-- CreateEnum
CREATE TYPE "IndustryStatus" AS ENUM ('ACTIVE', 'DISABLED');

-- CreateEnum
CREATE TYPE "CustomerStatus" AS ENUM ('ACTIVE', 'PAUSED', 'ENDED');

-- CreateEnum
CREATE TYPE "CustomerFieldStatus" AS ENUM ('PENDING', 'ACTIVE', 'REJECTED', 'DISABLED');

-- CreateTable
CREATE TABLE "industries" (
    "id" CHAR(26) NOT NULL,
    "parent_id" CHAR(26),
    "level" INTEGER NOT NULL DEFAULT 1,
    "name" VARCHAR(64) NOT NULL,
    "sort_order" INTEGER NOT NULL DEFAULT 10,
    "status" "IndustryStatus" NOT NULL DEFAULT 'ACTIVE',
    "remark" VARCHAR(200) NOT NULL DEFAULT '',
    "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMPTZ(3) NOT NULL,

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

-- CreateTable
CREATE TABLE "customers" (
    "id" CHAR(26) NOT NULL,
    "industry_id" CHAR(26) NOT NULL,
    "name" VARCHAR(128) NOT NULL,
    "short_name" VARCHAR(32) NOT NULL,
    "status" "CustomerStatus" NOT NULL DEFAULT 'ACTIVE',
    "owner_user_id" CHAR(26) NOT NULL,
    "contact_name" VARCHAR(32),
    "contact_phone" VARCHAR(32),
    "preferences" JSONB NOT NULL DEFAULT '{}',
    "custom_fields" JSONB NOT NULL DEFAULT '[]',
    "remark" VARCHAR(500),
    "created_by" CHAR(26),
    "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMPTZ(3) NOT NULL,
    "deleted_at" TIMESTAMPTZ(3),

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

-- CreateTable
CREATE TABLE "customer_groups" (
    "id" CHAR(26) NOT NULL,
    "name" VARCHAR(64) NOT NULL,
    "description" VARCHAR(255) NOT NULL DEFAULT '',
    "created_by" CHAR(26),
    "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMPTZ(3) NOT NULL,

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

-- CreateTable
CREATE TABLE "customer_group_members" (
    "group_id" CHAR(26) NOT NULL,
    "customer_id" CHAR(26) NOT NULL,
    "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "customer_group_members_pkey" PRIMARY KEY ("group_id","customer_id")
);

-- CreateTable
CREATE TABLE "customer_fields" (
    "id" CHAR(26) NOT NULL,
    "customer_id" CHAR(26) NOT NULL,
    "name" VARCHAR(32) NOT NULL,
    "code" VARCHAR(32) NOT NULL,
    "type" VARCHAR(16) NOT NULL,
    "options" JSONB NOT NULL DEFAULT '[]',
    "purpose" VARCHAR(200) NOT NULL,
    "enters_generation" BOOLEAN NOT NULL DEFAULT false,
    "status" "CustomerFieldStatus" NOT NULL DEFAULT 'PENDING',
    "applicant_user_id" CHAR(26) NOT NULL,
    "approver_user_id" CHAR(26),
    "applied_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "approved_at" TIMESTAMPTZ(3),
    "reject_reason" VARCHAR(200),
    "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMPTZ(3) NOT NULL,

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

-- CreateIndex
CREATE INDEX "industries_parent_id_sort_order_idx" ON "industries"("parent_id", "sort_order");

-- CreateIndex
CREATE INDEX "industries_level_status_idx" ON "industries"("level", "status");

-- CreateIndex
CREATE INDEX "customers_owner_user_id_status_idx" ON "customers"("owner_user_id", "status");

-- CreateIndex
CREATE INDEX "customers_status_updated_at_idx" ON "customers"("status", "updated_at");

-- CreateIndex
CREATE INDEX "customers_deleted_at_idx" ON "customers"("deleted_at");

-- CreateIndex
CREATE UNIQUE INDEX "customers_industry_id_name_key" ON "customers"("industry_id", "name");

-- CreateIndex
CREATE UNIQUE INDEX "customer_groups_name_key" ON "customer_groups"("name");

-- CreateIndex
CREATE INDEX "customer_group_members_customer_id_idx" ON "customer_group_members"("customer_id");

-- CreateIndex
CREATE INDEX "customer_fields_status_applied_at_idx" ON "customer_fields"("status", "applied_at");

-- CreateIndex
CREATE INDEX "customer_fields_customer_id_status_idx" ON "customer_fields"("customer_id", "status");

-- CreateIndex
CREATE UNIQUE INDEX "customer_fields_customer_id_code_key" ON "customer_fields"("customer_id", "code");

-- AddForeignKey
ALTER TABLE "industries" ADD CONSTRAINT "industries_parent_id_fkey" FOREIGN KEY ("parent_id") REFERENCES "industries"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customers" ADD CONSTRAINT "customers_industry_id_fkey" FOREIGN KEY ("industry_id") REFERENCES "industries"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customers" ADD CONSTRAINT "customers_owner_user_id_fkey" FOREIGN KEY ("owner_user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customers" ADD CONSTRAINT "customers_created_by_fkey" FOREIGN KEY ("created_by") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customer_group_members" ADD CONSTRAINT "customer_group_members_group_id_fkey" FOREIGN KEY ("group_id") REFERENCES "customer_groups"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customer_group_members" ADD CONSTRAINT "customer_group_members_customer_id_fkey" FOREIGN KEY ("customer_id") REFERENCES "customers"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customer_fields" ADD CONSTRAINT "customer_fields_customer_id_fkey" FOREIGN KEY ("customer_id") REFERENCES "customers"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customer_fields" ADD CONSTRAINT "customer_fields_applicant_user_id_fkey" FOREIGN KEY ("applicant_user_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "customer_fields" ADD CONSTRAINT "customer_fields_approver_user_id_fkey" FOREIGN KEY ("approver_user_id") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- A3 / ADR-002：行业名称唯一性（一级全局唯一，二级同父唯一）与两级结构校验
CREATE UNIQUE INDEX "industries_root_name_key" ON "industries"("name") WHERE "parent_id" IS NULL;
CREATE UNIQUE INDEX "industries_child_name_key" ON "industries"("parent_id", "name") WHERE "parent_id" IS NOT NULL;

ALTER TABLE "industries"
  ADD CONSTRAINT "industries_level_check"
  CHECK (("parent_id" IS NULL AND "level" = 1) OR ("parent_id" IS NOT NULL AND "level" = 2));
ALTER TABLE "industries"
  ADD CONSTRAINT "industries_no_self_parent_check" CHECK ("id" <> "parent_id");