#include "cli_bags_catalog.hpp"
#include "cli_arg_parse.hpp"
#include "cli_box_emitter.hpp"

#include "pipeline/wowee_bags.hpp"
#include <nlohmann/json.hpp>

#include <cstdint>
#include <cstdio>
#include <cstring>
#include <fstream>
#include <set>
#include <string>
#include <vector>

namespace wowee {
namespace editor {
namespace cli {

namespace {

std::string stripWbnkExt(std::string base) {
    stripExt(base, ".wbnk");
    return base;
}

bool saveOrError(const wowee::pipeline::WoweeBagSlot& c,
                 const std::string& base, const char* cmd) {
    if (!wowee::pipeline::WoweeBagSlotLoader::save(c, base)) {
        std::fprintf(stderr, "%s: failed to save %s.wbnk\n",
                     cmd, base.c_str());
        return false;
    }
    return true;
}

void printGenSummary(const wowee::pipeline::WoweeBagSlot& c,
                     const std::string& base) {
    std::printf("Wrote %s.wbnk\n", base.c_str());
    std::printf("  catalog : %s\n", c.name.c_str());
    std::printf("  slots   : %zu\n", c.entries.size());
}

int handleGenStarter(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "StarterBags";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWbnkExt(base);
    auto c = wowee::pipeline::WoweeBagSlotLoader::makeStarter(name);
    if (!saveOrError(c, base, "gen-bnk")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenBank(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "BankBags";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWbnkExt(base);
    auto c = wowee::pipeline::WoweeBagSlotLoader::makeBank(name);
    if (!saveOrError(c, base, "gen-bnk-bank")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenSpecial(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "SpecialBags";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWbnkExt(base);
    auto c = wowee::pipeline::WoweeBagSlotLoader::makeSpecial(name);
    if (!saveOrError(c, base, "gen-bnk-special")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleInfo(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWbnkExt(base);
    if (!wowee::pipeline::WoweeBagSlotLoader::exists(base)) {
        std::fprintf(stderr, "WBNK not found: %s.wbnk\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeBagSlotLoader::load(base);
    if (jsonOut) {
        nlohmann::json j;
        j["wbnk"] = base + ".wbnk";
        j["name"] = c.name;
        j["count"] = c.entries.size();
        nlohmann::json arr = nlohmann::json::array();
        for (const auto& e : c.entries) {
            arr.push_back({
                {"bagSlotId", e.bagSlotId},
                {"name", e.name},
                {"description", e.description},
                {"bagKind", e.bagKind},
                {"bagKindName", wowee::pipeline::WoweeBagSlot::bagKindName(e.bagKind)},
                {"containerSize", e.containerSize},
                {"displayOrder", e.displayOrder},
                {"isUnlocked", e.isUnlocked},
                {"fixedBagItemId", e.fixedBagItemId},
                {"unlockCostCopper", e.unlockCostCopper},
                {"acceptsBagSubclassMask", e.acceptsBagSubclassMask},
            });
        }
        j["entries"] = arr;
        std::printf("%s\n", j.dump(2).c_str());
        return 0;
    }
    std::printf("WBNK: %s.wbnk\n", base.c_str());
    std::printf("  catalog : %s\n", c.name.c_str());
    std::printf("  slots   : %zu\n", c.entries.size());
    if (c.entries.empty()) return 0;
    std::printf("    id    kind         size  order  unlock  cost(c)    accepts-mask  fixedBag  name\n");
    for (const auto& e : c.entries) {
        std::printf("  %4u   %-10s   %3u    %3u    %u      %7u   0x%08x   %5u  %s\n",
                    e.bagSlotId,
                    wowee::pipeline::WoweeBagSlot::bagKindName(e.bagKind),
                    e.containerSize, e.displayOrder, e.isUnlocked,
                    e.unlockCostCopper, e.acceptsBagSubclassMask,
                    e.fixedBagItemId, e.name.c_str());
    }
    return 0;
}

int handleValidate(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWbnkExt(base);
    if (!wowee::pipeline::WoweeBagSlotLoader::exists(base)) {
        std::fprintf(stderr,
            "validate-wbnk: WBNK not found: %s.wbnk\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeBagSlotLoader::load(base);
    std::vector<std::string> errors;
    std::vector<std::string> warnings;
    if (c.entries.empty()) {
        warnings.push_back("catalog has zero entries");
    }
    std::vector<uint32_t> idsSeen;
    // displayOrder values within the same bagKind should be
    // unique — duplicates would cause UI shuffle ambiguity.
    std::set<std::string> orderSeen;
    for (size_t k = 0; k < c.entries.size(); ++k) {
        const auto& e = c.entries[k];
        std::string ctx = "entry " + std::to_string(k) +
                          " (id=" + std::to_string(e.bagSlotId);
        if (!e.name.empty()) ctx += " " + e.name;
        ctx += ")";
        if (e.bagSlotId == 0)
            errors.push_back(ctx + ": bagSlotId is 0");
        if (e.name.empty())
            errors.push_back(ctx + ": name is empty");
        if (e.bagKind > wowee::pipeline::WoweeBagSlot::Wallet) {
            errors.push_back(ctx + ": bagKind " +
                std::to_string(e.bagKind) + " not in 0..7");
        }
        // A slot that's not unlocked but has unlockCostCopper=0
        // can never be unlocked through normal gameplay — flag.
        if (e.isUnlocked == 0 && e.unlockCostCopper == 0) {
            warnings.push_back(ctx +
                ": isUnlocked=0 with unlockCostCopper=0 "
                "(slot can never be unlocked in-game)");
        }
        // A fixed-bag slot (containerSize > 0, fixedBagItemId
        // = 0) with a non-zero acceptsBagSubclassMask is
        // contradictory — fixed slots don't accept equippable
        // bags. The starter MainBackpack illustrates this:
        // size=16, mask=0.
        if (e.containerSize > 0 && e.fixedBagItemId == 0 &&
            e.acceptsBagSubclassMask != 0) {
            warnings.push_back(ctx +
                ": fixed-size slot (containerSize=" +
                std::to_string(e.containerSize) +
                ") with non-zero acceptsBagSubclassMask "
                "(equippable bag would be ignored)");
        }
        // A variable slot (containerSize=0) with mask=0 can
        // never accept any bag.
        if (e.containerSize == 0 && e.acceptsBagSubclassMask == 0 &&
            e.bagKind != wowee::pipeline::WoweeBagSlot::Stable) {
            errors.push_back(ctx +
                ": variable slot (containerSize=0) with "
                "acceptsBagSubclassMask=0 — no bag can fit here");
        }
        // (bagKind, displayOrder) tuple uniqueness — within
        // the same kind the UI sorts by displayOrder, so
        // duplicates would cause ambiguous ordering.
        std::string tuple =
            std::to_string(e.bagKind) + "/" +
            std::to_string(e.displayOrder);
        if (orderSeen.count(tuple)) {
            warnings.push_back(ctx +
                ": duplicate (bagKind=" +
                wowee::pipeline::WoweeBagSlot::bagKindName(e.bagKind) +
                ", displayOrder=" +
                std::to_string(e.displayOrder) +
                ") — UI sort order is ambiguous");
        }
        orderSeen.insert(tuple);
        for (uint32_t prev : idsSeen) {
            if (prev == e.bagSlotId) {
                errors.push_back(ctx + ": duplicate bagSlotId");
                break;
            }
        }
        idsSeen.push_back(e.bagSlotId);
    }
    bool ok = errors.empty();
    if (jsonOut) {
        nlohmann::json j;
        j["wbnk"] = base + ".wbnk";
        j["ok"] = ok;
        j["errors"] = errors;
        j["warnings"] = warnings;
        std::printf("%s\n", j.dump(2).c_str());
        return ok ? 0 : 1;
    }
    std::printf("validate-wbnk: %s.wbnk\n", base.c_str());
    if (ok && warnings.empty()) {
        std::printf("  OK — %zu slots, all bagSlotIds unique, no order ambiguity\n",
                    c.entries.size());
        return 0;
    }
    if (!warnings.empty()) {
        std::printf("  warnings (%zu):\n", warnings.size());
        for (const auto& w : warnings)
            std::printf("    - %s\n", w.c_str());
    }
    if (!errors.empty()) {
        std::printf("  ERRORS (%zu):\n", errors.size());
        for (const auto& e : errors)
            std::printf("    - %s\n", e.c_str());
    }
    return ok ? 0 : 1;
}

} // namespace

bool handleBagsCatalog(int& i, int argc, char** argv, int& outRc) {
    if (std::strcmp(argv[i], "--gen-bnk") == 0 && i + 1 < argc) {
        outRc = handleGenStarter(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-bnk-bank") == 0 && i + 1 < argc) {
        outRc = handleGenBank(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-bnk-special") == 0 && i + 1 < argc) {
        outRc = handleGenSpecial(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--info-wbnk") == 0 && i + 1 < argc) {
        outRc = handleInfo(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--validate-wbnk") == 0 && i + 1 < argc) {
        outRc = handleValidate(i, argc, argv); return true;
    }
    return false;
}

} // namespace cli
} // namespace editor
} // namespace wowee