package promptkit_test

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

	"go.maximumdirect.net/configkit"
	"go.maximumdirect.net/promptkit"
	"go.yaml.in/yaml/v4"
)

func TestResourceInspectionGenericEncoding(t *testing.T) {
	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &configkit.Input{Source: configkit.Mapping("resources", map[string]any{
		"backends": []any{map[string]any{"id": "local", "endpoint": "https://example.test/v1", "concurrency_limit": 2, "extra_params": map[string]any{"null": nil, "array": []any{nil}}, "smoke_tests": map[string]any{"reachability": map[string]any{}}}, map[string]any{"id": "plain", "endpoint": "https://plain.test/v1"}},
		"profiles": []any{map[string]any{"id": "parent", "backend": "local", "model": "model"}, map[string]any{"id": "profile", "extends": map[string]any{"id": "parent"}, "temperature": 0, "api_key_required": false, "endpoint": "", "extra_params": map[string]any{}}, map[string]any{"id": "unset", "extra_params": nil}},
		"prompts":  []any{map[string]any{"id": "prompt", "inputs": []any{map[string]any{"name": "a", "required": false, "description": ""}, map[string]any{"name": "b"}}, "messages": []any{map[string]any{"role": "user", "content": "", "cache_control": map[string]any{"type": "ephemeral", "ttl": ""}}}, "output": map[string]any{"format": "text", "validation_mode": "basic", "repair_attempts": 0}}, map[string]any{"id": "empty-inputs", "inputs": []any{}, "messages": []any{map[string]any{"role": "user", "content": "x"}}, "output": map[string]any{"format": "text", "validation_mode": "none"}}, map[string]any{"id": "omitted-inputs", "messages": []any{map[string]any{"role": "user", "content": "x"}}, "output": map[string]any{"format": "text", "validation_mode": "none"}}},
	})}}})
	if err != nil {
		t.Fatal(err)
	}
	ctx := context.Background()
	backend, err := engine.InspectBackend(ctx, "local")
	if err != nil {
		t.Fatal(err)
	}
	plain, err := engine.InspectBackend(ctx, "plain")
	if err != nil {
		t.Fatal(err)
	}
	profile, err := engine.InspectProfile(ctx, "profile")
	if err != nil {
		t.Fatal(err)
	}
	unset, err := engine.InspectProfile(ctx, "unset")
	if err != nil {
		t.Fatal(err)
	}
	prompt, err := engine.InspectPrompt(ctx, "prompt")
	if err != nil {
		t.Fatal(err)
	}
	empty, err := engine.InspectPrompt(ctx, "empty-inputs")
	if err != nil {
		t.Fatal(err)
	}
	omitted, err := engine.InspectPrompt(ctx, "omitted-inputs")
	if err != nil {
		t.Fatal(err)
	}
	for name, codec := range map[string]struct {
		marshal   func(any) ([]byte, error)
		unmarshal func([]byte, any) error
	}{
		"json": {json.Marshal, json.Unmarshal}, "yaml": {yaml.Marshal, yaml.Unmarshal},
	} {
		t.Run(name, func(t *testing.T) {
			decode := func(v any) map[string]any {
				t.Helper()
				data, err := codec.marshal(v)
				if err != nil {
					t.Fatal(err)
				}
				var m map[string]any
				if err := codec.unmarshal(data, &m); err != nil {
					t.Fatal(err)
				}
				return m
			}
			absent := func(m map[string]any, keys ...string) {
				t.Helper()
				for _, key := range keys {
					if _, ok := m[key]; ok {
						t.Errorf("unexpected %s in %#v", key, m)
					}
				}
			}
			b := decode(backend)
			if b["id"] != "local" || fmt.Sprint(b["concurrency_limit"]) != "2" || fmt.Sprint(b["queue_capacity"]) != "1024" {
				t.Errorf("backend = %#v", b)
			}
			params := b["extra_params"].(map[string]any)
			if v, ok := params["null"]; !ok || v != nil || params["array"].([]any)[0] != nil {
				t.Errorf("provider nulls = %#v", params)
			}
			smoke := b["smoke_tests"].(map[string]any)
			if reach := smoke["reachability"].(map[string]any); len(reach) != 0 {
				t.Errorf("reachability = %#v", reach)
			}
			absent(b, "extends")
			absent(decode(plain), "smoke_tests", "queue_capacity", "concurrency_limit")
			p := decode(profile)
			if p["id"] != "profile" || p["backend"] != "local" || p["endpoint"] != "" || p["api_key_required"] != false || fmt.Sprint(p["temperature"]) != "0" || len(p["extra_params"].(map[string]any)) != 0 {
				t.Errorf("profile = %#v", p)
			}
			absent(p, "extends", "effective_model_params", "timeout_seconds", "api_key_env")
			absent(decode(unset), "extra_params", "endpoint")
			q := decode(prompt)
			inputs := q["inputs"].([]any)
			a := inputs[0].(map[string]any)
			bInput := inputs[1].(map[string]any)
			if a["required"] != false || a["description"] != "" {
				t.Errorf("input = %#v", a)
			}
			absent(bInput, "required", "description")
			message := q["messages"].([]any)[0].(map[string]any)
			if message["content"] != "" || message["cache_control"].(map[string]any)["ttl"] != "" {
				t.Errorf("message = %#v", message)
			}
			absent(message, "content_file", "template")
			if fmt.Sprint(q["output"].(map[string]any)["repair_attempts"]) != "0" {
				t.Errorf("output = %#v", q["output"])
			}
			if inputs := decode(empty)["inputs"].([]any); len(inputs) != 0 {
				t.Errorf("empty inputs = %#v", inputs)
			}
			absent(decode(omitted), "inputs")
		})
	}
}