package com.kaidi.oa.web;

import com.kaidi.oa.common.ApiException;
import com.kaidi.oa.common.ApiResp;
import com.kaidi.oa.common.Money;
import com.kaidi.oa.common.NotFoundException;
import com.kaidi.oa.domain.HrNonCompete;
import com.kaidi.oa.repository.HrNonCompeteRepository;
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.PatchMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
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.Instant;
import java.time.LocalDate;
import java.util.List;

/**
 * 员工竞业限制管理（法务合规·与其他部门接口）。
 * 专项管理员工竞业限制条款：签署登记、离职触发（状态推进到"离职-补偿中"）、到期确认、违约记录。
 * 含竞业补偿金（BigDecimal），不使用 double 裸算。
 * 含个人薪资信息，含 SENSITIVE_READ_PREFIXES 保护。
 */
@RestController
@RequestMapping("/api/oa/hr-non-compete")
public class HrNonCompeteController {

    private final HrNonCompeteRepository repo;

    public HrNonCompeteController(HrNonCompeteRepository repo) {
        this.repo = repo;
    }

    @GetMapping
    public ApiResp<List<HrNonCompete>> list(
            @RequestParam(required = false) String status,
            @RequestParam(required = false) String dept) {
        if (status != null && !status.isBlank()) {
            return ApiResp.ok(repo.findByStatus(status));
        }
        if (dept != null && !dept.isBlank()) {
            return ApiResp.ok(repo.findByDept(dept));
        }
        return ApiResp.ok(repo.findAll());
    }

    @GetMapping("/{id}")
    public ApiResp<HrNonCompete> get(@PathVariable Long id) {
        return ApiResp.ok(repo.findById(id)
                .orElseThrow(() -> new NotFoundException("竞业限制记录不存在: " + id)));
    }

    public record NonCompeteRequest(
            String employeeId, String employeeName, String dept, String position,
            Long laborContractId, Integer restrictionPeriod, String startDate, String endDate,
            Double compensationMonthly, String restrictedIndustries,
            String status, String violationNote, String signedDate) {
    }

    @PostMapping
    @Transactional
    public ApiResp<HrNonCompete> create(@RequestBody NonCompeteRequest req) {
        if (req.employeeName() == null || req.employeeName().isBlank()) {
            throw new ApiException(400, "员工姓名(employeeName) 不能为空");
        }
        HrNonCompete nc = new HrNonCompete();
        nc.setEmployeeId(req.employeeId());
        nc.setEmployeeName(req.employeeName());
        nc.setDept(req.dept());
        nc.setPosition(req.position());
        nc.setLaborContractId(req.laborContractId());
        nc.setRestrictionPeriod(req.restrictionPeriod());
        nc.setStartDate(req.startDate());
        nc.setEndDate(req.endDate());
        nc.setCompensationMonthly(Money.of(req.compensationMonthly()));
        nc.setRestrictedIndustries(req.restrictedIndustries());
        nc.setStatus(req.status() == null || req.status().isBlank() ? "在职-未触发" : req.status());
        nc.setViolationNote(req.violationNote());
        nc.setSignedDate(req.signedDate() == null || req.signedDate().isBlank()
                ? LocalDate.now().toString() : req.signedDate());
        nc.setCreatedAt(Instant.now());
        return ApiResp.ok(repo.save(nc));
    }

    @PatchMapping("/{id}")
    @Transactional
    public ApiResp<HrNonCompete> update(@PathVariable Long id, @RequestBody NonCompeteRequest req) {
        HrNonCompete nc = repo.findById(id)
                .orElseThrow(() -> new NotFoundException("竞业限制记录不存在: " + id));
        if (req.employeeName() != null && !req.employeeName().isBlank()) nc.setEmployeeName(req.employeeName());
        if (req.dept() != null) nc.setDept(req.dept());
        if (req.position() != null) nc.setPosition(req.position());
        if (req.restrictionPeriod() != null) nc.setRestrictionPeriod(req.restrictionPeriod());
        if (req.startDate() != null) nc.setStartDate(req.startDate());
        if (req.endDate() != null) nc.setEndDate(req.endDate());
        if (req.compensationMonthly() != null) nc.setCompensationMonthly(Money.of(req.compensationMonthly()));
        if (req.restrictedIndustries() != null) nc.setRestrictedIndustries(req.restrictedIndustries());
        if (req.status() != null && !req.status().isBlank()) nc.setStatus(req.status());
        if (req.violationNote() != null) nc.setViolationNote(req.violationNote());
        return ApiResp.ok(repo.save(nc));
    }

    @DeleteMapping("/{id}")
    @Transactional
    public ApiResp<Void> delete(@PathVariable Long id) {
        if (!repo.existsById(id)) {
            throw new NotFoundException("竞业限制记录不存在: " + id);
        }
        repo.deleteById(id);
        return ApiResp.ok(null);
    }

    // ---------- 离职触发（状态推进） ----------

    /**
     * 员工离职触发竞业限制：状态从「在职-未触发」推进到「离职-补偿中」，
     * 并设置限制起始日期。
     */
    @PostMapping("/{id}/trigger")
    @Transactional
    public ApiResp<HrNonCompete> trigger(@PathVariable Long id) {
        HrNonCompete nc = repo.findById(id)
                .orElseThrow(() -> new NotFoundException("竞业限制记录不存在: " + id));
        if (!"在职-未触发".equals(nc.getStatus())) {
            throw new ApiException(409, "只有「在职-未触发」状态可触发竞业限制");
        }
        nc.setStatus("离职-补偿中");
        String today = LocalDate.now().toString();
        if (nc.getStartDate() == null || nc.getStartDate().isBlank()) {
            nc.setStartDate(today);
            // 根据限制月数推算到期日
            if (nc.getRestrictionPeriod() != null && nc.getRestrictionPeriod() > 0) {
                LocalDate end = LocalDate.now().plusMonths(nc.getRestrictionPeriod());
                nc.setEndDate(end.toString());
            }
        }
        return ApiResp.ok(repo.save(nc));
    }

    // ---------- 违约记录 ----------

    public record ViolationReq(String violationNote) {
    }

    @PostMapping("/{id}/violate")
    @Transactional
    public ApiResp<HrNonCompete> violate(@PathVariable Long id, @RequestBody ViolationReq req) {
        HrNonCompete nc = repo.findById(id)
                .orElseThrow(() -> new NotFoundException("竞业限制记录不存在: " + id));
        if (req.violationNote() == null || req.violationNote().isBlank()) {
            throw new ApiException(400, "违约情况说明(violationNote) 不能为空");
        }
        nc.setViolationNote(req.violationNote());
        nc.setStatus("已违约");
        return ApiResp.ok(repo.save(nc));
    }

    // ---------- 到期确认 ----------

    @PostMapping("/{id}/expire")
    @Transactional
    public ApiResp<HrNonCompete> expire(@PathVariable Long id) {
        HrNonCompete nc = repo.findById(id)
                .orElseThrow(() -> new NotFoundException("竞业限制记录不存在: " + id));
        nc.setStatus("已到期");
        return ApiResp.ok(repo.save(nc));
    }

    // ---------- 近期到期预警（30 天内） ----------

    @GetMapping("/expiring-soon")
    public ApiResp<List<HrNonCompete>> expiringSoon() {
        String today = LocalDate.now().toString();
        String in30 = LocalDate.now().plusDays(30).toString();
        return ApiResp.ok(repo.findByStatus("离职-补偿中").stream()
                .filter(nc -> nc.getEndDate() != null
                        && nc.getEndDate().compareTo(today) >= 0
                        && nc.getEndDate().compareTo(in30) <= 0)
                .toList());
    }
}