/**
 * DI 装配 —— `app/` 是**唯一组装层**(编码规范 §5.2)。
 * 只有这里能同时认识多个模块:new 出 adapter、注入 port、把用例接起来。
 *
 * 跨层协作一律经端口注入:`ledger` 要发数据事件 → 注入 `event` 的出口;
 * `event` 的三级消费下游(trigger L7 / message L2)在其**上**,同样经端口注入。
 */
import { Pool } from 'pg';
import { drizzle } from 'drizzle-orm/node-postgres';
import type { Db } from '@shared/db.ts';

import type { EventService, TriggerMatcher } from '@modules/event';
import { createEventService, createEventStore } from '@modules/event';
import type { LedgerService } from '@modules/ledger';
import { createDraftStore, createLedgerService, createLedgerStore, DRAFT_DDL } from '@modules/ledger';
import type { OrgService, InFlightWorkProbe } from '@modules/org';
import {
  createGrantRepository,
  createOrgService,
  createPositionRepository,
  createStaffRepository,
} from '@modules/org';
import type { LlmService, ModelGateway } from '@modules/llm';
import {
  createLlmInstanceRepository,
  createLlmService,
  createModelGateway,
  createProviderInvoker,
  createReplayStore,
} from '@modules/llm';
import type { MemoryService } from '@modules/memory';
import { createActivityMemoryStore, createMemoryService, createTaskMemoryStore } from '@modules/memory';
import type { ToolboxService, ToolHandler, ToolInvoker } from '@modules/toolbox';
import {
  createSchemaValidator,
  createToolInvoker,
  createToolRegistry,
  createToolReplayStore,
  createToolRuntime,
  createToolboxService,
} from '@modules/toolbox';
import type { MessageService } from '@modules/message';
import { createMessageRepository, createMessageService } from '@modules/message';
import type { ChannelService } from '@modules/channel';
import {
  createChannelRepository,
  createChannelService,
  createFileAttachmentArchive,
  createSimulatedMailTransport,
} from '@modules/channel';

import type { AppConfig } from './config.ts';
import { createIdGenerator, systemClock } from './runtime.ts';
import { createSecretBox, loadSecretKey } from './secret-box.ts';

export type Container = {
  readonly config: AppConfig;
  readonly pool: Pool;
  readonly db: Db;
  readonly org: OrgService;
  readonly ledger: LedgerService;
  readonly event: EventService;
  readonly llm: LlmService;
  readonly modelGateway: ModelGateway;
  readonly memory: MemoryService;
  readonly toolbox: ToolboxService;
  readonly toolInvoker: ToolInvoker;
  readonly message: MessageService;
  readonly channel: ChannelService;
  close(): Promise<void>;
};

/**
 * 在途工作探针 —— 停用前置检查要问的是 task(L6)与 human-tool(L3),二者随 M3/M4 落地。
 * 占位返回空集;M4 起接真实用例(docs/debt.md · M1-1)。
 */
const emptyInFlightProbe: InFlightWorkProbe = {
  openTasksOf: async () => [],
  openCardsOf: async () => [],
  openApprovalsOf: async () => [],
};

/** 触发器判定 —— trigger(L7)随 M5 落地,当下恒不命中(docs/debt.md · M1-1) */
const noTriggerMatcher: TriggerMatcher = { match: async () => [] };

/** S-FEEL 求值 —— @sfeel 随 M3 落地;在此之前监听只用类型 + 关联键过滤 */
const passthroughEvaluator = (): boolean => true;

/** 第一方工具实现 —— 由 app 注册进 ToolRuntime;活动只见调用契约 */
export const firstPartyToolHandlers = new Map<string, ToolHandler>();

export async function createContainer(config: AppConfig): Promise<Container> {
  const pool = new Pool({ connectionString: config.databaseUrl, max: 10 });
  const db = drizzle(pool);
  const ids = createIdGenerator();
  const secrets = createSecretBox(loadSecretKey());

  // 草稿层的建表:ledger schema 的唯一写者是 ledger adapter,DDL 在其出口给出
  await pool.query(DRAFT_DDL);

  const org = createOrgService({
    positions: createPositionRepository(db),
    staff: createStaffRepository(db),
    grants: createGrantRepository(db),
    inFlight: emptyInFlightProbe,
    ids,
  });

  // message 是 event 的 `MessageFallback` 实现面 —— event(L1)不反向依赖它,由此处注入
  const message = createMessageService({
    repo: createMessageRepository(db),
    org: {
      staffOfPosition: async (positionId) => {
        const { staff } = await org.listStaff();
        return staff.filter((s) => s.positionId === positionId).map((s) => ({ id: s.id }));
      },
      governanceStaff: async () => {
        const { staff } = await org.listStaff();
        const governing = await Promise.all(
          staff.map(async (s) => ({
            s,
            ok: await org.authorize(s.id, { kind: 'governance', function: 'task' }, 'govern'),
          })),
        );
        return governing.filter((g) => g.ok).map((g) => ({ id: g.s.id }));
      },
    },
    clock: systemClock,
    ids,
  });

  const event = createEventService({
    store: createEventStore(db, ids),
    clock: systemClock,
    ids,
    evaluate: passthroughEvaluator,
    triggers: noTriggerMatcher,
    messages: message,
  });

  const ledger = createLedgerService({
    store: createLedgerStore(pool),
    drafts: createDraftStore(pool),
    events: { publish: async (envelope) => void (await event.publish(envelope)) },
    clock: systemClock,
    ids,
  });

  const instances = createLlmInstanceRepository(db);
  const provider = createProviderInvoker();
  const llm = createLlmService({ instances, provider, secrets, clock: systemClock, ids });
  const modelGateway = createModelGateway({
    instances,
    provider,
    replay: createReplayStore(db),
    secrets,
    clock: systemClock,
    mode: 'live',
  });

  const memory = createMemoryService({
    tasks: createTaskMemoryStore(db),
    activities: createActivityMemoryStore(db),
    model: {
      // 系统用途模型:叙述性小结 / 汇报生成 / 蒸馏钩子 —— 计量入系统账,不占活动预算
      generate: async (input) => {
        const result = await modelGateway.generate({
          model: input.model,
          prompt: input.prompt,
          ...(input.outputSchema === undefined ? {} : { outputSchema: input.outputSchema }),
          label: 'system-use',
        });
        return { text: result.text, ...(result.object === undefined ? {} : { object: result.object }) };
      },
      systemModelName: async () => (await llm.systemUseBinding())?.name,
    },
    clock: systemClock,
    ids,
  });

  const toolRegistry = createToolRegistry(db);
  const toolRuntime = createToolRuntime(firstPartyToolHandlers);
  const schemas = createSchemaValidator();
  const toolbox = createToolboxService({
    registry: toolRegistry,
    runtime: toolRuntime,
    schemas,
    secrets,
    clock: systemClock,
  });
  const toolInvoker = createToolInvoker({
    registry: toolRegistry,
    runtime: toolRuntime,
    replay: createToolReplayStore(db),
    schemas,
    secrets,
    clock: systemClock,
    mode: 'live',
  });

  const channel = createChannelService({
    channels: createChannelRepository(db),
    events: {
      ingestInbound: (input) => event.ingestInbound(input),
      recordOutbound: (ref) => event.recordOutbound(ref),
    },
    ledger: { systemWrite: (input) => ledger.systemWrite(input) },
    mail: createSimulatedMailTransport(db, ids),
    archive: createFileAttachmentArchive(config.attachmentRoot),
    clock: systemClock,
    ids,
  });

  return {
    config,
    pool,
    db,
    org,
    ledger,
    event,
    llm,
    modelGateway,
    memory,
    toolbox,
    toolInvoker,
    message,
    channel,
    async close() {
      await pool.end();
    },
  };
}