package cmd

import (
	"strings"
	"testing"
)

func TestBuildReviewMessages(t *testing.T) {
	tests := []struct {
		name     string
		status   string
		diff     string
		sysCheck string
		usrCheck []string
	}{
		{
			name:     "with status and diff",
			status:   "M  main.go",
			diff:     "diff --git a/main.go b/main.go\n+func foo() {}",
			sysCheck: "code reviewer",
			usrCheck: []string{"M  main.go", "diff --git a/main.go"},
		},
		{
			name:     "empty diff",
			status:   "",
			diff:     "",
			sysCheck: "code reviewer",
			usrCheck: []string{"Git status:", "Git diff:"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			msgs := buildReviewMessages(tt.status, tt.diff)

			if len(msgs) != 2 {
				t.Fatalf("expected 2 messages, got %d", len(msgs))
			}
			if msgs[0]["role"] != "system" {
				t.Errorf("first message role = %q, want %q", msgs[0]["role"], "system")
			}
			if msgs[1]["role"] != "user" {
				t.Errorf("second message role = %q, want %q", msgs[1]["role"], "user")
			}
			if !strings.Contains(strings.ToLower(msgs[0]["content"]), strings.ToLower(tt.sysCheck)) {
				t.Errorf("system prompt missing %q; got: %s", tt.sysCheck, msgs[0]["content"])
			}
			for _, check := range tt.usrCheck {
				if !strings.Contains(msgs[1]["content"], check) {
					t.Errorf("user prompt missing %q", check)
				}
			}
		})
	}
}