-- CreateEnum
CREATE TYPE "NodeType" AS ENUM ('task', 'event', 'note', 'project', 'goal');

-- CreateEnum
CREATE TYPE "NodeStatus" AS ENUM ('active', 'archived', 'deleted');

-- CreateEnum
CREATE TYPE "LinkType" AS ENUM ('references', 'blocks', 'relates_to', 'parent_of', 'child_of', 'scheduled_as', 'prepared_for');

-- CreateEnum
CREATE TYPE "WorkspaceRole" AS ENUM ('owner', 'admin', 'editor', 'viewer');

-- CreateEnum
CREATE TYPE "ReminderStatus" AS ENUM ('pending', 'sent', 'dismissed', 'snoozed');

-- CreateEnum
CREATE TYPE "NotificationType" AS ENUM ('push', 'email', 'sms', 'in_app');

-- CreateEnum
CREATE TYPE "ActionType" AS ENUM ('created', 'updated', 'deleted', 'viewed', 'shared', 'linked', 'completed', 'ai_assisted');

-- CreateTable
CREATE TABLE "users" (
    "id" UUID NOT NULL,
    "email" TEXT NOT NULL,
    "password_hash" TEXT NOT NULL,
    "display_name" TEXT NOT NULL,
    "avatar_url" VARCHAR,
    "preferences" JSONB NOT NULL DEFAULT '{}',
    "encryption_key" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "last_active_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "refresh_tokens" (
    "id" UUID NOT NULL,
    "token_hash" TEXT NOT NULL,
    "user_id" UUID NOT NULL,
    "expires_at" TIMESTAMP(3) NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "workspaces" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "slug" TEXT NOT NULL,
    "description" TEXT,
    "settings" JSONB NOT NULL DEFAULT '{}',
    "owner_id" UUID NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,

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

-- CreateTable
CREATE TABLE "nodes" (
    "id" UUID NOT NULL,
    "type" "NodeType" NOT NULL,
    "workspace_id" UUID NOT NULL,
    "owner_id" UUID NOT NULL,
    "parent_id" UUID,
    "title" TEXT NOT NULL,
    "content" JSONB NOT NULL DEFAULT '{}',
    "plain_text" TEXT NOT NULL DEFAULT '',
    "status" "NodeStatus" NOT NULL DEFAULT 'active',
    "priority" INTEGER,
    "start_time" TIMESTAMP(3),
    "end_time" TIMESTAMP(3),
    "duration_minutes" INTEGER,
    "recurrence_rule" TEXT,
    "completion_rate" DOUBLE PRECISION,
    "metadata" JSONB NOT NULL DEFAULT '{}',
    "version" INTEGER NOT NULL DEFAULT 1,
    "is_encrypted" BOOLEAN NOT NULL DEFAULT false,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "completed_at" TIMESTAMP(3),
    "archived_at" TIMESTAMP(3),

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

-- CreateTable
CREATE TABLE "node_links" (
    "id" UUID NOT NULL,
    "source_id" UUID NOT NULL,
    "target_id" UUID NOT NULL,
    "link_type" "LinkType" NOT NULL,
    "strength" DOUBLE PRECISION NOT NULL DEFAULT 0.5,
    "is_auto" BOOLEAN NOT NULL DEFAULT false,
    "context" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "tags" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "color" VARCHAR(7) NOT NULL,
    "workspace_id" UUID NOT NULL,
    "is_system" BOOLEAN NOT NULL DEFAULT false,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "node_tags" (
    "node_id" UUID NOT NULL,
    "tag_id" UUID NOT NULL,

    CONSTRAINT "node_tags_pkey" PRIMARY KEY ("node_id","tag_id")
);

-- CreateTable
CREATE TABLE "folders" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "workspace_id" UUID NOT NULL,
    "parent_id" UUID,
    "view_type" TEXT NOT NULL DEFAULT 'list',
    "filter_config" JSONB NOT NULL DEFAULT '{}',
    "sort_config" JSONB NOT NULL DEFAULT '{}',
    "order_index" INTEGER NOT NULL DEFAULT 0,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "reminders" (
    "id" UUID NOT NULL,
    "node_id" UUID NOT NULL,
    "user_id" UUID NOT NULL,
    "remind_at" TIMESTAMP(3) NOT NULL,
    "notification_type" "NotificationType" NOT NULL,
    "status" "ReminderStatus" NOT NULL DEFAULT 'pending',
    "snooze_until" TIMESTAMP(3),
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "embeddings" (
    "id" UUID NOT NULL,
    "node_id" UUID NOT NULL,
    "chunk_index" INTEGER NOT NULL,
    "chunk_text" TEXT NOT NULL,
    "vector" vector(1536) NOT NULL,
    "model_version" TEXT NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "activities" (
    "id" UUID NOT NULL,
    "user_id" UUID NOT NULL,
    "node_id" UUID,
    "workspace_id" UUID NOT NULL,
    "action_type" "ActionType" NOT NULL,
    "metadata" JSONB NOT NULL DEFAULT '{}',
    "session_id" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "attachments" (
    "id" UUID NOT NULL,
    "node_id" UUID NOT NULL,
    "filename" TEXT NOT NULL,
    "mime_type" TEXT NOT NULL,
    "size_bytes" INTEGER NOT NULL,
    "storage_key" TEXT NOT NULL,
    "thumbnail_key" TEXT,
    "uploaded_by" UUID NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "workspace_members" (
    "id" UUID NOT NULL,
    "workspace_id" UUID NOT NULL,
    "user_id" UUID NOT NULL,
    "role" "WorkspaceRole" NOT NULL,
    "permissions" JSONB NOT NULL DEFAULT '{}',
    "joined_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "last_accessed_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "sync_checkpoints" (
    "id" UUID NOT NULL,
    "user_id" UUID NOT NULL,
    "device_id" TEXT NOT NULL,
    "last_sync_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "sync_token" TEXT,
    "device_info" JSONB NOT NULL DEFAULT '{}',
    "updated_at" TIMESTAMP(3) NOT NULL,

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

-- CreateTable
CREATE TABLE "password_reset_tokens" (
    "id" UUID NOT NULL,
    "token_hash" TEXT NOT NULL,
    "user_id" UUID NOT NULL,
    "expires_at" TIMESTAMP(3) NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateIndex
CREATE UNIQUE INDEX "users_email_key" ON "users"("email");

-- CreateIndex
CREATE INDEX "refresh_tokens_user_id_idx" ON "refresh_tokens"("user_id");

-- CreateIndex
CREATE INDEX "refresh_tokens_token_hash_idx" ON "refresh_tokens"("token_hash");

-- CreateIndex
CREATE UNIQUE INDEX "workspaces_slug_owner_id_key" ON "workspaces"("slug", "owner_id");

-- CreateIndex
CREATE INDEX "nodes_type_status_workspace_id_owner_id_idx" ON "nodes"("type", "status", "workspace_id", "owner_id");

-- CreateIndex
CREATE INDEX "nodes_created_at_idx" ON "nodes"("created_at");

-- CreateIndex
CREATE INDEX "node_links_source_id_idx" ON "node_links"("source_id");

-- CreateIndex
CREATE INDEX "node_links_target_id_idx" ON "node_links"("target_id");

-- CreateIndex
CREATE UNIQUE INDEX "node_links_source_id_target_id_link_type_key" ON "node_links"("source_id", "target_id", "link_type");

-- CreateIndex
CREATE INDEX "embeddings_node_id_idx" ON "embeddings"("node_id");

-- CreateIndex
CREATE INDEX "activities_created_at_idx" ON "activities"("created_at");

-- CreateIndex
CREATE INDEX "activities_user_id_workspace_id_action_type_idx" ON "activities"("user_id", "workspace_id", "action_type");

-- CreateIndex
CREATE UNIQUE INDEX "workspace_members_workspace_id_user_id_key" ON "workspace_members"("workspace_id", "user_id");

-- CreateIndex
CREATE UNIQUE INDEX "sync_checkpoints_user_id_device_id_key" ON "sync_checkpoints"("user_id", "device_id");

-- CreateIndex
CREATE INDEX "password_reset_tokens_token_hash_idx" ON "password_reset_tokens"("token_hash");

-- AddForeignKey
ALTER TABLE "refresh_tokens" ADD CONSTRAINT "refresh_tokens_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "workspaces" ADD CONSTRAINT "workspaces_owner_id_fkey" FOREIGN KEY ("owner_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "nodes" ADD CONSTRAINT "nodes_workspace_id_fkey" FOREIGN KEY ("workspace_id") REFERENCES "workspaces"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "nodes" ADD CONSTRAINT "nodes_owner_id_fkey" FOREIGN KEY ("owner_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "nodes" ADD CONSTRAINT "nodes_parent_id_fkey" FOREIGN KEY ("parent_id") REFERENCES "nodes"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "node_links" ADD CONSTRAINT "node_links_source_id_fkey" FOREIGN KEY ("source_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "node_links" ADD CONSTRAINT "node_links_target_id_fkey" FOREIGN KEY ("target_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "tags" ADD CONSTRAINT "tags_workspace_id_fkey" FOREIGN KEY ("workspace_id") REFERENCES "workspaces"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "node_tags" ADD CONSTRAINT "node_tags_node_id_fkey" FOREIGN KEY ("node_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "node_tags" ADD CONSTRAINT "node_tags_tag_id_fkey" FOREIGN KEY ("tag_id") REFERENCES "tags"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "folders" ADD CONSTRAINT "folders_workspace_id_fkey" FOREIGN KEY ("workspace_id") REFERENCES "workspaces"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "folders" ADD CONSTRAINT "folders_parent_id_fkey" FOREIGN KEY ("parent_id") REFERENCES "folders"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "reminders" ADD CONSTRAINT "reminders_node_id_fkey" FOREIGN KEY ("node_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "reminders" ADD CONSTRAINT "reminders_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "embeddings" ADD CONSTRAINT "embeddings_node_id_fkey" FOREIGN KEY ("node_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "activities" ADD CONSTRAINT "activities_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "activities" ADD CONSTRAINT "activities_node_id_fkey" FOREIGN KEY ("node_id") REFERENCES "nodes"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "attachments" ADD CONSTRAINT "attachments_node_id_fkey" FOREIGN KEY ("node_id") REFERENCES "nodes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "workspace_members" ADD CONSTRAINT "workspace_members_workspace_id_fkey" FOREIGN KEY ("workspace_id") REFERENCES "workspaces"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "workspace_members" ADD CONSTRAINT "workspace_members_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "sync_checkpoints" ADD CONSTRAINT "sync_checkpoints_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;