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import OpenAI from "openai";

interface Course {
  title: string;
  description: string;
  duration: string;
  platform: string;
  level: string;
  benefitsInterim: string;
  benefitsDream: string;
  link: string;
}

interface Recommendation {
  courses: Course[];
  roles: Array<{
    title: string;
    description: string;
    timeline: string;
    salary: string;
  }>;
}

export async function getRecommendations(
  parsedData: any,
  dreamRole: string,
  questionnaireData?: any
): Promise<Recommendation> {
  try {
    const openai = new OpenAI({
      apiKey: process.env.OPENAI_API_KEY,
    });

    const completion = await openai.chat.completions.create({
      model: "gpt-4o-mini",
      messages: [
        {
          role: "system",
          content:
            "You are a career advisor creating personalized recommendations. you MUST provide a direct URL to the specific course page (not the platform's homepage). Use real, existing courses from platforms like Coursera, Udemy, Pluralsight, LinkedIn Learning,or edX.",
        },
        {
          role: "user",
          content: `Create detailed course recommendations based on:
            Skills: ${parsedData.skills.join(", ")}
            Experience: ${parsedData.experience.join("\n")}
            Education: ${parsedData.education.join("\n")}
            Dream Role: ${dreamRole}

            Additional Personal Context:
            - Current Status: ${questionnaireData.currentStatus}
            - Interested in Interim Role: ${questionnaireData.interimRole}
            - Motivation: ${questionnaireData.motivation}
            - Preferred Learning Style: ${questionnaireData.learningPreference}
            - Daily Time Commitment: ${questionnaireData.timeCommitment} hours
            - Main Challenges: ${questionnaireData.challenges.join(", ")}
            - Target Timeframe: ${questionnaireData.timeframe}

            For each course recommendation, you must include:
            1. A clear explanation of how it helps with interim roles (benefitsInterim)
            2. A clear explanation of how it contributes to the dream role (benefitsDream)
            3. A valid course URL from platforms like Coursera, Udemy, Pluralsight, LinkedIn Learning, or edX

            Return exactly this JSON structure:
            {
              "courses": [
                {
                  "title": "Course Name",
                  "description": "Course Description",
                  "duration": "Duration",
                  "platform": "Platform Name",
                  "learningStyle": "Learning Style",
                  "benefitsInterim": "Provide a specific 1-2 sentence explanation of how this course helps with immediate employment opportunities",
                  "benefitsDream": "Provide a specific 1-2 sentence explanation of how this course builds towards the dream role",
                  "link": "Direct URL to the specific course""
                }
              ],
              "roles": [
                {
                  "title": "Role Title",
                  "description": "Role Description",
                  "timeline": "Timeline",
                  "salary": "Salary Range"
                }
              ]
            }`,
        },
      ],
      response_format: { type: "json_object" },
    });

    if (!completion.choices[0]?.message?.content) {
      throw new Error("No recommendations generated");
    }

    const result = JSON.parse(completion.choices[0].message.content);
    console.log("Raw API response:", result);

    // Add specific course URLs as fallbacks based on course title and platform
    const coursesWithLinks = result.courses.map((course: any) => {
      let fallbackLink;
      const encodedTitle = encodeURIComponent(course.title);

      switch (course.platform.toLowerCase()) {
        case "coursera":
          fallbackLink = `https://www.coursera.org/search?query=${encodedTitle}`;
          break;
        case "udemy":
          fallbackLink = `https://www.udemy.com/courses/search/?q=${encodedTitle}`;
          break;
        case "edx":
          fallbackLink = `https://www.edx.org/search?q=${encodedTitle}`;
          break;
        default:
          fallbackLink = `https://www.google.com/search?q=${encodedTitle}+course`;
      }

      return {
        ...course,
        benefitsInterim:
          course.benefitsInterim ||
          "This course provides foundational skills needed for entry-level positions.",
        benefitsDream:
          course.benefitsDream ||
          "This course builds core competencies required for your target role.",
        link: course.link || fallbackLink,
      };
    });
    return {
      courses: coursesWithLinks,
      roles: result.roles || [],
    };
  } catch (error) {
    console.error("Error getting recommendations:", error);
    return {
      courses: [],
      roles: [],
    };
  }
}