import { z } from "zod";
import { requireAdmin } from "@/lib/middleware/admin";
import {
  getAllSystemSettings,
  getSystemSetting,
  upsertSystemSetting,
} from "@/lib/db/queries";
import { ChatSDKError } from "@/lib/errors";
import { probeBflModelSupport } from "@/lib/realtime/bfl-capability";
import { probeFalModelSupport } from "@/lib/realtime/fal-capability";
import { probeReplicateModelSupport } from "@/lib/realtime/replicate-capability";
import {
  normalizeRealtimeCanvasConfigForStorage,
  resolveRealtimeProviders,
} from "@/lib/realtime/config";
import {
  DETAIL_AGENT_LOCAL_MOONSHOT_BASE_URL,
  DETAIL_AGENT_LOCAL_MOONSHOT_DISPLAY_NAME,
  DETAIL_AGENT_LOCAL_MOONSHOT_MODEL_ID,
  DETAIL_AGENT_LOCAL_MOONSHOT_SETTING_KEY,
} from "@/lib/ai/detail-agent-model-config";
import {
  normalizeProductPlanningApiConfig,
  PRODUCT_PLANNING_API_CONFIG_KEY,
} from "@/lib/product-planning/config";
import {
  normalizeProductPlanningAiModelConfig,
  PRODUCT_PLANNING_AI_MODEL_CONFIG_KEY,
} from "@/lib/product-planning/model-config";
import {
  normalizeThirdPartySqlServerConfig,
  THIRD_PARTY_SQLSERVER_CONFIG_KEY,
} from "@/lib/sqlserver/config";
import {
  ENHANCE_PRO_KREA_SETTING_KEY,
  normalizeEnhanceProKreaConfig,
} from "@/lib/enhance-pro/config";
import {
  normalizeWorldLabsKeyPoolConfig,
  WORLDLABS_KEY_POOL_CONFIG_KEY,
} from "@/lib/worldlabs/key-pool-config-shared";
import {
  normalizeThreeDModelAliasConfig,
  THREED_MODEL_ALIAS_CONFIG_SETTING_KEY,
} from "@/lib/model3d/model-alias-config";
import {
  normalizeVideoCanvasFunctionConfig,
  VIDEO_CANVAS_FUNCTION_CONFIG_KEY,
} from "@/lib/video-canvas/config";
import {
  CANVAS_IMAGE_TASK_QUEUE_CONFIG_KEY,
  normalizeCanvasImageTaskQueueConfig,
} from "@/lib/canvas/image-task-config";
import {
  DINGTALK_ROBOT_NOTIFICATION_CONFIG_KEY,
  normalizeDingTalkRobotNotificationConfig,
} from "@/lib/notifications/dingtalk-robot-config";
import {
  DINGTALK_NOTIFICATION_DRAFT_CONFIG_KEY,
  normalizeDingTalkNotificationDraftConfig,
} from "@/lib/notifications/dingtalk-notification-draft-config";

const settingSchema = z.object({
  key: z.string(),
  value: z.any(),
});

const moonshotDetailAgentConfigSchema = z.object({
  providerName: z.string().trim().min(1).max(128).optional(),
  baseUrl: z.string().trim().min(1),
  apiKey: z.string().optional(),
  modelId: z.string().trim().min(1).max(128).optional(),
  displayName: z.string().trim().min(1).max(128).optional(),
  isEnabled: z.boolean().optional(),
});

const MOONSHOT_OFFICIAL_BASE_URL = DETAIL_AGENT_LOCAL_MOONSHOT_BASE_URL;

function isMoonshotOfficialBaseUrl(value: string) {
  return String(value || "").trim().replace(/\/+$/, "") === MOONSHOT_OFFICIAL_BASE_URL;
}

function isObjectLike(value: unknown): value is Record<string, unknown> {
  return Boolean(value) && typeof value === "object" && !Array.isArray(value);
}

function mapProbeStatus(code: string) {
  if (code === "UPSTREAM_ERROR") return 502;
  return 400;
}

export async function GET(request: Request) {
  try {
    await requireAdmin();

    const { searchParams } = new URL(request.url);
    const key = searchParams.get("key");

    if (key) {
      const setting = await getSystemSetting({ key });
      if (key === CANVAS_IMAGE_TASK_QUEUE_CONFIG_KEY) {
        const value = normalizeCanvasImageTaskQueueConfig(setting?.value, {
          envConcurrency: process.env.CANVAS_IMAGE_TASK_CONCURRENCY,
        });
        return Response.json({
          setting: setting ? { ...setting, value } : { key, value },
        });
      }
      if (key === DINGTALK_ROBOT_NOTIFICATION_CONFIG_KEY) {
        const value = normalizeDingTalkRobotNotificationConfig(setting?.value);
        return Response.json({
          setting: setting ? { ...setting, value } : { key, value },
        });
      }
      if (key === DINGTALK_NOTIFICATION_DRAFT_CONFIG_KEY) {
        const value = normalizeDingTalkNotificationDraftConfig(setting?.value);
        return Response.json({
          setting: setting ? { ...setting, value } : { key, value },
        });
      }
      return Response.json({ setting });
    }

    const settings = await getAllSystemSettings();
    return Response.json({ settings });
  } catch (error) {
    if (error instanceof ChatSDKError) {
      return error.toResponse();
    }
    return new ChatSDKError("offline:admin").toResponse();
  }
}

export async function POST(request: Request) {
  try {
    const session = await requireAdmin();

    const body = await request.json();
    const { key, value } = settingSchema.parse(body);

    let nextValue = value;

    if (key === DETAIL_AGENT_LOCAL_MOONSHOT_SETTING_KEY) {
      const existingSetting = await getSystemSetting({
        key: DETAIL_AGENT_LOCAL_MOONSHOT_SETTING_KEY,
      }).catch(() => null);
      const existingValue =
        existingSetting?.value && typeof existingSetting.value === "object"
          ? (existingSetting.value as Record<string, unknown>)
          : {};
      const config = moonshotDetailAgentConfigSchema.parse(value || {});
      const normalizedBaseUrl = String(config.baseUrl || "").trim() || MOONSHOT_OFFICIAL_BASE_URL;
      const rawModelId = String(config.modelId || "").trim();
      const rawDisplayName = String(config.displayName || "").trim();
      const normalizedModelId =
        !rawModelId || rawModelId === "kimi-k2.5"
          ? DETAIL_AGENT_LOCAL_MOONSHOT_MODEL_ID
          : rawModelId;
      const normalizedDisplayName =
        !rawDisplayName || rawDisplayName === "官方 Kimi K2.5"
          ? DETAIL_AGENT_LOCAL_MOONSHOT_DISPLAY_NAME
          : rawDisplayName;
      const normalizedProviderName =
        String(config.providerName || "").trim() || "Moonshot AI (Official)";
      const normalizedApiKey =
        String(config.apiKey || "").trim() ||
        String(existingValue.apiKey || "").trim();
      const enabled = config.isEnabled !== false;

      if (!isMoonshotOfficialBaseUrl(normalizedBaseUrl)) {
        return new ChatSDKError(
          "bad_request:api",
          `Moonshot 官方地址必须为 ${MOONSHOT_OFFICIAL_BASE_URL}`,
        ).toResponse();
      }

      if (!normalizedApiKey) {
        return new ChatSDKError("bad_request:api", "缺少 Moonshot 官方 API Key").toResponse();
      }

      const saved = await upsertSystemSetting({
        key: DETAIL_AGENT_LOCAL_MOONSHOT_SETTING_KEY,
        value: {
          enabled,
          providerName: normalizedProviderName,
          baseUrl: normalizedBaseUrl,
          apiKey: normalizedApiKey,
          modelId: normalizedModelId,
          displayName: normalizedDisplayName,
        },
        updatedBy: session.user.id,
      });

      return Response.json({
        setting: saved[0],
      });
    }

    if (key === "realtime_canvas_config") {
      if (!isObjectLike(value)) {
        return new ChatSDKError("bad_request:api", "realtime_canvas_config value 必须为对象").toResponse();
      }

      const enabled = value.enabled !== false;
      const normalizedValue = normalizeRealtimeCanvasConfigForStorage(value);
      const providers = resolveRealtimeProviders(normalizedValue);

      if (enabled) {
        if (providers.length === 0) {
          return new ChatSDKError("bad_request:api", "启用实时画布必须至少配置一个可用服务").toResponse();
        }

        for (const provider of providers) {
          const probeResult =
            provider.type === "replicate"
              ? await probeReplicateModelSupport({
                  apiKey: provider.apiKey,
                  modelId: provider.model,
                  baseUrl: provider.baseUrl,
                })
              : provider.type === "fal"
                ? await probeFalModelSupport({
                    apiKey: provider.apiKey,
                    modelId: provider.model,
                  })
              : await probeBflModelSupport({
                  apiKey: provider.apiKey,
                  modelId: provider.model,
                  baseUrl: provider.baseUrl,
                });

          if (!probeResult.supported) {
            return Response.json(
              {
                code: probeResult.code,
                message: `${provider.label}校验失败：${probeResult.message}`,
              },
              { status: mapProbeStatus(probeResult.code) }
            );
          }
        }
      }

      nextValue = normalizedValue;
    }

    if (key === VIDEO_CANVAS_FUNCTION_CONFIG_KEY) {
      nextValue = normalizeVideoCanvasFunctionConfig(value);
    }

    if (key === CANVAS_IMAGE_TASK_QUEUE_CONFIG_KEY) {
      nextValue = normalizeCanvasImageTaskQueueConfig(value);
    }

    if (key === DINGTALK_ROBOT_NOTIFICATION_CONFIG_KEY) {
      nextValue = normalizeDingTalkRobotNotificationConfig(value);
    }

    if (key === DINGTALK_NOTIFICATION_DRAFT_CONFIG_KEY) {
      nextValue = normalizeDingTalkNotificationDraftConfig(value);
    }

    if (key === THIRD_PARTY_SQLSERVER_CONFIG_KEY) {
      const existingSetting = await getSystemSetting({
        key: THIRD_PARTY_SQLSERVER_CONFIG_KEY,
      }).catch(() => null);
      const existingValue =
        existingSetting?.value && typeof existingSetting.value === "object"
          ? (existingSetting.value as Record<string, unknown>)
          : {};
      const normalizedValue = normalizeThirdPartySqlServerConfig(
        value,
        String(existingValue.password || "").trim(),
      );

      if (normalizedValue.enabled) {
        if (!normalizedValue.host) {
          return new ChatSDKError("bad_request:api", "请填写 SQL Server 主机地址").toResponse();
        }
        if (!normalizedValue.database) {
          return new ChatSDKError("bad_request:api", "请填写数据库名称").toResponse();
        }
        if (!normalizedValue.username) {
          return new ChatSDKError("bad_request:api", "请填写数据库账号").toResponse();
        }
        if (!normalizedValue.password) {
          return new ChatSDKError("bad_request:api", "请填写数据库密码").toResponse();
        }
      }

      nextValue = normalizedValue;
    }

    if (key === PRODUCT_PLANNING_API_CONFIG_KEY) {
      const existingSetting = await getSystemSetting({
        key: PRODUCT_PLANNING_API_CONFIG_KEY,
      }).catch(() => null);
      const existingValue =
        existingSetting?.value && typeof existingSetting.value === "object"
          ? (existingSetting.value as Record<string, unknown>)
          : {};

      nextValue = normalizeProductPlanningApiConfig(value, {
        taobaoApiKey: String(existingValue.taobaoApiKey || "").trim(),
        taobaoApiSecret: String(existingValue.taobaoApiSecret || "").trim(),
        detailPlusApiKey: String(existingValue.detailPlusApiKey || "").trim(),
        qaToken: String(existingValue.qaToken || "").trim(),
        saleToken: String(existingValue.saleToken || "").trim(),
        planningDbPassword: String(existingValue.planningDbPassword || "").trim(),
      });
    }

    if (key === PRODUCT_PLANNING_AI_MODEL_CONFIG_KEY) {
      nextValue = normalizeProductPlanningAiModelConfig(value);
    }

    if (key === ENHANCE_PRO_KREA_SETTING_KEY) {
      const existingSetting = await getSystemSetting({
        key: ENHANCE_PRO_KREA_SETTING_KEY,
      }).catch(() => null);
      const existingValue =
        existingSetting?.value && typeof existingSetting.value === "object"
          ? (existingSetting.value as Record<string, unknown>)
          : {};
      const normalizedValue = normalizeEnhanceProKreaConfig(
        value,
        String(existingValue.apiKey || "").trim(),
      );

      if (normalizedValue.enabled) {
        if (!normalizedValue.baseUrl) {
          return new ChatSDKError("bad_request:api", "请填写 Krea API 地址").toResponse();
        }
        if (!normalizedValue.apiKey && normalizedValue.apiKeys.length === 0) {
          return new ChatSDKError("bad_request:api", "请填写 Krea API Key 或 Key 池").toResponse();
        }
      }

      nextValue = normalizedValue;
    }

    if (key === WORLDLABS_KEY_POOL_CONFIG_KEY) {
      nextValue = normalizeWorldLabsKeyPoolConfig(value);
    }

    if (key === THREED_MODEL_ALIAS_CONFIG_SETTING_KEY) {
      nextValue = normalizeThreeDModelAliasConfig(value);
    }

    const setting = await upsertSystemSetting({
      key,
      value: nextValue,
      updatedBy: session.user.id,
    });

    return Response.json({ setting: setting[0] });
  } catch (error) {
    if (error instanceof ChatSDKError) {
      return error.toResponse();
    }
    if (error instanceof z.ZodError) {
      return new ChatSDKError("bad_request:api", error.message).toResponse();
    }
    return new ChatSDKError("offline:admin").toResponse();
  }
}