//
// Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package pipeline

import (
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"ragflow/internal/common"
)

// parserSetupParamsKeys are the Parser params keys that are NOT per-family
// setups: the wire-format declarations and the global vision settings. Every
// other object-valued params key is a file family.
var parserSetupParamsKeys = map[string]bool{
	"outputs":                   true,
	"allowed_output_format":     true,
	"enable_vision_enhancement": true,
	"vlm":                       true,
}

// TestBuiltinTemplatesCarryNoParserOutputFormat pins that no builtin
// ingestion template declares a Parser family's output_format.
//
// The Go Parser component exposes JSON only: no parser reads the key, so a
// template-baked value states an intent that is never honoured. Leaving it in
// place invites a reader to believe the value matters.
//
// Both copies are checked. dsl.components holds the params the runtime
// builds the Parser component from; dsl.graph.nodes holds the per-family
// setup list the frontend renders as the Parser form, which is a separate
// serialization of the same configuration and must not drift back.
func TestBuiltinTemplatesCarryNoParserOutputFormat(t *testing.T) {
	registry, err := DefaultRegistry()
	if err != nil {
		t.Fatalf("DefaultRegistry: %v", err)
	}
	refs := registry.Refs()
	if len(refs) == 0 {
		t.Fatal("no builtin templates registered")
	}

	for _, ref := range refs {
		t.Run(ref, func(t *testing.T) {
			dsl, err := LoadBuiltinDSL(ref)
			if err != nil {
				t.Fatalf("LoadBuiltinDSL(%q): %v", ref, err)
			}
			var root map[string]any
			if err := json.Unmarshal([]byte(dsl), &root); err != nil {
				t.Fatalf("decode %s DSL: %v", ref, err)
			}

			assertNoParserOutputFormatInParams(t, ref, root)
			assertNoParserOutputFormatInGraph(t, ref, root)
		})
	}
}

// assertNoParserOutputFormatInParams checks the dsl.components copy: every
// Parser component's per-family setup map must not declare output_format.
func assertNoParserOutputFormatInParams(t *testing.T, ref string, root map[string]any) {
	t.Helper()
	components, _ := root["components"].(map[string]any)
	for cpnID, rawComponent := range components {
		component, _ := rawComponent.(map[string]any)
		obj, _ := component["obj"].(map[string]any)
		if obj["component_name"] != "Parser" {
			continue
		}
		params, _ := obj["params"].(map[string]any)
		// Canvas templates saved by the Python-era frontend nest the families
		// under "setups" (compiler.json uses that shape); the runtime flattens
		// it before merging, so check the families wherever they live.
		if nested, ok := params["setups"].(map[string]any); ok {
			params = nested
		}
		for family, rawSetup := range params {
			if parserSetupParamsKeys[family] {
				continue
			}
			setup, ok := rawSetup.(map[string]any)
			if !ok {
				continue
			}
			if value, found := setup["output_format"]; found {
				t.Errorf("%s: Parser %s family %q declares output_format = %v; no parser reads the key", ref, cpnID, family, value)
			}
		}
	}
}

// assertNoParserOutputFormatInGraph checks the dsl.graph.nodes copy: every
// Parser node's form setup list must not declare output_format. The frontend
// renders these entries as the Parser form, so a value here reaches the UI
// even though the runtime would discard it.
func assertNoParserOutputFormatInGraph(t *testing.T, ref string, root map[string]any) {
	t.Helper()
	graph, _ := root["graph"].(map[string]any)
	nodes, _ := graph["nodes"].([]any)
	for _, rawNode := range nodes {
		node, _ := rawNode.(map[string]any)
		id, _ := node["id"].(string)
		if !common.IsParserComponentID(id) {
			continue
		}
		data, _ := node["data"].(map[string]any)
		form, _ := data["form"].(map[string]any)
		setups, _ := form["setups"].([]any)
		for _, rawSetup := range setups {
			setup, _ := rawSetup.(map[string]any)
			fileFormat, _ := setup["fileFormat"].(string)
			if value, found := setup["output_format"]; found {
				t.Errorf("%s: Parser node %s family %q declares output_format = %v; no parser reads the key", ref, id, fileFormat, value)
			}
		}
	}
}

// TestAgentTemplatesCarryNoParserOutputFormat extends the pin to the seeded
// canvas templates under internal/agent/templates. The ingestion-pipeline
// canvases there (title_chunker, chunk_summary, advanced_ingestion_pipeline)
// carry Parser nodes too, and the dao seeder copies their DSL verbatim into
// the canvas_template table, so a baked key there reaches live canvases.
// compiler.json is a bare DSL fixture without the metadata wrapper, so the
// "dsl" key is optional.
func TestAgentTemplatesCarryNoParserOutputFormat(t *testing.T) {
	dir := filepath.Join("..", "..", "agent", "templates")
	entries, err := os.ReadDir(dir)
	if err != nil {
		t.Fatalf("read agent templates: %v", err)
	}
	checked := 0
	for _, entry := range entries {
		name := entry.Name()
		if entry.IsDir() || !strings.HasSuffix(name, ".json") {
			continue
		}
		raw, err := os.ReadFile(filepath.Join(dir, name))
		if err != nil {
			t.Fatalf("read %s: %v", name, err)
		}
		var wrapper map[string]any
		if err := json.Unmarshal(raw, &wrapper); err != nil {
			t.Fatalf("decode %s: %v", name, err)
		}
		root, ok := wrapper["dsl"].(map[string]any)
		if !ok {
			root = wrapper
		}
		checked++
		t.Run(name, func(t *testing.T) {
			assertNoParserOutputFormatInParams(t, name, root)
			assertNoParserOutputFormatInGraph(t, name, root)
		})
	}
	if checked == 0 {
		t.Fatal("no agent templates found")
	}
}