import { Knex } from "knex";

export async function up(knex: Knex) {
    await knex.schema.createTable("schema_migration", (b) => {
        b.string("version");
        b.boolean("dirty");
    });

    await knex.schema.createTable("users", (b) => {
        b.string("username").primary().comment("user's login id");
        b.string("password_hash", 64).notNullable();
        b.string("password_salt", 64).notNullable();
    });
    await knex.schema.createTable("document", (b) => {
        b.increments("id").primary();
        b.string("title").notNullable();
        b.string("content_type", 16).notNullable();
        b.string("basepath", 256).notNullable().comment("directory path for resource");
        b.string("filename", 256).notNullable().comment("filename");
        b.string("content_hash").nullable();
        b.json("additional").nullable();
        b.integer("created_at").notNullable();
        b.integer("modified_at").notNullable();
        b.integer("deleted_at");
        b.index("content_type", "content_type_index");
    });
    await knex.schema.createTable("tags", (b) => {
        b.string("name").primary();
        b.text("description");
    });
    await knex.schema.createTable("doc_tag_relation", (b) => {
        b.integer("doc_id").unsigned().notNullable();
        b.string("tag_name").notNullable();
        b.foreign("doc_id").references("document.id");
        b.foreign("tag_name").references("tags.name");
        b.primary(["doc_id", "tag_name"]);
    });
    await knex.schema.createTable("permissions", b => {
        b.string("username").notNullable();
        b.string("name").notNullable();
        b.primary(["username", "name"]);
        b.foreign("username").references("users.username");
    });
    // create admin account.
    await knex.insert({
        username: "admin",
        password_hash: "unchecked",
        password_salt: "unchecked",
    }).into("users");
}

export async function down(knex: Knex) {
    throw new Error("Downward migrations are not supported. Restore from backup.");
}