import { MigrateUpArgs, MigrateDownArgs, sql } from '@payloadcms/db-postgres'

/**
 * Migration: Add BlogWoman Collections
 *
 * Creates:
 * - favorites table (Affiliate-Produkte)
 * - favorites_rels (relations to media)
 * - series table (YouTube-Serien)
 * - series_locales (localized fields)
 * - series_rels (relations to media)
 */
export async function up({ db, payload, req }: MigrateUpArgs): Promise<void> {
  await db.execute(sql`

  -- ============================================================
  -- ENUMS FOR FAVORITES
  -- ============================================================
  DO $$ BEGIN
    CREATE TYPE "public"."enum_favorites_category" AS ENUM('fashion', 'beauty', 'travel', 'tech', 'home');
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    CREATE TYPE "public"."enum_favorites_price_range" AS ENUM('budget', 'mid', 'premium', 'luxury');
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    CREATE TYPE "public"."enum_favorites_affiliate_network" AS ENUM('amazon', 'awin', 'ltk', 'direct', 'other');
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    CREATE TYPE "public"."enum_favorites_badge" AS ENUM('investment-piece', 'daily-driver', 'grfi-approved', 'new', 'bestseller');
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- ============================================================
  -- FAVORITES TABLE
  -- ============================================================
  CREATE TABLE IF NOT EXISTS "favorites" (
    "id" serial PRIMARY KEY NOT NULL,
    "tenant_id" integer,
    "title" varchar NOT NULL,
    "slug" varchar NOT NULL,
    "description" varchar,
    "category" "enum_favorites_category" NOT NULL,
    "subcategory" varchar,
    "price" numeric,
    "price_range" "enum_favorites_price_range",
    "affiliate_url" varchar NOT NULL,
    "affiliate_network" "enum_favorites_affiliate_network",
    "image_id" integer,
    "badge" "enum_favorites_badge",
    "featured" boolean DEFAULT false,
    "is_active" boolean NOT NULL DEFAULT true,
    "order" numeric DEFAULT 0,
    "updated_at" timestamp(3) with time zone DEFAULT now() NOT NULL,
    "created_at" timestamp(3) with time zone DEFAULT now() NOT NULL
  );

  -- Add unique constraint for slug
  DO $$ BEGIN
    ALTER TABLE "favorites" ADD CONSTRAINT "favorites_slug_idx" UNIQUE ("slug");
  EXCEPTION
    WHEN duplicate_table THEN null;
    WHEN duplicate_object THEN null;
  END $$;

  -- Foreign key for tenant
  DO $$ BEGIN
    ALTER TABLE "favorites" ADD CONSTRAINT "favorites_tenant_id_tenants_id_fk" FOREIGN KEY ("tenant_id") REFERENCES "public"."tenants"("id") ON DELETE set null ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- Foreign key for image
  DO $$ BEGIN
    ALTER TABLE "favorites" ADD CONSTRAINT "favorites_image_id_media_id_fk" FOREIGN KEY ("image_id") REFERENCES "public"."media"("id") ON DELETE set null ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- Indexes
  CREATE INDEX IF NOT EXISTS "favorites_tenant_idx" ON "favorites" USING btree ("tenant_id");
  CREATE INDEX IF NOT EXISTS "favorites_image_idx" ON "favorites" USING btree ("image_id");
  CREATE INDEX IF NOT EXISTS "favorites_created_at_idx" ON "favorites" USING btree ("created_at");

  -- ============================================================
  -- FAVORITES_RELS TABLE (for polymorphic relations)
  -- ============================================================
  CREATE TABLE IF NOT EXISTS "favorites_rels" (
    "id" serial PRIMARY KEY NOT NULL,
    "order" integer,
    "parent_id" integer NOT NULL,
    "path" varchar NOT NULL,
    "media_id" integer
  );

  DO $$ BEGIN
    ALTER TABLE "favorites_rels" ADD CONSTRAINT "favorites_rels_parent_fk" FOREIGN KEY ("parent_id") REFERENCES "public"."favorites"("id") ON DELETE cascade ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    ALTER TABLE "favorites_rels" ADD CONSTRAINT "favorites_rels_media_fk" FOREIGN KEY ("media_id") REFERENCES "public"."media"("id") ON DELETE cascade ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  CREATE INDEX IF NOT EXISTS "favorites_rels_order_idx" ON "favorites_rels" USING btree ("order");
  CREATE INDEX IF NOT EXISTS "favorites_rels_parent_idx" ON "favorites_rels" USING btree ("parent_id");
  CREATE INDEX IF NOT EXISTS "favorites_rels_path_idx" ON "favorites_rels" USING btree ("path");
  CREATE INDEX IF NOT EXISTS "favorites_rels_media_idx" ON "favorites_rels" USING btree ("media_id");

  -- ============================================================
  -- SERIES TABLE
  -- ============================================================
  CREATE TABLE IF NOT EXISTS "series" (
    "id" serial PRIMARY KEY NOT NULL,
    "tenant_id" integer,
    "slug" varchar NOT NULL,
    "logo_id" integer,
    "cover_image_id" integer,
    "brand_color" varchar,
    "accent_color" varchar,
    "youtube_playlist_id" varchar,
    "youtube_playlist_url" varchar,
    "order" numeric DEFAULT 0,
    "is_active" boolean NOT NULL DEFAULT true,
    "updated_at" timestamp(3) with time zone DEFAULT now() NOT NULL,
    "created_at" timestamp(3) with time zone DEFAULT now() NOT NULL
  );

  -- Add unique constraint for slug
  DO $$ BEGIN
    ALTER TABLE "series" ADD CONSTRAINT "series_slug_idx" UNIQUE ("slug");
  EXCEPTION
    WHEN duplicate_table THEN null;
    WHEN duplicate_object THEN null;
  END $$;

  -- Foreign keys
  DO $$ BEGIN
    ALTER TABLE "series" ADD CONSTRAINT "series_tenant_id_tenants_id_fk" FOREIGN KEY ("tenant_id") REFERENCES "public"."tenants"("id") ON DELETE set null ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    ALTER TABLE "series" ADD CONSTRAINT "series_logo_id_media_id_fk" FOREIGN KEY ("logo_id") REFERENCES "public"."media"("id") ON DELETE set null ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    ALTER TABLE "series" ADD CONSTRAINT "series_cover_image_id_media_id_fk" FOREIGN KEY ("cover_image_id") REFERENCES "public"."media"("id") ON DELETE set null ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- Indexes
  CREATE INDEX IF NOT EXISTS "series_tenant_idx" ON "series" USING btree ("tenant_id");
  CREATE INDEX IF NOT EXISTS "series_logo_idx" ON "series" USING btree ("logo_id");
  CREATE INDEX IF NOT EXISTS "series_cover_image_idx" ON "series" USING btree ("cover_image_id");
  CREATE INDEX IF NOT EXISTS "series_created_at_idx" ON "series" USING btree ("created_at");

  -- ============================================================
  -- SERIES_LOCALES TABLE (for localized fields)
  -- ============================================================
  CREATE TABLE IF NOT EXISTS "series_locales" (
    "title" varchar NOT NULL,
    "tagline" varchar,
    "description" jsonb,
    "id" serial PRIMARY KEY NOT NULL,
    "_locale" "_locales" NOT NULL,
    "_parent_id" integer NOT NULL
  );

  DO $$ BEGIN
    ALTER TABLE "series_locales" ADD CONSTRAINT "series_locales_parent_id_fk" FOREIGN KEY ("_parent_id") REFERENCES "public"."series"("id") ON DELETE cascade ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- Unique constraint for parent + locale combination
  DO $$ BEGIN
    ALTER TABLE "series_locales" ADD CONSTRAINT "series_locales_locale_parent_id_unique" UNIQUE ("_locale", "_parent_id");
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  -- ============================================================
  -- SERIES_RELS TABLE (for polymorphic relations)
  -- ============================================================
  CREATE TABLE IF NOT EXISTS "series_rels" (
    "id" serial PRIMARY KEY NOT NULL,
    "order" integer,
    "parent_id" integer NOT NULL,
    "path" varchar NOT NULL,
    "media_id" integer
  );

  DO $$ BEGIN
    ALTER TABLE "series_rels" ADD CONSTRAINT "series_rels_parent_fk" FOREIGN KEY ("parent_id") REFERENCES "public"."series"("id") ON DELETE cascade ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  DO $$ BEGIN
    ALTER TABLE "series_rels" ADD CONSTRAINT "series_rels_media_fk" FOREIGN KEY ("media_id") REFERENCES "public"."media"("id") ON DELETE cascade ON UPDATE no action;
  EXCEPTION
    WHEN duplicate_object THEN null;
  END $$;

  CREATE INDEX IF NOT EXISTS "series_rels_order_idx" ON "series_rels" USING btree ("order");
  CREATE INDEX IF NOT EXISTS "series_rels_parent_idx" ON "series_rels" USING btree ("parent_id");
  CREATE INDEX IF NOT EXISTS "series_rels_path_idx" ON "series_rels" USING btree ("path");
  CREATE INDEX IF NOT EXISTS "series_rels_media_idx" ON "series_rels" USING btree ("media_id");

  `)
}

export async function down({ db, payload, req }: MigrateDownArgs): Promise<void> {
  await db.execute(sql`

  -- Drop tables in reverse order of dependencies
  DROP TABLE IF EXISTS "series_rels";
  DROP TABLE IF EXISTS "series_locales";
  DROP TABLE IF EXISTS "series";
  DROP TABLE IF EXISTS "favorites_rels";
  DROP TABLE IF EXISTS "favorites";

  -- Drop enums
  DROP TYPE IF EXISTS "enum_favorites_category";
  DROP TYPE IF EXISTS "enum_favorites_price_range";
  DROP TYPE IF EXISTS "enum_favorites_affiliate_network";
  DROP TYPE IF EXISTS "enum_favorites_badge";

  `)
}