package skill

import (
	"encoding/json"
	"fmt"
	"strings"
)

// ManualInput is the form payload for the "manual" source type: the operator
// types one tool's details directly. Everything the synthesis pass needs is
// here, so manual skills can be produced without any LLM call.
type ManualInput struct {
	Name        string            `json:"name"`
	Description string            `json:"description"`
	Method      string            `json:"method"`
	URL         string            `json:"url"`
	QueryParams map[string]string `json:"query_params"` // name -> placeholder target; we store as {{name}}
	PathParams  []string          `json:"path_params"`  // names appearing in URL as {name}
	Headers     map[string]string `json:"headers"`
	// ParamSchema, when supplied, overrides the flat param construction below.
	ParamSchema json.RawMessage `json:"param_schema"`
}

// ManualCandidate builds a CandidateTool from a manual form submission. It is
// the simplest importer: the operator has already done the LLM's job by
// hand, so we just normalise into our shapes.
func ManualCandidate(in ManualInput) (CandidateTool, error) {
	name := strings.TrimSpace(in.Name)
	if name == "" {
		return CandidateTool{}, fmt.Errorf("工具名称必填")
	}
	if strings.TrimSpace(in.URL) == "" {
		return CandidateTool{}, fmt.Errorf("URL 必填")
	}
	method := strings.ToUpper(strings.TrimSpace(in.Method))
	if method == "" {
		method = "GET"
	}

	// Default param schema: every query and path param is a required string.
	props := map[string]any{}
	var required []string
	for _, n := range in.PathParams {
		n = strings.TrimSpace(n)
		if n == "" {
			continue
		}
		props[n] = map[string]any{"type": "string"}
		required = append(required, n)
	}
	query := map[string]string{}
	for n := range in.QueryParams {
		n = strings.TrimSpace(n)
		if n == "" {
			continue
		}
		props[n] = map[string]any{"type": "string"}
		query[n] = "{{" + n + "}}"
	}
	for n := range in.Headers {
		n = strings.TrimSpace(n)
		if n == "" {
			continue
		}
		props[n] = map[string]any{"type": "string"}
	}

	var paramsJSON jsonObject
	if len(in.ParamSchema) > 0 && strings.TrimSpace(string(in.ParamSchema)) != "" {
		paramsJSON = jsonObject(in.ParamSchema)
	} else {
		schema := map[string]any{"type": "object", "properties": props}
		if len(required) > 0 {
			schema["required"] = required
		}
		b, _ := json.Marshal(schema)
		paramsJSON = jsonObject(b)
	}

	// Path params map: stored so the executor can template {name} in the URL.
	pathParams := map[string]string{}
	for _, n := range in.PathParams {
		n = strings.TrimSpace(n)
		if n != "" {
			pathParams[n] = "{{" + n + "}}"
		}
	}

	return CandidateTool{
		Name:        name,
		Description: strings.TrimSpace(in.Description),
		Parameters:  paramsJSON,
		Endpoint: Endpoint{
			Method: method,
			URL:    strings.TrimSpace(in.URL),
			Path:   pathParams,
			Query:  query,
			Header: in.Headers,
		},
	}, nil
}