from src.RAG import RAG
from src.model import Pixtral
from src.prompts import GENERATE_INVOICE_PROMPT, GENERATE_BRIEF_DAMAGE_DESCRIPTION_PROMPT, \
    GENERATE_DETAILED_DAMAGE_DESCRIPTION_PROMPT
from md2pdf.core import md2pdf
from rerankers import Reranker
import re
from fuzzywuzzy import fuzz


class InvoiceGenerator:
    def __init__(
            self,
            fais_index_path,
            image_invoice_index_path,
            path_to_invoices,
            path_to_images,
            reranker_model=None,
            device="cuda",
            max_model_len=4096, max_tokens=2048, gpu_memory_utilization=0.95
    ):
        self.model = Pixtral(max_model_len=max_model_len, max_tokens=max_tokens,
                             gpu_memory_utilization=gpu_memory_utilization)
        if reranker_model:
            self.reranker = Reranker(model_name=reranker_model, device=device)

        self.device = device
        self.rag = RAG(
            fais_index_path=fais_index_path,
            image_invoice_index_path=image_invoice_index_path,
            path_to_invoices=path_to_invoices,
            path_to_images=path_to_images,
            reranker=self.reranker
        )
        self.path_to_invoices = path_to_invoices
        self.path_to_images = path_to_images

    def format_invoice(self, generated_invoice, output_path, template_path="data/template.md"):
        with open(template_path, "r") as f:
            md_text = f.read()
        md_text = md_text.replace(r"<<table>>", generated_invoice)
        md2pdf(output_path, md_content=md_text)

    @staticmethod
    def check_within_range(generated_invoice, car_parts):
        def get_part_info(part_name, car_parts):
            part_name = part_name.lower()
            max_match = [None, 0]
            for part in car_parts:
                ratio = fuzz.WRatio(part_name, part.lower())
                if ratio >= 90 and ratio > max_match[1]:
                    max_match[0] = part
                    max_match[1] = ratio
            return max_match[0]

        all_lines = generated_invoice.split("\n")
        first_cost_line = 3 if all_lines[0] == '' else 2
        last_cost_line = -2 if all_lines[-1] == '' else -1
        lines = generated_invoice.split("\n")[first_cost_line:last_cost_line]
        cost_lines = [[line.strip() for line in cost_line.split("|")] for cost_line in lines]

        comparing_results = {}

        for line in cost_lines:
            part = line[0]
            cost = line[1]
            hours = line[2]
            found_part = get_part_info(part, car_parts)
            if found_part:
                comparing_results[part] = {
                    "cost_within_range": car_parts[found_part]["cost_range"][0] <= float(cost) <=
                                         car_parts[found_part]["cost_range"][1],
                    "hours_within_range": car_parts[found_part]["hours_range"][0] <= float(hours) <=
                                          car_parts[found_part]["hours_range"][1],
                    "cost_diff": float(cost) - car_parts[found_part]["average_cost"],
                    "hours_diff": float(hours) - car_parts[found_part]["average_hours"],
                    "part_info": found_part
                }
            else:
                comparing_results[part] = {}

        return comparing_results

    @staticmethod
    def check_calculations(generated_invoice):
        all_lines = generated_invoice.split("\n")
        first_cost_line = 3 if all_lines[0] == '' else 2
        last_cost_line = -2 if all_lines[-1] == '' else -1
        total_cost_line = all_lines[last_cost_line]
        lines = generated_invoice.split("\n")[first_cost_line:last_cost_line]
        cost_lines = [[line.strip() for line in cost_line.split("|")] for cost_line in lines]
        costs = [int(line[1]) + int(line[2]) * int(line[3]) for line in cost_lines]
        cost_lines = list(map(lambda x, y: [x[0], x[1], x[2], x[3], str(y)], cost_lines, costs))
        total_cost = sum(costs)
        total_cost_line = re.sub(r"\d+", f"{total_cost}", total_cost_line)

        all_lines[last_cost_line] = total_cost_line
        all_lines[first_cost_line:last_cost_line] = list(map(lambda x: " | ".join(x), cost_lines))
        return "\n".join(all_lines)

    def generate_invoice(self, image_path, output_path=None, template_path="data/template.md", car_parts=None):

        result = {}

        damage_description = self.model.generate_message_from_image(
            GENERATE_BRIEF_DAMAGE_DESCRIPTION_PROMPT, image_path
        )
        if damage_description == "Irrelevant." or len(damage_description.split()) < 5:
            return None

        result["damage_description"] = damage_description

        print("Damage Description:", damage_description)

        invoice_info, invoice_path = self.rag.find_invoice(
            image_path=image_path, return_only_path=False, damage_description=damage_description, k=5
        )
        invoice_info = invoice_info[0]
        invoice_path = invoice_path[0]
        result["invoice_info"] = invoice_info
        result["invoice_path"] = invoice_path
        result["similar_image"] = invoice_path.replace(".pdf", ".png")

        print("Invoice Path:", invoice_path)

        detailed_damage_description = self.model.generate_message_from_image(
            GENERATE_DETAILED_DAMAGE_DESCRIPTION_PROMPT, image_path
        )
        result["detailed_damage_description"] = detailed_damage_description

        print("Detailed Damage Description:", detailed_damage_description)

        generated_invoice = self.model.generate_message_from_image(
            GENERATE_INVOICE_PROMPT(invoice_info, detailed_damage_description), image_path
        ).replace("```markdown", "").replace("```", "")
        generated_invoice = self.check_calculations(generated_invoice)

        result["generated_invoice"] = generated_invoice

        if car_parts:
            comparing_results = self.check_within_range(generated_invoice, car_parts)
            result["comparing_results"] = comparing_results
            print(comparing_results)

        if output_path:
            self.format_invoice(generated_invoice=generated_invoice, output_path=output_path,
                                template_path=template_path)

        return result