package spells

import (
	"bytes"
	"encoding/json"
	"strings"
	"testing"
)

func TestLoadResponseSchemaUsesExtractorOwnedLLMSchema(t *testing.T) {
	schema, err := loadResponseSchema()
	if err != nil {
		t.Fatalf("loadResponseSchema() error = %v, want nil", err)
	}
	if schema.Key != ResponseSchemaKey || schema.ID != ResponseSchemaID || schema.Version != SchemaVersion || schema.Name != ResponseSchemaName {
		t.Fatalf("schema identity = %#v, want maintained response identity", schema)
	}
	if !strings.HasPrefix(schema.SHA256, "sha256:") || !json.Valid(schema.JSONSchema) {
		t.Fatalf("schema metadata = %#v, want valid hashed JSON", schema)
	}

	var decoded map[string]any
	if err := json.Unmarshal(schema.JSONSchema, &decoded); err != nil {
		t.Fatalf("Unmarshal(schema.JSONSchema) error = %v", err)
	}
	if decoded["$id"] != "notarius.dnd.spells.llm" {
		t.Fatalf("LLM schema $id = %#v, want extractor transport schema", decoded["$id"])
	}
	properties := decoded["properties"].(map[string]any)
	spellCastProperties := properties["spell_casts"].(map[string]any)["items"].(map[string]any)["properties"].(map[string]any)
	sourceRefItems := spellCastProperties["source_refs"].(map[string]any)["items"].(map[string]any)
	sourceRefProperties := sourceRefItems["properties"].(map[string]any)
	if _, ok := sourceRefProperties["source_id"]; ok {
		t.Fatalf("LLM source ref schema contains canonical source_id: %#v", sourceRefProperties)
	}
}

func TestResponseSchemaJSONIsMutationSafe(t *testing.T) {
	first, err := loadResponseSchema()
	if err != nil {
		t.Fatalf("loadResponseSchema() error = %v", err)
	}
	first.JSONSchema[0] = '['
	second, err := loadResponseSchema()
	if err != nil || !json.Valid(second.JSONSchema) || bytes.Equal(first.JSONSchema, second.JSONSchema) {
		t.Fatalf("second schema = %s, %v; want defensive valid copy", second.JSONSchema, err)
	}
}

func TestResponseSchemaDiagnosticsOmitRawSchema(t *testing.T) {
	schema, err := loadResponseSchema()
	if err != nil {
		t.Fatalf("loadResponseSchema() error = %v", err)
	}
	diagnostics := schema.DiagnosticsMap()
	if diagnostics["key"] != ResponseSchemaKey {
		t.Fatalf("diagnostics = %#v, want response key", diagnostics)
	}
	if _, ok := diagnostics["json_schema"]; ok {
		t.Fatalf("diagnostics include raw schema: %#v", diagnostics)
	}
}