/**
 * 宠物疫苗管理工具类
 * 负责疫苗数据的存储、分析和AI建议生成
 */

class VaccineManager {
	constructor() {
		this.storageKey = 'pet_vaccine_records'
		
		// 疫苗类型定义
		this.vaccineTypes = {
			core: {
				'rabies': {
					name: '狂犬病疫苗',
					duration: 365, // 有效期天数
					interval: 365, // 接种间隔天数
					required: true,
					description: '预防狂犬病，法律要求必须接种'
				},
				'fvrcp': {
					name: '猫三联疫苗',
					duration: 365,
					interval: 365,
					required: true,
					description: '预防猫瘟热、猫杯状病毒、猫鼻气管炎'
				}
			},
			nonCore: {
				'felv': {
					name: '猫白血病疫苗',
					duration: 365,
					interval: 365,
					required: false,
					description: '预防猫白血病病毒感染'
				},
				'fip': {
					name: '猫传腹疫苗',
					duration: 365,
					interval: 365,
					required: false,
					description: '预防猫传染性腹膜炎'
				},
				'chlamydia': {
					name: '猫衣原体疫苗',
					duration: 365,
					interval: 365,
					required: false,
					description: '预防猫衣原体感染'
				}
			}
		}
	}

	/**
	 * 获取宠物的疫苗记录
	 * @param {string} petId 宠物ID
	 * @returns {Array} 疫苗记录数组
	 */
	getVaccineRecords(petId) {
		try {
			const allRecords = uni.getStorageSync(this.storageKey) || {}
			let records = allRecords[petId] || []
			
			// 如果没有数据，初始化一些测试数据
			if (records.length === 0) {
				records = this.initializeTestData(petId)
				allRecords[petId] = records
				uni.setStorageSync(this.storageKey, allRecords)
			}
			
			return records
		} catch (error) {
			console.error('获取疫苗记录失败:', error)
			return this.initializeTestData(petId)
		}
	}

	/**
	 * 初始化测试数据
	 * @param {string} petId 宠物ID
	 * @returns {Array} 测试数据数组
	 */
	initializeTestData(petId) {
		const now = new Date()
		const testData = []
		
		// 狂犬病疫苗记录
		testData.push({
			id: Date.now() + 1,
			petId: petId,
			vaccineType: 'rabies',
			vaccineName: '狂犬病疫苗',
			vaccineDate: new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000).toISOString(),
			expiryDate: new Date(now.getTime() + 335 * 24 * 60 * 60 * 1000).toISOString(),
			batchNumber: 'RAB2024001',
			hospital: '宠物医院',
			veterinarian: '张医生',
			note: '首次接种',
			category: 'core',
			status: 'completed'
		})
		
		// 猫三联疫苗记录
		testData.push({
			id: Date.now() + 2,
			petId: petId,
			vaccineType: 'fvrcp',
			vaccineName: '猫三联疫苗',
			vaccineDate: new Date(now.getTime() - 45 * 24 * 60 * 60 * 1000).toISOString(),
			expiryDate: new Date(now.getTime() + 320 * 24 * 60 * 60 * 1000).toISOString(),
			batchNumber: 'FVRCP2024001',
			hospital: '宠物医院',
			veterinarian: '李医生',
			note: '年度接种',
			category: 'core',
			status: 'completed'
		})
		
		// 猫白血病疫苗记录
		testData.push({
			id: Date.now() + 3,
			petId: petId,
			vaccineType: 'felv',
			vaccineName: '猫白血病疫苗',
			vaccineDate: new Date(now.getTime() - 60 * 24 * 60 * 60 * 1000).toISOString(),
			expiryDate: new Date(now.getTime() + 305 * 24 * 60 * 60 * 1000).toISOString(),
			batchNumber: 'FELV2024001',
			hospital: '宠物医院',
			veterinarian: '王医生',
			note: '可选接种',
			category: 'nonCore',
			status: 'completed'
		})
		
		return testData
	}

	/**
	 * 添加疫苗记录
	 * @param {string} petId 宠物ID
	 * @param {Object} record 疫苗记录
	 */
	addVaccineRecord(petId, record) {
		try {
			const allRecords = uni.getStorageSync(this.storageKey) || {}
			if (!allRecords[petId]) {
				allRecords[petId] = []
			}
			
			const vaccineInfo = this.getVaccineInfo(record.vaccineType)
			const vaccineDate = new Date(record.vaccineDate)
			const expiryDate = new Date(vaccineDate.getTime() + vaccineInfo.duration * 24 * 60 * 60 * 1000)
			
			const newRecord = {
				id: Date.now(),
				petId: petId,
				vaccineType: record.vaccineType,
				vaccineName: vaccineInfo.name,
				vaccineDate: record.vaccineDate,
				expiryDate: expiryDate.toISOString(),
				batchNumber: record.batchNumber || '',
				hospital: record.hospital || '',
				veterinarian: record.veterinarian || '',
				note: record.note || '',
				category: vaccineInfo.category,
				status: 'completed'
			}
			
			allRecords[petId].push(newRecord)
			allRecords[petId].sort((a, b) => new Date(b.vaccineDate) - new Date(a.vaccineDate))
			
			uni.setStorageSync(this.storageKey, allRecords)
			return newRecord
		} catch (error) {
			console.error('添加疫苗记录失败:', error)
			return null
		}
	}

	/**
	 * 获取疫苗信息
	 * @param {string} vaccineType 疫苗类型
	 * @returns {Object} 疫苗信息
	 */
	getVaccineInfo(vaccineType) {
		const coreVaccine = this.vaccineTypes.core[vaccineType]
		if (coreVaccine) {
			return { ...coreVaccine, category: 'core' }
		}
		
		const nonCoreVaccine = this.vaccineTypes.nonCore[vaccineType]
		if (nonCoreVaccine) {
			return { ...nonCoreVaccine, category: 'nonCore' }
		}
		
		return {
			name: '未知疫苗',
			duration: 365,
			interval: 365,
			required: false,
			category: 'unknown'
		}
	}

	/**
	 * 获取疫苗状态统计
	 * @param {string} petId 宠物ID
	 * @returns {Object} 状态统计
	 */
	getVaccineStatusSummary(petId) {
		const records = this.getVaccineRecords(petId)
		const now = new Date()
		
		let completed = 0
		let expiringSoon = 0 // 30天内到期
		let expired = 0
		let missing = 0
		
		// 检查核心疫苗
		Object.keys(this.vaccineTypes.core).forEach(vaccineType => {
			const latestRecord = records
				.filter(r => r.vaccineType === vaccineType)
				.sort((a, b) => new Date(b.vaccineDate) - new Date(a.vaccineDate))[0]
			
			if (!latestRecord) {
				missing++
			} else {
				const expiryDate = new Date(latestRecord.expiryDate)
				const daysUntilExpiry = Math.ceil((expiryDate - now) / (1000 * 60 * 60 * 24))
				
				if (daysUntilExpiry < 0) {
					expired++
				} else if (daysUntilExpiry <= 30) {
					expiringSoon++
				} else {
					completed++
				}
			}
		})
		
		const total = Object.keys(this.vaccineTypes.core).length
		const completionRate = Math.round((completed / total) * 100)
		
		return {
			completed,
			expiringSoon,
			expired,
			missing,
			total,
			completionRate
		}
	}

	/**
	 * 获取疫苗状态
	 * @param {Object} record 疫苗记录
	 * @returns {string} 状态
	 */
	getVaccineStatus(record) {
		const now = new Date()
		const expiryDate = new Date(record.expiryDate)
		const daysUntilExpiry = Math.ceil((expiryDate - now) / (1000 * 60 * 60 * 24))
		
		if (daysUntilExpiry < 0) {
			return 'expired'
		} else if (daysUntilExpiry <= 30) {
			return 'expiring'
		} else {
			return 'valid'
		}
	}

	/**
	 * 生成疫苗接种计划
	 * @param {string} petId 宠物ID
	 * @param {Object} petInfo 宠物信息
	 * @returns {Array} 接种计划
	 */
	generateVaccinePlan(petId, petInfo) {
		const records = this.getVaccineRecords(petId)
		const now = new Date()
		const plan = []
		
		// 检查所有疫苗类型
		const allVaccineTypes = { ...this.vaccineTypes.core, ...this.vaccineTypes.nonCore }
		
		Object.entries(allVaccineTypes).forEach(([vaccineType, vaccineInfo]) => {
			const latestRecord = records
				.filter(r => r.vaccineType === vaccineType)
				.sort((a, b) => new Date(b.vaccineDate) - new Date(a.vaccineDate))[0]
			
			let nextDueDate
			let priority = 'low'
			let reason = ''
			
			if (!latestRecord) {
				// 从未接种
				if (vaccineInfo.required) {
					nextDueDate = new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000) // 一周后
					priority = 'high'
					reason = '必需疫苗，建议尽快接种'
				} else {
					nextDueDate = new Date(now.getTime() + 30 * 24 * 60 * 60 * 1000) // 一个月后
					priority = 'medium'
					reason = '可选疫苗，建议接种'
				}
			} else {
				// 已接种，计算下次接种时间
				const lastVaccineDate = new Date(latestRecord.vaccineDate)
				nextDueDate = new Date(lastVaccineDate.getTime() + vaccineInfo.interval * 24 * 60 * 60 * 1000)
				
				const daysUntilDue = Math.ceil((nextDueDate - now) / (1000 * 60 * 60 * 24))
				
				if (daysUntilDue <= 0) {
					priority = 'high'
					reason = '疫苗已过期，需要立即接种'
				} else if (daysUntilDue <= 30) {
					priority = 'medium'
					reason = '疫苗即将到期，建议提前接种'
				} else {
					priority = 'low'
					reason = '疫苗有效期内'
				}
			}
			
			plan.push({
				vaccineType,
				vaccineName: vaccineInfo.name,
				category: vaccineType in this.vaccineTypes.core ? 'core' : 'nonCore',
				nextDueDate: nextDueDate.toISOString(),
				priority,
				reason,
				required: vaccineInfo.required,
				lastVaccineDate: latestRecord ? latestRecord.vaccineDate : null
			})
		})
		
		// 按优先级和到期时间排序
		plan.sort((a, b) => {
			const priorityOrder = { 'high': 3, 'medium': 2, 'low': 1 }
			if (priorityOrder[a.priority] !== priorityOrder[b.priority]) {
				return priorityOrder[b.priority] - priorityOrder[a.priority]
			}
			return new Date(a.nextDueDate) - new Date(b.nextDueDate)
		})
		
		return plan
	}

	/**
	 * 生成AI分析建议
	 * @param {string} petId 宠物ID
	 * @param {Object} petInfo 宠物信息
	 * @returns {Object} AI分析结果
	 */
	generateAIAnalysis(petId, petInfo) {
		const records = this.getVaccineRecords(petId)
		const statusSummary = this.getVaccineStatusSummary(petId)
		const vaccinePlan = this.generateVaccinePlan(petId, petInfo)
		
		// 疫苗完整性分析
		let completenessAnalysis = ''
		if (statusSummary.completionRate >= 100) {
			completenessAnalysis = `${petInfo.name}的核心疫苗接种完整，免疫保护良好。`
		} else if (statusSummary.completionRate >= 50) {
			completenessAnalysis = `${petInfo.name}的疫苗接种基本完整，但还有${statusSummary.missing}种核心疫苗需要接种。`
		} else {
			completenessAnalysis = `${petInfo.name}的疫苗接种不完整，缺少${statusSummary.missing}种核心疫苗，存在健康风险。`
		}
		
		// 时效性分析
		let timelinessAnalysis = ''
		if (statusSummary.expired > 0) {
			timelinessAnalysis = `有${statusSummary.expired}种疫苗已过期，免疫保护可能失效，建议立即补种。`
		} else if (statusSummary.expiringSoon > 0) {
			timelinessAnalysis = `有${statusSummary.expiringSoon}种疫苗即将到期，建议提前安排接种。`
		} else {
			timelinessAnalysis = '所有疫苗均在有效期内，免疫保护充分。'
		}
		
		// 个性化建议
		const highPriorityVaccines = vaccinePlan.filter(v => v.priority === 'high')
		let recommendations = ''
		if (highPriorityVaccines.length > 0) {
			const vaccineNames = highPriorityVaccines.map(v => v.vaccineName).join('、')
			recommendations = `建议优先接种：${vaccineNames}。根据${petInfo.name}的年龄（${petInfo.age}岁）和生活环境，这些疫苗对健康保护至关重要。`
		} else {
			recommendations = `当前疫苗状态良好，建议按计划进行常规疫苗接种。定期检查疫苗有效期，确保免疫保护持续有效。`
		}
		
		// 风险评估
		let riskAssessment = ''
		if (statusSummary.expired > 0 || statusSummary.missing > 0) {
			riskAssessment = '存在免疫空白期，建议避免接触其他动物，减少外出，直到完成疫苗接种。'
		}
		
		return {
			completenessAnalysis,
			timelinessAnalysis,
			recommendations,
			riskAssessment
		}
	}
}

export default new VaccineManager()