import { z } from "zod";
import * as agent from "./agent";
import * as assets from "./assets";
import { CapabilityDescriptor, KnownCapabilityId } from "./capability";
import { type ApiScope, CursorQuery, cursorPage, Id, IdParam } from "./common";
import * as content from "./content";
import * as execution from "./execution";
import * as identity from "./identity";
import * as instances from "./instances";
import * as ops from "./ops";
import * as organization from "./organization";
import * as policy from "./policy";
import { GlobalSettings, GlobalSettingsUpdate } from "./settings";
import * as sources from "./sources";

// 所有 REST 端点的路径常量与请求/响应 schema 汇总。
// path 相对 API_PREFIX,参数用 OpenAPI 风格 `{id}`(server 的 createRoute 直接使用);
// web 用 buildPath() 填参数。响应体统一套 apiResponse() 信封,这里的 response 是 data 部分。

export const API_PREFIX = "/api/v1";

export type HttpMethod = "get" | "post" | "patch" | "put" | "delete";

export interface EndpointDef {
  method: HttpMethod;
  path: string;
  scope: ApiScope;
  summary: string;
  params?: z.ZodObject;
  query?: z.ZodType;
  body?: z.ZodType;
  response: z.ZodType;
}

const ep = <E extends EndpointDef>(e: E): E => e;

/** 列表查询:游标分页 + 资源自有过滤 */
const listQuery = <S extends z.ZodRawShape>(filters: S) => CursorQuery.extend(filters);

/** 删除/无内容动作的响应 */
export const OkResult = z.object({ ok: z.literal(true) });

interface CrudSchemas {
  row: z.ZodType;
  create?: z.ZodType;
  update?: z.ZodType;
  filters?: z.ZodRawShape;
}

/** 标准资源端点:list / get / create / update / remove(按给出的 schema 决定是否生成) */
function crud<const B extends string>(
  base: B,
  name: string,
  s: CrudSchemas,
  scopes: { read: ApiScope; write: ApiScope },
) {
  const item = `${base}/{id}` as const;
  return {
    list: ep({
      method: "get",
      path: base,
      scope: scopes.read,
      summary: `${name}列表`,
      query: listQuery(s.filters ?? {}),
      response: cursorPage(s.row),
    }),
    get: ep({
      method: "get",
      path: item,
      scope: scopes.read,
      summary: `${name}详情`,
      params: IdParam,
      response: s.row,
    }),
    ...(s.create
      ? {
          create: ep({
            method: "post",
            path: base,
            scope: scopes.write,
            summary: `新建${name}`,
            body: s.create,
            response: s.row,
          }),
        }
      : {}),
    ...(s.update
      ? {
          update: ep({
            method: "patch",
            path: item,
            scope: scopes.write,
            summary: `修改${name}`,
            params: IdParam,
            body: s.update,
            response: s.row,
          }),
        }
      : {}),
  };
}

const R = { read: "read", write: "admin" } as const;

const del = (path: string, summary: string) =>
  ep({ method: "delete", path, scope: "admin", summary, params: IdParam, response: OkResult });

export const Api = {
  // ── 内容 / 身份 ──
  mediaEntities: {
    ...crud(
      "/media-entities",
      "作品",
      {
        row: content.MediaEntity,
        create: content.MediaEntityCreate,
        update: content.MediaEntityUpdate,
        filters: {
          kind: content.MediaKind.optional(),
          status: content.MediaEntityStatus.optional(),
          q: z.string().max(200).optional(),
        },
      },
      R,
    ),
    merge: ep({
      method: "post",
      path: "/media-entities/{id}/merge",
      scope: "admin",
      summary: "合并重复作品(保留旧 ID 跳转)",
      params: IdParam,
      body: z.object({ intoId: Id, reason: z.string().max(2000) }),
      response: content.MediaEntity,
    }),
  },
  contentUnits: crud(
    "/content-units",
    "内容单元",
    {
      row: content.ContentUnit,
      create: content.ContentUnitCreate,
      update: content.ContentUnitUpdate,
      filters: { mediaEntityId: Id.optional(), seasonNumber: z.coerce.number().int().optional() },
    },
    R,
  ),
  titleAliases: {
    ...crud(
      "/title-aliases",
      "别名",
      {
        row: content.TitleAlias,
        create: content.TitleAliasCreate,
        update: content.TitleAliasUpdate,
        filters: { mediaEntityId: Id.optional(), q: z.string().max(200).optional() },
      },
      R,
    ),
    remove: del("/title-aliases/{id}", "删除别名"),
  },
  externalIdentities: {
    ...crud(
      "/external-identities",
      "外部身份",
      {
        row: identity.ExternalIdentity,
        create: identity.ExternalIdentityCreate,
        update: identity.ExternalIdentityUpdate,
        filters: {
          mediaEntityId: Id.optional(),
          provider: z.string().optional(),
          status: identity.IdentityStatus.optional(),
        },
      },
      R,
    ),
    revisions: ep({
      method: "get",
      path: "/external-identities/{id}/revisions",
      scope: "read",
      summary: "身份修订历史",
      params: IdParam,
      response: z.object({ items: z.array(identity.IdentityRevision) }),
    }),
  },

  // ── 文件 ──
  mediaAssets: crud(
    "/media-assets",
    "资产",
    {
      row: assets.MediaAsset,
      update: assets.MediaAssetUpdate,
      filters: { mediaEntityId: Id.optional(), status: assets.AssetStatus.optional() },
    },
    R,
  ),
  assetUnitCoverage: crud(
    "/asset-unit-coverage",
    "资产覆盖",
    {
      row: assets.AssetUnitCoverage,
      create: assets.AssetUnitCoverageCreate,
      update: assets.AssetUnitCoverageUpdate,
      filters: { mediaAssetId: Id.optional(), contentUnitId: Id.optional() },
    },
    R,
  ),
  assetLocations: crud(
    "/asset-locations",
    "资产位置",
    {
      row: assets.AssetLocation,
      update: assets.AssetLocationUpdate,
      filters: { mediaAssetId: Id.optional(), status: assets.LocationStatus.optional() },
    },
    R,
  ),
  pathBindings: crud(
    "/path-bindings",
    "路径绑定",
    {
      row: assets.PathBinding,
      create: assets.PathBindingCreate,
      update: assets.PathBindingUpdate,
      filters: { mediaEntityId: Id.optional(), status: assets.BindingStatus.optional() },
    },
    R,
  ),

  // ── 实例 ──
  libraryRoots: crud(
    "/library-roots",
    "媒体库根",
    {
      row: instances.LibraryRoot,
      create: instances.LibraryRootCreate,
      update: instances.LibraryRootUpdate,
    },
    R,
  ),
  downloaderInstances: {
    ...crud(
      "/downloader-instances",
      "下载器实例",
      {
        row: instances.DownloaderInstance,
        create: instances.DownloaderInstanceCreate,
        update: instances.DownloaderInstanceUpdate,
      },
      R,
    ),
    test: ep({
      method: "post",
      path: "/downloader-instances/{id}/test",
      scope: "admin",
      summary: "测试下载器连接",
      params: IdParam,
      response: z.object({ ok: z.boolean(), version: z.string().nullable(), message: z.string().nullable() }),
    }),
  },
  mediaServerInstances: crud(
    "/media-server-instances",
    "媒体服务器实例",
    {
      row: instances.MediaServerInstance,
      create: instances.MediaServerInstanceCreate,
      update: instances.MediaServerInstanceUpdate,
    },
    R,
  ),
  pathMappings: {
    ...crud(
      "/path-mappings",
      "路径映射",
      {
        row: instances.PathMapping,
        create: instances.PathMappingCreate,
        update: instances.PathMappingUpdate,
      },
      R,
    ),
    verify: ep({
      method: "post",
      path: "/path-mappings/{id}/verify",
      scope: "admin",
      summary: "校验路径映射可读写与挂载健康",
      params: IdParam,
      response: instances.PathMapping,
    }),
    remove: del("/path-mappings/{id}", "删除路径映射"),
  },

  // ── 来源 ──
  sites: crud("/sites", "站点", { row: sources.Site, create: sources.SiteCreate, update: sources.SiteUpdate }, R),
  siteAccounts: crud(
    "/site-accounts",
    "站点账号",
    {
      row: sources.SiteAccount,
      create: sources.SiteAccountCreate,
      update: sources.SiteAccountUpdate,
      filters: { siteId: Id.optional() },
    },
    R,
  ),
  feedSources: {
    ...crud(
      "/feed-sources",
      "Feed",
      {
        row: sources.FeedSource,
        create: sources.FeedSourceCreate,
        update: sources.FeedSourceUpdate,
        filters: { siteId: Id.optional(), health: sources.FeedHealth.optional() },
      },
      R,
    ),
    fetchNow: ep({
      method: "post",
      path: "/feed-sources/{id}/fetch",
      scope: "admin",
      summary: "立即抓取(仍受站点限流)",
      params: IdParam,
      response: z.object({ taskId: Id }),
    }),
  },
  sourceReleases: crud(
    "/source-releases",
    "站点资源",
    {
      row: sources.SourceRelease,
      filters: {
        siteId: Id.optional(),
        mediaEntityId: Id.optional(),
        resolutionStatus: sources.ResolutionStatus.optional(),
        q: z.string().max(200).optional(),
      },
    },
    R,
  ),
  observations: crud(
    "/observations",
    "观察",
    {
      row: sources.Observation,
      filters: { feedId: Id.optional(), status: sources.ObservationStatus.optional() },
    },
    R,
  ),

  // ── 规则 ──
  subscriptions: crud(
    "/subscriptions",
    "订阅",
    {
      row: policy.Subscription,
      create: policy.SubscriptionCreate,
      update: policy.SubscriptionUpdate,
      filters: { status: policy.SubscriptionStatus.optional(), mediaEntityId: Id.optional() },
    },
    R,
  ),
  policyRevisions: {
    ...crud(
      "/policy-revisions",
      "策略版本",
      {
        row: policy.PolicyRevision,
        create: policy.PolicyRevisionCreate,
        update: policy.PolicyRevisionUpdate,
        filters: { policyKey: z.string().optional(), status: policy.PolicyStatus.optional() },
      },
      R,
    ),
    preview: ep({
      method: "post",
      path: "/policy-revisions/{id}/preview",
      scope: "read",
      summary: "历史回放预览",
      params: IdParam,
      response: policy.PolicyRevision,
    }),
    publish: ep({
      method: "post",
      path: "/policy-revisions/{id}/publish",
      scope: "admin",
      summary: "发布策略版本",
      params: IdParam,
      body: z.object({ expectedRevision: z.number().int().min(1) }),
      response: policy.PolicyRevision,
    }),
    rollback: ep({
      method: "post",
      path: "/policy-revisions/{id}/rollback",
      scope: "admin",
      summary: "回滚到该版本",
      params: IdParam,
      response: policy.PolicyRevision,
    }),
  },
  acquisitionSlots: crud(
    "/acquisition-slots",
    "收录目标",
    {
      row: policy.AcquisitionSlot,
      create: policy.AcquisitionSlotCreate,
      update: policy.AcquisitionSlotUpdate,
      filters: { mediaEntityId: Id.optional(), status: policy.SlotStatus.optional() },
    },
    R,
  ),
  preferenceTags: {
    ...crud(
      "/preference-tags",
      "偏好标签",
      {
        row: policy.PreferenceTag,
        create: policy.PreferenceTagCreate,
        update: policy.PreferenceTagUpdate,
        filters: { status: policy.PreferenceStatus.optional(), kind: policy.PreferenceKind.optional() },
      },
      R,
    ),
    /** 删除 = 标记 deleted + 写抑制记录 */
    remove: del("/preference-tags/{id}", "删除偏好标签(留抑制记录)"),
  },
  preferenceSuppressions: crud(
    "/preference-suppressions",
    "偏好抑制",
    {
      row: policy.PreferenceSuppression,
      create: policy.PreferenceSuppressionCreate,
      update: policy.PreferenceSuppressionUpdate,
      filters: { active: z.enum(["true", "false"]).optional() },
    },
    R,
  ),

  // ── 执行 ──
  tasks: {
    ...crud(
      "/tasks",
      "任务",
      {
        row: execution.Task,
        filters: {
          status: execution.TaskStatus.optional(),
          kind: execution.TaskKind.optional(),
          subjectId: Id.optional(),
        },
      },
      R,
    ),
    cancel: ep({
      method: "post",
      path: "/tasks/{id}/cancel",
      scope: "organize.execute",
      summary: "取消任务(停止未来步骤)",
      params: IdParam,
      body: execution.TaskCancelRequest,
      response: execution.Task,
    }),
    retry: ep({
      method: "post",
      path: "/tasks/{id}/retry",
      scope: "organize.execute",
      summary: "重试失败任务",
      params: IdParam,
      response: execution.Task,
    }),
    operations: ep({
      method: "get",
      path: "/tasks/{id}/operations",
      scope: "read",
      summary: "任务的操作账本(业务时间线)",
      params: IdParam,
      response: z.object({ items: z.array(execution.AssetOperation) }),
    }),
  },
  acquisitionPlans: crud(
    "/acquisition-plans",
    "下载计划",
    {
      row: execution.AcquisitionPlan,
      filters: { slotId: Id.optional(), status: execution.PlanStatus.optional() },
    },
    R,
  ),
  downloadTasks: {
    ...crud(
      "/download-tasks",
      "下载任务",
      {
        row: execution.DownloadTask,
        filters: {
          instanceId: Id.optional(),
          status: execution.DownloadStatus.optional(),
          managed: z.enum(["true", "false"]).optional(),
        },
      },
      R,
    ),
    pause: ep({
      method: "post",
      path: "/download-tasks/{id}/pause",
      scope: "organize.execute",
      summary: "暂停(记为用户暂停,阈值恢复不会自动恢复)",
      params: IdParam,
      response: execution.DownloadTask,
    }),
    resume: ep({
      method: "post",
      path: "/download-tasks/{id}/resume",
      scope: "organize.execute",
      summary: "恢复下载",
      params: IdParam,
      response: execution.DownloadTask,
    }),
  },

  // ── 人工 / AI ──
  decisions: {
    ...crud(
      "/decisions",
      "待处理事项",
      {
        row: agent.Decision,
        filters: { status: agent.DecisionStatus.optional(), kind: agent.DecisionKind.optional() },
      },
      R,
    ),
    resolve: ep({
      method: "post",
      path: "/decisions/{id}/resolve",
      scope: "organize.execute",
      summary: "处理待处理事项",
      params: IdParam,
      body: agent.DecisionResolveInput,
      response: agent.Decision,
    }),
  },
  approvals: crud(
    "/approvals",
    "审批",
    {
      row: agent.Approval,
      update: agent.ApprovalUpdate,
      filters: { status: agent.ApprovalStatus.optional(), planId: Id.optional() },
    },
    { read: "read", write: "organize.execute" },
  ),
  automationGrants: crud(
    "/automation-grants",
    "持续授权",
    {
      row: agent.AutomationGrant,
      create: agent.AutomationGrantCreate,
      update: agent.AutomationGrantUpdate,
      filters: { status: agent.GrantStatus.optional() },
    },
    R,
  ),
  agentRuns: {
    ...crud(
      "/agent-runs",
      "Agent 运行",
      {
        row: agent.AgentRun,
        create: agent.AgentRunCreate,
        filters: { status: agent.AgentRunStatus.optional(), taskId: Id.optional() },
      },
      { read: "read", write: "organize.execute" },
    ),
    cancel: ep({
      method: "post",
      path: "/agent-runs/{id}/cancel",
      scope: "organize.execute",
      summary: "取消 Agent 运行",
      params: IdParam,
      response: agent.AgentRun,
    }),
    message: ep({
      method: "post",
      path: "/agent-runs/{id}/messages",
      scope: "organize.execute",
      summary: "向运行中的会话追加用户消息(纠正/补充)",
      params: IdParam,
      body: z.object({ text: z.string().min(1).max(8000) }),
      response: agent.AgentRun,
    }),
  },
  artifacts: crud(
    "/artifacts",
    "产物",
    {
      row: agent.Artifact,
      filters: { agentRunId: Id.optional(), taskId: Id.optional(), kind: agent.ArtifactKind.optional() },
    },
    R,
  ),

  // ── 运维 ──
  reconcileRuns: crud(
    "/reconcile-runs",
    "校验运行",
    {
      row: ops.ReconcileRun,
      create: ops.ReconcileRunCreate,
      filters: { kind: ops.ReconcileKind.optional(), status: ops.ReconcileStatus.optional() },
    },
    R,
  ),
  serverMappings: crud(
    "/server-mappings",
    "库存映射",
    {
      row: ops.ServerMapping,
      update: ops.ServerMappingUpdate,
      filters: {
        mediaServerInstanceId: Id.optional(),
        mediaEntityId: Id.optional(),
        matchStatus: ops.ServerMatchStatus.optional(),
      },
    },
    R,
  ),
  apiKeys: {
    list: ep({
      method: "get",
      path: "/api-keys",
      scope: "admin",
      summary: "API Key 列表",
      query: CursorQuery,
      response: cursorPage(ops.ApiKey),
    }),
    create: ep({
      method: "post",
      path: "/api-keys",
      scope: "admin",
      summary: "新建 API Key(明文只返回一次)",
      body: ops.ApiKeyCreate,
      response: ops.ApiKeyCreated,
    }),
    update: ep({
      method: "patch",
      path: "/api-keys/{id}",
      scope: "admin",
      summary: "修改/撤销 API Key",
      params: IdParam,
      body: ops.ApiKeyUpdate,
      response: ops.ApiKey,
    }),
  },
  auditEvents: {
    list: ep({
      method: "get",
      path: "/audit-events",
      scope: "admin",
      summary: "审计事件",
      query: listQuery({
        targetType: z.string().optional(),
        targetId: z.string().optional(),
        action: z.string().optional(),
      }),
      response: cursorPage(ops.AuditEvent),
    }),
  },
  secrets: {
    list: ep({
      method: "get",
      path: "/secrets",
      scope: "admin",
      summary: "凭证元数据列表",
      query: CursorQuery,
      response: cursorPage(ops.Secret),
    }),
    create: ep({
      method: "post",
      path: "/secrets",
      scope: "admin",
      summary: "新建凭证(只写)",
      body: ops.SecretCreate,
      response: ops.Secret,
    }),
    update: ep({
      method: "patch",
      path: "/secrets/{id}",
      scope: "admin",
      summary: "轮换凭证",
      params: IdParam,
      body: ops.SecretUpdate,
      response: ops.Secret,
    }),
  },

  // ── 整理(公开合同) ──
  organization: {
    list: ep({
      method: "get",
      path: "/organization-records",
      scope: "organize.read",
      summary: "整理记录列表",
      query: organization.OrganizationListQuery,
      response: cursorPage(organization.PublicOrganizationRecord),
    }),
    get: ep({
      method: "get",
      path: "/organization-records/{id}",
      scope: "organize.read",
      summary: "整理记录详情(含逐文件结果)",
      params: IdParam,
      response: organization.PublicOrganizationRecord,
    }),
    changes: ep({
      method: "get",
      path: "/organization-records/changes",
      scope: "organize.read",
      summary: "按 changeSeq 增量读取(含既有记录状态更新)",
      query: organization.OrganizationChangesQuery,
      response: organization.OrganizationChangesResponse,
    }),
    create: ep({
      method: "post",
      path: "/organization-records",
      scope: "organize.execute",
      summary: "手动发起整理",
      body: organization.OrganizeRequest,
      response: organization.OrganizeAccepted,
    }),
  },

  // ── 能力 ──
  capabilities: {
    list: ep({
      method: "get",
      path: "/capabilities",
      scope: "read",
      summary: "能力注册中心描述",
      response: z.object({ items: z.array(CapabilityDescriptor) }),
    }),
    invoke: ep({
      method: "post",
      path: "/capabilities/{capabilityId}/invoke",
      scope: "read",
      summary: "调用能力(实际所需 scope 见描述符;服务端按能力再次鉴权)",
      params: z.object({ capabilityId: KnownCapabilityId }),
      body: z.object({ input: z.unknown(), preview: z.boolean().default(false) }),
      response: z.object({ output: z.unknown(), taskId: Id.nullable(), planId: Id.nullable() }),
    }),
  },

  // ── 设置 ──
  settings: {
    get: ep({ method: "get", path: "/settings", scope: "read", summary: "全局设置", response: GlobalSettings }),
    update: ep({
      method: "patch",
      path: "/settings",
      scope: "admin",
      summary: "修改全局设置",
      body: GlobalSettingsUpdate,
      response: GlobalSettings,
    }),
  },
} as const;

/** 用参数填充 `{name}` 路径占位,返回带 API_PREFIX 的完整路径 */
export function buildPath(path: string, params: Record<string, string> = {}): string {
  const filled = path.replace(/\{(\w+)\}/g, (_, k: string) => {
    const v = params[k];
    if (v === undefined) throw new Error(`缺少路径参数 ${k}`);
    return encodeURIComponent(v);
  });
  return `${API_PREFIX}${filled}`;
}

/** 扁平列出全部端点(生成 OpenAPI、权限表与测试用) */
export function listEndpoints(): EndpointDef[] {
  return Object.values(Api).flatMap((group) => Object.values(group) as EndpointDef[]);
}

export type EndpointBody<E extends EndpointDef> = E["body"] extends z.ZodType ? z.input<E["body"]> : never;
export type EndpointResponse<E extends EndpointDef> = z.infer<E["response"]>;