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.DesignChange;
import com.kaidi.oa.repository.DesignChangeRepository;
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.Instant;
import java.util.List;

/**
 * Design research center (设计研究中心) design changes. changeType is one of
 * 设计变更 / 技术核定 / 工程洽商; status is one of 申请 / 审批中 / 已实施 / 已驳回,
 * defaulting to 申请 on create.
 */
@RestController
@RequestMapping("/api/oa/design-changes")
public class DesignChangeController {

    private final DesignChangeRepository changeRepo;

    public DesignChangeController(DesignChangeRepository changeRepo) {
        this.changeRepo = changeRepo;
    }

    @GetMapping
    public ApiResp<List<DesignChange>> list(@RequestParam(required = false) String status) {
        List<DesignChange> list;
        if (status != null && !status.isBlank()) {
            list = changeRepo.findByStatus(status);
        } else {
            list = changeRepo.findAll();
        }
        return ApiResp.ok(list);
    }

    @GetMapping("/{id}")
    public ApiResp<DesignChange> get(@PathVariable Long id) {
        return ApiResp.ok(changeRepo.findById(id)
                .orElseThrow(() -> new NotFoundException("design change not found: " + id)));
    }

    public record CreateDesignChangeRequest(
            String docName, String projectName, String reason, String changeType,
            String impact, String status, String applicant) {
    }

    @PostMapping
    public ApiResp<DesignChange> create(@RequestBody CreateDesignChangeRequest req) {
        boolean noDocName = req.docName() == null || req.docName().isBlank();
        boolean noProjectName = req.projectName() == null || req.projectName().isBlank();
        if (noDocName && noProjectName) {
            throw new ApiException(400, "docName or projectName is required");
        }
        DesignChange c = new DesignChange();
        c.setDocName(req.docName());
        c.setProjectName(req.projectName());
        c.setReason(req.reason());
        c.setChangeType(req.changeType());
        c.setImpact(req.impact());
        c.setStatus(req.status() == null || req.status().isBlank() ? "申请" : req.status());
        c.setApplicant(req.applicant());
        c.setCreatedAt(Instant.now());
        return ApiResp.ok(changeRepo.save(c));
    }

    /** PUT /{id} -> 编辑设计变更; 只覆盖请求体里给出的字段。 */
    @PutMapping("/{id}")
    public ApiResp<DesignChange> update(@PathVariable Long id, @RequestBody CreateDesignChangeRequest req) {
        DesignChange c = changeRepo.findById(id)
                .orElseThrow(() -> new NotFoundException("design change not found: " + id));
        if (req.docName() != null) c.setDocName(req.docName());
        if (req.projectName() != null) c.setProjectName(req.projectName());
        if (req.reason() != null) c.setReason(req.reason());
        if (req.changeType() != null) c.setChangeType(req.changeType());
        if (req.impact() != null) c.setImpact(req.impact());
        if (req.status() != null && !req.status().isBlank()) c.setStatus(req.status());
        if (req.applicant() != null) c.setApplicant(req.applicant());
        return ApiResp.ok(changeRepo.save(c));
    }

    /** DELETE /{id} -> 删除设计变更。 */
    @DeleteMapping("/{id}")
    public ApiResp<Void> delete(@PathVariable Long id) {
        if (!changeRepo.existsById(id)) {
            throw new NotFoundException("design change not found: " + id);
        }
        changeRepo.deleteById(id);
        return ApiResp.ok(null);
    }
}