package service

import (
	"fmt"
	"strings"
	"testing"
)

func TestValidateImageTaskRejectsOversizedGrokPromptByUTF8Bytes(t *testing.T) {
	prompt := strings.Repeat("中", 4001)
	input := canvasGenerationInput{
		Mode:   "image",
		Prompt: prompt,
		Config: providerConfig{InterfaceType: "grok-image", Model: "grok-imagine-image-quality"},
	}

	err := validateImageTask(DefaultImageCapabilityConfig("grok-image", "grok-imagine-image-quality"), input)
	if err == nil {
		t.Fatal("validateImageTask() error = nil")
	}
	wantBytes := fmt.Sprintf("%d UTF-8 字节", len(prompt))
	if !strings.Contains(err.Error(), wantBytes) || !strings.Contains(err.Error(), "8000") || !strings.Contains(err.Error(), "连线文本") {
		t.Fatalf("validateImageTask() error = %q", err)
	}
}

func TestValidateImageTaskDoesNotApplyQualityPromptLimitToGrokLite(t *testing.T) {
	prompt := strings.Repeat("中", 4001)
	input := canvasGenerationInput{
		Mode:   "image",
		Prompt: prompt,
		Config: providerConfig{InterfaceType: "grok-image", Model: "grok-imagine-image"},
	}

	if err := validateImageTask(DefaultImageCapabilityConfig("grok-image", "grok-imagine-image"), input); err != nil {
		t.Fatalf("validateImageTask() error = %q", err)
	}
}

func TestValidateImageTaskEnforcesGPTImage2CustomSizeLimits(t *testing.T) {
	profile := DefaultImageCapabilityConfig("openai-image", "gpt-image-2")
	profile.Size.AllowCustom = true

	valid := canvasGenerationInput{Mode: "image", Config: providerConfig{InterfaceType: "openai-image", Model: "gpt-image-2", Size: "3840x1920"}}
	if err := validateImageTask(profile, valid); err != nil {
		t.Fatalf("validateImageTask(valid) error = %v", err)
	}

	tests := map[string]string{
		"4096x2048": "最长边",
		"3840x2161": "16 的倍数",
		"3840x1024": "宽高比",
		"640x640":   "总像素",
	}
	for size, want := range tests {
		t.Run(size, func(t *testing.T) {
			input := canvasGenerationInput{Mode: "image", Config: providerConfig{InterfaceType: "openai-image", Model: "gpt-image-2", Size: size}}
			err := validateImageTask(profile, input)
			if err == nil || !strings.Contains(err.Error(), want) {
				t.Fatalf("validateImageTask(%s) error = %v, want %q", size, err, want)
			}
		})
	}
}