package cmd

import (
	"encoding/json"
	"testing"

	"github.com/lerko/nib/internal/db"
)

func TestGenerateCardData_Snippet(t *testing.T) {
	data := generateCardData(db.CardSnippet, "some snippet")
	if data == nil || *data != "{}" {
		t.Errorf("snippet should produce {}, got %v", data)
	}
}

func TestGenerateCardData_Template(t *testing.T) {
	data := generateCardData(db.CardTemplate, "deploy ${host} to ${env}")
	if data == nil {
		t.Fatal("expected non-nil data")
	}

	var parsed struct {
		Slots []struct {
			Name    string `json:"name"`
			Default string `json:"default"`
		} `json:"slots"`
	}
	if err := json.Unmarshal([]byte(*data), &parsed); err != nil {
		t.Fatal(err)
	}
	if len(parsed.Slots) != 2 {
		t.Fatalf("expected 2 slots, got %d", len(parsed.Slots))
	}
	if parsed.Slots[0].Name != "host" {
		t.Errorf("first slot: %q", parsed.Slots[0].Name)
	}
	if parsed.Slots[1].Name != "env" {
		t.Errorf("second slot: %q", parsed.Slots[1].Name)
	}
}

func TestGenerateCardData_TemplateDedupe(t *testing.T) {
	data := generateCardData(db.CardTemplate, "${x} and ${x}")
	var parsed struct {
		Slots []struct {
			Name string `json:"name"`
		} `json:"slots"`
	}
	json.Unmarshal([]byte(*data), &parsed)
	if len(parsed.Slots) != 1 {
		t.Errorf("duplicate slots should be deduped, got %d", len(parsed.Slots))
	}
}

func TestGenerateCardData_TemplateNoSlots(t *testing.T) {
	data := generateCardData(db.CardTemplate, "no placeholders here")
	var parsed struct {
		Slots []struct {
			Name string `json:"name"`
		} `json:"slots"`
	}
	json.Unmarshal([]byte(*data), &parsed)
	if len(parsed.Slots) != 0 {
		t.Errorf("expected empty slots, got %d", len(parsed.Slots))
	}
}

func TestGenerateCardData_Checklist(t *testing.T) {
	body := "[ ] step one\n[x] step two\n[ ] step three"
	data := generateCardData(db.CardChecklist, body)
	if data == nil {
		t.Fatal("expected non-nil data")
	}

	var parsed struct {
		Steps []struct {
			Text string `json:"text"`
			Done bool   `json:"done"`
		} `json:"steps"`
	}
	if err := json.Unmarshal([]byte(*data), &parsed); err != nil {
		t.Fatal(err)
	}
	if len(parsed.Steps) != 3 {
		t.Fatalf("expected 3 steps, got %d", len(parsed.Steps))
	}
	if parsed.Steps[0].Text != "step one" || parsed.Steps[0].Done {
		t.Errorf("step 0: %+v", parsed.Steps[0])
	}
	if parsed.Steps[1].Text != "step two" || !parsed.Steps[1].Done {
		t.Errorf("step 1: %+v", parsed.Steps[1])
	}
}

func TestGenerateCardData_ChecklistFallback(t *testing.T) {
	data := generateCardData(db.CardChecklist, "no checkbox syntax")
	var parsed struct {
		Steps []struct {
			Text string `json:"text"`
			Done bool   `json:"done"`
		} `json:"steps"`
	}
	json.Unmarshal([]byte(*data), &parsed)
	if len(parsed.Steps) != 1 {
		t.Fatalf("fallback should produce 1 step, got %d", len(parsed.Steps))
	}
	if parsed.Steps[0].Text != "no checkbox syntax" {
		t.Errorf("fallback step text: %q", parsed.Steps[0].Text)
	}
}

func TestGenerateCardData_Decision(t *testing.T) {
	data := generateCardData(db.CardDecision, "which db?")
	var parsed struct {
		Chose    string   `json:"chose"`
		Why      string   `json:"why"`
		Rejected []string `json:"rejected"`
	}
	if err := json.Unmarshal([]byte(*data), &parsed); err != nil {
		t.Fatal(err)
	}
	if parsed.Chose != "" || parsed.Why != "" {
		t.Error("decision fields should start empty")
	}
	if len(parsed.Rejected) != 0 {
		t.Error("rejected should start empty")
	}
}

func TestGenerateCardData_Link(t *testing.T) {
	data := generateCardData(db.CardLink, "check https://example.com/path for details")
	var parsed struct {
		URL string `json:"url"`
	}
	json.Unmarshal([]byte(*data), &parsed)
	if parsed.URL != "https://example.com/path" {
		t.Errorf("url: %q", parsed.URL)
	}
}

func TestGenerateCardData_LinkNoURL(t *testing.T) {
	data := generateCardData(db.CardLink, "no url here")
	var parsed struct {
		URL string `json:"url"`
	}
	json.Unmarshal([]byte(*data), &parsed)
	if parsed.URL != "" {
		t.Errorf("expected empty url, got %q", parsed.URL)
	}
}