import { relations, sql } from "drizzle-orm";
import {
  bigint,
  boolean,
  index,
  integer,
  jsonb,
  pgTable,
  primaryKey,
  text,
  timestamp,
  uniqueIndex,
  uuid,
  varchar,
} from "drizzle-orm/pg-core";

const timestamps = {
  createdAt: timestamp("created_at", { withTimezone: true })
    .defaultNow()
    .notNull(),
  updatedAt: timestamp("updated_at", { withTimezone: true })
    .defaultNow()
    .$onUpdate(() => new Date())
    .notNull(),
};

// Better Auth core tables. Application authorization still compares the
// verified session email with ADMIN_EMAIL at every protected boundary.
export const users = pgTable(
  "user",
  {
    id: text("id").primaryKey(),
    name: text("name").notNull(),
    email: text("email").notNull(),
    emailVerified: boolean("email_verified").default(false).notNull(),
    image: text("image"),
    ...timestamps,
  },
  (table) => [uniqueIndex("user_email_unique").on(table.email)],
);

export const sessions = pgTable(
  "session",
  {
    id: text("id").primaryKey(),
    expiresAt: timestamp("expires_at", { withTimezone: true }).notNull(),
    token: text("token").notNull(),
    ipAddress: text("ip_address"),
    userAgent: text("user_agent"),
    userId: text("user_id")
      .notNull()
      .references(() => users.id, { onDelete: "cascade" }),
    ...timestamps,
  },
  (table) => [
    uniqueIndex("session_token_unique").on(table.token),
    index("session_user_id_idx").on(table.userId),
  ],
);

export const accounts = pgTable(
  "account",
  {
    id: text("id").primaryKey(),
    issuer: text("issuer").notNull(),
    accountId: text("account_id").notNull(),
    providerId: text("provider_id").notNull(),
    userId: text("user_id")
      .notNull()
      .references(() => users.id, { onDelete: "cascade" }),
    accessToken: text("access_token"),
    refreshToken: text("refresh_token"),
    idToken: text("id_token"),
    accessTokenExpiresAt: timestamp("access_token_expires_at", {
      withTimezone: true,
    }),
    refreshTokenExpiresAt: timestamp("refresh_token_expires_at", {
      withTimezone: true,
    }),
    scope: text("scope"),
    password: text("password"),
    ...timestamps,
  },
  (table) => [
    uniqueIndex("account_issuer_unique").on(table.issuer, table.accountId),
    index("account_user_id_idx").on(table.userId),
  ],
);

export const verifications = pgTable(
  "verification",
  {
    id: text("id").primaryKey(),
    identifier: text("identifier").notNull(),
    value: text("value").notNull(),
    expiresAt: timestamp("expires_at", { withTimezone: true }).notNull(),
    ...timestamps,
  },
  (table) => [index("verification_identifier_idx").on(table.identifier)],
);

export const media = pgTable(
  "media",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    objectKey: text("object_key").notNull(),
    fileName: text("file_name").notNull(),
    mimeType: varchar("mime_type", { length: 64 }).notNull(),
    byteSize: bigint("byte_size", { mode: "number" }).notNull(),
    checksum: varchar("checksum", { length: 128 }),
    width: integer("width"),
    height: integer("height"),
    status: varchar("status", { length: 24 }).default("pending").notNull(),
    currentReferenceCount: integer("current_reference_count")
      .default(0)
      .notNull(),
    revisionReferenceCount: integer("revision_reference_count")
      .default(0)
      .notNull(),
    createdById: text("created_by_id").references(() => users.id, {
      onDelete: "set null",
    }),
    ...timestamps,
  },
  (table) => [
    uniqueIndex("media_object_key_unique").on(table.objectKey),
    index("media_visibility_idx").on(
      table.status,
      table.currentReferenceCount,
    ),
  ],
);

export const characters = pgTable(
  "character",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    slug: varchar("slug", { length: 120 }).notNull(),
    nameTh: text("name_th").notNull(),
    nameEn: text("name_en"),
    description: text("description"),
    portraitMediaId: uuid("portrait_media_id").references(() => media.id, {
      onDelete: "set null",
    }),
    element: varchar("element", { length: 48 }),
    role: varchar("role", { length: 80 }),
    rarity: integer("rarity"),
    sortOrder: integer("sort_order").default(0).notNull(),
    visible: boolean("visible").default(false).notNull(),
    ...timestamps,
  },
  (table) => [
    uniqueIndex("character_slug_unique").on(table.slug),
    index("character_directory_idx").on(table.visible, table.sortOrder),
  ],
);

export const pages = pgTable(
  "page",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    characterId: uuid("character_id")
      .notNull()
      .references(() => characters.id, { onDelete: "cascade" }),
    slug: varchar("slug", { length: 120 }).notNull(),
    title: text("title").notNull(),
    navOrder: integer("nav_order").default(0).notNull(),
    visible: boolean("visible").default(false).notNull(),
    publicNote: text("public_note"),
    version: integer("version").default(1).notNull(),
    ...timestamps,
  },
  (table) => [
    uniqueIndex("page_character_slug_unique").on(
      table.characterId,
      table.slug,
    ),
    index("page_navigation_idx").on(
      table.characterId,
      table.visible,
      table.navOrder,
    ),
  ],
);

export const blocks = pgTable(
  "block",
  {
    id: uuid("id").primaryKey(),
    pageId: uuid("page_id")
      .notNull()
      .references(() => pages.id, { onDelete: "cascade" }),
    type: varchar("type", { length: 64 }).notNull(),
    schemaVersion: integer("schema_version").default(1).notNull(),
    config: jsonb("config").$type<Record<string, unknown>>().notNull(),
    responsiveLayout: jsonb("responsive_layout")
      .$type<Record<string, unknown>>()
      .default({})
      .notNull(),
    sortOrder: integer("sort_order").default(0).notNull(),
    ...timestamps,
  },
  (table) => [index("block_page_order_idx").on(table.pageId, table.sortOrder)],
);

export const dataSources = pgTable(
  "data_source",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    name: text("name").notNull(),
    description: text("description"),
    fields: jsonb("fields").$type<unknown[]>().default([]).notNull(),
    currentVersion: integer("current_version").default(1).notNull(),
    ...timestamps,
  },
  (table) => [index("data_source_name_idx").on(table.name)],
);

export const dataSourceVersions = pgTable(
  "data_source_version",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    dataSourceId: uuid("data_source_id")
      .notNull()
      .references(() => dataSources.id, { onDelete: "cascade" }),
    version: integer("version").notNull(),
    rows: jsonb("rows").$type<unknown[]>().default([]).notNull(),
    evaluation: jsonb("evaluation").$type<Record<string, unknown>>(),
    createdById: text("created_by_id").references(() => users.id, {
      onDelete: "set null",
    }),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
  },
  (table) => [
    uniqueIndex("data_source_version_unique").on(
      table.dataSourceId,
      table.version,
    ),
  ],
);

export const pageDataSources = pgTable(
  "page_data_source",
  {
    pageId: uuid("page_id")
      .notNull()
      .references(() => pages.id, { onDelete: "cascade" }),
    dataSourceId: uuid("data_source_id")
      .notNull()
      .references(() => dataSources.id, { onDelete: "restrict" }),
    pinnedVersion: integer("pinned_version"),
  },
  (table) => [
    primaryKey({ columns: [table.pageId, table.dataSourceId] }),
    index("page_data_source_dependency_idx").on(table.dataSourceId),
  ],
);

export const templates = pgTable(
  "template",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    slug: varchar("slug", { length: 120 }).notNull(),
    name: text("name").notNull(),
    description: text("description"),
    category: varchar("category", { length: 64 }).notNull(),
    structure: jsonb("structure").$type<Record<string, unknown>>().notNull(),
    builtIn: boolean("built_in").default(false).notNull(),
    ...timestamps,
  },
  (table) => [uniqueIndex("template_slug_unique").on(table.slug)],
);

export const revisions = pgTable(
  "revision",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    pageId: uuid("page_id")
      .notNull()
      .references(() => pages.id, { onDelete: "cascade" }),
    pageVersion: integer("page_version").notNull(),
    kind: varchar("kind", { length: 24 }).notNull(),
    label: text("label"),
    authorId: text("author_id").references(() => users.id, {
      onDelete: "set null",
    }),
    sourceRevisionId: uuid("source_revision_id"),
    checkpointHour: timestamp("checkpoint_hour", { withTimezone: true }),
    snapshot: jsonb("snapshot").$type<Record<string, unknown>>().notNull(),
    dataSourceVersions: jsonb("data_source_versions")
      .$type<Record<string, number>>()
      .default({})
      .notNull(),
    mediaIds: jsonb("media_ids").$type<string[]>().default([]).notNull(),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
    expiresAt: timestamp("expires_at", { withTimezone: true }),
  },
  (table) => [
    index("revision_page_created_idx").on(table.pageId, table.createdAt),
    uniqueIndex("revision_checkpoint_hour_unique")
      .on(table.pageId, table.checkpointHour)
      .where(sql`${table.kind} = 'checkpoint'`),
  ],
);

export const publicSnapshots = pgTable(
  "public_snapshot",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    pageId: uuid("page_id")
      .notNull()
      .references(() => pages.id, { onDelete: "cascade" }),
    pageVersion: integer("page_version").notNull(),
    versionVector: jsonb("version_vector")
      .$type<Record<string, number>>()
      .default({})
      .notNull(),
    vectorHash: varchar("vector_hash", { length: 64 }).notNull(),
    dto: jsonb("dto").$type<Record<string, unknown>>().notNull(),
    visible: boolean("visible").default(false).notNull(),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
  },
  (table) => [
    uniqueIndex("public_snapshot_version_unique").on(
      table.pageId,
      table.pageVersion,
      table.vectorHash,
    ),
    index("public_snapshot_lookup_idx").on(
      table.pageId,
      table.visible,
      table.createdAt,
    ),
  ],
);

export const slugAliases = pgTable(
  "slug_alias",
  {
    id: uuid("id").defaultRandom().primaryKey(),
    kind: varchar("kind", { length: 24 }).notNull(),
    oldCharacterSlug: varchar("old_character_slug", { length: 120 }).notNull(),
    oldPageSlug: varchar("old_page_slug", { length: 120 }),
    targetCharacterId: uuid("target_character_id")
      .notNull()
      .references(() => characters.id, { onDelete: "cascade" }),
    targetPageId: uuid("target_page_id").references(() => pages.id, {
      onDelete: "cascade",
    }),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
  },
  (table) => [
    uniqueIndex("slug_alias_path_unique").on(
      table.oldCharacterSlug,
      table.oldPageSlug,
    ),
  ],
);

export const mediaReferences = pgTable(
  "media_reference",
  {
    mediaId: uuid("media_id")
      .notNull()
      .references(() => media.id, { onDelete: "cascade" }),
    ownerType: varchar("owner_type", { length: 24 }).notNull(),
    ownerId: uuid("owner_id").notNull(),
    referenceKind: varchar("reference_kind", { length: 24 }).notNull(),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
  },
  (table) => [
    primaryKey({
      columns: [
        table.mediaId,
        table.ownerType,
        table.ownerId,
        table.referenceKind,
      ],
    }),
    index("media_reference_owner_idx").on(table.ownerType, table.ownerId),
  ],
);

export const outboxEvents = pgTable(
  "outbox_event",
  {
    id: bigint("id", { mode: "number" })
      .primaryKey()
      .generatedAlwaysAsIdentity(),
    topic: varchar("topic", { length: 160 }).notNull(),
    aggregateId: uuid("aggregate_id").notNull(),
    eventType: varchar("event_type", { length: 64 }).notNull(),
    payload: jsonb("payload").$type<Record<string, unknown>>().notNull(),
    status: varchar("status", { length: 24 }).default("pending").notNull(),
    attempts: integer("attempts").default(0).notNull(),
    availableAt: timestamp("available_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
    processedAt: timestamp("processed_at", { withTimezone: true }),
    lastError: text("last_error"),
    createdAt: timestamp("created_at", { withTimezone: true })
      .defaultNow()
      .notNull(),
  },
  (table) => [
    index("outbox_pending_idx").on(
      table.status,
      table.availableAt,
      table.id,
    ),
  ],
);

export const characterRelations = relations(characters, ({ many, one }) => ({
  pages: many(pages),
  portrait: one(media, {
    fields: [characters.portraitMediaId],
    references: [media.id],
  }),
}));

export const pageRelations = relations(pages, ({ many, one }) => ({
  character: one(characters, {
    fields: [pages.characterId],
    references: [characters.id],
  }),
  blocks: many(blocks),
  dependencies: many(pageDataSources),
  revisions: many(revisions),
}));

export const blockRelations = relations(blocks, ({ one }) => ({
  page: one(pages, {
    fields: [blocks.pageId],
    references: [pages.id],
  }),
}));

export const dataSourceRelations = relations(dataSources, ({ many }) => ({
  versions: many(dataSourceVersions),
  pageDependencies: many(pageDataSources),
}));

export const dataSourceVersionRelations = relations(
  dataSourceVersions,
  ({ one }) => ({
    dataSource: one(dataSources, {
      fields: [dataSourceVersions.dataSourceId],
      references: [dataSources.id],
    }),
  }),
);