package com.yunhai.flowcenter.controller.api;

import com.yunhai.flowcenter.service.FlowAdminGuard;
import com.yunhai.flowcenter.service.UserBaseDepartmentDirectory;
import com.yunhai.platform.openapi.base.model.DepartmentEntry;
import com.yunhai.platform.openapi.base.model.DepartmentGroup;
import com.yunhai.platform.openapi.base.model.DepartmentRef;
import com.yunhai.platform.utils.model.BoaUser;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;

/**
 * 部门目录读端点（C1/C4，2026-10-29）：流程编辑器"选择部门"、候选人预览与已存引用的名称回显
 * 统一以 UserBase 新部门目录为权威来源，不再读写 FL 本地科室。
 *
 * <p>校域一律由 {@link FlowAdminGuard#requireAdmin} 从 CAS 会话派生，前端没有可越界的 schId 入口；
 * 全部只读，不接受写操作，也不回落本地 {@code flw_dept}。</p>
 */
@RestController
@RequestMapping("/api/flow/admin/department")
@RequiredArgsConstructor
public class FlowDepartmentController {

    private final FlowAdminGuard adminGuard;
    private final UserBaseDepartmentDirectory directory;

    /** 第一级「部门组」：系统组织（SYSTEM）+ 该校自定义分类（CUSTOM） */
    @GetMapping("/groups")
    public List<DepartmentGroup> groups(BoaUser user) {
        return directory.groups(adminGuard.requireAdmin(user, null));
    }

    /**
     * 第二级可选部门。
     *
     * @param type         SYSTEM / CUSTOM（可空=两类都返回）
     * @param categoryId   仅 CUSTOM 有效
     * @param withChildren 仅 SYSTEM 有效，true 时扁平带回下级（前端按 parentId 重建层级）
     */
    @GetMapping("/options")
    public List<DepartmentEntry> options(BoaUser user,
                                         @RequestParam(value = "type", required = false) String type,
                                         @RequestParam(value = "categoryId", required = false) Integer categoryId,
                                         @RequestParam(value = "withChildren", required = false) Boolean withChildren) {
        return directory.options(adminGuard.requireAdmin(user, null), type, categoryId, withChildren);
    }

    /**
     * 已持久化引用的名称/状态回显（含停用与软删，走 UserBase 的 resolve-batch 历史口径）。
     * 编辑已有流程时用，避免"停用部门"在编辑器里显示成空白。
     */
    @GetMapping("/resolve")
    public List<DepartmentEntry> resolve(BoaUser user,
                                         @RequestParam(value = "type", required = false) String type,
                                         @RequestParam(value = "departmentId", required = false) Integer departmentId) {
        Long schId = adminGuard.requireAdmin(user, null);
        List<DepartmentRef> refs = new ArrayList<>();
        if (departmentId != null) {
            refs.add(new DepartmentRef(schId.intValue(), type, departmentId));
        }
        return directory.resolve(schId, refs);
    }

    /**
     * 部门成员预览（C4：只读预览，不是发起授权）。
     *
     * @param scope select（缺省，新指派严档）/ history（既有实例历史解析宽档）
     */
    @GetMapping("/members")
    public List<BoaUser> members(BoaUser user,
                                 @RequestParam("type") String type,
                                 @RequestParam("departmentId") Integer departmentId,
                                 @RequestParam(value = "scope", required = false) String scope) {
        Long school = adminGuard.requireAdmin(user, null);
        return directory.membersAtSchool(school, type, departmentId, scope);
    }
}