// Copyright 2026 tamakyi. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package form

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

	"github.com/flamego/flamego"
	"github.com/flamego/template"

	"github.com/tamakyi/TamaBox/internal/context"
)

// TestBindURLEncodedSkipsFileHeaderField 回归测试：application/x-www-form-urlencoded 提交
// 到带 []*multipart.FileHeader 字段的结构体时不应 panic。
//
// 背景：Bind 的非 multipart 分支曾对所有字段无条件 Set(string)，遇到 NewQuestion.Images
// （[]*multipart.FileHeader）触发 reflect.Set 类型不匹配 panic（提问表单因带
// enctype="multipart/form-data" 走 multipart 分支而从未触发；独立私聊表单等纯文本提交
// 会命中此路径，导致提问关闭时提交私聊 500）。
func TestBindURLEncodedSkipsFileHeaderField(t *testing.T) {
	f := flamego.New()
	// 最小依赖注入：提供项目 context.Context 与 template.Data（Bind 仅用到这两个参数）。
	f.Use(func(ctx flamego.Context) {
		data := template.Data{}
		ctx.Map(context.Context{Context: ctx, Data: data})
		ctx.Map(data)
	})

	var bound NewQuestion
	f.Post("/", Bind(NewQuestion{}), func(q NewQuestion) {
		bound = q
	})

	req := httptest.NewRequest(http.MethodPost, "/",
		strings.NewReader("content=你好&start_chat_val=true"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	rec := httptest.NewRecorder()
	f.ServeHTTP(rec, req)

	if rec.Code >= http.StatusInternalServerError {
		t.Fatalf("unexpected status %d, want < 500 (reflect.Set panic 不应发生)", rec.Code)
	}
	if bound.Content != "你好" {
		t.Fatalf("Content = %q, want %q", bound.Content, "你好")
	}
	if bound.StartChat != "true" {
		t.Fatalf("StartChat = %q, want %q", bound.StartChat, "true")
	}
	if bound.Images != nil {
		t.Fatalf("Images = %v, want nil（非 multipart 请求应跳过图片字段）", bound.Images)
	}
}

// TestBindMultipartStillBindsImages 确认 multipart 分支（提问表单路径）不受影响：
// 文件字段仍能正常绑定。
func TestBindMultipartStillBindsImages(t *testing.T) {
	f := flamego.New()
	f.Use(func(ctx flamego.Context) {
		data := template.Data{}
		ctx.Map(context.Context{Context: ctx, Data: data})
		ctx.Map(data)
	})

	var bound NewQuestion
	f.Post("/", Bind(NewQuestion{}), func(q NewQuestion) {
		bound = q
	})

	// multipart 请求，携带一个普通字段，无文件
	body := "--BOUND\r\n" +
		"Content-Disposition: form-data; name=\"content\"\r\n\r\n" +
		"hello\r\n" +
		"--BOUND--\r\n"
	req := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(body))
	req.Header.Set("Content-Type", "multipart/form-data; boundary=BOUND")
	rec := httptest.NewRecorder()
	f.ServeHTTP(rec, req)

	if rec.Code >= http.StatusInternalServerError {
		t.Fatalf("unexpected status %d, want < 500", rec.Code)
	}
	if bound.Content != "hello" {
		t.Fatalf("Content = %q, want %q", bound.Content, "hello")
	}
	if bound.Images != nil {
		t.Fatalf("Images = %v, want nil", bound.Images)
	}
}