package service

import (
	"errors"
	"testing"
	"time"

	"github.com/DATA-DOG/go-sqlmock"
	"github.com/wmms/wmms/internal/model"
)

func applicationHeadColumns() []string {
	return []string{"id", "organization_id", "user_id", "purpose", "status", "rejection_reason", "approved_by", "created_at", "updated_at", "username"}
}

func applicationItemColumns() []string {
	return []string{"id", "application_id", "material_id", "quantity", "material_code", "name"}
}

// 普通审批（不扣库存）沿用已有规则：只要求公司授权、状态待审和相关物料合法，公司没有
// 启用仓库也必须能审批，不能因为无法解析库存维度而返回 ErrInventoryScopeUnavailable。
// 这里只登记审批必需的查询；若代码解析仓库 scope，sqlmock 会因未预期语句失败。
func TestApproveWithoutAutoOutboundDoesNotRequireInventoryScope(t *testing.T) {
	mock := outboundMock(t)
	now := time.Now()
	mock.ExpectBegin()
	mock.ExpectQuery("SELECT a.id, a.organization_id, a.user_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationHeadColumns()).
			AddRow(1, 1, 2, "领用", model.ApplicationStatusPending, "", 0, now, now, "alice"))
	mock.ExpectQuery("SELECT ai.id, ai.application_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationItemColumns()).AddRow(11, 1, 7, 2, "M-1", "Material"))
	mock.ExpectExec("UPDATE material_applications SET status").WithArgs(model.ApplicationStatusApproved, int64(9), int64(1), int64(1), model.ApplicationStatusPending).WillReturnResult(sqlmock.NewResult(0, 1))
	mock.ExpectCommit()

	if err := NewApplicationService().Approve(1, 1, 9, false); err != nil {
		t.Fatalf("普通审批不应要求仓库配置，got %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

// 自动出库审批在同一事务内解析本公司 scope、条件扣减余额、创建带三维度的出库单和流水，
// 并带原状态条件改申请状态；所有 SQL 都必须带对组织与维度参数。
func TestApproveAutoOutboundWritesScopeAndDeductsStock(t *testing.T) {
	mock := outboundMock(t)
	now := time.Now()
	mock.ExpectBegin()
	mock.ExpectQuery("SELECT a.id, a.organization_id, a.user_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationHeadColumns()).
			AddRow(1, 1, 2, "领用", model.ApplicationStatusPending, "", 0, now, now, "alice"))
	mock.ExpectQuery("SELECT ai.id, ai.application_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationItemColumns()).AddRow(11, 1, 7, 2, "M-1", "Material"))
	// ResolveInventoryScope：公司 1 的启用仓库 10、库位 20。
	mock.ExpectQuery("SELECT w.id, w.organization_id").WithArgs(int64(1)).WillReturnRows(
		sqlmock.NewRows([]string{"id", "organization_id", "code", "name", "status", "location_id", "location_code", "location_name", "location_status"}).
			AddRow(10, 1, "W", "仓库", "active", 20, "L", "库位", "active"))
	mock.ExpectQuery("SELECT username FROM users").WithArgs(int64(9)).WillReturnRows(sqlmock.NewRows([]string{"username"}).AddRow("approver"))
	// 条件扣减带 scope 的三维度，余额不足会返回 0 行。
	mock.ExpectExec("UPDATE inventory_balances SET on_hand = on_hand").WithArgs("2", int64(1), int64(10), int64(20), int64(7), "2").WillReturnResult(sqlmock.NewResult(0, 1))
	// 出库单头表显式写入公司、仓库、库位。
	mock.ExpectExec("INSERT INTO outbound_orders").WithArgs(int64(1), int64(10), int64(20), sqlmock.AnyArg(), "approver", "approver", "alice", "").WillReturnResult(sqlmock.NewResult(5, 1))
	mock.ExpectExec("UPDATE outbound_orders SET outbound_no").WithArgs("OUT-00000005", int64(5)).WillReturnResult(sqlmock.NewResult(0, 1))
	mock.ExpectExec("INSERT INTO outbound_items").WithArgs(int64(5), int64(7), 2).WillReturnResult(sqlmock.NewResult(1, 1))
	// 库存流水显式写入三维度。
	mock.ExpectExec("INSERT INTO stock_logs").WithArgs(int64(1), int64(10), int64(20), int64(7), "out", 2, "application", int64(1)).WillReturnResult(sqlmock.NewResult(1, 1))
	mock.ExpectExec("UPDATE material_applications SET status").WithArgs(model.ApplicationStatusApproved, int64(9), int64(1), int64(1), model.ApplicationStatusPending).WillReturnResult(sqlmock.NewResult(0, 1))
	mock.ExpectCommit()

	if err := NewApplicationService().Approve(1, 1, 9, true); err != nil {
		t.Fatalf("自动出库审批失败: %v", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

// 自动出库遇到余额不足时，事务必须整体回滚：状态不落库、不出单、不生成流水。
func TestApproveAutoOutboundRollsBackWhenStockInsufficient(t *testing.T) {
	mock := outboundMock(t)
	now := time.Now()
	mock.ExpectBegin()
	mock.ExpectQuery("SELECT a.id, a.organization_id, a.user_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationHeadColumns()).
			AddRow(1, 1, 2, "领用", model.ApplicationStatusPending, "", 0, now, now, "alice"))
	mock.ExpectQuery("SELECT ai.id, ai.application_id").WithArgs(int64(1), int64(1)).WillReturnRows(
		sqlmock.NewRows(applicationItemColumns()).AddRow(11, 1, 7, 2, "M-1", "Material"))
	mock.ExpectQuery("SELECT w.id, w.organization_id").WithArgs(int64(1)).WillReturnRows(
		sqlmock.NewRows([]string{"id", "organization_id", "code", "name", "status", "location_id", "location_code", "location_name", "location_status"}).
			AddRow(10, 1, "W", "仓库", "active", 20, "L", "库位", "active"))
	mock.ExpectQuery("SELECT username FROM users").WithArgs(int64(9)).WillReturnRows(sqlmock.NewRows([]string{"username"}).AddRow("approver"))
	// 条件扣减影响 0 行：余额不存在或不足，必须整体回滚。
	mock.ExpectExec("UPDATE inventory_balances SET on_hand = on_hand").WithArgs("2", int64(1), int64(10), int64(20), int64(7), "2").WillReturnResult(sqlmock.NewResult(0, 0))
	mock.ExpectRollback()

	err := NewApplicationService().Approve(1, 1, 9, true)
	if !errors.Is(err, ErrInsufficientStock) {
		t.Fatalf("got %v, want ErrInsufficientStock", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}

// 别家公司的申请在锁定阶段命中空行，回 ErrApplicationNotFound，不解析 scope、不落任何单据。
func TestApproveCrossOrganizationReturnsNotFound(t *testing.T) {
	mock := outboundMock(t)
	mock.ExpectBegin()
	mock.ExpectQuery("SELECT a.id, a.organization_id, a.user_id").WithArgs(int64(9), int64(1)).WillReturnRows(sqlmock.NewRows(applicationHeadColumns()))
	mock.ExpectRollback()

	err := NewApplicationService().Approve(1, 9, 3, true)
	if !errors.Is(err, ErrApplicationNotFound) {
		t.Fatalf("got %v, want ErrApplicationNotFound", err)
	}
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Fatal(err)
	}
}