import { NextRequest, NextResponse } from "next/server";
import { z } from "zod";
import { db } from "@/lib/db";
import { authSettings } from "@/lib/db/schema";
import { eq } from "drizzle-orm";
import { auth } from "@/app/(auth)/auth";

// GET /api/auth-settings - 获取认证配置
export async function GET() {
  try {
    const session = await auth();
    const isAdmin = session?.user?.type === "admin";

    const [settings] = await db.select().from(authSettings).limit(1);
    
    // 如果没有配置记录，返回默认值
    if (!settings) {
      return NextResponse.json({
        dingTalkAppKey: "",
        dingTalkAppSecret: "", // 即使是空的，非管理员也不应该看到这个字段名，但因为是空字符串，问题不大
        dingTalkOrganizations: [],
        isDingTalkEnabled: false,
        isRegistrationEnabled: true,
      });
    }
    
    if (isAdmin) {
      return NextResponse.json({
        ...settings,
        dingTalkOrganizations: settings.dingTalkOrganizations ?? [],
      });
    }

    // 非管理员，脱敏返回，只暴露组织名称
    const organizations =
      settings.dingTalkOrganizations?.map((org) => ({
        name: org.name,
      })) ?? [];

    return NextResponse.json({
      dingTalkAppKey: settings.dingTalkAppKey,
      isDingTalkEnabled: settings.isDingTalkEnabled,
      isRegistrationEnabled: settings.isRegistrationEnabled,
      organizations,
      // 不返回 dingTalkAppSecret 以及各组织的密钥
    });
  } catch (error) {
    console.error("[Auth Settings API] Get error:", error);
    return NextResponse.json(
      { error: "Failed to fetch auth settings" },
      { status: 500 }
    );
  }
}

const orgSchema = z.object({
  name: z.string().min(1),
  appKey: z.string().min(1),
  appSecret: z.string().min(1),
});

const updateSchema = z.object({
  dingTalkAppKey: z.string().optional(),
  dingTalkAppSecret: z.string().optional(),
  dingTalkOrganizations: z.array(orgSchema).optional(),
  isDingTalkEnabled: z.boolean().optional(),
  isRegistrationEnabled: z.boolean().optional(),
});

// PUT /api/auth-settings - 更新认证配置（仅管理员）
export async function PUT(request: NextRequest) {
  try {
    const session = await auth();
    
    if (!session?.user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }
    
    if (session.user.type !== "admin") {
      return NextResponse.json({ error: "Forbidden" }, { status: 403 });
    }
    
    const body = await request.json();
    const data = updateSchema.parse(body);
    
    // 查找现有配置
    const [existing] = await db.select().from(authSettings).limit(1);

    const organizations = data.dingTalkOrganizations ?? existing?.dingTalkOrganizations ?? [];
    const primaryOrg = organizations[0] as
      | { name: string; appKey: string; appSecret: string }
      | undefined;

    const resolvedAppKey =
      data.dingTalkAppKey ?? primaryOrg?.appKey ?? existing?.dingTalkAppKey ?? null;
    const resolvedAppSecret =
      data.dingTalkAppSecret ?? primaryOrg?.appSecret ?? existing?.dingTalkAppSecret ?? null;

    if (existing) {
      // 更新现有配置
      const [updated] = await db
        .update(authSettings)
        .set({
          dingTalkAppKey: resolvedAppKey,
          dingTalkAppSecret: resolvedAppSecret,
          dingTalkOrganizations: organizations,
          isDingTalkEnabled:
            data.isDingTalkEnabled ?? existing.isDingTalkEnabled,
          isRegistrationEnabled:
            data.isRegistrationEnabled ?? existing.isRegistrationEnabled,
          updatedAt: new Date(),
          updatedBy: session.user.id,
        })
        .where(eq(authSettings.id, existing.id))
        .returning();

      return NextResponse.json(updated);
    }

    // 创建新配置
    const [created] = await db
      .insert(authSettings)
      .values({
        dingTalkAppKey: resolvedAppKey,
        dingTalkAppSecret: resolvedAppSecret,
        dingTalkOrganizations: organizations,
        isDingTalkEnabled: data.isDingTalkEnabled || false,
        isRegistrationEnabled: data.isRegistrationEnabled ?? true,
        updatedBy: session.user.id,
      })
      .returning();

    return NextResponse.json(created);
  } catch (error) {
    console.error("[Auth Settings API] Update error:", error);
    
    if (error instanceof z.ZodError) {
      return NextResponse.json(
        { error: "Invalid request data", details: error.errors },
        { status: 400 }
      );
    }
    
    return NextResponse.json(
      { error: "Failed to update auth settings" },
      { status: 500 }
    );
  }
}