from __future__ import annotations

import json
from collections import Counter
from dataclasses import dataclass
from pathlib import Path
from typing import Any

from ..config import ClientConfig, client_dir
from ..google_ads import get_google_ads_client, run_query
from ..history import append_change_markdown, append_history, now_local
from ..knowledge.store import rules_for_task
from ..table import print_table


TASK_ID = "check_campaign_languages"
TASK_NAME = "Sprawdzenie jezykow kampanii"


SCOPE = [
    {
        "area": "Jezyki kampanii",
        "check": "Wypisz jezyki przypisane do kampanii i oznacz kampanie bez jawnych kryteriow jezykowych.",
    },
    {
        "area": "Rynek klienta",
        "check": "Oznacz ustawienia wymagajace recznej oceny zgodnosci z rynkiem klienta.",
    },
    {
        "area": "Typ kampanii",
        "check": "Pokaz jezyki razem z typem kampanii, zeby osobno oceniac Search, Shopping i PMax.",
    },
    {
        "area": "Audyt miesieczny",
        "check": "Przygotuj szybki przeglad ustawien jezykowych, ktory mozna wykonywac rzadziej niz budzety i anomalie.",
    },
]


OUT_OF_SCOPE = [
    "budzety i wykorzystanie budzetu",
    "strategie stawek oraz cele Docelowy ROAS/Docelowy CPA",
    "zapytania uzytkownikow oraz wykluczenia",
    "reklamy RSA, assety i kreacje",
    "wdrazanie zmian jezykow na koncie Google Ads",
]


@dataclass
class CampaignLanguagePlan:
    campaigns: list[dict]
    language_summary: list[dict]
    channel_summary: list[dict]
    scope: list[dict]
    out_of_scope: list[str]
    knowledge_rules: list[dict]
    warnings: list[str]

    def to_dict(self) -> dict:
        return {
            "task": TASK_ID,
            "task_name": TASK_NAME,
            "campaigns": self.campaigns,
            "language_summary": self.language_summary,
            "channel_summary": self.channel_summary,
            "scope": self.scope,
            "out_of_scope": self.out_of_scope,
            "knowledge_rules": self.knowledge_rules,
            "warnings": self.warnings,
            "changes": [],
        }

    @classmethod
    def from_dict(cls, data: dict) -> "CampaignLanguagePlan":
        return cls(
            campaigns=data.get("campaigns", []),
            language_summary=data.get("language_summary", []),
            channel_summary=data.get("channel_summary", []),
            scope=data.get("scope", []),
            out_of_scope=data.get("out_of_scope", []),
            knowledge_rules=data.get("knowledge_rules", []),
            warnings=data.get("warnings", []),
        )


def enum_name(value: Any) -> str:
    name = getattr(value, "name", None)
    if name:
        return name
    return str(value)


def md_cell(value: Any) -> str:
    return str(value or "").replace("|", "\\|").replace("\n", " ").strip()


def language_label(resource_name: str, language_constants: dict[str, dict]) -> str:
    language = language_constants.get(resource_name)
    if not language:
        return resource_name
    code = language.get("code", "")
    name = language.get("name", "")
    if code:
        return f"{name} ({code})" if name else code
    return name or resource_name


def campaign_flags(campaign: dict) -> list[str]:
    flags = []
    language_count = campaign["languages_count"]
    labels = " ".join(language["label"].casefold() for language in campaign["languages"])
    if language_count == 0:
        flags.append("brak jawnych jezykow")
    if language_count > 3:
        flags.append("wiele jezykow do oceny")
    if "polish" not in labels and "polski" not in labels and "pl" not in labels:
        flags.append("brak oczywistego jezyka polskiego")
    if campaign["channel_type"] in {"PERFORMANCE_MAX", "SHOPPING"}:
        flags.append("sprawdz razem z feedem i rynkiem")
    return flags or ["ok"]


def fetch_campaign_language_settings(client_config: ClientConfig) -> list[dict]:
    google_client = get_google_ads_client(use_proto_plus=True)
    rows = run_query(
        google_client,
        client_config.safe_customer_id,
        """
        SELECT
          campaign.id,
          campaign.name,
          campaign.status,
          campaign.advertising_channel_type
        FROM campaign
        WHERE campaign.status != 'REMOVED'
        """,
    )

    campaigns = []
    for row in rows:
        campaign = row.campaign
        campaigns.append(
            {
                "campaign_id": str(campaign.id),
                "campaign_name": campaign.name,
                "status": enum_name(campaign.status),
                "channel_type": enum_name(campaign.advertising_channel_type),
                "languages": [],
            }
        )
    return campaigns


def fetch_language_criteria(client_config: ClientConfig) -> tuple[dict[str, list[dict]], dict[str, dict], list[str]]:
    google_client = get_google_ads_client(use_proto_plus=True)
    warnings = []
    rows = run_query(
        google_client,
        client_config.safe_customer_id,
        """
        SELECT
          campaign.id,
          campaign_criterion.criterion_id,
          campaign_criterion.status,
          campaign_criterion.language.language_constant
        FROM campaign_criterion
        WHERE campaign.status != 'REMOVED'
          AND campaign_criterion.status != 'REMOVED'
          AND campaign_criterion.type = 'LANGUAGE'
        """,
    )

    languages_by_campaign: dict[str, list[dict]] = {}
    resource_names = set()
    for row in rows:
        campaign_id = str(row.campaign.id)
        criterion = row.campaign_criterion
        resource_name = str(criterion.language.language_constant or "")
        if resource_name:
            resource_names.add(resource_name)
        languages_by_campaign.setdefault(campaign_id, []).append(
            {
                "criterion_id": str(criterion.criterion_id),
                "resource_name": resource_name,
                "status": enum_name(criterion.status),
            }
        )

    language_constants = fetch_language_constant_names(
        google_client,
        client_config.safe_customer_id,
        sorted(resource_names),
        warnings,
    )
    return languages_by_campaign, language_constants, warnings


def fetch_language_constant_names(
    google_client,
    customer_id: str,
    resource_names: list[str],
    warnings: list[str],
) -> dict[str, dict]:
    if not resource_names:
        return {}
    language_constants: dict[str, dict] = {}
    chunk_size = 200
    for start in range(0, len(resource_names), chunk_size):
        chunk = resource_names[start : start + chunk_size]
        quoted = ", ".join(f"'{name}'" for name in chunk)
        try:
            rows = run_query(
                google_client,
                customer_id,
                f"""
                SELECT
                  language_constant.resource_name,
                  language_constant.name,
                  language_constant.code,
                  language_constant.targetable
                FROM language_constant
                WHERE language_constant.resource_name IN ({quoted})
                """,
            )
        except Exception as exc:
            warnings.append(f"Nie udalo sie pobrac nazw language_constant: {exc}")
            return language_constants
        for row in rows:
            language = row.language_constant
            language_constants[str(language.resource_name)] = {
                "resource_name": str(language.resource_name),
                "name": str(language.name or ""),
                "code": str(language.code or ""),
                "targetable": bool(language.targetable),
            }
    return language_constants


def attach_languages(
    campaigns: list[dict],
    languages_by_campaign: dict[str, list[dict]],
    language_constants: dict[str, dict],
) -> list[dict]:
    for campaign in campaigns:
        campaign_id = campaign["campaign_id"]
        campaign["languages"] = [
            {
                **item,
                "label": language_label(item["resource_name"], language_constants),
                "code": language_constants.get(item["resource_name"], {}).get("code", ""),
                "name": language_constants.get(item["resource_name"], {}).get("name", ""),
            }
            for item in languages_by_campaign.get(campaign_id, [])
        ]
        campaign["languages_count"] = len(campaign["languages"])
        campaign["flags"] = campaign_flags(campaign)
    campaigns.sort(key=lambda row: (row["channel_type"], row["campaign_name"]))
    return campaigns


def build_language_summary(campaigns: list[dict]) -> list[dict]:
    counter: Counter[str] = Counter()
    for campaign in campaigns:
        if not campaign["languages"]:
            counter["(brak jawnych jezykow)"] += 1
            continue
        for language in campaign["languages"]:
            counter[language.get("label") or language.get("resource_name") or "(brak nazwy)"] += 1
    return [{"language": key, "campaigns": value} for key, value in counter.most_common()]


def build_channel_summary(campaigns: list[dict]) -> list[dict]:
    counter = Counter(row["channel_type"] for row in campaigns)
    return [{"channel_type": key, "count": value} for key, value in counter.most_common()]


def join_language_labels(languages: list[dict], limit: int = 8) -> str:
    if not languages:
        return "(brak)"
    labels = [item.get("label") or item.get("resource_name") or "" for item in languages]
    shown = labels[:limit]
    if len(labels) > limit:
        shown.append(f"... +{len(labels) - limit}")
    return ", ".join(shown)


def build_campaign_language_plan(client_config: ClientConfig) -> CampaignLanguagePlan:
    warnings = []
    try:
        campaigns = fetch_campaign_language_settings(client_config)
        languages_by_campaign, language_constants, language_warnings = fetch_language_criteria(client_config)
        warnings.extend(language_warnings)
        campaigns = attach_languages(campaigns, languages_by_campaign, language_constants)
    except Exception as exc:
        campaigns = []
        warnings.append(f"Nie udalo sie pobrac ustawien jezykow z Google Ads API: {exc}")

    if not campaigns:
        warnings.append("Nie znaleziono kampanii albo nie udalo sie pobrac ustawien jezykow.")

    knowledge_rules = [
        {
            "id": rule.id,
            "topic": rule.topic,
            "rule_type": rule.rule_type,
            "condition": rule.condition,
            "recommendation": rule.recommendation,
            "risk": rule.risk,
            "source": rule.source,
        }
        for rule in rules_for_task(TASK_ID)
    ]
    if not knowledge_rules:
        warnings.append(
            "Do tego zadania nie przypisano jeszcze regul z bazy wiedzy. "
            "Reguly dotyczace jezykow kampanii bedziemy dopisywac osobno po akceptacji uzytkownika."
        )

    return CampaignLanguagePlan(
        campaigns=campaigns,
        language_summary=build_language_summary(campaigns),
        channel_summary=build_channel_summary(campaigns),
        scope=SCOPE,
        out_of_scope=OUT_OF_SCOPE,
        knowledge_rules=knowledge_rules,
        warnings=warnings,
    )


def save_campaign_language_plan(domain: str, plan: CampaignLanguagePlan) -> tuple[Path, Path]:
    ts = now_local()
    base = client_dir(domain) / "plans"
    base.mkdir(parents=True, exist_ok=True)
    stem = f"{ts.strftime('%Y-%m-%d_%H-%M-%S')}_{TASK_ID}"
    json_path = base / f"{stem}.json"
    md_path = base / f"{stem}.md"
    payload = {
        "created_at": ts.isoformat(timespec="seconds"),
        "client": domain,
        **plan.to_dict(),
    }
    json_path.write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")

    lines = [
        "# Plan: Sprawdzenie jezykow kampanii",
        "",
        f"Klient: {domain}",
        f"Utworzono: {ts.isoformat(timespec='seconds')}",
        "",
        "## Podsumowanie",
        "",
        f"- Kampanie: {len(plan.campaigns)}",
        f"- Reguly wiedzy przypisane do zadania: {len(plan.knowledge_rules)}",
        "- Zmiany do wdrozenia: 0",
        "",
    ]
    if plan.warnings:
        lines.extend(["## Uwagi", ""])
        lines.extend(f"- {item}" for item in plan.warnings)
        lines.append("")
    lines.extend(["## Zakres zadania", "", "| Obszar | Co sprawdzic |", "| --- | --- |"])
    for row in plan.scope:
        lines.append(f"| {md_cell(row.get('area', ''))} | {md_cell(row.get('check', ''))} |")
    lines.append("")
    lines.extend(["## Poza zakresem tego zadania", ""])
    lines.extend(f"- {item}" for item in plan.out_of_scope)
    lines.append("")
    if plan.language_summary:
        lines.extend(["## Podsumowanie jezykow", "", "| Jezyk | Kampanie |", "| --- | --- |"])
        for row in plan.language_summary:
            lines.append(f"| {md_cell(row['language'])} | {row['campaigns']} |")
        lines.append("")
    if plan.channel_summary:
        lines.extend(["## Podsumowanie po typach kampanii", "", "| Typ | Liczba |", "| --- | --- |"])
        for row in plan.channel_summary:
            lines.append(f"| {row['channel_type']} | {row['count']} |")
        lines.append("")
    if plan.campaigns:
        lines.extend(
            [
                "## Kampanie",
                "",
                "| Kampania | Typ | Status | Jezyki | Flagi |",
                "| --- | --- | --- | --- | --- |",
            ]
        )
        for campaign in plan.campaigns:
            lines.append(
                f"| {md_cell(campaign['campaign_name'])} | {campaign['channel_type']} | {campaign['status']} | "
                f"{md_cell(join_language_labels(campaign['languages']))} | "
                f"{md_cell(', '.join(campaign['flags']))} |"
            )
        lines.append("")
    if plan.knowledge_rules:
        lines.extend(
            [
                "## Reguly z bazy wiedzy",
                "",
                "| ID | Temat | Rekomendacja | Ryzyko |",
                "| --- | --- | --- | --- |",
            ]
        )
        for rule in plan.knowledge_rules:
            lines.append(
                f"| {md_cell(rule.get('id', ''))} | {md_cell(rule.get('topic', ''))} | "
                f"{md_cell(rule.get('recommendation', ''))} | {md_cell(rule.get('risk', ''))} |"
            )
        lines.append("")
    md_path.write_text("\n".join(lines), encoding="utf-8")
    return json_path, md_path


def print_campaign_language_plan(plan: CampaignLanguagePlan) -> None:
    print("\nPlan sprawdzenia jezykow kampanii")
    print_table(
        ["Metryka", "Liczba"],
        [
            ["Kampanie", str(len(plan.campaigns))],
            ["Reguly wiedzy", str(len(plan.knowledge_rules))],
            ["Zmiany do wdrozenia", "0"],
        ],
    )
    if plan.warnings:
        print("\nUwagi")
        print_table(["Nr", "Uwaga"], [[str(index), item] for index, item in enumerate(plan.warnings, 1)])
    print("\nZakres zadania")
    print_table(
        ["Nr", "Obszar", "Co sprawdzic"],
        [[str(index), row["area"], row["check"]] for index, row in enumerate(plan.scope, 1)],
    )
    print("\nPoza zakresem")
    print_table(["Nr", "Nie analizujemy tutaj"], [[str(index), item] for index, item in enumerate(plan.out_of_scope, 1)])
    if plan.language_summary:
        print("\nPodsumowanie jezykow")
        print_table(
            ["Jezyk", "Kampanie"],
            [[row["language"], str(row["campaigns"])] for row in plan.language_summary],
        )
    if plan.channel_summary:
        print("\nPodsumowanie po typach kampanii")
        print_table(
            ["Typ", "Liczba"],
            [[row["channel_type"], str(row["count"])] for row in plan.channel_summary],
        )
    if plan.campaigns:
        print("\nKampanie")
        print_table(
            ["Nr", "Kampania", "Typ", "Jezyki", "Flagi"],
            [
                [
                    str(index),
                    campaign["campaign_name"],
                    campaign["channel_type"],
                    join_language_labels(campaign["languages"]),
                    ", ".join(campaign["flags"]),
                ]
                for index, campaign in enumerate(plan.campaigns[:30], 1)
            ],
        )
        if len(plan.campaigns) > 30:
            print(f"... oraz {len(plan.campaigns) - 30} kolejnych kampanii w pliku planu")
    if plan.knowledge_rules:
        print("\nReguly z bazy wiedzy")
        print_table(
            ["Nr", "ID", "Temat", "Rekomendacja"],
            [
                [str(index), rule["id"], rule["topic"], rule["recommendation"]]
                for index, rule in enumerate(plan.knowledge_rules[:10], 1)
            ],
        )
        if len(plan.knowledge_rules) > 10:
            print(f"... oraz {len(plan.knowledge_rules) - 10} kolejnych regul")


def print_next_navigation(domain: str) -> None:
    print("\nCo dalej:")
    print(f"1. Lista zadan klienta {domain}")
    print("2. Lista klientow")
    print("3. Zakoncz")
    print("\nKomendy:")
    print(f"1 -> python gads.py analiza-klienta --client {domain}")
    print("2 -> python gads.py analiza-klienta")


def apply_campaign_language_plan(
    client_config: ClientConfig,
    plan: CampaignLanguagePlan,
    show_navigation: bool = True,
) -> None:
    print("\nTo zadanie jest audytem jezykow kampanii i nie wdraza zmian na koncie Google Ads.")
    changes_path = append_change_markdown(client_config.domain, TASK_NAME, [])
    history_path = append_history(
        client_config.domain,
        {
            "task": TASK_NAME,
            "status": "audyt oznaczony jako wykonany",
            "campaign": ", ".join(campaign["campaign_name"] for campaign in plan.campaigns[:10]),
            "summary": {
                "campaigns": len(plan.campaigns),
                "knowledge_rules": len(plan.knowledge_rules),
                "changes": 0,
            },
        },
    )
    print(f"Historia JSONL: {history_path}")
    print(f"Historia Markdown: {changes_path}")
    if show_navigation:
        print_next_navigation(client_config.domain)


def run_check_campaign_languages(
    client_config: ClientConfig,
    global_rules: dict,
    plan_only: bool = False,
    apply_plan_path: str | None = None,
    confirm_apply: str | None = None,
    show_navigation: bool = True,
) -> None:
    _ = global_rules
    if apply_plan_path:
        if confirm_apply != "TAK":
            print("Do oznaczenia audytu jako wykonanego wymagane jest --confirm-apply TAK.")
            if show_navigation:
                print_next_navigation(client_config.domain)
            return
        plan_data = json.loads(Path(apply_plan_path).read_text(encoding="utf-8"))
        if plan_data.get("client") != client_config.domain:
            print(f"Plan jest dla klienta {plan_data.get('client')}, a wybrano {client_config.domain}.")
            if show_navigation:
                print_next_navigation(client_config.domain)
            return
        plan = CampaignLanguagePlan.from_dict(plan_data)
        print_campaign_language_plan(plan)
        apply_campaign_language_plan(client_config, plan, show_navigation=show_navigation)
        return

    print(f"\nKlient: {client_config.domain}")
    print("Przygotowuje plan sprawdzenia jezykow kampanii...")
    plan = build_campaign_language_plan(client_config)
    print_campaign_language_plan(plan)
    json_path, md_path = save_campaign_language_plan(client_config.domain, plan)
    print(f"\nPlan JSON: {json_path}")
    print(f"Plan Markdown: {md_path}")

    append_history(
        client_config.domain,
        {
            "task": TASK_NAME,
            "status": "plan przygotowany",
            "campaign": ", ".join(campaign["campaign_name"] for campaign in plan.campaigns[:10]),
            "summary": {
                "campaigns": len(plan.campaigns),
                "knowledge_rules": len(plan.knowledge_rules),
                "changes": 0,
            },
        },
    )

    if plan_only:
        print("\nTryb plan-only: zmiany nie zostaly wdrozone.")
        if show_navigation:
            print_next_navigation(client_config.domain)
        return

    print("\nBrak zmian do wdrozenia. To zadanie tworzy plan audytu jezykow kampanii.")
    if show_navigation:
        print_next_navigation(client_config.domain)
