package main

import (
	"context"
	"encoding/json"
	"fmt"
	"os"

	"gitea.maximumdirect.net/eric/ConfigKit"
	"gitea.maximumdirect.net/eric/promptkit"
)

type deterministicClient struct{}

func (deterministicClient) Generate(
	ctx context.Context,
	_ promptkit.GenerateRequest,
) (*promptkit.GenerateResponse, error) {
	if err := ctx.Err(); err != nil {
		return nil, err
	}

	return &promptkit.GenerateResponse{
		Content: "Ada finished the migration review.",
		Usage: promptkit.TokenUsage{
			PromptTokens:     12,
			CompletionTokens: 6,
			TotalTokens:      18,
		},
	}, nil
}

type summary struct {
	Output           string                     `json:"output"`
	ValidationStatus promptkit.ValidationStatus `json:"validation_status"`
	IsValid          bool                       `json:"is_valid"`
	Model            string                     `json:"model"`
	TotalTokens      int                        `json:"total_tokens"`
}

func main() {
	endpoint, model := "https://example.invalid/v1", "offline-model"
	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{
		Underlays: []configkit.Underlay{{Inputs: []configkit.Input{{Source: promptkit.ProfileSource("example profile", map[string]promptkit.ProfileConfig{
			"offline-example": {Endpoint: &endpoint, Model: &model},
		})}}}},
		Main: &configkit.Input{Source: configkit.File("examples/go-library/run/prompt.yaml")},
	}}, promptkit.WithLLMClient(deterministicClient{}))
	if err != nil {
		exit(err)
	}

	result, err := engine.Run(context.Background(), promptkit.RunRequest{
		PromptID: "example.run",
		Inputs: map[string]promptkit.ArtifactRef{
			"note": promptkit.Inline("Ada finished the migration review."),
		},
	})
	if err != nil {
		exit(err)
	}

	encoder := json.NewEncoder(os.Stdout)
	encoder.SetIndent("", "  ")
	if err := encoder.Encode(summary{
		Output:           result.RawOutput,
		ValidationStatus: result.Validation.Status,
		IsValid:          result.Validation.IsValid,
		Model:            result.ModelName,
		TotalTokens:      result.Usage.TotalTokens,
	}); err != nil {
		exit(err)
	}
}

func exit(err error) {
	fmt.Fprintln(os.Stderr, err)
	os.Exit(1)
}