package com.zy.core.task;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.zy.asrs.entity.DeviceDataLog;
import com.zy.asrs.service.DeviceDataLogService;
import com.zy.common.utils.RedisUtil;
import com.zy.core.enums.RedisKeyType;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.text.SimpleDateFormat;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Set;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Component
public class DeviceLogScheduler {

    @Value("${deviceLogStorage.type}")
    private String storageType;
    @Value("${deviceLogStorage.loggingPath}")
    private String loggingPath;
    @Value("${deviceLogStorage.expireDays}")
    private Integer expireDays;
    @Autowired
    private DeviceDataLogService deviceDataLogService;
    @Autowired
    private RedisUtil redisUtil;

    @Scheduled(cron = "0/3 * * * * ? ")
    public void delDeviceLog() {
        if ("mysql".equals(storageType)) {
            deviceDataLogService.clearLog(expireDays == null ? 1 : expireDays);
        }else if ("file".equals(storageType)) {
            clearFileLog(expireDays == null ? 1 : expireDays);
        }else {
            log.error("未定义的存储类型：{}", storageType);
        }
    }

    @Scheduled(cron = "0/3 * * * * ? ")
    public void execute() {
        int maxCount = 100;
        Set<String> keys = redisUtil.scanKeys(RedisKeyType.DEVICE_LOG_KEY.key, maxCount);
        if (keys == null || keys.isEmpty()) {
            return;
        }
        List<Object> values = redisUtil.multiGet(keys);
        List<DeviceDataLog> list = new ArrayList<>();
        for (Object object : values) {
            if (object instanceof DeviceDataLog) {
                list.add((DeviceDataLog) object);
            }
        }
        if (!list.isEmpty()) {
            if ("mysql".equals(storageType)) {
                mysqlSave(keys, list);
            }else if ("file".equals(storageType)) {
                fileSave(keys, list);
            }else {
                log.error("未定义的存储类型：{}", storageType);
            }
        }
    }

    private void mysqlSave(Set<String> keys, List<DeviceDataLog> list) {
        if (deviceDataLogService.saveBatch(list)) {
            redisUtil.del(keys.toArray(new String[0]));
        }
    }

    private void fileSave(Set<String> keys, List<DeviceDataLog> list) {
        try {
            Path baseDir = Paths.get(loggingPath);
            Files.createDirectories(baseDir);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            Map<String, Map<String, List<DeviceDataLog>>> group = new HashMap<>();
            for (DeviceDataLog logItem : list) {
                String typeName = logItem.getType();
                String datePart = sdf.format(logItem.getCreateTime() == null ? new Date() : logItem.getCreateTime());
                String prefix = typeName + "_" + String.valueOf(logItem.getDeviceNo()) + "_" + datePart + "_";
                group.computeIfAbsent(datePart, k -> new HashMap<>())
                        .computeIfAbsent(prefix, k -> new ArrayList<>())
                        .add(logItem);
            }
            for (Map.Entry<String, Map<String, List<DeviceDataLog>>> dateEntry : group.entrySet()) {
                Path dayDir = baseDir.resolve(dateEntry.getKey());
                Files.createDirectories(dayDir);
                for (Map.Entry<String, List<DeviceDataLog>> entry : dateEntry.getValue().entrySet()) {
                    String prefix = entry.getKey();
                    List<DeviceDataLog> logs = entry.getValue();
                    logs.sort(Comparator.comparing(DeviceDataLog::getCreateTime, Comparator.nullsLast(Date::compareTo)));
                    int index = findStartIndex(dayDir, prefix);
                    Path current = dayDir.resolve(prefix + index + ".log");
                    if (!Files.exists(current)) {
                        Files.createFile(current);
                    }
                    long size = Files.size(current);
                    long max = 1024L * 1024L;
                    for (DeviceDataLog d : logs) {
                        String json = JSON.toJSONStringWithDateFormat(d, "yyyy-MM-dd HH:mm:ss.SSS", SerializerFeature.WriteDateUseDateFormat);
                        byte[] line = (json + System.lineSeparator()).getBytes(StandardCharsets.UTF_8);
                        if (size + line.length > max) {
                            index++;
                            current = dayDir.resolve(prefix + index + ".log");
                            Files.createFile(current);
                            size = 0;
                        }
                        Files.write(current, line, StandardOpenOption.CREATE, StandardOpenOption.APPEND);
                        size += line.length;
                    }
                }
            }
            redisUtil.del(keys.toArray(new String[0]));
        } catch (Exception e) {
            log.error("设备日志文件存储失败", e);
        }
    }

    private int findStartIndex(Path baseDir, String prefix) throws Exception {
        List<Path> matched = Files.list(baseDir)
                .filter(p -> {
                    String n = p.getFileName().toString();
                    return n.startsWith(prefix) && n.endsWith(".log");
                })
                .collect(Collectors.toList());
        int maxIdx = 0;
        for (Path p : matched) {
            String name = p.getFileName().toString();
            String suf = name.substring(prefix.length());
            if (!suf.isEmpty()) {
                try {
                    int val = Integer.parseInt(suf.replace(".log", ""));
                    if (val > maxIdx) {
                        maxIdx = val;
                    }
                } catch (NumberFormatException ignored) {}
            }
        }
        int candidate = maxIdx == 0 ? 1 : maxIdx;
        Path path = baseDir.resolve(prefix + candidate + ".log");
        if (Files.exists(path)) {
            long size = Files.size(path);
            if (size >= 1024L * 1024L) {
                return candidate + 1;
            }
        }
        return candidate;
    }

    private void clearFileLog(int days) {
        try {
            Path baseDir = Paths.get(loggingPath);
            if (!Files.exists(baseDir)) {
                return;
            }
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            long cutoff = System.currentTimeMillis() - (long) days * 24 * 60 * 60 * 1000;
            List<Path> dirs = Files.list(baseDir).filter(Files::isDirectory).collect(Collectors.toList());
            for (Path dir : dirs) {
                String name = dir.getFileName().toString();
                if (name.length() == 8 && name.chars().allMatch(Character::isDigit)) {
                    Date d = sdf.parse(name);
                    if (d.getTime() < cutoff) {
                        List<Path> all = Files.walk(dir).sorted(Comparator.reverseOrder()).collect(Collectors.toList());
                        for (Path p : all) {
                            try {
                                Files.deleteIfExists(p);
                            } catch (Exception ignored) {}
                        }
                    }
                }
            }
        } catch (Exception e) {
            log.error("设备日志文件清理失败", e);
        }
    }

}