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.WmPromotion;
import com.kaidi.oa.repository.IpAssetRepository;
import com.kaidi.oa.repository.WmPromotionRepository;
import com.kaidi.oa.repository.WorkMethodRepository;
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;

/**
 * 工法/专利推广活动管理（工程管理中心·专利工法办，需求功能8·成果应用与推广）。
 * 补深审计 PARTIAL：新建年度推广计划与推广活动记录实体（宣贯会/作业指导书/技术交流等），
 * 关联工法/专利，记录参与人数/效果评估。
 * 端点：/api/oa/wm-promotions
 * activityType: 宣贯会 / 作业指导书 / 技术交流 / 培训 / 知识共享 / 其他。
 * status: 计划中 / 进行中 / 已完成 / 已取消。
 */
@RestController
@RequestMapping("/api/oa/wm-promotions")
public class WmPromotionController {

    private final WmPromotionRepository promotionRepo;
    private final WorkMethodRepository methodRepo;
    private final IpAssetRepository ipAssetRepo;

    private static final List<String> ACTIVITY_TYPES = List.of(
            "宣贯会", "作业指导书", "技术交流", "培训", "知识共享", "其他");
    private static final List<String> STATUSES = List.of("计划中", "进行中", "已完成", "已取消");

    public WmPromotionController(WmPromotionRepository promotionRepo,
                                 WorkMethodRepository methodRepo,
                                 IpAssetRepository ipAssetRepo) {
        this.promotionRepo = promotionRepo;
        this.methodRepo = methodRepo;
        this.ipAssetRepo = ipAssetRepo;
    }

    // ---------- 台账查询 ----------

    @GetMapping
    public ApiResp<List<WmPromotion>> list(@RequestParam(required = false) Integer year,
                                           @RequestParam(required = false) String status,
                                           @RequestParam(required = false) Long methodId,
                                           @RequestParam(required = false) Long ipAssetId) {
        if (methodId != null) return ApiResp.ok(promotionRepo.findByMethodId(methodId));
        if (ipAssetId != null) return ApiResp.ok(promotionRepo.findByIpAssetId(ipAssetId));
        if (year != null) return ApiResp.ok(promotionRepo.findByYear(year));
        if (status != null && !status.isBlank()) return ApiResp.ok(promotionRepo.findByStatus(status));
        return ApiResp.ok(promotionRepo.findAll());
    }

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

    // ---------- CRUD ----------

    public record PromotionRequest(String name, String activityType, Integer year,
                                   Long methodId, Long ipAssetId,
                                   String planDate, String location, String organizer, String owner,
                                   String remark) {
    }

    @PostMapping
    @Transactional
    public ApiResp<WmPromotion> create(@RequestBody PromotionRequest req) {
        if (req.name() == null || req.name().isBlank()) {
            throw new ApiException(400, "推广活动名称不能为空");
        }
        if (req.activityType() != null && !ACTIVITY_TYPES.contains(req.activityType())) {
            throw new ApiException(400, "未知活动类型，可选：" + String.join("/", ACTIVITY_TYPES));
        }
        WmPromotion p = new WmPromotion();
        applyEditable(p, req);
        p.setYear(req.year() == null ? LocalDate.now().getYear() : req.year());
        p.setStatus("计划中");
        p.setCreatedAt(Instant.now());
        p.setUpdatedAt(Instant.now());
        return ApiResp.ok(promotionRepo.save(p));
    }

    @PatchMapping("/{id}")
    @Transactional
    public ApiResp<WmPromotion> update(@PathVariable Long id, @RequestBody PromotionRequest req) {
        WmPromotion p = find(id);
        if ("已取消".equals(p.getStatus())) {
            throw new ApiException(409, "已取消的活动不可再编辑");
        }
        applyEditable(p, req);
        p.setUpdatedAt(Instant.now());
        return ApiResp.ok(promotionRepo.save(p));
    }

    public record CompleteRequest(String actualDate, Integer attendeeCount,
                                  String effectNote, String materials) {
    }

    /**
     * 完成推广活动：记录实际日期/参与人数/效果评估/推广材料，置 status=已完成。
     * （补深需求：「记录推广活动（时间、地点、参与人数、效果评估）」）
     */
    @PostMapping("/{id}/complete")
    @Transactional
    public ApiResp<WmPromotion> complete(@PathVariable Long id, @RequestBody CompleteRequest req) {
        WmPromotion p = find(id);
        if ("已取消".equals(p.getStatus()) || "已完成".equals(p.getStatus())) {
            throw new ApiException(409, "活动已处于终态（" + p.getStatus() + "），不可再操作");
        }
        p.setActualDate(req.actualDate() == null || req.actualDate().isBlank()
                ? LocalDate.now().toString() : req.actualDate());
        if (req.attendeeCount() != null) p.setAttendeeCount(req.attendeeCount());
        if (req.effectNote() != null) p.setEffectNote(req.effectNote());
        if (req.materials() != null) p.setMaterials(req.materials());
        p.setStatus("已完成");
        p.setUpdatedAt(Instant.now());
        return ApiResp.ok(promotionRepo.save(p));
    }

    @PostMapping("/{id}/cancel")
    @Transactional
    public ApiResp<WmPromotion> cancel(@PathVariable Long id) {
        WmPromotion p = find(id);
        if ("已完成".equals(p.getStatus())) {
            throw new ApiException(409, "已完成的活动不可取消");
        }
        p.setStatus("已取消");
        p.setUpdatedAt(Instant.now());
        return ApiResp.ok(promotionRepo.save(p));
    }

    @DeleteMapping("/{id}")
    @Transactional
    public ApiResp<Void> delete(@PathVariable Long id) {
        WmPromotion p = find(id);
        if ("已完成".equals(p.getStatus())) {
            throw new ApiException(409, "已完成的推广活动记录不可删除（存证）");
        }
        promotionRepo.deleteById(id);
        return ApiResp.ok(null);
    }

    // ---------- helpers ----------

    private WmPromotion find(Long id) {
        return promotionRepo.findById(id).orElseThrow(() -> new NotFoundException("推广活动不存在：" + id));
    }

    private void applyEditable(WmPromotion p, PromotionRequest req) {
        if (req.name() != null && !req.name().isBlank()) p.setName(req.name());
        if (req.activityType() != null) p.setActivityType(req.activityType());
        if (req.methodId() != null) {
            p.setMethodId(req.methodId());
            methodRepo.findById(req.methodId()).ifPresent(m -> p.setMethodName(m.getName()));
        }
        if (req.ipAssetId() != null) {
            p.setIpAssetId(req.ipAssetId());
            ipAssetRepo.findById(req.ipAssetId()).ifPresent(a -> p.setIpAssetName(a.getName()));
        }
        if (req.planDate() != null) p.setPlanDate(req.planDate());
        if (req.location() != null) p.setLocation(req.location());
        if (req.organizer() != null) p.setOrganizer(req.organizer());
        if (req.owner() != null) p.setOwner(req.owner());
        if (req.remark() != null) p.setRemark(req.remark());
    }
}