package ai

import (
	"bytes"
	"encoding/base64"
	"fmt"
	"image"
	"image/color"
	"image/draw"
	"image/png"
	"os"
	"strings"
	"time"

	"github.com/cloudwego/eino/schema"
	"github.com/httprunner/httprunner/v5/code"
	"github.com/httprunner/httprunner/v5/uixt/types"
	"github.com/pkg/errors"
)

type IPlanner interface {
	Call(opts *PlanningOptions) (*PlanningResult, error)
}

// PlanningOptions represents the input options for planning
type PlanningOptions struct {
	UserInstruction string          `json:"user_instruction"` // append to system prompt
	Message         *schema.Message `json:"message"`
	Size            types.Size      `json:"size"`
}

// PlanningResult represents the result of planning
type PlanningResult struct {
	NextActions   []ParsedAction `json:"actions"`
	ActionSummary string         `json:"summary"`
	Error         string         `json:"error,omitempty"`
}

// ParsedAction represents a parsed action from the VLM response
type ParsedAction struct {
	ActionType   ActionType             `json:"actionType"`
	ActionInputs map[string]interface{} `json:"actionInputs"`
	Thought      string                 `json:"thought"`
}

type ActionType string

const (
	ActionTypeClick    ActionType = "click"
	ActionTypeTap      ActionType = "tap"
	ActionTypeDrag     ActionType = "drag"
	ActionTypeSwipe    ActionType = "swipe"
	ActionTypeWait     ActionType = "wait"
	ActionTypeFinished ActionType = "finished"
	ActionTypeCallUser ActionType = "call_user"
	ActionTypeType     ActionType = "type"
	ActionTypeScroll   ActionType = "scroll"
)

const (
	defaultTimeout = 30 * time.Second
)

func validatePlanningInput(opts *PlanningOptions) error {
	if opts.UserInstruction == "" {
		return errors.Wrap(code.LLMPrepareRequestError, "user instruction is empty")
	}

	if opts.Message == nil || opts.Message.Role == "" {
		return errors.Wrap(code.LLMPrepareRequestError, "user message is empty")
	}

	if opts.Message.Role == schema.User {
		// check MultiContent
		if len(opts.Message.MultiContent) > 0 {
			for _, content := range opts.Message.MultiContent {
				if content.Type == schema.ChatMessagePartTypeImageURL && content.ImageURL == nil {
					return errors.Wrap(code.LLMPrepareRequestError, "invalid image data")
				}
			}
		}
	}

	return nil
}

// SavePositionImg saves an image with position markers
func SavePositionImg(params struct {
	InputImgBase64 string
	Rect           struct {
		X float64
		Y float64
	}
	OutputPath string
}) error {
	// 解码Base64图像
	imgData := params.InputImgBase64
	// 如果包含了数据URL前缀，去掉它
	if strings.HasPrefix(imgData, "data:image/") {
		parts := strings.Split(imgData, ",")
		if len(parts) > 1 {
			imgData = parts[1]
		}
	}

	// 解码Base64
	unbased, err := base64.StdEncoding.DecodeString(imgData)
	if err != nil {
		return fmt.Errorf("无法解码Base64图像: %w", err)
	}

	// 解码图像
	reader := bytes.NewReader(unbased)
	img, _, err := image.Decode(reader)
	if err != nil {
		return fmt.Errorf("无法解码图像数据: %w", err)
	}

	// 创建一个可以在其上绘制的图像
	bounds := img.Bounds()
	rgba := image.NewRGBA(bounds)
	draw.Draw(rgba, bounds, img, bounds.Min, draw.Src)

	// 在点击/拖动位置绘制标记
	markRadius := 10
	x, y := int(params.Rect.X), int(params.Rect.Y)

	// 绘制红色圆圈
	for i := -markRadius; i <= markRadius; i++ {
		for j := -markRadius; j <= markRadius; j++ {
			if i*i+j*j <= markRadius*markRadius {
				if x+i >= 0 && x+i < bounds.Max.X && y+j >= 0 && y+j < bounds.Max.Y {
					rgba.Set(x+i, y+j, color.RGBA{255, 0, 0, 255})
				}
			}
		}
	}

	// 保存图像
	outFile, err := os.Create(params.OutputPath)
	if err != nil {
		return fmt.Errorf("无法创建输出文件: %w", err)
	}
	defer outFile.Close()

	// 编码为PNG并保存
	if err := png.Encode(outFile, rgba); err != nil {
		return fmt.Errorf("无法编码和保存图像: %w", err)
	}

	return nil
}

// maskAPIKey masks the API key
func maskAPIKey(key string) string {
	if len(key) <= 8 {
		return "******"
	}

	return key[:4] + "******" + key[len(key)-4:]
}