-- L16 Lotse-Chat für Monteure: Chatverlauf, Aktionsvorschläge, Schalter je Mandant

-- CreateEnum
CREATE TYPE "LotseMessageRole" AS ENUM ('user', 'assistant', 'tool');

-- CreateEnum
CREATE TYPE "LotseProposalStatus" AS ENUM ('proposed', 'confirmed', 'discarded', 'expired', 'failed');

-- AlterTable
ALTER TABLE "tenant_settings" ADD COLUMN     "lotse_chat_enabled" BOOLEAN NOT NULL DEFAULT true;

-- CreateTable
CREATE TABLE "lotse_conversations" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "user_id" TEXT NOT NULL,
    "work_order_id" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "last_message_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "lotse_messages" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "conversation_id" TEXT NOT NULL,
    "role" "LotseMessageRole" NOT NULL,
    "text" TEXT NOT NULL,
    "content" JSONB,
    "ai_generation_id" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "lotse_action_proposals" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "conversation_id" TEXT NOT NULL,
    "message_id" TEXT,
    "user_id" TEXT NOT NULL,
    "work_order_id" TEXT,
    "kind" TEXT NOT NULL,
    "payload" JSONB NOT NULL,
    "payload_hash" TEXT NOT NULL,
    "status" "LotseProposalStatus" NOT NULL DEFAULT 'proposed',
    "expires_at" TIMESTAMP(3) NOT NULL,
    "result" JSONB,
    "error_code" TEXT,
    "confirmed_at" TIMESTAMP(3),
    "confirmed_by_id" TEXT,
    "decided_at" TIMESTAMP(3),
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,

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

-- CreateIndex
CREATE INDEX "lotse_conversations_tenant_id_user_id_last_message_at_idx" ON "lotse_conversations"("tenant_id", "user_id", "last_message_at");

-- CreateIndex
CREATE INDEX "lotse_conversations_tenant_id_last_message_at_idx" ON "lotse_conversations"("tenant_id", "last_message_at");

-- CreateIndex
CREATE INDEX "lotse_messages_tenant_id_conversation_id_created_at_idx" ON "lotse_messages"("tenant_id", "conversation_id", "created_at");

-- CreateIndex
CREATE INDEX "lotse_action_proposals_tenant_id_conversation_id_created_at_idx" ON "lotse_action_proposals"("tenant_id", "conversation_id", "created_at");

-- CreateIndex
CREATE INDEX "lotse_action_proposals_tenant_id_user_id_status_idx" ON "lotse_action_proposals"("tenant_id", "user_id", "status");

-- AddForeignKey
ALTER TABLE "lotse_messages" ADD CONSTRAINT "lotse_messages_conversation_id_fkey" FOREIGN KEY ("conversation_id") REFERENCES "lotse_conversations"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "lotse_action_proposals" ADD CONSTRAINT "lotse_action_proposals_conversation_id_fkey" FOREIGN KEY ("conversation_id") REFERENCES "lotse_conversations"("id") ON DELETE CASCADE ON UPDATE CASCADE;


-- L16: Mandantentrennung (RLS) für die neuen Tabellen
SELECT enable_tenant_rls('lotse_conversations');
SELECT enable_tenant_rls('lotse_messages');
SELECT enable_tenant_rls('lotse_action_proposals');