package web

import (
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"

	"github.com/gin-gonic/gin"

	"cmautobuy/admin/model"
)

func sybPostContext(t *testing.T, values url.Values) (*gin.Context, *httptest.ResponseRecorder) {
	t.Helper()
	gin.SetMode(gin.TestMode)
	recorder := httptest.NewRecorder()
	context, _ := gin.CreateTestContext(recorder)
	request := httptest.NewRequest(http.MethodPost, "/syb/sync", strings.NewReader(values.Encode()))
	request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	context.Request = request
	return context, recorder
}

func TestSybRedirectLogin_保留指定日期并打开登录弹窗(t *testing.T) {
	context, recorder := sybPostContext(t, url.Values{
		"order_no":  {"ORDER-1"},
		"date_from": {"2026-08-01"},
		"date_to":   {"2026-08-09"},
	})

	(&Handler{}).sybRedirectLogin(context, "")
	if context.Writer.Status() != http.StatusSeeOther {
		t.Fatalf("状态码 = %d，期望 %d", context.Writer.Status(), http.StatusSeeOther)
	}
	location, err := url.Parse(recorder.Header().Get("Location"))
	if err != nil {
		t.Fatalf("解析 Location 失败: %v", err)
	}
	query := location.Query()
	for name, want := range map[string]string{
		"login": "1", "order_no": "ORDER-1",
		"date_from": "2026-08-01", "date_to": "2026-08-09",
	} {
		if got := query.Get(name); got != want {
			t.Errorf("%s = %q，期望 %q；Location=%s", name, got, want, location.String())
		}
	}
}

func TestSybRedirectRange_保留输入并显示日期错误(t *testing.T) {
	context, recorder := sybPostContext(t, url.Values{
		"date_from": {"2026-08-09"},
		"date_to":   {"2026-08-01"},
	})

	(&Handler{}).sybRedirectRange(context, "开始日期不能晚于结束日期")
	location, err := url.Parse(recorder.Header().Get("Location"))
	if err != nil {
		t.Fatalf("解析 Location 失败: %v", err)
	}
	query := location.Query()
	if query.Get("range_error") == "" {
		t.Fatalf("日期错误后应该显示错误，Location=%s", location.String())
	}
	if query.Get("date_from") != "2026-08-09" || query.Get("date_to") != "2026-08-01" {
		t.Fatalf("日期错误后应该保留两端输入，Location=%s", location.String())
	}
}

func TestSybRedirectAfterStart_清除本次日期范围(t *testing.T) {
	context, recorder := sybPostContext(t, url.Values{
		"order_no": {"ORDER-1"}, "date_from": {"2026-08-01"}, "date_to": {"2026-08-09"},
	})
	(&Handler{}).sybRedirectAfterStart(context, "同步已开始")
	location, err := url.Parse(recorder.Header().Get("Location"))
	if err != nil {
		t.Fatal(err)
	}
	query := location.Query()
	if query.Get("order_no") != "ORDER-1" || query.Get("msg") != "同步已开始" {
		t.Fatalf("跳转应保留搜索和提示: %s", location.String())
	}
	if query.Has("date_from") || query.Has("date_to") {
		t.Fatalf("启动后不应保留旧日期，否则下一段会误重复: %s", location.String())
	}
}

func TestSybHistoryPagination_保留筛选并重开弹窗(t *testing.T) {
	view := sybHistoryPagination(2, 3, "ORDER-1", "店铺A", "pdd_missing", "2026-08-01", "2026-08-09")
	for _, raw := range []string{view.FirstURL, view.PrevURL, view.NextURL, view.LastURL} {
		location, err := url.Parse(raw)
		if err != nil {
			t.Fatal(err)
		}
		query := location.Query()
		if query.Get("history") != "1" || query.Get("order_no") != "ORDER-1" || query.Get("shop") != "店铺A" || query.Get("stage") != "pdd_missing" ||
			query.Get("date_from") != "2026-08-01" || query.Get("date_to") != "2026-08-09" {
			t.Fatalf("同步记录翻页链接丢失页面状态: %s", raw)
		}
	}
}

func TestSybHistoryURL_刷新时保留当前页和筛选(t *testing.T) {
	location, err := url.Parse(sybHistoryURL(3, "ORDER-1", "店铺A", "pdd_missing", "2026-08-01", "2026-08-09"))
	if err != nil {
		t.Fatal(err)
	}
	query := location.Query()
	for name, want := range map[string]string{
		"history": "1", "history_page": "3", "order_no": "ORDER-1",
		"shop": "店铺A", "stage": "pdd_missing",
		"date_from": "2026-08-01", "date_to": "2026-08-09",
	} {
		if got := query.Get(name); got != want {
			t.Fatalf("刷新链接 %s=%q，期望 %q；URL=%s", name, got, want, location.String())
		}
	}
}

func TestSybHistoryPartialURL_只读片段保留当前页和筛选(t *testing.T) {
	location, err := url.Parse(sybHistoryPartialURL(3, "ORDER-1", "店铺A", "pdd_missing", "2026-08-01", "2026-08-09"))
	if err != nil {
		t.Fatal(err)
	}
	if location.Path != "/syb/sync-history" {
		t.Fatalf("局部刷新应使用独立只读路由，实际 %s", location.Path)
	}
	query := location.Query()
	for name, want := range map[string]string{
		"history_page": "3", "order_no": "ORDER-1",
		"shop": "店铺A", "stage": "pdd_missing",
		"date_from": "2026-08-01", "date_to": "2026-08-09",
	} {
		if got := query.Get(name); got != want {
			t.Fatalf("局部刷新链接 %s=%q，期望 %q；URL=%s", name, got, want, location.String())
		}
	}
}

func TestSybHistoryPartialPagination_翻页继续使用片段路由(t *testing.T) {
	view := sybHistoryPartialPagination(2, 3, "ORDER-1", "店铺A", "pdd_missing", "2026-08-01", "2026-08-09")
	for _, raw := range []string{view.FirstURL, view.PrevURL, view.NextURL, view.LastURL} {
		location, err := url.Parse(raw)
		if err != nil {
			t.Fatal(err)
		}
		if location.Path != "/syb/sync-history" {
			t.Fatalf("弹窗局部翻页不应请求完整 SYB 页面：%s", raw)
		}
	}
}

func TestPurchaseTaskOptionsFromForm_忽略篡改模式并固定Live(t *testing.T) {
	context, _ := sybPostContext(t, url.Values{
		"client_id":      {"CLIENT-LIVE"},
		"execution_mode": {"dry_run"},
	})

	options := purchaseTaskOptionsFromForm(context)
	if options.ExecutionMode != model.TaskExecutionLive {
		t.Fatalf("篡改 execution_mode 不得创建演练任务，实际 %q", options.ExecutionMode)
	}
	if options.ClientID != "CLIENT-LIVE" {
		t.Fatalf("采购客户端读取错误: %+v", options)
	}
}

func TestSybCollectPddBatch_未选择时保留列表筛选(t *testing.T) {
	context, recorder := sybPostContext(t, url.Values{
		"order_no": {"ORDER-1"}, "shop": {"qwg8fkb044"},
		"stage": {"pdd_pending"}, "page": {"2"},
	})
	(&Handler{}).SybCollectPddBatch(context)
	location, err := url.Parse(recorder.Header().Get("Location"))
	if err != nil {
		t.Fatal(err)
	}
	query := location.Query()
	for name, want := range map[string]string{
		"order_no": "ORDER-1", "shop": "qwg8fkb044", "stage": "pdd_pending", "page": "2",
	} {
		if got := query.Get(name); got != want {
			t.Errorf("批量采集返回丢失 %s：got=%q want=%q Location=%s", name, got, want, location.String())
		}
	}
	if !strings.Contains(query.Get("msg"), "没有选择") {
		t.Fatalf("未选择应返回可读提示：%s", location.String())
	}
}