullGetter: (part) => {
        if (!part.module) {
          return '${' + part.value + '}'
        }
        return ''
      },
    })

    // Helper function to safely add field only if it exists
    const addIfExists = (obj, key, value) => {
      if (value !== undefined && value !== null) {
        obj[key] = value
      }
    }

    // Extract calculation data
    const calcInput = detailData.calculation_input || {}
    const calcResult = detailData.calculation_result || {}
    const modelData = calcInput.model_data || {}
    const ecoData = modelData.economic_data || {}
    const cultData = modelData.cultural_data || {}
    const riskData = modelData.risky_data || {}
    const marketData = calcInput.market_data || {}

    // Prepare data - only include fields that actually exist
    const data = {
      // Spread all existing detailData fields
      ...detailData,

      // Date fields (always generated)
      yyyy: new Date().getFullYear(),
      mm: String(new Date().getMonth() + 1).padStart(2, '0'),
      dd: String(new Date().getDate()).padStart(2, '0'),
      yyyymmdd: `${new Date().getFullYear()}${String(new Date().getMonth() + 1).padStart(2, '0')}${String(new Date().getDate()).padStart(2, '0')}`,
    }

    // Handle inheritor_age_count array - format each item
    if (detailData.inheritor_age_count && Array.isArray(detailData.inheritor_age_count)) {
      const ageData = formatAgeDistribution(detailData.inheritor_age_count)
      // 提供格式化后的完整文本
      data.inheritor_age_count_text = ageData.join('\n')
      // 提供单独的数值，支持 ${inheritor_age_count[0]} 这样的用法
      if (detailData.inheritor_age_count[0] !== undefined) {
        data['inheritor_age_count[0]'] = detailData.inheritor_age_count[0]
      }
      if (detailData.inheritor_age_count[1] !== undefined) {
        data['inheritor_age_count[1]'] = detailData.inheritor_age_count[1]
      }
      if (detailData.inheritor_age_count[2] !== undefined) {
        data['inheritor_age_count[2]'] = detailData.inheritor_age_count[2]
      }
    }

    // Handle historical_evidence object - format as text
    if (detailData.historical_evidence && typeof detailData.historical_evidence === 'object') {
      const evidenceData = formatHistoricalEvidence(detailData.historical_evidence)
      // 提供格式化后的完整文本（换行分隔）
      data.historical_evidence = evidenceData.join('\n')
    }

    // Handle platform_accounts object - format as text
    if (detailData.platform_accounts && typeof detailData.platform_accounts === 'object') {
      const accountsData = formatPlatformAccounts(detailData.platform_accounts)
      // 提供格式化后的完整文本（换行分隔）
      data.platform_accounts = accountsData.join('\n')
    }

    // Handle price_fluctuation array
    if (detailData.price_fluctuation && Array.isArray(detailData.price_fluctuation)) {
      const min = detailData.price_fluctuation[0]
      const max = detailData.price_fluctuation[1]

      // 提供单独的数值，支持 ${price_fluctuation[0]} 这样的用法
      if (min !== undefined) {
        data['price_fluctuation[0]'] = min
        data.price_min = min
      }
      if (max !== undefined) {
        data['price_fluctuation[1]'] = max
        data.price_max = max
      }

      // 提供多种格式的范围文本
      if (min !== undefined && max !== undefined) {
        // 简单范围（数字-数字）
        data.price_range = `${min}-${max}`
        // 带"元"的范围
        data.price_range_yuan = `${min}-${max}元`
        // 带货币符号的范围
        data.price_fluctuation_range = formatPriceRange(detailData.price_fluctuation)
        // 精确匹配模板中的字段名（作为一个整体的字段名）
        data['price_fluctuation[0]-price_fluctuation[1]'] = `${min}-${max}`
      }
    }

    // Add calculation results if they exist
    if (calcResult.model_value_b !== undefined) data.B = formatNumberValue(calcResult.model_value_b)
    if (calcResult.economic_value_b1 !== undefined) data.B1 = formatNumberValue(calcResult.economic_value_b1)
    if (calcResult.cultural_value_b2 !== undefined) data.B2 = formatNumberValue(calcResult.cultural_value_b2)
    if (calcResult.risk_adjustment_b3 !== undefined) data.B3 = calcResult.risk_adjustment_b3
    if (calcResult.market_value_c !== undefined) data.C = formatNumberValue(calcResult.market_value_c)

    // Add DPR if exists
    const dpr = detailData.drp_result?.dynamic_pledge_rate || detailData.dynamic_pledge_rate
    if (dpr !== undefined) data.DPR = dpr

    // Add economic data fields if they exist
    if (ecoData.basic_value_b11 !== undefined) data.B11 = formatNumberValue(ecoData.basic_value_b11)
    if (ecoData.financial_value !== undefined) data.F = formatNumberValue(ecoData.financial_value)
    if (ecoData.legal_strength !== undefined) data.L = ecoData.legal_strength
    if (ecoData.development_potential !== undefined) data.D = ecoData.development_potential
    if (ecoData.traffic_factor_b12 !== undefined) data.B12 = ecoData.traffic_factor_b12
    if (ecoData.search_index_s1 !== undefined) data.search_index_ratio = ecoData.search_index_s1
    if (ecoData.social_media_spread_s3 !== undefined) data.S3 = ecoData.social_media_spread_s3
    if (ecoData.policy_multiplier_b13 !== undefined) data.B13 = ecoData.policy_multiplier_b13
    if (ecoData.policy_compatibility_score !== undefined) data.policy_fit_score = ecoData.policy_compatibility_score

    // Add cultural data fields if they exist
    if (cultData.living_inheritance_b21 !== undefined) data.B21 = cultData.living_inheritance_b21
    if (cultData.inheritor_level_coefficient !== undefined) data.inheritor_level_score = cultData.inheritor_level_coefficient
    if (cultData.teaching_frequency !== undefined) data.teaching_frequency_score = cultData.teaching_frequency
    if (cultData.cross_border_depth !== undefined) data.cooperation_depth_score = cultData.cross_border_depth
    if (cultData.pattern_entropy_b22 !== undefined) data.B22 = cultData.pattern_entropy_b22
    if (cultData.structure_complexity !== undefined) data.SC = cultData.structure_complexity
    if (cultData.normalized_entropy !== undefined) data.H = cultData.normalized_entropy
    if (cultData.historical_inheritance !== undefined) data.HI = cultData.historical_inheritance

    // Add risk data fields if they exist
    if (riskData.risk_market !== undefined) data.risk_market = riskData.risk_market
    if (riskData.risk_legal !== undefined) data.risk_legal = riskData.risk_legal
    if (riskData.risk_inheritance !== undefined) data.risk_inheritance = riskData.risk_inheritance

    // Add market data fields if they exist
    if (marketData.market_bidding_c1 !== undefined) data.C1 = formatNumberValue(marketData.market_bidding_c1)
    if (marketData.heat_coefficient_c2 !== undefined) data.C2 = marketData.heat_coefficient_c2
    if (marketData.scarcity_multiplier_c3 !== undefined) data.C3 = marketData.scarcity_multiplier_c3
    if (marketData.time_decay_c4 !== undefined) data.C4 = marketData.time_decay_c4

    doc.render(data)

    const out = doc.getZip().generate({
      type: 'blob',
      mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
    })

    saveAs(out, `${detailData.asset_name || '评估报告'}.docx`)
  } catch (error) {
    console.error('Report generation failed:', error)
    throw error
  }
}