package review

import (
	"strings"
	"testing"
)

func TestBuildPersonaSystemPrompt(t *testing.T) {
	p := &Persona{
		Name:        "security",
		DisplayName: "Security Specialist",
		Identity:    "You are a security specialist.",
		Focus:       []string{"injection attacks", "auth bypass"},
		Ignore:      []string{"code style", "performance"},
		Severity: Severity{
			Major: "exploitable vulnerabilities",
			Minor: "defense in depth",
			Nit:   "theoretical risks",
		},
	}

	prompt := BuildPersonaSystemPrompt(p)

	// Check identity is included
	if !strings.Contains(prompt, "You are a security specialist.") {
		t.Error("prompt should contain identity")
	}

	// Check focus areas
	if !strings.Contains(prompt, "Focus Areas") {
		t.Error("prompt should contain Focus Areas section")
	}
	if !strings.Contains(prompt, "injection attacks") {
		t.Error("prompt should contain focus item")
	}

	// Check ignore section
	if !strings.Contains(prompt, "Out of Scope") {
		t.Error("prompt should contain Out of Scope section")
	}
	if !strings.Contains(prompt, "code style") {
		t.Error("prompt should contain ignore item")
	}

	// Check severity calibration
	if !strings.Contains(prompt, "Severity Calibration") {
		t.Error("prompt should contain Severity Calibration section")
	}
	if !strings.Contains(prompt, "exploitable vulnerabilities") {
		t.Error("prompt should contain major severity definition")
	}

	// Check JSON output format is included
	if !strings.Contains(prompt, `"verdict"`) {
		t.Error("prompt should contain JSON output format")
	}
	if !strings.Contains(prompt, "APPROVE") {
		t.Error("prompt should mention APPROVE verdict")
	}
}

func TestBuildPersonaSystemPromptMinimal(t *testing.T) {
	// Minimal persona with only required fields
	p := &Persona{
		Name:     "minimal",
		Identity: "You are a minimal reviewer.",
	}

	prompt := BuildPersonaSystemPrompt(p)

	// Should still work without optional fields
	if !strings.Contains(prompt, "You are a minimal reviewer.") {
		t.Error("prompt should contain identity")
	}

	// Should not have empty sections
	if strings.Contains(prompt, "Focus Areas") && !strings.Contains(prompt, "Concentrate your review on:") {
		t.Error("should not have Focus Areas header without content")
	}
}

func TestBuildSystemPromptWithPersona(t *testing.T) {
	t.Run("with persona", func(t *testing.T) {
		p := &Persona{
			Name:     "test",
			Identity: "Test persona identity.",
			Focus:    []string{"testing"},
		}

		prompt := BuildSystemPromptWithPersona(p, "test conventions", "test patterns")

		if !strings.Contains(prompt, "Test persona identity.") {
			t.Error("should contain persona identity")
		}
		if !strings.Contains(prompt, "test conventions") {
			t.Error("should contain conventions")
		}
		if !strings.Contains(prompt, "test patterns") {
			t.Error("should contain patterns")
		}
	})

	t.Run("without persona", func(t *testing.T) {
		prompt := BuildSystemPromptWithPersona(nil, "test conventions", "test patterns")

		// Should use default system base
		if !strings.Contains(prompt, "expert code reviewer") {
			t.Error("should contain default system base when no persona")
		}
		if !strings.Contains(prompt, "test conventions") {
			t.Error("should contain conventions")
		}
	})

	t.Run("empty conventions and patterns", func(t *testing.T) {
		p := &Persona{
			Name:     "test",
			Identity: "Test identity.",
		}

		prompt := BuildSystemPromptWithPersona(p, "", "")

		if strings.Contains(prompt, "Language Patterns") {
			t.Error("should not contain patterns section when empty")
		}
		if strings.Contains(prompt, "Repository Conventions") {
			t.Error("should not contain conventions section when empty")
		}
	})
}

func TestPersonaPromptContainsOutputRules(t *testing.T) {
	p := &Persona{
		Name:     "test",
		Identity: "Test.",
	}

	prompt := BuildPersonaSystemPrompt(p)

	// Must contain the critical output rules
	requiredStrings := []string{
		"APPROVE",
		"REQUEST_CHANGES",
		"MAJOR",
		"MINOR",
		"NIT",
		"verdict",
		"findings",
		"CI",
	}

	for _, s := range requiredStrings {
		if !strings.Contains(prompt, s) {
			t.Errorf("prompt should contain %q", s)
		}
	}
}