-- CreateEnum
CREATE TYPE "MilestoneStatus" AS ENUM ('open', 'reached', 'confirmed', 'billed');

-- CreateEnum
CREATE TYPE "BillingRecordKind" AS ENUM ('order_completion', 'milestone', 'daily_report');

-- CreateEnum
CREATE TYPE "BillingRecordStatus" AS ENUM ('open', 'billed', 'voided');

-- AlterTable
ALTER TABLE "material_usages" ADD COLUMN     "billing_record_id" TEXT;

-- AlterTable
ALTER TABLE "time_entries" ADD COLUMN     "billing_record_id" TEXT;

-- CreateTable
CREATE TABLE "work_order_milestones" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "work_order_id" TEXT NOT NULL,
    "title" TEXT NOT NULL,
    "description" TEXT,
    "sort_order" INTEGER NOT NULL DEFAULT 0,
    "status" "MilestoneStatus" NOT NULL DEFAULT 'open',
    "reached_by_id" TEXT,
    "reached_at" TIMESTAMP(3),
    "reached_note" TEXT,
    "confirmed_by_id" TEXT,
    "confirmed_at" TIMESTAMP(3),
    "rejected_by_id" TEXT,
    "rejected_at" TIMESTAMP(3),
    "rejection_reason" TEXT,
    "billing_record_id" TEXT,
    "created_by_id" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "deleted_at" TIMESTAMP(3),

    CONSTRAINT "work_order_milestones_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "billing_records" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "work_order_id" TEXT NOT NULL,
    "kind" "BillingRecordKind" NOT NULL,
    "milestone_id" TEXT,
    "report_id" TEXT,
    "period_from" TIMESTAMP(3) NOT NULL,
    "period_to" TIMESTAMP(3) NOT NULL,
    "status" "BillingRecordStatus" NOT NULL DEFAULT 'open',
    "snapshot" JSONB,
    "pdf_document_id" TEXT,
    "pdf_checksum" TEXT,
    "invoice_number" TEXT,
    "billed_by_id" TEXT,
    "billed_at" TIMESTAMP(3),
    "voided_by_id" TEXT,
    "voided_at" TIMESTAMP(3),
    "void_reason" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "billing_records_pkey" PRIMARY KEY ("id")
);

-- CreateIndex
CREATE INDEX "work_order_milestones_tenant_id_work_order_id_idx" ON "work_order_milestones"("tenant_id", "work_order_id");

-- CreateIndex
CREATE INDEX "work_order_milestones_tenant_id_status_idx" ON "work_order_milestones"("tenant_id", "status");

-- CreateIndex
CREATE INDEX "billing_records_tenant_id_status_created_at_idx" ON "billing_records"("tenant_id", "status", "created_at");

-- CreateIndex
CREATE INDEX "billing_records_tenant_id_work_order_id_idx" ON "billing_records"("tenant_id", "work_order_id");

-- CreateIndex
CREATE INDEX "material_usages_tenant_id_billing_record_id_idx" ON "material_usages"("tenant_id", "billing_record_id");

-- CreateIndex
CREATE INDEX "time_entries_tenant_id_billing_record_id_idx" ON "time_entries"("tenant_id", "billing_record_id");

-- AddForeignKey
ALTER TABLE "work_order_milestones" ADD CONSTRAINT "work_order_milestones_work_order_id_fkey" FOREIGN KEY ("work_order_id") REFERENCES "work_orders"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "billing_records" ADD CONSTRAINT "billing_records_work_order_id_fkey" FOREIGN KEY ("work_order_id") REFERENCES "work_orders"("id") ON DELETE CASCADE ON UPDATE CASCADE;


-- L14 Abrechnungsübersicht: Mandantentrennung (RLS) für die neuen Tabellen
SELECT enable_tenant_rls('work_order_milestones');
SELECT enable_tenant_rls('billing_records');

-- Höchstens ein nicht stornierter Abrechnungseintrag je Quelle (Stornierung legt einen neuen offenen Eintrag an)
CREATE UNIQUE INDEX "billing_records_order_completion_active_key" ON "billing_records"("tenant_id", "work_order_id") WHERE "kind" = 'order_completion' AND "status" <> 'voided';
CREATE UNIQUE INDEX "billing_records_milestone_active_key" ON "billing_records"("tenant_id", "milestone_id") WHERE "kind" = 'milestone' AND "status" <> 'voided';
CREATE UNIQUE INDEX "billing_records_daily_report_active_key" ON "billing_records"("tenant_id", "report_id") WHERE "kind" = 'daily_report' AND "status" <> 'voided';