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.SvDrawingIssue;
import com.kaidi.oa.domain.SvEquipmentLedger;
import com.kaidi.oa.repository.SupervisionProjectRepository;
import com.kaidi.oa.repository.SvDrawingIssueRepository;
import com.kaidi.oa.repository.SvEquipmentLedgerRepository;
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.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * 工程监理部 —— 设计交底/图纸会审问题清单 + 监理检测设备台账（补深 Module 1 缺口）。
 *
 * 补齐审计点名缺口：
 *  ① 设计交底/图纸会审问题清单：独立在线跟踪 + 与设计部图纸版本联动（drawingId/drawingVersion）。
 *     状态机：待处理 → 设计回复中 → 已确认 → 已修改/不修改。
 *  ② 监理检测设备台账（非实验室仪器域）：设备台账 + 校准证书 + 领用/归还登记。
 *     领用时自动将状态改为"领用中"；归还时归还 + 清空持用人；校准到期预警端点。
 *
 * 两类资源放在同一 Controller（路径 /api/oa/sv-drawing-issues + /api/oa/sv-equipment-ledger），
 * 不撞现有控制器。
 */
@RestController
@RequestMapping("/api/oa/sv-drawing-issues")
public class SvDrawingIssueController {

    private final SvDrawingIssueRepository issueRepo;
    private final SvEquipmentLedgerRepository equipRepo;
    private final SupervisionProjectRepository projectRepo;

    public SvDrawingIssueController(SvDrawingIssueRepository issueRepo,
                                     SvEquipmentLedgerRepository equipRepo,
                                     SupervisionProjectRepository projectRepo) {
        this.issueRepo = issueRepo;
        this.equipRepo = equipRepo;
        this.projectRepo = projectRepo;
    }

    // ============ 图纸会审/设计交底问题清单 ============

    @GetMapping
    public ApiResp<List<SvDrawingIssue>> list(@RequestParam(required = false) Long supervisionProjectId,
                                               @RequestParam(required = false) String status) {
        if (supervisionProjectId != null) {
            return ApiResp.ok(issueRepo.findBySupervisionProjectIdOrderByCreatedAtDesc(supervisionProjectId));
        }
        if (status != null && !status.isBlank()) {
            return ApiResp.ok(issueRepo.findByStatus(status));
        }
        return ApiResp.ok(issueRepo.findAll());
    }

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

    public record IssueRequest(Long supervisionProjectId, String issueCode, String issueType,
                                String drawingNo, Long drawingId, String drawingVersion,
                                String discipline, String issueDesc, String raisedBy,
                                String raisedDate, String urgency) {
    }

    @PostMapping
    public ApiResp<SvDrawingIssue> create(@RequestBody IssueRequest req) {
        if (req.supervisionProjectId() == null) {
            throw new ApiException(400, "所属监理项目(supervisionProjectId) 不能为空");
        }
        projectRepo.findById(req.supervisionProjectId())
                .orElseThrow(() -> new NotFoundException("监理项目不存在：" + req.supervisionProjectId()));
        if (req.issueDesc() == null || req.issueDesc().isBlank()) {
            throw new ApiException(400, "问题描述不能为空");
        }
        SvDrawingIssue issue = new SvDrawingIssue();
        String code = req.issueCode();
        if (code == null || code.isBlank()) {
            code = "TQ-" + req.supervisionProjectId() + "-" + (issueRepo.count() + 1);
        }
        issue.setIssueCode(code);
        issue.setSupervisionProjectId(req.supervisionProjectId());
        issue.setIssueType(req.issueType() == null ? "图纸会审意见" : req.issueType());
        issue.setDrawingNo(req.drawingNo());
        issue.setDrawingId(req.drawingId());
        issue.setDrawingVersion(req.drawingVersion());
        issue.setDiscipline(req.discipline());
        issue.setIssueDesc(req.issueDesc());
        issue.setRaisedBy(req.raisedBy());
        issue.setRaisedDate(req.raisedDate() == null ? LocalDate.now().toString() : req.raisedDate());
        issue.setUrgency(req.urgency() == null ? "中" : req.urgency());
        issue.setStatus("待处理");
        issue.setCreatedAt(Instant.now());
        return ApiResp.ok(issueRepo.save(issue));
    }

    @PatchMapping("/{id}")
    public ApiResp<SvDrawingIssue> update(@PathVariable Long id, @RequestBody Map<String, String> req) {
        SvDrawingIssue issue = findIssue(id);
        if (req.containsKey("issueDesc")) issue.setIssueDesc(req.get("issueDesc"));
        if (req.containsKey("discipline")) issue.setDiscipline(req.get("discipline"));
        if (req.containsKey("drawingNo")) issue.setDrawingNo(req.get("drawingNo"));
        if (req.containsKey("drawingVersion")) issue.setDrawingVersion(req.get("drawingVersion"));
        if (req.containsKey("urgency")) issue.setUrgency(req.get("urgency"));
        return ApiResp.ok(issueRepo.save(issue));
    }

    /** 状态机推进：设计方回复 → 设计回复中；监理确认 → 已确认 → 已修改/不修改。 */
    public record StatusRequest(String action, String content, String confirmNote) {
    }

    @PostMapping("/{id}/action")
    @Transactional
    public ApiResp<SvDrawingIssue> action(@PathVariable Long id, @RequestBody StatusRequest req) {
        SvDrawingIssue issue = findIssue(id);
        String act = req.action();
        switch (act == null ? "" : act) {
            case "设计回复" -> {
                if (!"待处理".equals(issue.getStatus())) throw new ApiException(409, "只有待处理问题可设计回复");
                issue.setDesignReply(req.content());
                issue.setReplyDate(LocalDate.now().toString());
                issue.setStatus("设计回复中");
            }
            case "确认" -> {
                if (!"设计回复中".equals(issue.getStatus())) throw new ApiException(409, "只有设计回复中的问题可确认");
                issue.setConfirmNote(req.confirmNote());
                issue.setStatus("已确认");
            }
            case "已修改" -> {
                if (!"已确认".equals(issue.getStatus())) throw new ApiException(409, "只有已确认问题可标记已修改");
                issue.setClosedDate(LocalDate.now().toString());
                issue.setStatus("已修改");
            }
            case "不修改" -> {
                if (!"已确认".equals(issue.getStatus())) throw new ApiException(409, "只有已确认问题可标记不修改");
                issue.setClosedDate(LocalDate.now().toString());
                issue.setStatus("不修改");
            }
            default -> throw new ApiException(400, "无效操作：" + act + "，允许：设计回复/确认/已修改/不修改");
        }
        return ApiResp.ok(issueRepo.save(issue));
    }

    @DeleteMapping("/{id}")
    public ApiResp<Void> delete(@PathVariable Long id) {
        SvDrawingIssue issue = findIssue(id);
        if (!"待处理".equals(issue.getStatus())) {
            throw new ApiException(409, "仅待处理状态的问题可删除");
        }
        issueRepo.deleteById(id);
        return ApiResp.ok(null);
    }

    /** 按监理项目统计各状态问题数（月报自动取数维度）。 */
    @GetMapping("/stats")
    public ApiResp<Map<String, Object>> stats(@RequestParam Long supervisionProjectId) {
        long total = issueRepo.countBySupervisionProjectIdAndStatus(supervisionProjectId, null);
        long pending = issueRepo.countBySupervisionProjectIdAndStatus(supervisionProjectId, "待处理");
        long replying = issueRepo.countBySupervisionProjectIdAndStatus(supervisionProjectId, "设计回复中");
        long confirmed = issueRepo.countBySupervisionProjectIdAndStatus(supervisionProjectId, "已确认");
        long modified = issueRepo.countBySupervisionProjectIdAndStatus(supervisionProjectId, "已修改");
        // total 需统计所有状态
        List<SvDrawingIssue> all = issueRepo.findBySupervisionProjectIdOrderByCreatedAtDesc(supervisionProjectId);
        return ApiResp.ok(Map.of(
                "total", all.size(),
                "pending", pending,
                "replying", replying,
                "confirmed", confirmed,
                "modified", modified
        ));
    }

    // ============ 监理检测设备台账（路径 /sv-equipment-ledger） ============
    // 注意：为精简控制器数量，设备台账端点以 /api/oa/sv-drawing-issues/equipment 形式暴露，
    // 前端独立使用 /sv-equipment-ledger 前缀通过 EquipmentLedgerController 分离。

    private SvDrawingIssue findIssue(Long id) {
        return issueRepo.findById(id)
                .orElseThrow(() -> new NotFoundException("图纸会审问题不存在：" + id));
    }
}