package review

import (
	"strings"
	"testing"
)

func TestFormatMarkdown_EmptyFindings(t *testing.T) {
	result := &ReviewResult{
		Verdict:        "APPROVE",
		Summary:        "All good, no issues.",
		Findings:       []Finding{},
		Recommendation: "Merge this PR.",
	}

	got := FormatMarkdown(result, "Sonnet")

	if !strings.Contains(got, "## Summary") {
		t.Error("expected Summary header")
	}
	if !strings.Contains(got, "All good, no issues.") {
		t.Error("expected summary text")
	}
	if strings.Contains(got, "## Findings") {
		t.Error("should not contain Findings header when empty")
	}
	if !strings.Contains(got, "**APPROVE**") {
		t.Error("expected verdict in recommendation")
	}
	if !strings.Contains(got, "Review by Sonnet") {
		t.Error("expected reviewer name")
	}
}

func TestFormatMarkdown_MultipleFindings(t *testing.T) {
	result := &ReviewResult{
		Verdict: "REQUEST_CHANGES",
		Summary: "Several issues found.",
		Findings: []Finding{
			{Severity: "MAJOR", File: "main.go", Line: 42, Finding: "Nil pointer dereference"},
			{Severity: "MINOR", File: "util.go", Line: 7, Finding: "Unused variable"},
			{Severity: "NIT", File: "doc.go", Line: 1, Finding: "Typo in comment"},
		},
		Recommendation: "Fix the nil pointer issue before merging.",
	}

	got := FormatMarkdown(result, "GPT")

	if !strings.Contains(got, "## Findings") {
		t.Error("expected Findings header")
	}
	if !strings.Contains(got, "| 1 | [MAJOR] | `main.go` | 42 | Nil pointer dereference |") {
		t.Error("expected first finding row")
	}
	if !strings.Contains(got, "| 2 | [MINOR] | `util.go` | 7 | Unused variable |") {
		t.Error("expected second finding row")
	}
	if !strings.Contains(got, "| 3 | [NIT] | `doc.go` | 1 | Typo in comment |") {
		t.Error("expected third finding row")
	}
	if !strings.Contains(got, "**REQUEST_CHANGES**") {
		t.Error("expected verdict in recommendation")
	}
}

func TestFormatMarkdown_NoReviewerName(t *testing.T) {
	result := &ReviewResult{
		Verdict:        "APPROVE",
		Summary:        "Fine.",
		Findings:       []Finding{},
		Recommendation: "Go ahead.",
	}

	got := FormatMarkdown(result, "")
	if strings.Contains(got, "Review by") {
		t.Error("should not contain reviewer line when name is empty")
	}
}

func TestFormatMarkdown_SpecialChars(t *testing.T) {
	result := &ReviewResult{
		Verdict: "REQUEST_CHANGES",
		Summary: "Issues with `fmt.Sprintf` usage.",
		Findings: []Finding{
			{Severity: "MAJOR", File: "render.go", Line: 15, Finding: "Use `%v` instead of `%s` for interface{}"},
		},
		Recommendation: "Fix the format verb.",
	}

	got := FormatMarkdown(result, "Test")

	// Should contain the backtick content without breaking the table
	if !strings.Contains(got, "`render.go`") {
		t.Error("expected file in backticks")
	}
	if !strings.Contains(got, "Use `%v` instead of `%s` for interface{}") {
		t.Error("expected finding text with backticks preserved")
	}
}

func TestGiteaEvent(t *testing.T) {
	tests := []struct {
		verdict  string
		expected string
	}{
		{"APPROVE", "APPROVED"},
		{"REQUEST_CHANGES", "REQUEST_CHANGES"},
		{"UNKNOWN", "COMMENT"},
		{"", "COMMENT"},
	}

	for _, tc := range tests {
		got := GiteaEvent(tc.verdict)
		if got != tc.expected {
			t.Errorf("GiteaEvent(%q) = %q, want %q", tc.verdict, got, tc.expected)
		}
	}
}

func TestFormatMarkdown_Sentinel(t *testing.T) {
	result := &ReviewResult{
		Verdict:        "APPROVE",
		Summary:        "All good.",
		Recommendation: "Merge it.",
	}
	output := FormatMarkdown(result, "security")
	if !strings.Contains(output, "<!-- review-bot:security -->") {
		t.Error("expected sentinel comment in output")
	}

	// Empty reviewer name should NOT have sentinel
	output2 := FormatMarkdown(result, "")
	if strings.Contains(output2, "<!-- review-bot") {
		t.Error("should not contain sentinel when reviewer name is empty")
	}
}

func TestFormatMarkdown_RoleTitle(t *testing.T) {
	result := &ReviewResult{
		Verdict:        "APPROVE",
		Summary:        "All good.",
		Recommendation: "Merge it.",
	}

	// With reviewer name: should have title header
	output := FormatMarkdown(result, "security")
	if !strings.Contains(output, "# Security Review\n") {
		t.Error("expected '# Security Review' header when reviewer name is set")
	}

	output2 := FormatMarkdown(result, "gpt")
	if !strings.Contains(output2, "# Gpt Review\n") {
		t.Error("expected '# Gpt Review' header")
	}

	// Without reviewer name: no title header
	output3 := FormatMarkdown(result, "")
	if strings.Contains(output3, "# ") && strings.Contains(output3, " Review\n") {
		t.Error("should not contain role title header when reviewer name is empty")
	}
}

func TestFormatMarkdownWithDisplay(t *testing.T) {
	result := &ReviewResult{
		Verdict:        "APPROVE",
		Summary:        "Test summary",
		Findings:       nil,
		Recommendation: "Test recommendation",
	}

	t.Run("with display name", func(t *testing.T) {
		body := FormatMarkdownWithDisplay(result, "Security Specialist", "security")

		// Header should use display name
		if !strings.Contains(body, "# Security Specialist Review") {
			t.Error("header should use display name")
		}

		// Sentinel should use sentinel name
		if !strings.Contains(body, "<!-- review-bot:security -->") {
			t.Error("sentinel should use sentinel name")
		}

		// Footer "Review by" should use display name
		if !strings.Contains(body, "*Review by Security Specialist*") {
			t.Error("footer should use display name")
		}
	})

	t.Run("without display name", func(t *testing.T) {
		body := FormatMarkdownWithDisplay(result, "", "reviewer")

		// Should fall back to sentinel name for header
		if !strings.Contains(body, "# Reviewer Review") {
			t.Error("header should fall back to sentinel name")
		}

		if !strings.Contains(body, "<!-- review-bot:reviewer -->") {
			t.Error("sentinel should use sentinel name")
		}
	})

	t.Run("empty both names", func(t *testing.T) {
		body := FormatMarkdownWithDisplay(result, "", "")

		// Should not have header
		if strings.Contains(body, "# ") && strings.Contains(body, " Review") {
			t.Error("should not have header when both names empty")
		}

		// Should not have sentinel
		if strings.Contains(body, "<!-- review-bot:") {
			t.Error("should not have sentinel when sentinel name empty")
		}
	})
}