import re

def parse_chains_md(filepath: str) -> tuple[dict, dict, dict, list, dict, dict]:
    re_start_section = re.compile(r"^##\s*Chaînes\s+avec\s+risque\s+critique", re.IGNORECASE)
    re_other_h2 = re.compile(r"^##\s+(?!(Chaînes\s+avec\s+risque\s+critique))")
    re_chain_heading = re.compile(r"^###\s*(.+)\s*→\s*(.+)\s*→\s*(.+)$")
    re_phase = re.compile(r"^\*\s*(Assemblage|Fabrication|Minerai|Extraction|Traitement)", re.IGNORECASE)
    re_IHH = re.compile(r"IHH\s*[:]\s*([0-9]+(?:\.[0-9]+)?)")
    re_ISG = re.compile(r"ISG\s*combiné\s*[:]\s*([0-9]+(?:\.[0-9]+)?)|ISG\s*[:]\s*([0-9]+(?:\.[0-9]+)?)", re.IGNORECASE)
    re_ICS = re.compile(r"ICS\s*moyen\s*[:]\s*([0-9]+(?:\.[0-9]+)?)", re.IGNORECASE)
    re_IVC = re.compile(r"IVC\s*[:]\s*([0-9]+(?:\.[0-9]+)?)", re.IGNORECASE)

    produits, composants, mineraux, chains = {}, {}, {}, []
    descriptions = {}
    details_sections = {}
    current_chain = None
    current_phase = None
    current_section = None
    in_section = False

    with open(filepath, encoding="utf-8") as f:
        for raw_line in f:
            line = raw_line.strip()
            if not in_section:
                if re_start_section.match(line):
                    in_section = True
                continue
            if re_other_h2.match(line):
                break
            m_chain = re_chain_heading.match(line)
            if m_chain:
                prod, comp, miner = map(str.strip, m_chain.groups())
                produits.setdefault(prod, {"IHH_Assemblage": None, "ISG_Assemblage": None})
                composants.setdefault(comp, {"IHH_Fabrication": None, "ISG_Fabrication": None})
                mineraux.setdefault(miner, {
                    "ICS": None, "IVC": None,
                    "IHH_Extraction": None, "ISG_Extraction": None,
                    "IHH_Traitement": None, "ISG_Traitement": None
                })
                chains.append({"produit": prod, "composant": comp, "minerai": miner})
                current_chain = {"prod": prod, "comp": comp, "miner": miner}
                current_phase = None
                current_section = f"{prod} → {comp} → {miner}"
                descriptions[current_section] = ""
                continue
            if current_chain is None:
                continue
            m_phase = re_phase.match(line)
            if m_phase:
                current_phase = m_phase.group(1).capitalize()
                continue
            if current_phase:
                p = current_chain
                if current_phase == "Assemblage":
                    if (m := re_IHH.search(line)):
                        produits[p["prod"]]["IHH_Assemblage"] = float(m.group(1))
                        continue
                    if (m := re_ISG.search(line)):
                        raw = m.group(1) or m.group(2)
                        produits[p["prod"]]["ISG_Assemblage"] = float(raw)
                        continue
                if current_phase == "Fabrication":
                    if (m := re_IHH.search(line)):
                        composants[p["comp"]]["IHH_Fabrication"] = float(m.group(1))
                        continue
                    if (m := re_ISG.search(line)):
                        raw = m.group(1) or m.group(2)
                        composants[p["comp"]]["ISG_Fabrication"] = float(raw)
                        continue
                if current_phase == "Minerai":
                    if (m := re_ICS.search(line)):
                        mineraux[p["miner"]]["ICS"] = float(m.group(1))
                        continue
                    if (m := re_IVC.search(line)):
                        mineraux[p["miner"]]["IVC"] = float(m.group(1))
                        continue
                if current_phase == "Extraction":
                    if (m := re_IHH.search(line)):
                        mineraux[p["miner"]]["IHH_Extraction"] = float(m.group(1))
                        continue
                    if (m := re_ISG.search(line)):
                        raw = m.group(1) or m.group(2)
                        mineraux[p["miner"]]["ISG_Extraction"] = float(raw)
                        continue
                if current_phase == "Traitement":
                    if (m := re_IHH.search(line)):
                        mineraux[p["miner"]]["IHH_Traitement"] = float(m.group(1))
                        continue
                    if (m := re_ISG.search(line)):
                        raw = m.group(1) or m.group(2)
                        mineraux[p["miner"]]["ISG_Traitement"] = float(raw)
                        continue
            else:
                if current_section:
                    descriptions[current_section] += raw_line

    # Parse detailed sections from the complete file
    with open(filepath, encoding="utf-8") as f:
        content = f.read()

    # Extract sections using regex patterns
    lines = content.split('\n')

    # Find section boundaries
    operations_start = None
    minerais_start = None

    for i, line in enumerate(lines):
        if line.strip() == "## Détails des opérations":
            operations_start = i
        elif line.strip() == "## Détails des minerais":
            minerais_start = i

    if operations_start is not None:
        # Parse operations section (assemblage and fabrication)
        operations_end = minerais_start if minerais_start else len(lines)
        operations_lines = lines[operations_start:operations_end]

        current_section_name = None
        current_content = []

        for line in operations_lines:
            if line.startswith("### ") and " et " in line:
                # Save previous section
                if current_section_name and current_content:
                    details_sections[current_section_name] = '\n'.join(current_content)

                # Start new section
                section_title = line.replace("### ", "").strip()
                if " et Assemblage" in section_title:
                    product_name = section_title.replace(" et Assemblage", "").strip()
                    current_section_name = f"{product_name}_assemblage"
                elif " et Fabrication" in section_title:
                    component_name = section_title.replace(" et Fabrication", "").strip()
                    current_section_name = f"{component_name}_fabrication"
                current_content = []
            elif current_section_name:
                current_content.append(line)

        # Save last section
        if current_section_name and current_content:
            details_sections[current_section_name] = '\n'.join(current_content)

    if minerais_start is not None:
        # Parse minerais section
        minerais_lines = lines[minerais_start:]

        current_minerai = None
        current_section_type = "general"
        current_content = []

        for line in minerais_lines:
            if line.startswith("### ") and "→" not in line and " et " not in line:
                # Save previous section
                if current_minerai and current_content:
                    details_sections[f"{current_minerai}_{current_section_type}"] = '\n'.join(current_content)

                # Start new minerai
                current_minerai = line.replace("### ", "").strip()
                current_section_type = "general"
                current_content = []

            elif line.startswith("#### Extraction"):
                # Save previous section
                if current_minerai and current_content:
                    details_sections[f"{current_minerai}_{current_section_type}"] = '\n'.join(current_content)

                current_section_type = "extraction"
                current_content = []

            elif line.startswith("#### Traitement"):
                # Save previous section
                if current_minerai and current_content:
                    details_sections[f"{current_minerai}_{current_section_type}"] = '\n'.join(current_content)

                current_section_type = "traitement"
                current_content = []

            elif line.startswith("## ") and current_minerai:
                # End of minerais section
                if current_content:
                    details_sections[f"{current_minerai}_{current_section_type}"] = '\n'.join(current_content)
                break

            elif current_minerai:
                current_content.append(line)

        # Save last section
        if current_minerai and current_content:
            details_sections[f"{current_minerai}_{current_section_type}"] = '\n'.join(current_content)

    return produits, composants, mineraux, chains, descriptions, details_sections