package service

import (
	"database/sql"
	"encoding/json"
	"testing"
	"time"

	"cmautobuy/admin/repository"
	_ "modernc.org/sqlite"
)

func TestBuildXLSXAvailabilityPlanConfirmsOnlySafeImportedSpecs(t *testing.T) {
	safe := `{"spec_source":"shopee_backfill","dimensions":[{"key":"color","name":"颜色"}],"skus":[` +
		`{"options":{"color":"黑"},"price_cent":2490,"list_price_cent":null,"inventory":7,"availability_status":"unknown"},` +
		`{"options":{"color":"白"},"price_cent":2490,"list_price_cent":3000,"availability_status":"unknown","available":null}]}`
	sources := XLSXPriceSources{PDDPrices: map[string]XLSXPDDPriceSource{
		"GOOD": {}, "DECIDED": {}, "BAD_PRICE": {}, "WRONG_SOURCE": {}, "PENDING": {}, "MISSING": {},
	}}
	targets := []repository.PDDPriceBackfillTarget{
		{GoodsID: "GOOD", SKUsJSON: safe, CollectStatus: "collected", UpdatedAt: "old"},
		{GoodsID: "DECIDED", SKUsJSON: `{"spec_source":"shopee_backfill","skus":[{"options":{"color":"黑"},"price_cent":100,"availability_status":"unknown","available":false}]}`, CollectStatus: "collected", UpdatedAt: "old"},
		{GoodsID: "BAD_PRICE", SKUsJSON: `{"spec_source":"shopee_backfill","skus":[{"options":{"color":"黑"},"price_cent":0,"availability_status":"unknown"}]}`, CollectStatus: "collected", UpdatedAt: "old"},
		{GoodsID: "WRONG_SOURCE", SKUsJSON: `{"spec_source":"client","skus":[{"options":{"color":"黑"},"price_cent":100,"availability_status":"unknown"}]}`, CollectStatus: "collected", UpdatedAt: "old"},
		{GoodsID: "PENDING", SKUsJSON: safe, CollectStatus: "pending", UpdatedAt: "old"},
	}
	plan := BuildXLSXAvailabilityPlan(sources, targets, time.Date(2026, 8, 14, 0, 0, 0, 0, time.UTC))
	if len(plan.Candidates) != 1 || plan.Candidates[0].PDDGoodsID != "GOOD" || plan.Candidates[0].SKUCount != 2 {
		t.Fatalf("只应确认一个安全候选: %+v", plan)
	}
	if plan.Summary[XLSXAvailabilityEligible] != 1 || plan.Summary[XLSXAvailabilityAlreadyDecided] != 1 ||
		plan.Summary[XLSXAvailabilityPriceInvalid] != 1 || plan.Summary[XLSXAvailabilitySourceMismatch] != 1 ||
		plan.Summary[XLSXAvailabilityStatusUnsupported] != 1 || plan.Summary[XLSXAvailabilityPDDMissing] != 1 {
		t.Fatalf("跳过分类不正确: %+v", plan.Summary)
	}
	var root struct {
		SpecSource string `json:"spec_source"`
		SKUs       []struct {
			Options            map[string]string `json:"options"`
			PriceCent          int64             `json:"price_cent"`
			ListPriceCent      *int64            `json:"list_price_cent"`
			Inventory          int               `json:"inventory"`
			Available          *bool             `json:"available"`
			AvailabilityStatus *string           `json:"availability_status"`
		} `json:"skus"`
	}
	if err := json.Unmarshal([]byte(plan.Candidates[0].NewSKUsJSON), &root); err != nil {
		t.Fatal(err)
	}
	if root.SpecSource != "shopee_backfill" || len(root.SKUs) != 2 {
		t.Fatalf("来源或 SKU 数被改坏: %+v", root)
	}
	for _, sku := range root.SKUs {
		if sku.Available == nil || !*sku.Available || sku.AvailabilityStatus != nil || sku.PriceCent != 2490 {
			t.Fatalf("应只确认 available 并删除 unknown 标记: %+v", sku)
		}
	}
	if root.SKUs[0].Inventory != 7 || root.SKUs[1].ListPriceCent == nil || *root.SKUs[1].ListPriceCent != 3000 {
		t.Fatalf("库存和列表价必须保留: %+v", root.SKUs)
	}
}

func TestConfirmBackfilledPDDAvailabilityRejectsPartialOrAmbiguousRows(t *testing.T) {
	tests := []struct {
		name, raw, want string
	}{
		{"空规格", `{"spec_source":"shopee_backfill","skus":[{"options":{},"price_cent":100,"availability_status":"unknown"}]}`, XLSXAvailabilitySpecsInvalid},
		{"缺价格", `{"spec_source":"shopee_backfill","skus":[{"options":{"color":"黑"},"availability_status":"unknown"}]}`, XLSXAvailabilityPriceInvalid},
		{"缺未知标记", `{"spec_source":"shopee_backfill","skus":[{"options":{"color":"黑"},"price_cent":100}]}`, XLSXAvailabilityMarkerInvalid},
		{"已有可售", `{"spec_source":"shopee_backfill","skus":[{"options":{"color":"黑"},"price_cent":100,"availability_status":"unknown","available":true}]}`, XLSXAvailabilityAlreadyDecided},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			if _, _, got := confirmBackfilledPDDAvailability(test.raw); got != test.want {
				t.Fatalf("状态=%q，期望 %q", got, test.want)
			}
		})
	}
}

func TestApplyXLSXAvailabilityPlanUsesWholeBatchRollback(t *testing.T) {
	db, err := sql.Open("sqlite", ":memory:")
	if err != nil {
		t.Fatal(err)
	}
	defer db.Close()
	db.SetMaxOpenConns(1)
	if _, err := db.Exec(`CREATE TABLE pdd_products(
		goods_id TEXT PRIMARY KEY, skus_json TEXT, collect_status TEXT,
		deleted_at TEXT, updated_at TEXT)`); err != nil {
		t.Fatal(err)
	}
	if _, err := db.Exec(`INSERT INTO pdd_products(goods_id,skus_json,collect_status,updated_at)
		VALUES('P1','old-1','collected','t1'),('P2','changed','collected','t2')`); err != nil {
		t.Fatal(err)
	}
	plan := XLSXAvailabilityPlan{Candidates: []XLSXAvailabilityCandidate{
		{PDDGoodsID: "P1", NewSKUsJSON: `{"skus":[1]}`, Original: repository.PDDPriceBackfillTarget{GoodsID: "P1", SKUsJSON: "old-1", CollectStatus: "collected", UpdatedAt: "t1"}},
		{PDDGoodsID: "P2", NewSKUsJSON: `{"skus":[2]}`, Original: repository.PDDPriceBackfillTarget{GoodsID: "P2", SKUsJSON: "old-2", CollectStatus: "collected", UpdatedAt: "t2"}},
	}}
	if _, err := ApplyXLSXAvailabilityPlan(db, plan, time.Now()); err == nil {
		t.Fatal("第二件原值变化时必须失败")
	}
	var raw, status, updatedAt string
	if err := db.QueryRow(`SELECT skus_json,collect_status,updated_at FROM pdd_products WHERE goods_id='P1'`).Scan(&raw, &status, &updatedAt); err != nil {
		t.Fatal(err)
	}
	if raw != "old-1" || status != "collected" || updatedAt != "t1" {
		t.Fatalf("整批必须回滚，实际 raw=%q status=%q updated_at=%q", raw, status, updatedAt)
	}
}