package config

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestNotariusOmittedAndDisabledBehavior(t *testing.T) {
	dir := t.TempDir()
	omittedPath := filepath.Join(dir, "omitted.yml")
	if err := os.WriteFile(omittedPath, []byte(testPipelineBaseYAML), 0o644); err != nil {
		t.Fatalf("write omitted pipeline: %v", err)
	}
	omitted, err := LoadPipeline(omittedPath)
	if err != nil {
		t.Fatalf("LoadPipeline(omitted) error = %v", err)
	}
	if omitted.Notarius != nil {
		t.Fatalf("Notarius = %#v, want nil when omitted", omitted.Notarius)
	}

	disabledPath := filepath.Join(dir, "disabled.yml")
	disabledYAML := testPipelineBaseYAML + `
notarius:
  enabled: false
  config_path: relative/notarius.yml
`
	if err := os.WriteFile(disabledPath, []byte(disabledYAML), 0o644); err != nil {
		t.Fatalf("write disabled pipeline: %v", err)
	}
	disabled, err := LoadPipeline(disabledPath)
	if err != nil {
		t.Fatalf("LoadPipeline(disabled) error = %v", err)
	}
	if disabled.Notarius == nil {
		t.Fatal("Notarius = nil, want configured disabled section")
	}
	if disabled.Notarius.Enabled {
		t.Fatal("Notarius.Enabled = true, want false")
	}
	if disabled.Notarius.Binary != DefaultNotariusBinary || disabled.Notarius.Timeout != DefaultNotariusTimeout {
		t.Fatalf("disabled defaults = %#v", disabled.Notarius)
	}
	if disabled.Notarius.ConfigPath != "relative/notarius.yml" || disabled.Notarius.WorkingDirectory != "" {
		t.Fatalf("disabled paths were resolved unexpectedly: %#v", disabled.Notarius)
	}
}

func TestNotariusEnabledDefaultsAndPathResolution(t *testing.T) {
	dir := t.TempDir()
	pipelinePath := filepath.Join(dir, "deployment", "pipeline.yml")
	if err := os.MkdirAll(filepath.Dir(pipelinePath), 0o755); err != nil {
		t.Fatalf("MkdirAll() error = %v", err)
	}
	pipelineYAML := testPipelineBaseYAML + `
notarius:
  enabled: true
  config_path: notarius/config.yml
  pipeline_id: dnd-session
  outputs:
    npc_registry:
      lane_id: npc-registry
      media_type: application/json
      schema_id: notarius.dnd.npc_registry
      schema_version: v1
`
	if err := os.WriteFile(pipelinePath, []byte(pipelineYAML), 0o644); err != nil {
		t.Fatalf("write pipeline: %v", err)
	}

	cfg, err := LoadPipeline(pipelinePath)
	if err != nil {
		t.Fatalf("LoadPipeline() error = %v", err)
	}
	wantConfigPath := filepath.Join(filepath.Dir(pipelinePath), "notarius", "config.yml")
	if cfg.Notarius.Binary != "notarius" || cfg.Notarius.Timeout != "3h" {
		t.Fatalf("defaults = %#v", cfg.Notarius)
	}
	if cfg.Notarius.ConfigPath != wantConfigPath {
		t.Fatalf("config_path = %q, want %q", cfg.Notarius.ConfigPath, wantConfigPath)
	}
	if cfg.Notarius.WorkingDirectory != filepath.Dir(wantConfigPath) {
		t.Fatalf("working_directory = %q, want %q", cfg.Notarius.WorkingDirectory, filepath.Dir(wantConfigPath))
	}

	explicitPath := filepath.Join(dir, "explicit.yml")
	explicitYAML := strings.Replace(pipelineYAML, "  pipeline_id: dnd-session\n", "  pipeline_id: dnd-session\n  working_directory: runtime\n", 1)
	if err := os.WriteFile(explicitPath, []byte(explicitYAML), 0o644); err != nil {
		t.Fatalf("write explicit pipeline: %v", err)
	}
	explicit, err := LoadPipeline(explicitPath)
	if err != nil {
		t.Fatalf("LoadPipeline(explicit working directory) error = %v", err)
	}
	if explicit.Notarius.WorkingDirectory != filepath.Join(dir, "runtime") {
		t.Fatalf("explicit working_directory = %q, want %q", explicit.Notarius.WorkingDirectory, filepath.Join(dir, "runtime"))
	}
}

func TestNotariusStrictYAML(t *testing.T) {
	tests := []struct {
		name string
		yaml string
	}{
		{name: "unknown section field", yaml: "notarius:\n  unknown: true\n"},
		{name: "unknown output field", yaml: "notarius:\n  outputs:\n    npc_registry:\n      lane_id: npc-registry\n      unknown: true\n"},
		{name: "unsupported session id", yaml: "notarius:\n  session_id: forbidden\n"},
		{name: "unsupported model", yaml: "notarius:\n  model: forbidden\n"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			path := filepath.Join(t.TempDir(), "pipeline.yml")
			if err := os.WriteFile(path, []byte(testPipelineBaseYAML+"\n"+tt.yaml), 0o644); err != nil {
				t.Fatalf("write pipeline: %v", err)
			}
			if _, err := LoadPipeline(path); err == nil || !strings.Contains(err.Error(), "strict decode failed") {
				t.Fatalf("LoadPipeline() error = %v, want strict decode failure", err)
			}
		})
	}
}

func TestNotariusEnabledValidation(t *testing.T) {
	valid := `notarius:
  enabled: true
  config_path: ./notarius.yml
  pipeline_id: dnd-session
  timeout: 45m
  outputs:
    npc_registry:
      lane_id: npc-registry
      media_type: application/json
      schema_id: notarius.dnd.npc_registry
      schema_version: v1
      module_key: dnd/npc-registry
`
	tests := []struct {
		name    string
		section string
		wantErr string
	}{
		{name: "valid", section: valid},
		{name: "blank binary", section: strings.Replace(valid, "  enabled: true\n", "  enabled: true\n  binary: \"   \"\n", 1), wantErr: "pipeline.notarius.binary is required"},
		{name: "missing config path", section: strings.Replace(valid, "  config_path: ./notarius.yml\n", "", 1), wantErr: "pipeline.notarius.config_path is required"},
		{name: "missing pipeline id", section: strings.Replace(valid, "  pipeline_id: dnd-session\n", "", 1), wantErr: "pipeline.notarius.pipeline_id is required"},
		{name: "missing outputs", section: strings.Split(valid, "  outputs:\n")[0], wantErr: "pipeline.notarius.outputs must contain at least one output"},
		{name: "zero timeout", section: strings.Replace(valid, "  timeout: 45m", "  timeout: 0s", 1), wantErr: "pipeline.notarius.timeout must be positive"},
		{name: "negative timeout", section: strings.Replace(valid, "  timeout: 45m", "  timeout: -1s", 1), wantErr: "pipeline.notarius.timeout must be positive"},
		{name: "invalid timeout", section: strings.Replace(valid, "  timeout: 45m", "  timeout: later", 1), wantErr: "pipeline.notarius.timeout must be a valid duration"},
		{name: "invalid output key", section: strings.Replace(valid, "    npc_registry:", "    npc-registry:", 1), wantErr: "outputs keys must match"},
		{name: "missing lane", section: strings.Replace(valid, "      lane_id: npc-registry\n", "", 1), wantErr: "lane_id is required"},
		{name: "missing media type", section: strings.Replace(valid, "      media_type: application/json\n", "", 1), wantErr: "media_type is required"},
		{name: "missing schema id", section: strings.Replace(valid, "      schema_id: notarius.dnd.npc_registry\n", "", 1), wantErr: "schema_id is required"},
		{name: "missing schema version", section: strings.Replace(valid, "      schema_version: v1\n", "", 1), wantErr: "schema_version is required"},
		{
			name: "normalized key collision",
			section: strings.Replace(valid, "      module_key: dnd/npc-registry\n", `      module_key: dnd/npc-registry
    " npc_registry ":
      lane_id: npc-registry-two
      media_type: application/json
      schema_id: two
      schema_version: v1
`, 1),
			wantErr: "normalize to duplicate source",
		},
		{
			name: "duplicate normalized lane",
			section: strings.Replace(valid, "      module_key: dnd/npc-registry\n", `      module_key: dnd/npc-registry
    spells:
      lane_id: " npc-registry "
      media_type: application/json
      schema_id: two
      schema_version: v1
`, 1),
			wantErr: "duplicates pipeline.notarius.outputs.npc_registry.lane_id",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			pipelinePath, sessionPath := writeConfigFiles(t, testPipelineBaseYAML+"\n"+tt.section, testSessionBaseYAML)
			cfg, err := Load(pipelinePath, sessionPath)
			if err != nil {
				t.Fatalf("Load() error = %v", err)
			}
			err = Validate(cfg)
			if tt.wantErr == "" {
				if err != nil {
					t.Fatalf("Validate() error = %v", err)
				}
				output := cfg.Pipeline.Notarius.Outputs["npc_registry"]
				if output.LaneID != "npc-registry" || output.ModuleKey != "dnd/npc-registry" {
					t.Fatalf("normalized output = %#v", output)
				}
				return
			}
			if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
				t.Fatalf("Validate() error = %v, want containing %q", err, tt.wantErr)
			}
		})
	}
}

func TestExtractionReferencesRequireDeclaredOutput(t *testing.T) {
	declared := `notarius:
  enabled: false
  outputs:
    npc_registry: {}
`
	tests := []struct {
		name    string
		body    string
		wantErr string
	}{
		{
			name: "scriptorium declared extraction",
			body: declared + `scriptorium:
  artifacts:
    recap:
      inputs:
        npcs:
          source: narratio.extraction.npc_registry
`,
		},
		{
			name: "scriptorium unknown extraction",
			body: declared + `scriptorium:
  artifacts:
    recap:
      inputs:
        npcs:
          source: narratio.extraction.unknown
`,
			wantErr: `references unknown extraction output "unknown"`,
		},
		{
			name: "publish declared extraction",
			body: declared + `publish:
  outputs:
    - source: narratio.extraction.npc_registry
      dest: artifacts/npc-registry.json
`,
		},
		{
			name: "publish unknown extraction",
			body: declared + `publish:
  outputs:
    - source: narratio.extraction.unknown
      dest: artifacts/unknown.json
`,
			wantErr: `extraction output "unknown" is not defined`,
		},
		{
			name: "publish lock declared extraction",
			body: declared + `publish:
  locks:
    - source: narratio.extraction.npc_registry
`,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			pipelinePath, sessionPath := writeConfigFiles(t, testPipelineBaseYAML+"\n"+tt.body, testSessionBaseYAML)
			cfg, err := Load(pipelinePath, sessionPath)
			if err != nil {
				t.Fatalf("Load() error = %v", err)
			}
			err = Validate(cfg)
			if tt.wantErr == "" {
				if err != nil {
					t.Fatalf("Validate() error = %v", err)
				}
				return
			}
			if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
				t.Fatalf("Validate() error = %v, want containing %q", err, tt.wantErr)
			}
		})
	}
}