package com.kaidi.oa.web;

import com.kaidi.oa.common.ApiException;
import com.kaidi.oa.common.ApiResp;
import com.kaidi.oa.common.NotFoundException;
import com.kaidi.oa.domain.SvPersonalCert;
import com.kaidi.oa.repository.SvPersonalCertRepository;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.Instant;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 工程监理部 · 监理人员执业资格证书台账（补足 Gap 1：监理方自身执业证有效期预警）。
 *
 * CRUD + 到期预警查询（GET /expiring?days=30）：
 *   返回有效期在当前 + days 天内的证书列表，方便总监提前处理续期。
 * 状态自动判定：GET /expiring 同时自动将已过期证书 status 更新为「已过期」。
 *
 * 资源路径 /api/oa/sv-personal-certs。
 */
@RestController
@RequestMapping("/api/oa/sv-personal-certs")
public class SvPersonalCertController {

    private final SvPersonalCertRepository certRepo;

    public SvPersonalCertController(SvPersonalCertRepository certRepo) {
        this.certRepo = certRepo;
    }

    @GetMapping
    public ApiResp<List<SvPersonalCert>> list(
            @RequestParam(required = false) Long projectId,
            @RequestParam(required = false) String status,
            @RequestParam(required = false) String personName) {
        if (projectId != null) {
            return ApiResp.ok(certRepo.findBySupervisionProjectId(projectId));
        }
        if (status != null && !status.isBlank()) {
            return ApiResp.ok(certRepo.findByStatus(status));
        }
        if (personName != null && !personName.isBlank()) {
            return ApiResp.ok(certRepo.findByPersonName(personName));
        }
        return ApiResp.ok(certRepo.findAll());
    }

    @GetMapping("/{id}")
    public ApiResp<SvPersonalCert> get(@PathVariable Long id) {
        return ApiResp.ok(find(id));
    }

    /**
     * 到期预警查询：返回未来 days 天内到期的证书（默认 30 天），
     * 并同步把已过期的自动标记为「已过期」。
     */
    @GetMapping("/expiring")
    @Transactional
    public ApiResp<List<SvPersonalCert>> expiring(@RequestParam(defaultValue = "30") int days) {
        String today = LocalDate.now().format(DateTimeFormatter.ISO_LOCAL_DATE);
        String deadline = LocalDate.now().plusDays(days).format(DateTimeFormatter.ISO_LOCAL_DATE);
        // 自动更新已过期证书状态
        certRepo.findByExpiryDateLessThanEqual(today).stream()
                .filter(c -> !"已过期".equals(c.getStatus()) && !"已注销".equals(c.getStatus()))
                .forEach(c -> { c.setStatus("已过期"); certRepo.save(c); });
        // 返回 today <= expiryDate <= deadline 的有效证书（即将到期）
        List<SvPersonalCert> result = certRepo.findByExpiryDateLessThanEqual(deadline).stream()
                .filter(c -> c.getExpiryDate() != null && c.getExpiryDate().compareTo(today) >= 0)
                .collect(Collectors.toList());
        return ApiResp.ok(result);
    }

    public record CertRequest(
            Long supervisionProjectId, String personName, String roleType, String certType,
            String certNum, String issuingAuth, String issueDate, String expiryDate,
            String status, String remark) {
    }

    @PostMapping
    public ApiResp<SvPersonalCert> create(@RequestBody CertRequest req) {
        if (req.personName() == null || req.personName().isBlank()) {
            throw new ApiException(400, "人员姓名(personName) 不能为空");
        }
        if (req.expiryDate() == null || req.expiryDate().isBlank()) {
            throw new ApiException(400, "有效期至(expiryDate) 不能为空");
        }
        SvPersonalCert c = new SvPersonalCert();
        c.setSupervisionProjectId(req.supervisionProjectId());
        c.setPersonName(req.personName());
        c.setRoleType(req.roleType());
        c.setCertType(req.certType() == null || req.certType().isBlank() ? "注册监理工程师" : req.certType());
        c.setCertNum(req.certNum());
        c.setIssuingAuth(req.issuingAuth());
        c.setIssueDate(req.issueDate());
        c.setExpiryDate(req.expiryDate());
        // 自动判断有效/已过期
        String today = LocalDate.now().format(DateTimeFormatter.ISO_LOCAL_DATE);
        String statusVal = req.status() != null && !req.status().isBlank() ? req.status()
                : (req.expiryDate().compareTo(today) < 0 ? "已过期" : "有效");
        c.setStatus(statusVal);
        c.setRemark(req.remark());
        c.setCreatedAt(Instant.now());
        return ApiResp.ok(certRepo.save(c));
    }

    @PutMapping("/{id}")
    public ApiResp<SvPersonalCert> update(@PathVariable Long id, @RequestBody CertRequest req) {
        SvPersonalCert c = find(id);
        if (req.supervisionProjectId() != null) c.setSupervisionProjectId(req.supervisionProjectId());
        if (req.personName() != null && !req.personName().isBlank()) c.setPersonName(req.personName());
        if (req.roleType() != null) c.setRoleType(req.roleType());
        if (req.certType() != null && !req.certType().isBlank()) c.setCertType(req.certType());
        if (req.certNum() != null) c.setCertNum(req.certNum());
        if (req.issuingAuth() != null) c.setIssuingAuth(req.issuingAuth());
        if (req.issueDate() != null) c.setIssueDate(req.issueDate());
        if (req.expiryDate() != null && !req.expiryDate().isBlank()) {
            c.setExpiryDate(req.expiryDate());
            // 重算状态
            String today = LocalDate.now().format(DateTimeFormatter.ISO_LOCAL_DATE);
            if (!"已注销".equals(c.getStatus())) {
                c.setStatus(req.expiryDate().compareTo(today) < 0 ? "已过期" : "有效");
            }
        }
        if (req.status() != null && !req.status().isBlank()) c.setStatus(req.status());
        if (req.remark() != null) c.setRemark(req.remark());
        return ApiResp.ok(certRepo.save(c));
    }

    @DeleteMapping("/{id}")
    public ApiResp<Void> delete(@PathVariable Long id) {
        if (!certRepo.existsById(id)) {
            throw new NotFoundException("sv-personal-cert not found: " + id);
        }
        certRepo.deleteById(id);
        return ApiResp.ok(null);
    }

    private SvPersonalCert find(Long id) {
        return certRepo.findById(id)
                .orElseThrow(() -> new NotFoundException("sv-personal-cert not found: " + id));
    }
}