#include "cli_combat_ratings_catalog.hpp"
#include "cli_arg_parse.hpp"
#include "cli_box_emitter.hpp"

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

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

namespace wowee {
namespace editor {
namespace cli {

namespace {

std::string stripWcrrExt(std::string base) {
    stripExt(base, ".wcrr");
    return base;
}

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

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

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

int handleGenDefensive(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "DefensiveCombatRatings";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWcrrExt(base);
    auto c = wowee::pipeline::WoweeCombatRatingLoader::makeDefensive(name);
    if (!saveOrError(c, base, "gen-crr-defensive")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenSpell(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "SpellCombatRatings";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWcrrExt(base);
    auto c = wowee::pipeline::WoweeCombatRatingLoader::makeSpell(name);
    if (!saveOrError(c, base, "gen-crr-spell")) 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 = stripWcrrExt(base);
    if (!wowee::pipeline::WoweeCombatRatingLoader::exists(base)) {
        std::fprintf(stderr, "WCRR not found: %s.wcrr\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeCombatRatingLoader::load(base);
    if (jsonOut) {
        nlohmann::json j;
        j["wcrr"] = base + ".wcrr";
        j["name"] = c.name;
        j["count"] = c.entries.size();
        nlohmann::json arr = nlohmann::json::array();
        for (const auto& e : c.entries) {
            arr.push_back({
                {"ratingType", e.ratingType},
                {"name", e.name},
                {"description", e.description},
                {"iconPath", e.iconPath},
                {"ratingKind", e.ratingKind},
                {"ratingKindName", wowee::pipeline::WoweeCombatRating::ratingKindName(e.ratingKind)},
                {"pointsAtL1", e.pointsAtL1},
                {"pointsAtL60", e.pointsAtL60},
                {"pointsAtL70", e.pointsAtL70},
                {"pointsAtL80", e.pointsAtL80},
                {"maxBenefitPercent", e.maxBenefitPercent},
            });
        }
        j["entries"] = arr;
        std::printf("%s\n", j.dump(2).c_str());
        return 0;
    }
    std::printf("WCRR: %s.wcrr\n", base.c_str());
    std::printf("  catalog : %s\n", c.name.c_str());
    std::printf("  ratings : %zu\n", c.entries.size());
    if (c.entries.empty()) return 0;
    std::printf("    id    kind        L1     L60    L70    L80     maxPct  name\n");
    for (const auto& e : c.entries) {
        std::printf("  %4u   %-9s   %5.2f  %5.2f  %5.2f  %6.2f   %5.1f   %s\n",
                    e.ratingType,
                    wowee::pipeline::WoweeCombatRating::ratingKindName(e.ratingKind),
                    e.pointsAtL1, e.pointsAtL60, e.pointsAtL70,
                    e.pointsAtL80, e.maxBenefitPercent,
                    e.name.c_str());
    }
    std::printf("  legend: pointsAtLN = how many rating points = 1%% benefit at level N\n");
    return 0;
}

int handleExportJson(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string outPath;
    if (parseOptArg(i, argc, argv)) outPath = argv[++i];
    base = stripWcrrExt(base);
    if (outPath.empty()) outPath = base + ".wcrr.json";
    if (!wowee::pipeline::WoweeCombatRatingLoader::exists(base)) {
        std::fprintf(stderr,
            "export-wcrr-json: WCRR not found: %s.wcrr\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeCombatRatingLoader::load(base);
    nlohmann::json j;
    j["name"] = c.name;
    nlohmann::json arr = nlohmann::json::array();
    for (const auto& e : c.entries) {
        arr.push_back({
            {"ratingType", e.ratingType},
            {"name", e.name},
            {"description", e.description},
            {"iconPath", e.iconPath},
            {"ratingKind", e.ratingKind},
            {"ratingKindName", wowee::pipeline::WoweeCombatRating::ratingKindName(e.ratingKind)},
            {"pointsAtL1", e.pointsAtL1},
            {"pointsAtL60", e.pointsAtL60},
            {"pointsAtL70", e.pointsAtL70},
            {"pointsAtL80", e.pointsAtL80},
            {"maxBenefitPercent", e.maxBenefitPercent},
        });
    }
    j["entries"] = arr;
    std::ofstream out(outPath);
    if (!out) {
        std::fprintf(stderr,
            "export-wcrr-json: cannot write %s\n", outPath.c_str());
        return 1;
    }
    out << j.dump(2) << "\n";
    out.close();
    std::printf("Wrote %s\n", outPath.c_str());
    std::printf("  source  : %s.wcrr\n", base.c_str());
    std::printf("  ratings : %zu\n", c.entries.size());
    return 0;
}

int handleImportJson(int& i, int argc, char** argv) {
    std::string jsonPath = argv[++i];
    std::string outBase;
    if (parseOptArg(i, argc, argv)) outBase = argv[++i];
    if (outBase.empty()) {
        outBase = jsonPath;
        std::string suffix = ".wcrr.json";
        if (outBase.size() > suffix.size() &&
            outBase.substr(outBase.size() - suffix.size()) == suffix) {
            outBase = outBase.substr(0, outBase.size() - suffix.size());
        } else if (outBase.size() > 5 &&
                   outBase.substr(outBase.size() - 5) == ".json") {
            outBase = outBase.substr(0, outBase.size() - 5);
        }
    }
    outBase = stripWcrrExt(outBase);
    std::ifstream in(jsonPath);
    if (!in) {
        std::fprintf(stderr,
            "import-wcrr-json: cannot read %s\n", jsonPath.c_str());
        return 1;
    }
    nlohmann::json j;
    try { in >> j; }
    catch (const std::exception& e) {
        std::fprintf(stderr,
            "import-wcrr-json: bad JSON in %s: %s\n",
            jsonPath.c_str(), e.what());
        return 1;
    }
    auto kindFromName = [](const std::string& s) -> uint8_t {
        if (s == "combat")     return wowee::pipeline::WoweeCombatRating::Combat;
        if (s == "defense")    return wowee::pipeline::WoweeCombatRating::Defense;
        if (s == "spell")      return wowee::pipeline::WoweeCombatRating::Spell;
        if (s == "resilience") return wowee::pipeline::WoweeCombatRating::Resilience;
        if (s == "other")      return wowee::pipeline::WoweeCombatRating::Other;
        return wowee::pipeline::WoweeCombatRating::Combat;
    };
    wowee::pipeline::WoweeCombatRating c;
    c.name = j.value("name", std::string{});
    if (j.contains("entries") && j["entries"].is_array()) {
        for (const auto& je : j["entries"]) {
            wowee::pipeline::WoweeCombatRating::Entry e;
            e.ratingType = je.value("ratingType", 0u);
            e.name = je.value("name", std::string{});
            e.description = je.value("description", std::string{});
            e.iconPath = je.value("iconPath", std::string{});
            if (je.contains("ratingKind") &&
                je["ratingKind"].is_number_integer()) {
                e.ratingKind = static_cast<uint8_t>(
                    je["ratingKind"].get<int>());
            } else if (je.contains("ratingKindName") &&
                       je["ratingKindName"].is_string()) {
                e.ratingKind = kindFromName(
                    je["ratingKindName"].get<std::string>());
            }
            e.pointsAtL1 = je.value("pointsAtL1", 1.0f);
            e.pointsAtL60 = je.value("pointsAtL60", 14.0f);
            e.pointsAtL70 = je.value("pointsAtL70", 22.0f);
            e.pointsAtL80 = je.value("pointsAtL80", 45.0f);
            e.maxBenefitPercent = je.value("maxBenefitPercent",
                                            100.0f);
            c.entries.push_back(e);
        }
    }
    if (!wowee::pipeline::WoweeCombatRatingLoader::save(c, outBase)) {
        std::fprintf(stderr,
            "import-wcrr-json: failed to save %s.wcrr\n", outBase.c_str());
        return 1;
    }
    std::printf("Wrote %s.wcrr\n", outBase.c_str());
    std::printf("  source  : %s\n", jsonPath.c_str());
    std::printf("  ratings : %zu\n", c.entries.size());
    return 0;
}

int handleValidate(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWcrrExt(base);
    if (!wowee::pipeline::WoweeCombatRatingLoader::exists(base)) {
        std::fprintf(stderr,
            "validate-wcrr: WCRR not found: %s.wcrr\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeCombatRatingLoader::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;
    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.ratingType);
        if (!e.name.empty()) ctx += " " + e.name;
        ctx += ")";
        if (e.ratingType == 0)
            errors.push_back(ctx + ": ratingType is 0");
        if (e.name.empty())
            errors.push_back(ctx + ": name is empty");
        if (e.ratingKind > wowee::pipeline::WoweeCombatRating::Other) {
            errors.push_back(ctx + ": ratingKind " +
                std::to_string(e.ratingKind) + " not in 0..4");
        }
        // Conversion floor must be > 0 — division by zero
        // would crash the stat resolver.
        if (e.pointsAtL1 <= 0.0f || e.pointsAtL60 <= 0.0f ||
            e.pointsAtL70 <= 0.0f || e.pointsAtL80 <= 0.0f) {
            errors.push_back(ctx +
                ": one or more pointsAtLN values <= 0 "
                "(divide-by-zero risk in stat resolver)");
        }
        if (e.maxBenefitPercent <= 0.0f) {
            errors.push_back(ctx +
                ": maxBenefitPercent " +
                std::to_string(e.maxBenefitPercent) +
                " <= 0 (rating would never grant any benefit)");
        }
        // The conversion curve should be monotonic-ascending
        // (more rating needed at higher levels). A flat or
        // descending curve is plausible only for direct 1:1
        // ratings (SpellPower / SpellPenetration / MP5).
        bool flat = e.pointsAtL1 == e.pointsAtL60 &&
                     e.pointsAtL60 == e.pointsAtL70 &&
                     e.pointsAtL70 == e.pointsAtL80;
        bool ascending = e.pointsAtL1 <= e.pointsAtL60 &&
                          e.pointsAtL60 <= e.pointsAtL70 &&
                          e.pointsAtL70 <= e.pointsAtL80;
        if (!flat && !ascending) {
            warnings.push_back(ctx +
                ": conversion curve non-monotonic (" +
                std::to_string(e.pointsAtL1) + " / " +
                std::to_string(e.pointsAtL60) + " / " +
                std::to_string(e.pointsAtL70) + " / " +
                std::to_string(e.pointsAtL80) +
                ") — typically rating cost ascends with level");
        }
        for (uint32_t prev : idsSeen) {
            if (prev == e.ratingType) {
                errors.push_back(ctx + ": duplicate ratingType");
                break;
            }
        }
        idsSeen.push_back(e.ratingType);
    }
    bool ok = errors.empty();
    if (jsonOut) {
        nlohmann::json j;
        j["wcrr"] = base + ".wcrr";
        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-wcrr: %s.wcrr\n", base.c_str());
    if (ok && warnings.empty()) {
        std::printf("  OK — %zu ratings, all ratingTypes unique, all curves monotonic\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 handleCombatRatingsCatalog(int& i, int argc, char** argv,
                                int& outRc) {
    if (std::strcmp(argv[i], "--gen-crr") == 0 && i + 1 < argc) {
        outRc = handleGenStarter(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-crr-defensive") == 0 &&
        i + 1 < argc) {
        outRc = handleGenDefensive(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-crr-spell") == 0 && i + 1 < argc) {
        outRc = handleGenSpell(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--info-wcrr") == 0 && i + 1 < argc) {
        outRc = handleInfo(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--validate-wcrr") == 0 && i + 1 < argc) {
        outRc = handleValidate(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--export-wcrr-json") == 0 && i + 1 < argc) {
        outRc = handleExportJson(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--import-wcrr-json") == 0 && i + 1 < argc) {
        outRc = handleImportJson(i, argc, argv); return true;
    }
    return false;
}

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